Authigenic carbonate formation in the ocean

被引：88

作者：

Lein, AY ^{[1
]}

机构：

[1] Russian Acad Sci, Shirshov Inst Oceanol, Moscow 117997, Russia

来源：

LITHOLOGY AND MINERAL RESOURCES | 2004年 / 39卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1023/B:LIMI.0000010767.52720.8f

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：

Oceanic authiaenic carbonates are classified according to the origin of carbonate carbon source using a complex methodology that includes methods of sedimentary petrography, mineralogy, isotope geochemistry, and microbiology. Mg-calcite (proto-dolomite) and aragonite predominate among the authipenic carbonates. All authigenic carbonates are depleted in heavy carbon isotope 13 C and enriched in heavy oxygen isotope O-18 (in PDB system), indicating biological fractionation of isotopes during the carbonate formation. Results obtained show that authigenic carbonate formation is a biogeochemical (microbial) process, which involves carbon from ancient sedimentary rocks, abiogenic methane, and bicarbonate-ion of hydrothermal fluids into the modern carbon cycle.

引用

页码：1 / 30

页数：30

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