Paleoenvironments in the Weddell Sea area and Antarctic climates, as deduced from clay mineral associations and geochemical data, ODP Leg 113

Online Access: Get full text
doi: 10.2973/odp.proc.sr.113.151.1990
Author(s): Robert, Christian M.; Maillot, Henri
Author Affiliation(s): Primary:
CNRS-Univ. Nice, Inst. Geodynam., Nice, France
Other:
Univ. R.I. at Narragansett, United States
Ocean Drilling Program, United States
Tex. A&M Univ., United States
Lamont-Doherty Geol. Obs., United States
Univ. Oslo, Norway
Alfred Wegener Inst. Polar and Ocean Res., Federal Republic of Germany
Univ. Southampton, United Kingdom
Univ. Tex. at Austin, United States
Woods Hole Oceanogr. Inst., United States
Fed. Inst. Tech., Switzerland
Univ. Tokyo, Japan
Mem. Univ. Newfoundland, Canada
CNRS-Luminy, France
R. Ont. Mus., Canada
Univ. Bremen, Federal Republic of Germany
Wesleyan Univ., United States
Fla. State Univ., United States
Univ. Lille, France
Volume Title: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987
Volume Author(s): Barker, Peter F.; Kennett, James P.; O'Connell, Suzanne B.; Berkowitz, Stephen; Bryant, William R.; Burckle, Lloyd H.; Egeberg, Per Kristian; Fütterer, Dieter Karl; Gersonde, Rainer Erich; Golovchenko, Xenia; Hamilton, Norman; Lawver, Lawrence; Lazarus, David B.; Lonsdale, Malcolm J.; Mohr, Barbara A. R.; Nagao, Toshiyasu; Pereira, Christopher P. G.; Pudsey, Carol J.; Robert, Christian M.; Schandl, Eva S.; Spiess, Volkhard; Stott, Lowell D.; Thomas, Ellen; Thompson, Keith F. M.; Wise, Sherwood W., Jr.; Kennett, Diana M.; Masterson, Amanda; Stewart, Norman J.
Source: Proceedings of the Ocean Drilling Program, Weddell Sea, Antarctica, covering Leg 113 of the cruises of the Drilling Vessel JOIDES Resolution, Valparaiso, Chile, to East Cove, Falkland Islands, sites 689-697, 25 December 1986-11 March 1987, Peter F. Barker, James P. Kennett, Suzanne B. O'Connell, Stephen Berkowitz, William R. Bryant, Lloyd H. Burckle, Per Kristian Egeberg, Dieter Karl Fütterer, Rainer Erich Gersonde, Xenia Golovchenko, Norman Hamilton, Lawrence Lawver, David B. Lazarus, Malcolm J. Lonsdale, Barbara A. R. Mohr, Toshiyasu Nagao, Christopher P. G. Pereira, Carol J. Pudsey, Christian M. Robert, Eva S. Schandl, Volkhard Spiess, Lowell D. Stott, Ellen Thomas, Keith F. M. Thompson, Sherwood W. Wise, Jr., Diana M. Kennett, Amanda Masterson and Norman J. Stewart. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.113, p.51-70. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 54 refs.; illus. incl. 2 tables, 4 plates, sketch map
Summary: Clay particles in the Weddell Sea are mainly of detrital origin, eroded from soils as well as parent-rocks and ancient sediments. Contribution from volcanism is minor, and restricted to Early Cretaceous sediments on the Queen Maud Land continental margin, and to Late Cretaceous through early Paleocene deposits on Maud Rise. Generally, weak diagenetic processes are reflected mainly by recrystallization of smectite particles. Clay mineral and inorganic geochemical data provide information about the evolution of continental climate and oceanic circulation in antarctic areas adjacent to the Weddell Sea. Globally warm climates and alternating wet and arid periods prevailed in Antarctica during the Cretaceous and early Paleogene. By early Oligocene, cold climatic conditions inhibited pedogenesis in East Antarctica. Similar conditions extended to West Antarctica during the middle Miocene, when widening and deepening of the Drake Passage and Scotia Sea completed the thermal isolation of Antarctica. An important influence of Antarctic Water circulation on clay sedimentation is apparent since middle Miocene off East Antarctica and early Pliocene off West Antarctica. (Auth. mod.)
Year of Publication: 1990
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Antarctic Ocean; Applications; Areal studies; Cenozoic; Clay mineralogy; Clay minerals; Cretaceous; Detritus; Evolution; Geochemistry; Leg 113; Mesozoic; Minerals; Ocean Drilling Program; Paleoclimatology; Paleoenvironment; Paleogene; Reconstruction; Sheet silicates; Silicates; Smectite; Southern Ocean; Stratigraphy; Tertiary; Weddell Sea
Coordinates: S704954 S614837 E0030559 W0432706
Record ID: 1991051146
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States