Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite-Reference-Cited by-同舟云学术

Cenozoic Deep-Sea Temperatures and Global Ice Volumes from Mg/Ca in Benthic Foraminiferal Calcite

Published:2000-01-14 Issue:5451 Volume:287 Page:269-272
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Lear C. H.¹,Elderfield H.¹,Wilson P. A.¹

Affiliation:

1. Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK.

Abstract

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 (δ 18 O) record and defines an overall cooling of about 12°C in the deep oceans with four main cooling periods. Used in conjunction with the benthic δ 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference52 articles.

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4. Paleogene stable isotope events

5. Evolution of Early Cenozoic marine temperatures

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