LEG 194 RESEARCH TITLES BIOSTRATIGRAPHY AND PALEOENVIRONMENT THE FOLLOWING TITLE IS EXPECTED TO BE A DETAILED PLANCTONIC FORAMINIFER STUDY. AUTHORSHIP OF SYNTHESIS (SEE BELOW) TO BE DETERMINED AT SECOND POSTCRUISE MEETING. TITLE: Leg 194 Biostratigraphic Synthesis. AUTHORS: Howell, M.W., Stewart, D., Wei, W., Lillesve, C., and Hallock-Muller, P. SAMPLE REQUEST#: 17441A OBJECTIVES AND METHODS: This work will integrate the key results of shipboard and post-cruise biostratigraphic studies, providing a refined age framework for Leg 194 sites. It will utilize data based on analyses of calcareous nannofossils, planktonic foraminifers and possibly larger benthic foraminifers. Analyses of samples taken at closely-spaced intervals will enable many datums to be refined and possibly revised. Results will be integrated with seismic data to give a regional perspective on depositional chronologies. PUBLICATION FORM: SR AUTHORSHIP OF THE FOLLOWING SYNTHETHIS PAPER TO BE DETERMNINED AT THE SECOND POSTCRUISE MEETING: TITLE: Biostratigraphy of the Marion Plateau: ODP Leg 194 AUTHORS: Stewart, Duncan, Mike Howell, Wuchang Wei. SAMPLE REQUEST#: N/A OBJECTIVES AND METHODS: This paper will combine calcareous nannofossil and planktonic foraminifer data for Leg 194. UPDATE RECEIVED FROM STEWART (9 MAY, 2001): TITLE: Menardellid Planktonic Foraminifera and Neogene Palaeoceanography. AUTHORS: Stewart, D. SAMPLE REQUEST#: 17436A Methods: This paper will be a extensive study of the Menardellid Globorotaliids and closely related groups including taxonomic revisions through descriptions, morphometrics, SEM and X-ray imaging, stable isotope analysis, ontogenetic study and cladistics. PUBLICATION FORM: SR TITLE: Calcareous nannofossil biostratigraphy of ODP Leg 194, northeastern Australian margin AUTHORS: Wei, Wuchang SAMPLE REQUEST#: 17442A OBJECTIVES AND METHODS: to work out a detailed nannofossil biostratigraphy and to extract paleoenivironmental information based nannofossil assemblages PUBLICATION FORM: SR TITLE: Larger Benthic Foraminifers in Carbonate Platforms of the Marion Plateau, Northeastern Australia: Did Lepidocyclina Survive into the late Miocene? AUTHORS: Hallock, P., Isern, A., Anselmetti, F., Chaproniere, G.C.H., Wei, W., Howell, M.W., Stewart, D., Hine, A.C., and other interested members of the Leg 194 Shipboard Party SAMPLE REQUEST#: 17433A OBJECTIVES AND METHODS: During ODP Leg 194, two carbonate platforms were drilled, originally designated MP2 at Site 1193 and MP3 at sites 1196 and 1199. Platform facies at 1193 are dominated by bryozoans and coralline algae with abundant larger benthic foraminifers. Platform facies at sites 1196/1199 are dominated by coralline red algae and larger benthic foraminifers. Among these sites and in associated periplatform sediments at sites 1194, 1197 and 1198, five assemblages of larger benthic foraminifers were tentatively identified. Two assemblages appear to be facies specific, while three assemblages occur sequentially at nearly all platform and periplatform sites and appear to represent three stages in platform development. The hypothesis to be tested is that these assemblages represent the sequence of early, middle and late Miocene intervals in platform development. Methods that will be used to test this hypothesis include detailed taxonomic and biometric assessment of the foraminiferal assemblages using non- oriented thin sections from lithified intervals, augmented by oriented thin sections of individual specimens from disaggregated material. By determining the seismic and biostratigraphic contexts for the assemblages within the platforms, the question of whether these assemblages represent a temporal sequence extending though the Miocene should be resolved. PUBLICATION FORM: outside journal TITLE: Paleoenvironmental reconstruction of Subunit IIA, Site 1196, ODP Leg 194: Implications to Sequence Stratigraphy of the Marion Plateau AUTHORS: Hallock, P, White, T., Wei, W., Hine, A.C., and other interested members of the Leg 194 Scientific Party SAMPLE REQUEST#: 17433A OBJECTIVES AND METHODS: Drilling at Site 1196 on the the Marion Plateau revealed an interval of more than 140 m of wackestone, generally in a fine grainstone matrix, described as Subunit IIA. The dominant assemblage of porcellaneous foraminifers, includes miliolids, alveolinids, soritids. The index fossil Flosculinella botangensis has been tentatively identified throughout this subunit, and combined with sporadic nannofossil identifications, indicates that this interval was deposited approximately 13.3-15.2 Ma. Pieces of organic matter were commonly observed within this subunit and shipboard analysis of biomarkers revealed signatures worthy of further analyses. We postulate that a significant portion of this interval represents deposition in a very shallow open platform setting that were likely dominated by seagrass ecosystems. We shall test this hypothesis using micropaleontological, sedimentological and biogeochemical techniques. In particular, the foraminiferal assemblages will be assessed and compared with modern seagrass assemblages. Additional biogeochemical extractions on samples from this intriguing interval will be carried out using state of the art equipment to verify and augment results from shipboard measurements. These results will be compared with biomarker studies in the literature, and, if necessary we shall also analyze modern seagrass and mangrove material for direct comparison. We also plan trace element analyses on whole rock samples, as well as carbon and oxygen isotope analyses on the shallow larger benthic foraminifer Flosculinella. PUBLICATION FORM: outside journal SEDIMENTOLOGY AND PALEOENVIRONMENT TITLE: High-resolution studies of Miocene small-scale sedimentation cycles and diagenetic patterns on the slopes and in the basins of the Marion Plateau carbonate platforms, Australian continental margin AUTHORS: Andresen, Nils; Reijmer, John J.G.; Betzler, Christian (plus collaborators: Eberli, Gregor, Bracco-Gartner, Guido, Anselmetti, Flavio) SAMPLE REQUEST#: #17423B. Additional samples are essential. The sites, which are now choosen for postcruise research are: 1195 (CS-10, basinal setting; Miocene; Lithounits IIC, III); 1197 (CS-08, downcurrent slope of the MP3/2 platform; Miocene; Lithounits II, III and IV); 1198 (CS-05, upcurrent slope of the MP3/2 platform; Miocene; Lithounits II and III); (1192 - eventually in a later stage of the research; Miocene; Lithounits IIB, III, IV and V) OBJECTIVES AND METHODS: In our study we want to concentrate on the analysis of small-scale sedimentation cycles and their image in the FMS (probably not possible due to failure of FMS at proposed sites), NGR, and SFR logs. We want to sample these cycles in high detail in the sediments recovered on the paleoslope sites 1197 and 1198 (CS08, CS05) of the Miocene carbonate platforms and the basinal site 1195 (CS10) of the Marion Plateau. This high resolution sampling will also help us to understand the small-scale diagenetic processes in response to the variations in input related to fluctuations in sea level at both sites. The correlation between the sediments, its faunal composition, grain-size distribution and geochemical proxies and the way these parameter are displayed in the logs, form the main objective of this study. In a later stage the detailed internal stacking pattern of these cycles will be compared to other periplatform cycles known from the geological record. Due to the low recovery within Megasequence C deposits along the slopes of the proposed southern MP3 platform, our research will try to focus on the slope deposits of the precursors of the MP3 platform phase (MP1?, MP2; early to middle Miocene), but within the basinal site 1195 we seem to be still able to perform the proposed studies within a few intervals of the middle to late Miocene. PUBLICATION FORM: most probably outside journal TITLE: Statistical analysis of petrographic components from the southern Marion Plateau platforms of middle to late ( ?) Miocene age (Coral Sea, northeast Australia) : facies evolution, paleoenvironments and relationships with periplatform settings (ODP Leg 194, Sites 1196 to 1199). AUTHORS: Conesa, Gilles, (assistant student ?), Leg 194 sedimentologists ? and palaeontologists ?, co-chiefs ? SAMPLE REQUEST#: 17,432A OBJECTIVES AND METHODS: Two surimposed platforms of middle and late (?) Miocene age (Sites 1196-1199) and up- and downcurrent periplatform associated deposits (Sites 1198 and 1197, respectively) were chosen and 140 samples selected. Classical petrography analysis will be applied to thin sections. Point counting and, or qualitative estimation will be conducted on biological components and possibly extended to inorganic components. Cluster analysis and correspondence factorial analysis will be applied both together on one or several basic contingency tables. The aim of the study is: - to define and to compare (bio) facies of precise (bio)sedimentary or environmental significance for both platforms and associated periplatform deposits, - to evidence (bio)sedimentary relationships and possibly sedimentary gradients between platform and periplatform settings, - to determine the factors which partly rule the (bio) facies composition and succession, - to establish the bio-sedimentary and environmental background based upon biofacies and depositional geometry, for a better understanding of Miocene isolate platforms from Coral Sea. PUBLICATION FORM: SR TITLE: Late Neogene Response of a Continental Margin Plateau to Geostrophic Flow, Sea-Level Fluctuations, and Climate Change: Life on the Marion Plateau after the Death of its Carbonate Platforms AUTHORS: Hine, Albert C., USF MS Graduate, Andresen, N., Conesa, G., John, C., Kindler, P., Wood, J., Sasaki, K., Ehrenberg, S., Hallock, P., Page, M., Stewart, D., Howell, M., Wei, W., Burns, S., Delius, H., Eberli, G., Fuller, M., Anselmetti, F., and Isern, A. SAMPLE REQUEST#: 17434A OBJECTIVES AND METHODS: After the demise of the middle to late (?) Miocene carbonate platforms, the Marion Plateau was dominated by pervasive sediment-drift development (Megasequence D) without benefit of significant neritic input. These deposits were created by vigorous current activity sweeping this continental margin terrace. However, seismic data indicate that sediment drifts incorporated distal periplatform sediments when the carbonate platforms were active. Hence, at this time these contourite edifices were constructed with a mixture of pelagic carbonate, authigenic glauconite, terrestrially-derived siliciclastic sediments (hemipelagic facies) and platform-derived sediments (neritic facies) packaged within Megasequence C. Sequence boundary (c-d) marks the platform drowning event and the loss of the neritic component to drift construction. We propose to quantify the nature of this change in the lithologic character across this boundary. Was this changeover abrupt, was it fluctuating, or was it a long drawn-out affair? Can we detect a change in depositional style (i.e, turbidites vs. coutourites)? Additionally, we propose to quantify the nature of sediment drift construction during the post-platform era (Megasequence D) particularly with regard to the recurring lithologic intervals described. We intend to define interval (cycles?) facies architecture and to relate these data to changing sea- level amplitudes and frequencies and paleoceanographic/climate conditions known to have occurred within the Pliocene and early Pleistocene. We plan to work primarily from Sites 1192 and 1195 using high- resolution sampling to develop grain size, mineralogical, isotope, seismic, logging, magnetic, carbonate constituent depth sections tied to chronostratigraphy to calculate sediment rates (mass accumulation, linear sedimentation), and to attempt to tune cyclic intervals to astronomical forcing. PUBLICATION FORM: outside journal TITLE: Orbital tuning of Milankovitch-scale climate oscillations across the Middle to Late Miocene boundary as recorded on a carbonate platform slope, Marion Plateau, Australia. AUTHORS: John, Cedric, Mutti, Maria interested members of Leg 194 Shipboard science party SAMPLE REQUEST#: 17454A OBJECTIVES AND METHODS: A high-resolution record (up to 5 k.y. sampling resolution) of middle to early late Miocene was collected on Sites 1194 and 1192 of ODP Leg 194. Data produced include carbonate and non-carbonate content (including organic carbon and clay minerals) and stable isotopes of carbon and oxygen on bulk-rock, organic matter and selected foraminifers. The variability in this record is tentatively used to explore the couplings between the global carbon cycle, oxygen isotopes and sea-level changes at different time scales. The relative proportions of different clay species is used as a proxy for weathering conditions in the source area, and will be contrasted with the other proxies. Climate oscillation as recorded on the slope of a warm-temperate platform should thus be better constrained, and the record ultimately used for orbital tuning of the selected interval. PUBLICATION FORM: outside journal TITLE: Impact of climate, paleoceanography and sea-level on the MP2 carbonate platform evolution: the slope to platform link. AUTHORS: John, Cedric , Maria Mutti, Pamela Hallock (?), interested member of Leg 194 shipboard science party. SAMPLE REQUEST#: 17453A OBJECTIVES AND METHODS: Temporal changes in MP2 platform facies (Site 1193 and 1196), as expressed by types of biota and their relative proportions, are invested and accumulation rates (based on Sr isotopes) for different events within the MP2 platform (Middle Miocene) calculated. The data generated for Site 1193 are integrated with the high-resolution record from Sites 1194-1192 (see above) to understand climatic and oceanographic controls over development of MP2. Orbital tuning of the carbonate slope should enable us to better constrain the evolution of the MP2 platform and the impact of high frequency climate changes on warm-water carbonate platform evolution. PUBLICATION FORM: outside journal TITLE: What killed the upper Miocene carbonate platform from the Marion Plateau, NE Australia ? Drowning, exposure, or both. AUTHORS: Kindler SAMPLE REQUEST#: 17,438A OBJECTIVES AND METHODS: reconstruct the demise of the MP3 platform at Sites 1196 and 1199 based on microfacies analysis and possibly stable isotope data (if Burnsie joins in). PUBLICATION FORM: outside journal TITLE: Miocene sea-level changes: the record from the Marion Plateau platform carbonates (ODP Sites 1196 and 1199, NE Australia) AUTHORS: Kindler, Hine, Eberli SAMPLE REQUEST#: 17,438A OBJECTIVES AND METHODS: reconstruct Miocene sea-level fluctuations on the basis of facies changes, logging data and possibly stable isotopes data retrieved or observed in the platform carbonates from Sites 1196 and 1199. PUBLICATION FORM: outside journal TITLE: Sea-level forced variations in Late Pleistocene cross-shelf sediment flux on a mixed carbonate/siliciclastic margin, Marion Plateau, northeast Australia. AUTHORS: Page, Michael; Dickens, Jerry; Hines, Albert SAMPLE REQUEST#: 17462A OBJECTIVES AND METHODS: The North Queensland (NQ) margin is an outstanding example of an extant mixed clastic/carbonate system, where significant quantities of shallow marine carbonate sediment accumulate with significant quantities of terrigenous clastic material over space and time. Sequence stratigraphic models predict that in such mixed systems maximum and minimum siliciclastic flux from a shelf to a basin will occur during lowstand and highstand respectively, with little or no deposition during transgression. Investigations of the NQ margin to the north of the Marion Plateau (eg. Peerdeman and Davies, 1993, Dunbar et al., 2000) indicate, however, that siliciclastic fluxes off the shelf may in fact be highest during transgression. The proposed research intends to examine the variations in the composition and relative flux of carbonate and siliciclastic material deposited at site 1198A, in response to changes in Late Pleistocene sea-level. In particular, I would like to (1) establish the siliciclastic flux during highstand, transgression and lowstand over the course of the last sea-level cycle, (2) to determine the provenance of this material, (3) to document whether high 'transgressive' siliciclastic fluxes occur in the southern part of the margin in the past 500 ka, and (4) to develop evolutionary model(s) for this site which will be compared to those generated at other locations on the NQ margin, hence aiding in the development of regional sequence stratigraphic models for the evolution of the margin in the Quaternary. A high resolution stratigraphy will be developed for this site, initially based on measurements of bulk carbonate content to establish the relative percentages of carbonate and non-carbonate material. Bulk chemistry and mineralogy will be determined using XRF and XRD techniques respectively, providing data on the composition and provenance of the clastic fraction. Oxygen isotope stratigraphy will be generated for the interval and will aid in correlating sediment deposition with fluctuations in sea-level. Additionally, the above data will generate the framework for subsequent radiocarbon dating of planktonic foraminifera in the upper section of the interval. Radiocarbon dating will provide age control on the latest Pleistocene to Holocene sediment interval. This will facilitate determination of the absolute flux of siliciclastic and carbonate sediment to this site over time, and the temporal relataionship to sea-level fluctuations. Grainsize distribution will also be meaured on all samples using a Malvern Mastersizer system, to determine variations in hydrologic transport regimes correlative with changes in sea-level. PUBLICATION FORM: outside journal TITLE: Development and demise of the Miocene platform beneath the inner Marion Plateau. AUTHORS: Sasaki, Keiichi; Yamada, Tsutomu; Iryu, Yasufumi; Matsuda, Hiroki; Hallock, Pamela SAMPLE REQUEST#: 17440A OBJECTIVES AND METHODS: We will investigate a growth history of the Miocene platform beneath the inner Marion Plateau, so called MP 2, using samples from sites 1193 and 1194. Detailed objectives are relationship between sea level change and platform development from succession of bio- and litho-facies and possible exposure surfaces deduced from oxygen and carbon isotope measurements of matrix. Especially, nature of drowning is an important theme. Examinations of biotic compositions, especially nongeniculate coralline algae, larger benthic foraminifers and possibly bryozoans can provide useful information of paleobathymetric interpretations. For age determination and correlation between cites, Sr, O and C isotopes of fossils (candidate materials are larger benthic foraminifer, bryozoan, and mollusk) will be measured. Based on these results, we will reconstruct 3rd and 4th order sea-level changes and consequent platform sedimentation and demise. PUBLICATION FORM: SR TITLE: Rhodolith growth forms and coralline algae genera as indicators of paleoenvironment, sea-level oscillation and high-frequency cyclicity in the MP3 platform phase of the Marion Plateau (Site 1196 and 1199) AUTHORS: Wood J. L, Braga, J. C. and Martin, J. M. SAMPLE REQUEST#: 17480A OBJECTIVES AND METHODS: Coralline algae are extremely abundant within the late Miocene MP3 platform, and along with larger benthic foraminifers and corals, provide the most reliable and diagnostic tool for reconstructing paleoenvironment and sea-level trends. Sites 1196 and 1199 from Leg 194 have drilled rhodolith rich floatstones and rudstones at the top of the MP3 platform. Initial study indicates these are either laminar concentric rhodoliths, some up to 70 mm in diameter, with varying amounts of laminar bryozoan intergrowth, or elongate rhodoliths which have a nucleus of platy coral. The matrix comprises branch fragments of coralline algae, larger benthic foraminifers (Amphistegina sp.) and partially dissolved Halimeda plates. The upper interval at Site 1199 in particular demonstrates cyclicity (fluctuations in rhodolith size, type and density within the textural fabric), accompanied by exposure surfaces, both minor submarine hardgrounds and possibly emergent intervals. Studies on rhodoliths may additionally be one of the most important methods for verifying the magnitude of initial reflooding at the start of the MP3 phase of platform building. High resolution digital core photos captured by the sedimentologists on Leg 194 offer a complete record of the cores recovered at Sites 1196 and 1199. Macro-scale observation and measurement of size, shape and growth form will be important in refining paleoenvironmental interpretation for rhodolith formation (current energy, potential water depth, rate of turning etc.), can be carried out using these images. Further refined interpretation of the depth of deposition relies on the taxonomic interpretation of the coralline algae present, as many genera and species are sensitive to particular controls such as light, depth and substrate type. Microfacies studies will add important information on the preservation of coralline algae and paleoenvironmental interpretations, also a means of making initial rapid determinations of the genera that are present, supplemented by SEM study techniques. PUBLICATION FORM: outside journal TITLE: Early Miocene flooding deposits of the eastern Marion Plateau, lithofacies variations and determination of paleodepth during platform initiation upon an irregular (basalt) basement surface (Sites 1196, 1197 and 1198) AUTHORS: Wood, J. L. and Hallock, P. and other Shipboard Scientists SAMPLE REQUEST#: #17480A OBJECTIVES AND METHODS: One of the key discoveries of Leg 194 is that the southeastern portion of the Marion Plateau area is that MP3 age platforms appear to grow upon older, pre-existing MP2 or even MP1 platforms. While a basement of volcanic rock was not recovered in the deep platform Hole 1196B, both the adjacent slope flanks of 1197 (Hole B) and 1198 (Hole B) record a basement of altered olivine basalt. Basement rocks are flooded in the early Miocene by a range of facies types, generally rich in larger benthic foraminifers and coralline algae (Sites 1198 and 1197), sometimes in association with such as large oysters (Sites 1196 and 1197), barnacles and bryozoans. The range of encrusting and cementing organisms is a good indicator of hard bottom substrates during initial flooding, that show varying degrees of reworking. At Site 1198 the apparently stable and deeper euphotic community of elongate coralline algal crusts (platy, ellipsoidal rhodoliths and elongate crusts) and large Lepidocyclinid foraminifers, capped by a hardground, is a particularly important discovery. In all cases, terrigenous mixing (quartz and glauconite) tends to be very high. The objective of this paper is to unravel the facies distributions during the initial flooding of the Marion Plateau basement, assessing paleodepth and environments, and making correlations where possible. This study will primarily use detailed facies analysis from shipboard cores and microfacies analysis of samples collected shipboard for thin section (sample request 17480A). PUBLICATION FORM: SR PHYSICAL PROPERTIES TITLE: Seismic sequences and their petrophysical signature across the transect AUTHORS: Anselmetti; F., A. Isern, Eberli, G., Delius,H., Bracco Gartner, G., and other PPs? SAMPLE REQUEST#: None OBJECTIVES AND METHODS: This study focuses on the pattern of physical properties within the Marion Plateau seismic megasequences. The drilled transects allow the tracking of the physical property signatures within each megasequence across a wide area covering various depositional environments. The signatures within the sequences and across the sequence boundaries will be compared and related to changes in depositional and diagenetic history. PUBLICATION FORM: outside journal TITLE: Control of early cementation on sonic velocity in subtropical carbonates AUTHORS: Bracco Gartner, Guido; Eberli, Gregor SAMPLE REQUEST#: 17443A OBJECTIVES AND METHODS: Shipboard measurements have shown that porosity-velocity relationships of the Leg 194 sediments and rocks are different from those of the tropical carbonates. The goal of the study is to a) evaluate the effects of early cementation on compressional and shear wave velocity and b) compare the calcite dominated system of the Coral Sea with the aragonite dominated Caribbean systems. Thin section analysis, including point counting of cement types an grains, will be performed on the same samples on which compressional and shear wave velocities are measreud under variable confining and pore pressures. PUBLICATION FORM: outside journal TITLE: Causes of uranium signals in shallow water carbonates AUTHORS: Delius, Heike; Bracco Gartner, Guido; Eberli, Gregor; Karner, Garry, and Dugan, Brandon SAMPLE REQUEST#: 17561A OBJECTIVES AND METHODS: We propose to study the origin and downhole log characteristics of uranium in subaerial exposure, and submarine- hardground surfaces in carbonates as an aid in log interpretation. These surface types are associated with an increase in total natural gamma radiation, most of which originates from uranium. The shapes of the uranium signal differs between the surface types and is different from the classic siliciclastic models. Submarine hardground surfaces show a spiked uranium signal, while the exposure surface and related flooding event have a sudden increase in uranium on top of the exposure which slowly decreases during the flooding stage. We will perform filament and thin section analyses in combination with chemical and XRF analyses to locate the uranium and examine the organic content that is often associated with it. High resolution sampling in intervals that extend ~20 cm above and below the sections with high natural gamma radiation measured with the MST is essential. PUBLICATION FORM: outside journal TITLE: Miocene-to-Modern Hydrogeology of the Marion Plateau AUTHORS: Dugan, B., F. Anselmetti, A. Isern SAMPLE REQUEST#: 17437A OBJECTIVES AND METHODS: This project will constrain the evolution of the physical hydrogeology of the Marion Plateau through MP2/MP3 platform growth and until the present. Hydrogeologic properties of basin sediments (e.g. porosity, permeability) will be defined as functions of stress through deformation and permeability experiments on sediment samples (Request 17437A). Seismic data will be coupled with these parameters to define regional hydrostratgraphic units within the basin and around the platforms. The platforms will be treated as separate hydrostratigraphic units. The proposed research will address: (1) mechanisms driving flow; (2) source of fluids; (3) exchange of fluids between the platforms and the basin; (4) flow rates; (5) periods of high flux; and (6) periods of flow quiescence. The work will be of use to investigators studying porewater chemistry, diagenesis, and dolomitization. PUBLICATION FORM: outside journal TITLE: The relationship of pore structures on the permeability of platform and slope carbonates and their distribution within the MP2/MP3 platform systems AUTHORS: Eberli, Gregor; Baechle, Gregor; Bracco Gartner, Guido; Ehrenberg, Stephen SAMPLE REQUEST#: 17443A OBJECTIVES AND METHODS: The goal of the study is to relate facies and diagenesis to the peremability distribution along the platform slope transects of MP2/MP3. Permeability measurements on core plugs will be compared to the pore structure of the measured plugs. Image analysis will be used to quantify the pore shape. Permeability distribution and pore shape evolution will be assessed within the platform/slope architecture and sequence stratigraphic framework to better understand the fluid flow in these systems. PUBLICATION FORM: outside journals TITLE: Timing and amplitude of sea level and current changes in the Bahamas and in the Coral Sea AUTHORS: Eberli, Gregor; Isern, Alexandra, Anselmetti, Flavio; Wright, Jim; Stewart, Duncan SAMPLE REQUEST#: NON AVAILABLE OBJECTIVES AND METHODS: Assessing global synchrony of sea level changes requires independent data sets in various ocean basins. The Bahamas Transect and the Mp2/MP3 platform systems provide such data sets. The goal of the study is compare these two systems; in particular the timing of and amplitude of the Middle Miocene - Late Miocene sea level changes. The comparison will rely on data sets produced during and after Leg 166 and Leg 194. Additional information on the amplitude of sea level in the Bahamas will require some backstripping. PUBLICATION FORM: outside journals TITLE: Factors Controlling Porosity and Permeability of Miocene Carbonate Platforms of the Marion Plateau, Offshore Northeastern Australia AUTHORS: Ehrenberg, S., Bracco-Gartner, G., Eberli, G. SAMPLE REQUEST#: 17500A OBJECTIVES AND METHODS: The goals of this project are to: (1) characterize the porosty-permeability profiles of the MP2-north and MP2/MP3-south platforms and (2) determine the depositional and diagenetic factors controlling porosity-permeability variation. This study will focus on the roles of primary sediment composition (depositional facies), extended subaerial exposure, and dolomitization regarding porosity-permeability evolution. Analyses will be limited to the cores from sites 1193, 1196, and 1199, located at the most proximal, platform-top positions, corresponding to the locations of best reservoir development in many petroleum fields in carbonate platforms. Comprehensive characterization of microfacies, rock fabric, and cement volumes will be carried out to examine correlations with porosity-permeability characteristics. Origin and timing of major cementation, dissolution, and dolomitization stages will be constrained by micro-sampling for stable isotope analyses, guided by cathodoluminescence petrography. Fluid inclusion analysis will be employed to determine the salinity of waters from which successive cement stages formed. Insofar as possible, this work will be integrated with other ongoing studies to avoid unnecessary duplication of analyses and promote synergy. However, it is important that relevant analyses are performed on the actual sample volumes measured for porosty and permeability. Results will be compared with porosity-permeability distributions from ancient carbonate platform examples from the Carboniferous and Permian of the Barents Sea and Kazakhstan to develop constraints for models of subsurface reservoir quality preservation and destruction. The Miocene examples are isolated to partially attached platforms which bear certain fundamental similarities to the above reservoirs; they are highly cyclic, hierarchical sequences whose deposition was controlled by glacio-eustatic sea-level fluctuations. The ca. 200-500 m thickness and 5-15 million year time spans of the MP2 and MP3 platforms are also roughly comparable to many Upper Paleozoic examples. However, the shallow depth and much younger age of the MP2 and MP3 strata will provide a perspective on reservoir quality controls that is much less influence by late (mesogenetic) diagenesis. PUBLICATION FORM: outside journal PALEOMAGNETISM TITLE: High-Resolution magnetostratigraphy and paleomagnetism of drift sediments at site 1195B, Leg 194, Marion Plateau, Australia. AUTHORS: Birke, Tesfaye SAMPLE REQUEST#: 17435B (8 cm3 cubes every 25-cm from Hole-1195B. I took 1 sample per section. The rest is to be sampled at College Station. OBJECTIVES AND METHODS: Long core paleomagnetic measurements at Site 1195B presented a unique magneto-stratigraphic record in Leg 194. However, shipboard results indicated residual viscous remanent magnetization (VRM) persists after 30 mT. As a result apparent spurious new polarity intervals were observed at places and at others known polarity were hidden where no unconformity was reported. The objective of this project is to make use of discreet samples and do a complete demagnetization using different techniques. Systematically combined AF and thermal demagnetization techniques will be used to clean the VRM. In addition rock magnetic checks will be carried out to completely address the objective. PUBLICATION FORM: most probably outside journal TITLE: Rock-magnetic studies to characterize influence of diagenesis on the primary magnetization of the Miocene platform carbonates, Marion Plateau, Australia. AUTHORS: Birke, Tesfaye SAMPLE REQUEST#: 17435A. Sampling completed on the ship. Most likely no need of new samples. OBJECTIVES AND METHODS: Preliminary directional and rock magnetic analyses performed on discreet samples from MP3 platform, site 1193C, indicated presence of different, accurately indeterminate magnetic minerals carrying complex magnetization. On the other hand a clear well-defined stable magnetization trend has been observed up on AF demagnetization. Therefore, the objective of the post-cruise study is to completely understand the effect of diagenesis on the primary direction of magnetization. Detailed rock magnetic experiments and directional analyses using both thermal and AF techniques will be carried out. PUBLICATION FORM: most probably outside journal TITLE: Drillling related magnetic overprints in ODP recovered sediment cores. AUTHORS: Fuller, Mike SAMPLE REQUEST#: NON AVAILABLE Objectives and Methods: This paper will pull together the various studies made on 166T, 174, 182, 189 and 194. It will cover effects of drilling induced deformation and magnetiization acquired during coring, recovery and processing. Previously, appendices have been written to each IR volume, but I think it is time to write a paper summarizing the work. N.B. There probably will be addtional authors on this paper, but it is not clear who they will be yet. PUBLICATION FORM: outside journal TITLE: Rock magnetism and paleomagetic record of hematite rich interval in Marion Plateau carbonate platform. AUTHORS: Fuller, Mike SAMPLE REQUEST#: NON AVAILABLE OBJECTIVES AND METHODS: This work will involve rock magnetic and paleomagnetic investigations across the hematite rich interval near 600mbsf at Site 1196. The aim of the work will be to document the effect of the hematite on the paleomagnetic record. An attempt will be made to date the acquisition of magnetization carried by the hematite by comparison with the Australian APW path. This may then allow us to date the arrival of the oxidizing fluids from which the hematite came. PUBLICATION FORM: outside journal GEOCHEMISTRY AND FLUID FLOW TITLE: Age and growth rate of submarine hardgrounds AUTHORS: Anselmetti, F.; M. Frank, (ETH Zuerich), P. Heck, (ETH. Zuerich) SAMPLE REQUEST#: 17560A; TSB (two shipboard thinsection billets) OBJECTIVES AND METHODS: 10Be, 9Be, and 26Al isotopes of submarine laminated crusts can be used to determine the growth rate and the age of the crusts. Two thinsection billets with laminated crusts from sites 1196 and 1194 will be analyzed first to evaluate the potential of this method to analyze Leg 194 hardgrounds. If results are promising, other hardgrounds could be analyzed as well. All analyses can be done at the ETH in Zuerich PUBLICATION FORM: outside journal TITLE: The Rise and Fall of the Dolomite Empire AUTHORS: Burns, S.J., Martin, E., unknown UMass grad student SAMPLE REQUEST#: 17420A OBJECTIVES AND METHODS: They came. They saw. They conquered. Several times in the dark history of the Marion Plateau a vast influx of magnesium ions overwhelmed the calcium carbonate shoals and lagoons that had lain peaceful since their deposition. When and why did this horrible plague erupt? What role did sea level play? A splendid volume that will investigate these tragic events using a powerful combination of isotopic, chemical and petrographic techniques. PUBLICATION FORM: outside journal TITLE: A River Runs Through It AUTHORS: Burns, S.J., Martin, E. SAMPLE REQUEST#: 17420A OBJECTIVES AND METHODS: The touching story of fluid flow in and around the MP2/MP3 platform as seen through the eyes of a family of isotopes including the hero, Strontium, father Oxygen, and brother Carbon, ably supported by a model family of flow and reaction rate calculations and shipboard data sets. PUBLICATION FORM: outside journal TITLE: Application of organic matter type characterization to sequence stratigraphic and paleoceanographic reconstructions of low total organic carbon-bearing sediments AUTHORS: White, Tim SAMPLE REQUEST#: 17475A OBJECTIVES AND METHODS: This study will involve a more detailed (than shipboard) assessment of organic matter type using Rock Eval pyrolysis of acid-digested samples, organic petrography, biomarker assays, and carbon isotopic analyses of organic matter. I intend to use these methods to assess the shipboard Rock Eval data, and then combine the information gathered from these generally low TOC samples from Leg 194 with a chapter from my dissertation that I have yet to publish (also low TOC samples). I plan for this paper to demonstrate the usefulness of organic matter ³typing² in low TOC sediments in both siliciclastic and carbonate-rich environments. I also intend to use this information in the other two contributions described below. In addition to these I will consider combining my shipboard data set with bulk density measurements, seismic stratigraphy and biostratigraphy, to discuss the significance of chemostratigraphy and mass accumulation rates, to early to middle Miocene chrono- and sequence stratigraphy. PUBLICATION FORM: outside journal TITLE: Early to middle Miocene paleoceanography of the Marion Plateau and its role in Neogene climate evolution AUTHORS: White, Tim, Tsutomu Yamada, and Pamela Hallock-Muller SAMPLE REQUEST#: 17475A OBJECTIVES AND METHODS: This is the paper that I suggest will be my (speaking for myself) major contribution to the Leg. Here, I intend to bring together all my shipboard analyses, anything listed in the above descriptions, whole rock major oxide and trace element analyses, oxygen isotopic analyses of benthic foraminifers, and perhaps spectral gamma ray data generated during shipboard logging. Oxygen isotopic analyses will focus on the outer neritic benthic foraminifers (mostly Cibicidoides), as well as the shallow larger foram Flosculinella (at Site 1196). I will use this information to address: a) the early to middle Miocene chemo- and chronostratigraphy of the carbonate platforms; b) the early to middle Miocene sea-level record on the Marion Plateau; and, c) the regional to global-scale implications of these records to the development of the Antarctic cryosphere. In addition to these I will consider combining my shipboard data set with bulk density measurements, seismic stratigraphy and biostratigraphy, to discuss the significance of chemostratigraphy and mass accumulation rates, to early to middle Miocene chrono- and sequence stratigraphy. PUBLICATION FORM: outside journal TITLE: Nature of Miocene platform dolomites from the northern Marion Plateau AUTHORS: Yamada, Tsutomu; Sasaki, Keiichi; Matsuda, Hiroki; Iryu, Yasufumi SAMPLE REQUEST#: 17439A OBJECTIVES AND METHODS: In this study, we will investigate nature of platform dolomites in sediments from the sites 1193 and 1194, and will discuss the mechanism and timing of dolomitizations. In order to achieve these objectives, we will conduct carbon and oxygen isotope measurements and chemical analysis of sediment and pore water samples. Stable isotopic ratios will be measured for purified dolomite and calcite. Chemical compositions will be measured with ICP-AES and XRF. Cement stratigraphy and Sr isotope measurements will be conducted to determine geological settings and the timings of dolomitization. PUBLICATION FORM: SR OTHER TITLE: Regional Seismic Stratigraphy - Overview and Calibration with ODP Leg 194 cores. AUTHORS: Anselmetti, F., Isern A., and scientific shipboard party SAMPLE REQUEST#: None OBJECTIVES AND METHODS: ODP Leg 194 drilling provided a unique sedimentary record to calibrate the seismic megasequences on the Marion Plateau. This overview will focus on seismic facies, unconformities, geometries and link them to the various shipboard dataset. PUBLICATION FORM: outside journal TITLE: The timing and magnitude of sea level variations as recorded by sediments of the Marion Plateau, northeast Australia: results from ODP Leg 194. AUTHORS: Isern, A.R., Anselmeti, F.A., Karner, G., Hallock-Muller, P., and Shipboard Scientific Party. SAMPLE REQUEST: None OBJECTIVES AND METHODS: The major objective of Leg 194 was to quantify the magnitude and timing of the major middle Miocene (N12-N14) sea level fall recorded by the carbonate platforms and adjacent slope sediments of the Marion Plateau. This paper will use the high-resolution, multi-channel seismic data collected as part of the Leg 194 site survey along with lithologic, paleoenvironmental, and geohistory data, to quantify the magnitude of this sea level change. PUBLICATION FORM: outside journal TITLE: The initiation and long-term development of carbonate platforms in a current-dominated environment; Marion Plateau, northeast Australia. AUTHORS: Isern, A.R., Anselmetti, F.A., Hine, A., and Eberli, G. SAMPLE REQUEST: None OBJECTIVES AND METHODS: High-resolution, multi-channel seismic data collected as part of the Leg 194 site survey as well as previous lower resolution data sets will be used to characterize the current-controlled depositional history of the carbonate platforms of the Marion Plateau. These data will be compared to the downhole logs and recovered sediments collected during Leg 194. PUBLICATION FORM: outside journal TITLE: Foundation and pre-Miocene paleogeography of the Marion Plateau, northeast Australia AUTHORS: Karner, Garry, Cédric John and Charles Langmuir(?) SAMPLE REQUEST#: 17562A OBJECTIVES AND METHODS: The adequate recovery of igneous and basement-related rocks drilled at Sites 1193, 1194, 1195, 1197 and 1198 presents an opportunity to: 1) estimate the crystallization (and possibly the alteration) age of the recovered basalts using Ar[39]/ Ar[40] dating techniques, and 2) determine the paleogeography of the Marion Plateau prior to its submergence in the early Miocene using the distribution of seismic basement and the facies of the basement-related rocks. Age dating of the igneous basement rocks are important for two reasons: 1) to assign an approximate age of the unconformity separating basement from the Oligocene-late Miocene carbonate sequences, and 2) to assess the potential role of tholeiitic volcanism during the rifting of the Marion Plateau. An age significantly younger than late Carboniferous (the time of emplacement of the Hodgkinson foldbelt of eastern Australia) is expected because of the lack of any deformation or metamorphism observed in shipboard thin sections. Recognizing tholeiitic magmatism of early Tertiary age associated with the formation of the Tasman/Coral Sea oceanic crust would be an important step forward in understanding the rift development of the Marion Plateau. PUBLICATION FORM: SR data report TITLE: Style and distribution of rifting responsible for the formation and development of the Marion Plateau, northeast Australia: Constraints from sequence stratigraphy and ODP Leg 194 drilling. AUTHORS: Karner, Garry, Flavio Anselmetti, Alexandra Isern, Gregor Eberli and Pamela Hallock. OBJECTIVES AND METHODS: Quantitative basin analysis, the merging of sequence stratigraphy with models for the deformation of the lithosphere and sediment transport processes, allows the tectonic history of a margin to be deduced. In particular, the style, spatial distribution and timing of the extensional events responsible for margin development can be quantified. The objective of this paper is to reconstruct and understand the subsidence history of the Marion Plateau. Important constraints include the nature of the basement, the timing of continental foundering, the paleowater depth as a function of space and time and the general form of basin subsidence. This information, when coupled and the distribution and age of the main sequence boundaries, will allow the history of Neogene relative sea level variations to be estimated. Additional constraints on the relative sea level curve are supplied by the timing and distribution of hardgrounds and exposure surfaces drilled in the platform sites. The final analysis should also provide constraints on the role of in-plane stress variations in contributing to the relative sea level curve. PUBLICATION FORM: J. Geophys. Res. TITLE: Log signatures of sedimentary cycles and seismic sequences, Marion Plateau, E Australia. AUTHORS: Delius H., Eberli G., Isern A., & Anselmetti F. OBJECTIVES AND METHODS: Based on logging data a characterization of sediment successions in the individual megasequences shall be performed for Sites 1194, 1195, 1196 and 1199. A subsequent cross correlation with respect to the geologic setting in terms of sequence stratigraphy will help to reveal the continuous record of the evolution of both, the platform and the slope sites, in the logged intervals. Of particular interest is the identification of cyclicity in the sediments by spectral analysis. High resolution data obtained by the FMS (Sites 1194, 1195, 1196) and the LDEO Natural Gamma Ray tool (Site 1194) will be crucial for a core-log integration. PUBLICATION FORM: outside journal