Shatsky Rise, a medium-sized large igneous province in the west Central Pacific Ocean, has three main topographic highs that preserve a thick sedimentary record from Cretaceous through Cenozoic. During Ocean Drilling Program (ODP) Leg 198 to Shatsky Rise, a total of ~768 m of late Miocene–Holocene sediments was recovered from six sites. Sites 1207 and 1208 were drilled on the Northern and Central Highs, respectively, and yielded expanded late Miocene–Holocene sequences. Sites 1209, 1210, 1211, and 1212 were drilled on the Southern High and yielded shorter sequences of similar age. Clearly interpretable magnetic stratigraphies were obtained from all sites using the shipboard pass-through magnetometer. These results were augmented using discrete sample cubes (7 cm3) collected shipboard and measured postcruise. Miocene age sediments are separated by a hiatus from Oligocene, Eocene, and Cretaceous age sediments beneath. An astrochronological age model was developed for the six sites based on cycles observed in reflectance data, measured shipboard. This age model is in good agreement with published astrochronological polarity chron ages in the 1- to 6-Ma interval.
1Evans, H.F., Channell, J.E.T., and Sager, W.W., 2005. Late Miocene–Holocene magnetic polarity stratigraphy and astrochronology, ODP Leg 198, Shatsky Rise. In Bralower, T.J., Premoli Silva, I., and Malone, M.J. (Eds.), Proc. ODP, Sci. Results, 198 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/198_SR/118/118.htm>. [Cited YYYY-MM-DD]
2Department of Geological Sciences, University of Florida, Gainesville FL 32611, USA. Correspondence author: email@example.com
3Department of Oceanography, Texas A&M University, College Station TX 77843, USA.
Initial receipt: 25 September 2004
Acceptance: 25 February 2005
Web publication: 31 August 2005