Zinc concentrations in benthic foraminifera reflect seawater chemistry

被引：102

作者：

Marchitto, TM ^{[1
]}

Curry, WB ^{[1
]}

Oppo, DW ^{[1
]}

机构：

[1] MIT, Woods Hole Oceanog Inst, Joint Program Oceanog, Woods Hole, MA 02543 USA

来源：

PALEOCEANOGRAPHY | 2000年 / 15卷 / 03期

关键词：

D O I：

10.1029/1999PA000420

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We have measured Zn/Ca ratios in two taxa of Holocene-aged benthic foraminifera from throughout the world's oceans. Zn/Ca is controlled by bottom water dissolved Zn concentration and, like Cd/Ca and Ba/Ca, by bottom water saturation state with respect to calcite. Measurements on "live-collected" foraminifera suggest that the saturation effect occurs during growth and is not a postdepositional artifact. Zn/Ca could be a sensitive paleoceanographic tracer because deep water masses have characteristic Zn concentrations that increase about tenfold from the deep North Atlantic to the deep North Pacific. In addition, since Zn/Ca responds to a different range of saturation states than Cd/Ca, the two may be used together to evaluate changes in deep water carbonate ion (CO32-) concentration.

引用

页码：299 / 306

页数：8

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