IODP Expedition 318; from greenhouse to icehouse at the Wilkes Land Antarctic margin

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doi: 10.2204/
Author(s): Escutia, Carlota; Brinkhuis, Henk; Klaus, Adam; Bendle, J. A. P.; Bijl, P. K.; Bohaty, S. M.; Carr, S. A.; Dunbar, R. B.; González, J. J.; Fehr, A.; Hayden, T. G.; Iwai, M.; Jiménez-Espejo, Francisco J.; Katsuki, K.; Kong, G. S.; McKay, R. M.; Nakai, M.; Olney, M. P.; Passchier, S.; Pekar, S. F.; Pross, J.; Riesselman, C.; Röhl, U.; Sakai, T.; Shrivastava, P. K.; Stickley, C. E.; Sugisaki, S.; Tauxe, L.; Tuo, S.; van de Flierdt, T.; Welsh, K.; Williams, T.; Yamane, M.
Integrated Ocean Drilling Program, Expedition 318 Scientists, College Station, TX
Author Affiliation(s): Primary:
Universidad de Granada, Instituto Andaluz de Ciencias de la Tierra, Granada, Spain
Utrecht University, Netherlands
Texas A&M University, United States
Volume Title: Scientific Drilling
Source: Scientific Drilling, Vol.12, p.15-23. Publisher: Integrated Ocean Drilling Program Management International, Sapporo; Washington, DC, International. ISSN: 1816-8957
Note: In English. 24 refs.; illus., incl. sects., sketch map
Summary: Integrated Ocean Drilling Program (IODP) Expedition 318, Wilkes Land Glacial History, drilled a transect of sites across the Wilkes Land margin of Antarctica 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 Wilkes Land drilling program was undertaken to constrain the age, nature, and paleoenvironment of the previously only seismically inferred glacial sequences. The expedition (January-March 2010) recovered ∼2000 meters of high-quality middle Eocene-Holocene sediments from water depths between 400 m and 4000 m at four sites on the Wilkes Land rise (U1355, U1356, U1359, and U1361) and three sites on the Wilkes Land shelf (U1357, U1358, and U1360). These records span ∼53 million years of Antarctic history, and the various seismic units (WL-S4-WL-S9) have been successfully dated. 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. The cores also reveal details of the tectonic history of the Australo-Antarctic Gulf from 53 Ma, portraying the onset of the second phase of rifting between Australia and Antarctica, to ever-subsiding margins and deepening, to the present continental and ever-widening ocean/continent configuration.
Year of Publication: 2011
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Antarctica; Biostratigraphy; Boreholes; Cenozoic; Chronostratigraphy; Continental margin; Cores; Diatoms; Expedition 318; Foraminifera; Glacial environment; IODP Site U1355; IODP Site U1356; IODP Site U1357; IODP Site U1358; IODP Site U1359; IODP Site U1360; IODP Site U1361; Integrated Ocean Drilling Program; Invertebrata; Lithostratigraphy; Marine sediments; Microfossils; Nannofossils; Paleo-oceanography; Paleoclimatology; Paleoenvironment; Plantae; Protista; Quaternary; Radiolaria; Sediments; Southern Ocean; Tertiary; Unconformities; Well logs; Wilkes Land
Coordinates: S663000 S631500 E1440000 E1354500
Record ID: 2012014163
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