MORPHOLOGIES AND TRANSFORMATIONS OF CELESTITE IN SEAWATER - THE ROLE OF ACANTHARIANS IN STRONTIUM AND BARIUM GEOCHEMISTRY

被引：111
作者：
BERNSTEIN, RE
BYRNE, RH
BETZER, PR
GRECO, AM
机构：
[1] Department of Marine Science, University of South Florida, St. Petersburg, FL 33701
来源：
GEOCHIMICA ET COSMOCHIMICA ACTA | 1992年 / 56卷 / 08期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0016-7037(92)90304-2
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：
Free-drifting sediment traps deployed at 400, 1500, and 3200 m were used to collect particles near the US JGOFS Time-Series Station (31-degrees-49,5'N and 64-degrees-08.2'W) in the Atlantic Ocean. Acantharian specimens isolated from our samples were abundant at the 400-m depth horizon and were rare to non-existent in our 1500-m traps. No specimens were detected in the 3200-m traps. This trend parallels those noted for the Pacific and has been linked to the oceans' Sr/Cl profiles. Our collections revealed the presence of myriad, heretofore undocumented, minute SrSO4 particles. These particles are most likely related to the acantharian reproductive cycle. The extreme abundance of acantharians and acantharian-derived particles may have implications beyond the oceans' Sr budgets. Barium/strontium molar ratios in acantharian-derived celestite on the order of 3 X 10(-3) indicate that acantharians may play an important role in oceanic Ba cycling.
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页码：3273 / 3279
页数：7
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