Title Expedition 318 summary
Author Brinkhuis, H.; Escutia, C.; Klaus, A.; Fehr, A.; Williams, T.; Bendle, J.A.P.; Bijl, P.K.; Bohaty, S.M.; Carr, S.A.; Dunbar, R.B.; Flores, J.; Gonzàlez, J.J.; Hayden, T.G.; Iwai, M.; Jimenez-Espejo, F.J.; Katsuki, K.; Kong, G.S.; McKay, R.M.; Nakai, M.; Olney, M.P.; Passchier, S.; Pekar, S.F.; Pross, J.; Riesselman, C.R.; Röhl, U.; Sakai, T.; Salzmann, U.; Shrivastava, P.K.; Stickley, C.E.; Sugisaki, S.; Tauxe, L.; Tuo Shouting; van de Flierdt, T.; Welsh, K.; Yamane, M.; Integrated Ocean Drilling Program, Expedition 318 Scientists, College Station, TX
Author Affil Brinkhuis, H., Utrecht University, Institute of Environmental Biology, Utrecht, Netherlands. Other: CSIC, Instituto Andaluz de Ciencias de la Tierra, Spain; Integrated Ocean Drilling Program; RWTH Aachen University, Germany; Lamont- Doherty Earth Observatory; University of Glasgow, United Kingdom; University of Southampton, United Kingdom; Colorado School of Mines; Stanford University; Universidad de Salamanca, Spain; Western Michigan University; Kochi University, Japan; Japan Agency for Marine-Earth Science and Technology, Japan; Korea Institute of Geoscience and Mineral Resources, South Korea; Victoria University of Wellington, New Zealand; Daito Bunka University, Japan; University of South Florida-Tampa; Montclair State University; CUNY, Queens College; University of Frankfurt, Germany; University of Bremen, Germany; Utsunomiya University, Japan; Northumbria University, United Kingdom; Geological Survey of India, India; University of Tromso, Norway; Graduate University of Advanced Study, Japan; Scripps Institution of Oceanography; Tongji University, China; Imperial College London, United Kingdom; University of Queensland, Australia; University of Tokyo, Japan; CSIC, Instituto Andaluz de Ciencias de la Tierra, Spain; Integrated Ocean Drilling Program; RWTH Aachen University, Germany
Source Proceedings of the Integrated Ocean Drilling Program; Wilkes Land glacial history; Expedition 318 of the riserless drilling platform; Wellington, New Zealand, to Hobart, Australia; sites U1355-U1361, 3 January-8 March 2010, H. Brinkhuis, C. Escutia, A. Klaus, A. Fehr, T. Williams, J.A.P. Bendle, P.K. Bijl, S.M. Bohaty, S.A. Carr, R.B. Dunbar, J. Flores, J.J. Gonzàlez, T.G. Hayden, M. Iwai, F.J. Jimenez-Espejo, K. Katsuki, G.S. Kong, R.M. McKay, M. Nakai, M.P. Olney, S. Passchier, S.F. Pekar, J. Pross, C.R. Riesselman, U. Röhl, T. Sakai, U. Salzmann, P.K. Shrivastava, C.E. Stickley, S. Sugisaki, L. Tauxe, Tuo Shouting, T. van de Flierdt, K. Welsh and M. Yamane; Integrated Ocean Drilling Program, Expedition 318 scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program, Vol.318, 59p. Publisher: IODP Management International, Washington, DC, United States. ISSN: 1930-1014
Publication Date 2010
Notes In English. 145 refs. GeoRef Acc. No: 308362. CRREL Acc. No: 65005822
Index Terms algae; climatic change; profiles; geophysical surveys; glaciation; paleoclimatology; seismic surveys; surveys; Antarctica--East Antarctic ice sheet; Antarctica--East Antarctica; Integrated Ocean Drilling Program--Expedition 318; Southern Ocean; Antarctica--Wilkes Land; Antarctic ice sheet; Antarctica; biostratigraphy; Cenozoic; chemostratigraphy; climate change; continental margin; cores; deglaciation; diatoms; Dinoflagellata; East Antarctic ice sheet; East Antarctica; Expedition 318; Foraminifera; geophysical methods; geophysical profiles; Integrated Ocean Drilling Program; Invertebrata; lithofacies; magnetostratigraphy; microfossils; nannofossils; paleoenvironment; paleomagnetism; palynomorphs; Plantae; Protista; Quaternary; Radiolaria; reconstruction; sea-level changes; sedimentary rocks; seismic methods; seismic profiles; seismic stratigraphy; stratigraphic units; Tertiary; unconformities; Wilkes Land
Abstract Understanding the evolution and dynamics of the Antarctic cryosphere, from its inception during the Eocene-Oligocene transition (~34 Ma) through the significant subsequent periods of likely coupled climate and atmospheric greenhouse gas changes, is not only of major scientific interest but also is of great importance for society. Drilling the Antarctic Wilkes Land margin along an inshore to offshore transect was designed to provide a long-term record of the sedimentary archives of Cenozoic Antarctic glaciation and its intimate relationships with global climatic and oceanographic change. The principal goals were 1. To establish the timing and nature of the first arrival of ice at the Wilkes Land margin inferred to have occurred during the earliest Oligocene (reflecting Oligocene isotope Event 1 around ~34 Ma), 2. To reconstruct the nature and age of the changes in the geometry of the progradational wedge interpreted to correspond with large fluctuations in the extent of the East Antarctic Ice Sheet and possibly coinciding with the transition from a wetbased to a cold-based glacial regime, 3. To obtain a high-resolution record of Antarctic climate variability during the late Neogene and Quaternary, and 4. To obtain an unprecedented ultrahigh resolution (i.e., annual to decadal) Holocene record of climate variability. The Wilkes Land drilling program was developed to constrain the age, nature, and paleoenvironment of deposition of the previously only seismically inferred glacial sequences. Drilling the Wilkes Land margin has a unique advantage in that seismic unconformity WL-U3, inferred to separate preglacial strata below from glacial strata above in the continental shelf, can be traced to the continental rise deposits, allowing sequences to be linked from shelf to rise. Integrated Ocean Drilling Program Expedition 318, carried out in January-March 2010 (Wellington, New Zealand, to Hobart, Australia), recovered ~2000 m of high-quality middle Eocene-Holocene sediments from Sites U1355, U1356, U1359, and U1361 on the Wilkes Land rise and Sites U1357, U1358, and U1360 on the Wilkes Land shelf at water depths between ~400 and 4000 meters below sea level. Together, the cores represent ~53 m.y. of Antarctic history. Recovered cores successfully date the inferred glacial seismic units (WL-S4-WL-S9). The cores reveal the history of the Wilkes Land Antarctic margin from an ice-free "greenhouse Antarctica", to the first cooling, to the onset and erosional consequences of the first glaciation and the subsequent dynamics of the waxing and waning ice sheets, all the way to thick, unprecedented "tree ring style" records with seasonal resolution of the last deglaciation that began ~10,000 y ago.
URL http://hdl.handle.net/10.2204/iodp.proc.318.101.2011
Publication Type journal article
Record ID 91085