THE RECORD OF SEA-WATER OS-187/OS-186 VARIATION THROUGH THE CENOZOIC

被引：133

作者：

PEGRAM, WJ

KRISHNASWAMI, S

RAVIZZA, GE

TUREKIAN, KK

机构：

[1] YALE UNIV,DEPT GEOL & GEOPHYS,KILNE GEOL LAB,POB 6666,NEW HAVEN,CT 06511

[2] YALE UNIV,CTR STUDY GLOBAL CHANGE,NEW HAVEN,CT 06511

[3] WOODS HOLE OCEANOG INST,WOODS HOLE,MA 02543

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 1992年 / 113卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0012-821X(92)90132-F

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The variation of sea water Os-187/Os-186 during the Cenozoic has been determined by analyzing the hydrogenous Os released by acidic hydrogen peroxide leaching of layers in an abyssal North Pacific pelagic clay core. Overall, sea water Os-187/Os-186 has increased from 3.2 at 58 Ma to the present-day value of approximately 8.6. This pattern is similar to the well-known Sr-87/Sr-86 evolution of sea water. The increase in the proportion of continental OS (Os-187/Os-186 greater-than-or-equal-to 10) could be due to enhanced weathering rates of black shales associated with the uplift of the Himalayas. Other elements associated with black shale weathering, such as U and P, should show effects in the sedimentary record.

引用

页码：569 / 576

页数：8

共 33 条

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