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Advances in Earth Science  1995, Vol. 10 Issue (3): 263-266    DOI: 10.11867/j.issn.1001-8166.1995.03.0263
Articles     
ODP AND GLOBAL CHANGES(I)—THE ANTARCTICA CLIMATE EVOLUTION DURING THE LATEST PHANEROZOIC AND ITS GLOBAL INFLUENCE
Mao Shaozhi
China University of Geosciences, Beijing  100083
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Abstract  

This article introduces a "current theory" represented by famous American paleoceanologist J. P. Kennett and expounds principal findings made by about 10 legs of Ocean Drilling Program (and its predecessor Deep Sea Drilling Project) investigations for the last 25 years concerning the Antarctic climate history during the latest Phanerozoic. The Antarctica was warm and ice-free during Late Cretaceous. The marked cooling occurred close to the end of Late Cretaceous accompanied with a mass extinction, then followed by a warming trend starting 0. 1 Ma after the K/T boundary,leading to the climate of Cenozoic warmth during the early to middle Eocene with the surface water temperature 15~16℃,even up to 20℃ and the bottom water temperature 12~14℃.After that important cooling steps occurred near the Eocene/Oligocene boundary, throughout the Oligocene, the middle-late Miocene,and the latest Miocene-earliest Pliocene. The cryospheric development commenced on East Amtarctica at the beginning of the Oligocene and the Antarctic continent was significantly "glaciated" during the Oligocene. Hence, the most important development was the formation of the West Antarctica ice-sheet during the late Miocene .The Antarctic ice-sheet was finally and stably formed in the latest Miocene-earliest Pliocene. Being probably induced by the opening of the Drake Strait, the formation of the Antarctic Circular Current(ACC) and Antarctic Bottom Water(AABW). All of these may give significant influence on the establishment of present global climate framework.

Key words:  Ocean Drilling Program      Ice-sheet      Antarctic circular current(ACC)      Antarctic bottom water(AABW).     
Received:  21 February 1995      Published:  01 June 1995
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Cite this article: 

Mao Shaozhi. ODP AND GLOBAL CHANGES(I)—THE ANTARCTICA CLIMATE EVOLUTION DURING THE LATEST PHANEROZOIC AND ITS GLOBAL INFLUENCE. Advances in Earth Science, 1995, 10(3): 263-266.

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http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.1995.03.0263     OR     http://www.adearth.ac.cn/EN/Y1995/V10/I3/263

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[3] Mao S, Mohr B A R. Late Cretaceous dinoflagellate cysts(? Santonian Maestrichtian) from the southern Indian Ocean (Hole 748C). Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program)120(Part 1). 1990. 307-341.
[4] Shackleton V J,Kennett J P. Paleotemperature history of the Cenozoic and the initiation of Antarctic glaciation: Oxygen and carbon isotope analyses in DSDP sites 277, 279 and 281. In:Kennett J P,Houtz R E et al. Initial Reports DSDP 29.Washington(US Government Printing Office). 1975. 143-756.

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