LEG 184 PROPOSED RESEARCH TITLES 12 APRIL, 1999 BIOSTRATIGRAPHY AND PALEONTOLOGY [CHEN 6 OF 7] Plio-Pleistocene Pulleniatina coiling change study at Sites 1143 and 1145 Shieh, Kai-Shuan, Horng, Chorng-Shern, Skyu, Jih-Ping and Chen, Min-Pen 16,560 We will use different stratigraphic tools to date Pulleniatina coiling change datum in Plio-Pleistocene. We try to understand the environment implication of the coiling change event in the South China Sea. [JIAN 3 OF 3] Oligocene through Pleistocene planktonic foraminifer biostratigraphy from the northern South China Sea: Comparison between slope and shelf Zhimin Jian, Stephen A. Nathan, Baohua Li, Xiaodong Zhu, Zheng Zhou et al. 16,752A Detailed biostratigraphy of planktonic foraminifers of Site 1146 and 1148. Comparison with foraminiferal sequence from the Pearl River Mouth Basin. [KUHNT 2 OF 5] Paleogene benthic foraminifers of Site 1148 Kuhnt, W. 16,584A Includes a taxonomic, biogeographic and paleobathymetric comparison to Oligocene/?Late Eocene deep water benthic foraminifer assemblages from other low latitude localities (Tethys, Caribbean, Alpine/Carpathian realm, Celebes Sea, Indian Ocean) [NATHAN 2 OF 2] Oligocene through Miocene planktonic foraminiferal biostratigraphy of Hole 1143A, 1146 A and 1148A (South China Sea), and comparison with the Ontong-Java Plateau. Steven A. Nathan, R. Mark Leckie, Zhimin Jian et al. 16610A by Stephen A. Nathan Abstract: We'll pick & describe the bugs through these intervals @ these holes. [SHYU 1 OF 4] Oligocene through Quaternary calcareous nannofossils from the South China Sea Sites 1143, 1146 and 1148 (ODP Leg 184) Jih-Ping Shyu and Xin Su 16,580A Detailed Eocene through Quaternary calcareous nannofossil biostratigraphy and quantitative study of selected species will be carried out using light microscope and SEM. This will provide detailed high resolution Oligocene to Pleistocene nannofossil biostratigraphy for Sites 1143, 1145 and 1148. If time allows I will also do the other sites as well. If I don't have time to do that in two years I will at least check the biohorizons at a higher resolution (~10 cm interval). [SU 2 OF 2] Late Cenozoic nannofossil biostratigraphy of the South China Sea: A slope-shelf comparison Xin Su, Qiang Tu, Luesheng Huang 16,567A Calcareous nannofossil stratigraphy from Oligocene to Pleistocene will be established for Sites 1146 and 1148 and compared with that from the Pearl River Mouth Basin and Ying Ge Hai Basin, northern shelf of the South China Sea. [WU 1 OF 1] Pliocene-Pleistocene pollen and phytoplankton from the northern South China Sea Wu Guoxuan, Sun Xiangjun and others 16,574A A comparative study of pollen and dinoflagellates (abundance ratio, temperature signal, etc.) of Sites 1144, 1145 and 1147. Pollen influx calculation based on quantitative analysis. Charcoal counting. [LU 1 OF 1] Late Neogene diatoms of ODP Leg 184 Jun Lu, Shengfeng Li 16,576A Stratigraphic distribution of diatoms in late Neogene sequence, with emphasis on Sites 1143 and 1146, and its implications for paleo- productivity and siliceous preservation. [MAO 1 OF 1] Oligocene and Miocene dinoflagellate assemblages and their response to paleoceanographic changes in South China Sea. Shaozhi Mao 16,567A (Xin Su) Qualitative and quantitative dinoflagellate analysis of Site 1148. Phytoplankton/pollen ratio as paleoenvironment indicator. Stratigraphic and paleoceanographic interpretations. MICROPALEONTOLOGY - PALEOPRODUCTIVITY - PALEOCEANOGRAPHY [NATHAN 1 OF 2] Late Neogene (mid-Miocene to Pleistocene) paleoceanographic history of the Western Pacific Warm Pool: A study of planktonic forminifera from the South China Sea and Ontong-Java Plateau. Stephen A. Nathan & R. Mark Leckie 16,610A I will use foraminifer assemblages and stable isotopes to document the long-term history of the warm pool. Sites SCS-9 & SCS-4 will be compared to sites from Ontong-Java to study the impact of particular events on the development and/or stability of the warm pool. [SHYU 3 OF 4] Pliocene reticulofenestrids at Site 1146: size-frequency distribution in response to climate changes Jih-Ping Shyu, M. Chen and Min-Pen Chen [SU 1 OF 2] Variations in nannofossil abundance in response to orbital forcing Xin Su 16,567A A high resolution (sample interval ca. 2 to 3 kyr) and quantitative analysis of selected nannofossil species at Site 1146 will be carried out to determine variations in their abundance in response to climatic changes (orbital-scale variations of paleo monsoon in the South China Sea). [SUN 1 OF 2] Late Cenozoic paleovegetations and paleoclimate as recorded in the deep- sea sediments from the northern South China Sea Sun Xiangjun and others 16,574A Pollen analyses of the Oligocene-Pleistocene sequence from the northern slope (Sites 1146 and 1148). Pollen-based paleovegetation reconstruction and paleomonsoon signals (air temperature, humidity, seasonality). [SUN 1 OF 2] Climate changes of the Tropics: Deep-water pollen records from the South China Sea Sun Xiangjun and others 16,574A Pollen analysis of the late Miocene-Pleistocene sequence from Site 1143 to reveal the climate history of the West Pacific Warm Poor region. [JIAN 1 OF 3] Foraminifer preservation record since 10 Ma in the South China Sea and its paleoceanographic and paleoclimatic implications Zhimin Jian, Pinxian Wang, Baohua Li, Jiliang Wang, Baoqi Huang, Fan Zheng et al. 16,572A and 16,569A by Pinxian Wang Planktonic foraminiferal fragmentation, coarse fraction content, selective preservation of species, difference in oxygen isotopes between species with different resistibility, and CaCO3 content of sediment. Emphasis on Sites 1143, 1146 and 1148. [JIAN 2 OF 3] Variations in the productivity and East Asian Monsoon: benthic foraminiferal record since 4 Ma Zhimin Jian, Wolfgang Kuhnt, Silvia Hess, Baoqi Huang et al. 16,572A Changes in proportion of benthic foraminifers indicative of high productivity, in organic carbon flux, and in isotope record of benthic foraminifers. With emphasis on Site 1143 and 1146. [ZHAO 1 OF 1] Deep-water paleoceanography of the South China Sea in relation to the basin evolution Quanhong Zhao, Baochun Zhou, Hong Wang, Zhimin Jain et al., in collaboration with Wolfgang Kuhnt 16,572A (Zhimin Jian) and16,569A (Pinxian Wang) Changes of benthic foraminiferal and ostracod faunas recorded at Site 143, 1146 and 1148, as compared with the basin evolution (connection with the Pacific, sill depth changes); isotope indication of changes in deep-water masses. [CHEN, X. 1 OF 1] Upper ocean structure of the South China Sea over 2 Ma Xingrong Chen, Baohua Li, Zhimin Jian, Tu Xia, Baoqi Huang, Jiliang Wang, Pinxian Wang et al. In collaboration with Luejiang Wang 16,569A (Pinxian Wang) Depth fluctuations of mixed zone and thermocline based on census of selected species of nannofossils, planktonic foraminifers, and isotope difference between species. Relatively high-resolution analysis for Sites 1143, 1144 and 1145, and comparison with the open Pacific (IMAGES core MD-97-2-41) [WANG, R, 1 OF 1] Radiolarian stratigraphy and paleoceanography of ODP Leg 184 Rujian Wang, Muhong Chen 16,573A Late Neogene radiolarian stratigraphy, based on Sites 1143 and 1148. Downhole variations of radiolarian abundance compared with biogenic opal distribution. Paleoceanographic interpretation of faunal changes. With emphasis on ODP Site 1143, 1148. [WANG, P. 1 OF 2] Late Neogene paleoceanography of the South China Sea: North-South contrasts Wang Pinxian, Wang Luejiang, and others 16,569A, 16564 A synthetic study of surface water paleoceanography from late Miocene onwards on the basis of microfossil and isotopic analyses, with a higher resolution for the Pleistocene. Results from the previous cruises will be included to decipher paleomonsoon signals. [WANG, P., 2 OF 2] Late Cenozoic deposits of the South China Sea and inland China: stratigraphic correlation and monsoon evolution Wang Pinxian, Zhao Quanhong, Sun Xiangjun and others 16,569A, 16,574 (Sun Xiangjun) Stratigraphic sequence and paleoenvironmental events of the South China Sea are compared with those from the inland and shelf basins of China, focused on major turning points in environmental changes ~27-25 Ma, 2.4 Ma etc.). Reconstruction of East Asian Monsoon evolution based on marine and terrestrial records. GEOMAGNETISM, PALEOMAGNETISM, AND ENVIRONMENTAL MAGNETISM [LAJ 1 OF 3] Relative Paleointensity records for the last 1.8 My from the South China Sea C. Laj, P.Solheid. + co-authors from Gif and IRM+ Biostratigraphers, oxygen isotopes 16,583A, 16,600A APC cores, Sites 1147, 1146, 1145. Requirement: multiple u-channel sampling at each site, working or archive halves [LAJ 2 OF 4] High resolution record of geomagnetic field intensity changes from high sedimentation core in the South China Sea C. Laj, P.Solheid. + co-authors from Gif and IRM+ Biostratigraphers, oxygen isotopes 16,583A, 16,600A APC cores, Site 1144. Requirement: Multiple u-channel sampling, working or archive halves [LAJ 3 OF 4] Geomagnetic field during transitional periods (if successful more than one paper) C. Laj, P.Solheid. + co-authors from Gif and IRM+ Biostratigraphers, oxygen isotopes 16,583A, 16,600A Study of the Brunhes/Matuyama, Upper and Lower Jaramillo, Upper and Lower Olduvai. Requirement: continuous discrete sampling, i.e. u-channel sampling will be cut into single specimens. Sampling should extend for at least 10,000 to 20,000 years above and below each transition. Sites 1147, 1146, 1145 [LAJ 4 OF 4] Short geomagnetic events during the Brunhes chron C. Laj, P.Solheid. + Coauthors from Gif and IRM+ Biostratigraphers, oxygen isotopes 16,583A, 16,600A Big Lost? Jamaica/Pringle Falls? Continuous u-channel sampling of Site 1144 [SOLHEID 1 OF 3] Orbitally modulated changes in terrigenous influx to the South China Sea inferred from environmental magnetism investigations at ODP Site 1146. P. Solheid, C. Laj + colleagues from Gif and IRM + Sedimentologists from ODP Leg 184. 16,583A, 16,600A Requirements: complete sampling of Site 1146 splice. In a general way, all of the paleointensity studies mentioned in A) require the study of the magnetic mineralogy (nature, concentration, and grain size of the magnetic minerals). These studies can then be used to infer possible changes in the source and/or mechanisms of transport of the magnetic minerals and by inference of the sediments they are contained in. Frequency analysis will be done to investigate whether the magnetic assemblages are orbitally modulated and its phase relation to orbital modulation will be investigated. [SOLHEID 2 OF 3] High-resolution environmental magnetic study to determine environmental conditions affecting variations in terrigenous sediment input to ODP Sites 1143 and 1144 in the South China Sea P. Solheid, C. Laj + colleagues from Gif and IRM + Sedimentologists from ODP Leg 184. 16,583A, 16,600A Requirements: complete sampling of Site 1143 splice and 1144 u-channels. In a general Way, all of the paleointensity studies mentioned in A) require the study of the magnetic mineralogy (nature, concentration, and grain size of the magnetic minerals). These studies can then be used to infer possible changes in the source and/or mechanisms of transport of the magnetic minerals and by inference of the sediments they are contained in. Frequency analysis will be done to investigate whether the magnetic assemblages are orbitally modulated and its phase relation to orbital modulation will be investigated. [SOLHEID 3 OF 3] Magnetic mineralogy variations and contributions to the magnetic susceptibility signal from the South China Sea. Focus Sites 1143 and 1144 P. Solheid, C. Laj + colleagues from Gif and IRM + Sedimentologists from ODP Leg 184. 16,583A, 16,600A Requirements: complete sampling of Site 1143 splice and 1144 u-channels. In a general way, all of the paleointensity studies mentioned in A) require the study of the magnetic mineralogy (nature, concentration, and grain size of the magnetic minerals). These studies can then be used to infer possible changes in the source and/or mechanisms of transport of the magnetic minerals and by inference of the sediments they are contained in. Frequency analysis will be done to investigate whether the magnetic assemblages are orbitally modulated and its phase relation to orbital modulation will be investigated. STABLE ISOTOPES, SST, AND PALEOCEANOGRAPY/PALEOCLIMATOLOGY [BUEHRING 1 OF 2] Stable oxygen isotope stratigraphy of Site 1144 in 2 ky resolution. Buehring, C., Sarnthein, M., P. Grootes 16,611A [BUEHRING 2 OF 2] High resolution stable oxygen isotopes stratigraphy of of the interglacial stages 5, 7, 9 (11) of Site 1144 and the paleo-monsoon evolution in the northern South China Sea. Buehring, C. 16,611A [PRELL 1 OF 2] Orbital-Scale Variability of the Asian Monsoon: A Neogene Record from Site 1146, South China Sea Prell, W.L., Clemens, S.C. 16,588A We will use the Site 1146 data to differentiate the summer and winter monsoon signals using a variety of climate proxies resolved at 2 kyr intervals. Proxies generated toward this end may involve d18O of paired benthic and planktonic foraminifers, CaCO3, alkenone SST estimates, Mg/Ca estimates, planktonic foraminifers assemblage analysis (SST, thermocline depth), lithic grain size analysis, bulk elemental analysis of the lithogenic component, Alkane analysis of plant waxes, and possibly pollen analysis. [CLEMENS 1 OF 2] Stationarity of the Asian Monsoon during Neogene Climate Change Clemens, S.C., Prell, W.L. 16,588A We will generate an astronomical chronostratigraphy spanning the past 10 million years for Site 1146 based on spliced MST data (CSR, NGR, Mag. Suscep) and stable isotope records. These as well as the monsoon proxy records cited above will be used to examine the phase of the monsoon response relative to internal and external boundary conditions (orbital, glacial, long-term CO2/vegetation forcing) in order to test the hypotheses put forth in Clemens et al, 1997 (Science. 274, 943-948). [CLEMENS 2 OF 2] Co-Evolution of the Indian and Asian Monsoon Systems Clemens, S.C., Prell, W.L. 16,588A We plan to compare the East Asian Monsoon results from Site 1146 with the work we have done on the Indian Summer Monsoon from the Site 722, Arabian Sea (Leg 117). The comparison of these time-series in the frequency domain will help establish and quantify the responses of these two monsoon systems and provide estimates of their sensitivity to various climate forcing. [PRELL 2 OF 2] Late Miocene (8 Ma) Tibetan Uplift and Monsoon Evolution: Cause and Effect? Prell, W L., Clemens, S.C., Kutzbach, J. 16,588A We plan to investigate the relationship between tectonic uplift and monsoon evolution using the proxies cited above in conjunction with ongoing General Circulation Modeling (GCM) experiments. These [MCINTYRE 1 OF 1] Millennial-scale variability of the south east Asian monsoon over the last 150 kyr at ODP Site 1145. Katherine McIntyre and Delia Oppo The goal of this work is to use oxygen and carbon isotopic signatures in foraminferal calcite to document changes in sea surface conditions, including temperature and salinity, at millennial scales over the last 150 kyr. This data can then be used to examine the role of changing precessional forcing and 100 kyr glacial-interglacial cycles in modulating millennial-scale climate in this tropical region. [WANG, L. 1 OF 1] Paleoceanography of the western Pacific and East Asian Monsoon during the last 5 million years. Wang, L., and collaborators in Hokkaido University: Oba, T. Okada, H., and additional collaborators: Wang, P. and Jian, Z., Chen, M.-P. 16,564A, and an Append Sample Request to the original sample request #16,564A (Please see documents sent to curator on JR) Although the site 1143 is located in the tropical western Pacific area where seasonality is weak and less sensitive to monsoon climate change, however, it is the only site in the southern South China Sea, where its unique settings is not as clear as those of the northern sites. The research targets are: 1) to establish a high resolution isotope stratigraphy for the last 5 my., 2) the driving mechanism and cyclicity of the Eat Asian monsoon, and its relationship with the Indian monsoon, 3) to reconstruct the paleomonsoon evolution, and 4) to reveal the monsoon climate change during the i) Northern Hemisphere Glaciation, ii) monsoon response to the uplift of the Tibet-Plateau and cryosphere development, and iii) comparison with the terrestrial records, such as loess formation in central Asia. [CHEN 1 OF 7] Pleistocene SST and water mass discrimination study at Sites 1143 and 1145. Chen, Min-Pen, Shyu, Jih-Ping and Huang, Chao-Kai 16,560 We will use the transfer function and discrimination function of planktonic foraminifers assemblages from South China Sea, East China Sea and Philippine Sea to indicate the variations of SST and water mass at Sites 1143 and 1145. [CHEN 4 OF 7] Late Miocene-Pliocene stable isotope study at Site 1143 Wei, Kuo-Yen, Chen, Min-Pen and Wang, Luejiang 16,560 We will establish the stable isotope stratigraphy of late Miocene to Pliocene to understand the sea level changes and the history of paleo- monsoon. Luejiang Wang will take the responsibility to analyze the following stable isotope records in Plio-Pleistocene at Site 1143. [CHEN 5 OF 7] Late Pleistocene stable isotope study during stages 2 to 8 at Sites 1144 and 1147. Shieh, Ying-Tzung, Chen, Min-Pen and Shyu, Jih-Ping 16,560 We will analyze the stable isotopes of several planktonic foraminifer species during the stage 2 to 8, to compare the hydrographic changes at the northern slope of the South China Sea in late Pleistocene. [CHEN 7 OF 7] Paleoceanography in the South China Sea corresponding to the uplift of Himalaya/Tibetan system and onset of northern hemisphere glaciation for the last 10 Ma Lin, Hui-Ling and Chen, Min-Pen 16,561A We will use geochemical proxy indicators, including biogenic opal content, Ge/Si ratio of diatom, stable isotopes of foraminifer tests to indicate the weathering intensity on the continent and pCO2 change in the ocean-atmosphere systems. [KUHNT 1 OF 5] The paleoproductivity record of benthic foraminifers in the South China Sea Kuhnt, W., Silvia Hess, Zhimin Jian 16584A Low resolution study of all sites includes multivariate statistics of benthic assemblages along a water depth transect and multispecies carbon isotope analyses [KUHNT 4 OF 5] Paleobathymetric trends and subsidence history of Site 1148 16584A Kuhnt, W., Clift, P. (and possibly Wetzel, A. as a trace fossil specialist) [KUHNT 5 OF 5] Longterm deep water benthic foraminiferal stable isotope record of the South China Sea 16584A Kuhnt, W., Silvia Hess and Erlenkeuser, Helmut An additional sample request for material of Site 1143 and/or 1148 will be submitted end of 1999 resolution and selection of holes depending on continuous abundance of epifaunal species (Cibicidoides), will be decided after pilot study on shipboard samples GEOCHEMISTRY AND PALEOCEANOGRAPHY [HIGGINSON 1 OF 2] High Resolution variations in marine productivity and intensity of the SE Asian monsoon during the last 1 Ma. Higginson, M.J., Maxwell, J.R., and Shackleton, N.J. Shipboard high resolution study of the abundance of Chlorins, early stage diagenetic products of Chlorophyll at ODP Site 1144 has revealed a remarkable sequence of variations coincident with glacial/interglacial cycles of the last 1 Ma. Preliminary analysis indicates a close correspondence of Chlorin abundance with global ice-volume, and predicted monsoon intensity. Additional high-resolution analysis is proposed to resolve Chlorin changes at century-scale or better to document a possible correlation with abrupt changes recorded both in the North Atlantic, and in the intensity of the Indian subtropical paleo- monsoon. [HIGGINSON 2 OF 2] Molecular Record of Environmental Change in the South China Sea since the Miocene. Higginson, M.J., Mercer, J.L, Zhao, M., and Maxwell, J.R. The distribution of organic bio-geochemical markers ('biomarkers') will be analyzed and quantified to estimate sea surface temperature, phytoplankton production and terrestrial vegetation inputs of the northern S. China Sea. Analysis of sediments from ODP Site 1148 at a time resolution of 50-100 Ka will involve collaborative work between the University of Bristol, UK (MH/JRM) and Dartmouth College, NH (JLM/MZ). Few long-term, continuous biomarker records exist, so this study will additionally present a unique opportunity to study long term diagenetic effects in a range of geochemical proxies. [TAMBURINI 1 OF 3] Phosphorus phases in sediment and nitrogen stable isotopes from Sites 1143 and 1144, during the last 125,000 years: a link between climate, continental weathering and productivity in the South China Sea. Tamburini, F., Foellmi, K., Adatte, T. 16,559A [TAMBURINI 2 OF 3] Behavior of Phosphorus in the sediment during early diagenesis Tamburini, F., McIntyre, K., Colin, C. Samples from 24 squeezed cakes, already analyzed for IW on board, from Sites 1143 and 1144. Compare the phosphorus phases in sediment with results from the pore water, to better understand the behavior of P in sediment and the processes driving its distribution. [TAMBURINI 3 OF 3] Biogenic barium to trace paleoproductivity in South China Sea. Tamburini, F., Kuhnt, W. 16,559A (In discussion). [LEVENTHAL 1 OF 1] Stable carbon isotope measurements of fossil wood and of hydrocarbon gas from Leg 184 Joel Leventhal and USGS collaborators (probably A.Warden & C. Threlkeld) as well as P.Wang collaborators for identification of fossil wood species (1 below) and Matsumoto for gas isotopes (2 below) Two objectives are undertaken: 1. Carbon isotope determinations of the fossil wood will give us a firm end member for the terrestrial stable carbon isotope value. Future work on the bulk organic matter in the sediments can then give us the marine end member for the most marine sediment and relative amounts of marine and terrestrial OM for intermediate C-isotope values. This information can then be used to quantify the input of terrestrial and marine OM into the sediment and be coupled with the accumulation rate for carbon burial, productivity, etc. (not by me). 2. Measurement of the C isotope value for the methane will confirm its bacterial origin (Site 1144) or catagenic/thermogenic origin (site 1148) and answer questions about the origin of the migrated methane from Site 1146 that is of uncertain origin. SEDIMENTOLOGY, MINERALOGY [SHYU 2 OF 4] Analysis of Australian microtektite event in the South China Sea, ODP Leg 184 Jih-Ping Shyu, Ju-Chin Chen and Min-Pen Chen We will use SEM, INAA or microproe to study the distribution, shapes and mineralogical characteristics of Pleistocene microtektites in Leg 184 cores and to compare the results with previously documented Pleistocene microtektite events.We will requst samples from an interval that across the B/M boundary. The request will be sent to ODP before the sampling party. [CHEN 2 OF 7] Late Miocene-Pleistocene loess-deposit study at Sites 1143, 1145, 1146 and 1148 Chen, Min-Pen, Chang, Shiun-Sheng, and Huang, Chao-Kai 16,560 We will analyze the grain size distribution and silt-size quartz content to indicate the origin of the loess-deposit in the South China Sea. We try to compare the physical properties fluctuations to establish the paleo-monsoon strength from the loess content in different Sites. [CHEN 3 OF 7] Kaolinite/Chlorite ratio indicating the Pleistocene paleo-monsoon and paleoceanography at Sites 1143 and 1147 16,560 Chang, Shiun-Sheng, Chen, Min-Pen and Huang, Chao-Kai 16,560 We will use the ratio of Kaolinite/Chlorite to indicate the sea level change effect in the South China Sea. We try to establish the Pleistocene paleo-current in the South China Sea. The other clay minerals contents will also be analyzed [COLIN 1 OF 4] Extraction of the climatic signal from grain size, clay mineralogy and major elements geochemistry during the Pleistocene in sites 1144 and 1146 (can be split in more than one paper). Colin, C., Trentesaux, A. 16,577A [COLIN 2 OF 4] Diagenetic study of South China Sea sediments. Colin, C., Pagel, M. 16,577A Brief description of work: The objective of this study is to establish the precursor diagenetic process in several sedimentary sequences experiencing different sedimentation rates. Analytical methods employed : X-ray diffraction, observations under electron microscope and cathodoluminescence. [COLIN 3 OF 4] Determinations of the sources of Pleistocene sediments in site 1144. Strontium, Neodymium and Oxygen isotopes investigations on bulk detrital and separate minerals fractions. Colin, C., Pagel, M. 16,577A [LI 1 OF 3] Clastic mineralogy of slope sediments of the South China Sea: Long-term and low-resolution studies and paleoenvironmental implications. Li, Anchun, Chen, L., Yin, X., Jiang, F. 16,565A In collaboration with: L. Shao and X. Li Mineralogical and grain-size analyses of fine-grain (<63µm) clastic component of hemipelagic sediments SCS from Oligocene to Pleistocene from Sites 1143,1146 and 1148, using laser analyzer, XRD, optical and electronic microscopy, and electronic probe. Comparison with surface samples (from previous cruises) and shelf deposits of similar ages (from oil company) of the SCS. Paleoenvironmental interpretations of the results. [LI 2 OF 3] Late Cenozoic provenance geology of the South China Sea slopes: Geochemical and mineralogical approaches Li, Xianhua, LI, Anchun, Shao, Lei, and others 16,582A and 16,565A Long-term low-resolution studies on provenance of terrigenous clasts through 32 million years of the SCS continental slope, based on REE and other elements using ICP-MS and atomic absorption spectrometry, and on minerals using XRD and microscopy (from Sites 1143, 1146 and 1148). Comparison with samples from possible source areas on land, and reconstruction of provenance changes and their correlation with tectonics and paleoclimate. [TRENTESAUX 1 OF 4] Comparison between mineralogical and geochemical data with mineralogical association derived from logging measurement in Site 1144. By Lauer, C., Colin C. and Trentesaux A. 16,586A [ARNOLD 1 OF 1] Comparison of mineralogy from the south china sea and the loess record at Lingtai, China. Arnold, Eve & Ding, Zhongli. 16,557A I will generate a clay mineralogy and grain size record for all of Site 1146 at 10 ka resolution and compare it with the mineralogy form Lingtai. [TRENTESAUX 2 OF 4] Extraction of the climatic signal from grain-size, clay mineralogy and major elements geochemistry during the Pleistocene in Sites 1144 and 1146. Trentesaux, A., Colin C. and PhD student (hopefully also) 16,586A This tittle could correspond to more than one paper (hopefully). [TRENTESAUX 3 OF 4] Provenance studies on the northern slope of the East China Sea from clay mineralogy and Neodynium analysis in Site 1148. Trentesaux, A., Clift P. and coll. [TRENTESAUX 4 OF 4] Clay mineralogy and grain-size analysis in Site 1146. A complete record. Trentesaux, A., Arnold E. and Coll. 16,586A [LI 3 OF 3] Tephrochronology of the South China Sea slope from Oligocene to Pleistocene Li, Xianhua, Shao Lei, Li Anchun, and others 16,582A Establishment of tephrochronological sequence in the South China Sea based on ash layers and dispersed ash grains, using radioactive and geochemical methods. Comparison of mineralogical and chemical composition with possible volcanic source areas. Interpretation of wind transport direction and paleoclimate implications. GEOPHYSICS - BASIN HISTORY [CLIFT 1 OF 1] Oligocene-Recent Erosion History of East Asia recorded by the Nd Isotopes of Detrital Clays in the South China Sea Clift, P., McKnight, A. and Blusztajn, J. 16531A Nd analysis of clays from 1148 and comparison with possible source terrains onshore [CLIFT 2] Working title: Rift Tectonism of the South China Sea Margins constrained by Subsidence Analysis and Heatflow at ODP Leg 184 Drill Sites Clift, P., Kuhnt, W., and Lin, J. [LIN 1 OF 3] Seismic sequence stratigraphy and geophysics of Leg 184 drill sites: Tectonic and paleo-oceanographic implications Jian Lin, Qing-Mou Li, Mark Behn*, Warren Prell, and Pinxin Wang (*Mark Behn is my graduate student at MIT-WHOI and Leg 184 shore-based scientist. He applied but was not selected as a shipboard scientist.) [No sample request] Model synthetic seismograms using logging data; correlate with drill site 1-D seismic stratigraphy and sea level change curves; determine age span and causes of prominent seismic reflectors; analyze 2D and 3D seismic sequence stratigraphy of drill site areas; compile and analyze additional geophysical data to better constrain the tectonic setting of drill sites. [LIN 3 OF 3] Heatflow of Leg 184 drill sites and implications for thermal state and tectonic subsidence of the South China Sea margins Jian Lin, Jennifer Georgen (MIT-WHOI graduate student), and Peter Clift (I will also correspond with Leg 184 organic geochemists.) [NO SAMPLE REQUESTS] Model effects of variable sedimentation rate and calculate heatflow anomalies; compare with existing spotty heatflow data collected by short seafloor probes; explore implications for in situ thermal state and gas stability field of drill sites; use heat flux data in tectonic subsidence analysis. PHYSICAL PROPERTIES OF SEDIMENTS [COLIN 4 OF 4] Comparison between mineralogical and geochemical data with mineralogical association derived from log measurement in site 1144. Colin, C., Lauer, C, Trentesaux, A. 16,577A [LAUER 1 OF 5] Comparison between mineralogical and geochemical data obtained from cores with mineralogical association derived from log measurements. Site 1144 C. Lauer, C. Colin, A. Trenteseaux [LAUER 2 OF 5] Comparison between clay mineralogical data obtained from cores with mineralogical association derived from log measurements. Site 1146 C. Lauer, E. Arnold [LAUER 3 OF 5] Comparison between clay mineralogical data obtained from cores with mineralogical association derived from log measurements. Tectonic implications and structural features from logs and FMS images. Site 1148 C. Lauer, P. Clift, A. Trenteseaux.[LAUER 4 OF 5] Comparison between logs, stratigraphy and geochemical data. Site 1146 C. Lauer, W. Prell, S. Clemens. [LIN 2 OF 3] Modeling Leg 184 logging data: Constraints on lithology, tectonics, and paleo-oceanography of the South China Sea Jian Lin, Qing-Mou Li, and Mark Behn (MIT-WHOI graduate student and Leg 184 shore-based scientist) [NO SAMPLE REQUEST] Develop reference models for individual physical property logs, extract model parameters, and calculate residual anomalies; use model parameters to reveal hole-to-hole variability; conduct multi-variable analysis of residual anomalies to provide constraints on tectonic, sedimentation, and paleo-oceanographic changes. [LI, Q. 1 of 1] Monsoon environmental proxies from logging data of Leg 184 Qing-Mou Li, Jian Lin, and Pinxian Wang Conduct statistical analysis of logging data; analyze monsoon proxies and uncertainties; correlate logging data with monsoon proxy signals (e.g., isotope, etc.); extract monsoon components from logging data; compare Leg 184 data with Indian monsoon signals in the logging data to develop a general model of sediment geophysical property response to monsoonal changes. SYNTHESIS [SHYU 4 OF 4] Biomagnetostratigraphic synthesis of the South China Sea, ODP Leg 184 Jih-Ping Shyu, Zemin Jian, Carlo Laj, Stephen Nathan, Peter Solheid and Xin Su We will synthesize biostratigraphy and magnetostratigrapy based on shipboard and postcruise research results and to calibrate the age of bio- and magnetic events based on the best available time scale, preferably a tuned stable isotope time scale.