Cenozoic deep-sea temperatures and global ice volumes from Mg/Ca in benthic foraminiferal calcite

被引：832

作者：

Lear, CH ^{[1
]}

Elderfield, H ^{[1
]}

Wilson, PA ^{[1
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

来源：

SCIENCE | 2000年 / 287卷 / 5451期

关键词：

D O I：

10.1126/science.287.5451.269

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A deep-sea temperature record for the past 50 million years has been produced from the magnesium/calcium ratio (Mg/Ca) in benthic foraminiferal calcite. The record is strikingly similar in form to the corresponding benthic oxygen isotope (delta(18)O) record and defines an overall cooling of about 12 degrees C in the deep oceans with four main cooling periods. Used in conjunction with the benthic delta(18)O record, the magnesium temperature record indicates that the first major accumulation of Antarctic ice occurred rapidly in the earliest Oligocene (34 million years ago) and was not accompanied by a decrease in deep-sea temperatures.

引用

页码：269 / 272

页数：4

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