Authigenic carbonates in sediments from the Gulf of Mexico

Details Authigenic carbonates in sediments from the Gulf of Mexico Authigenic carbonates in sediments from the Gulf of Mexico

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..88..263b&link_type=abstract

Earth and Planetary Science Letters, Volume 88, Issue 3-4, p. 263-272.

Computer Science

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Scientific paper

The carbon isotopic composition of diagenetic dolomite and calcite in some sediments of the Gulf of Mexico varies between ``normal-marine'' (δ13C ca. 0‰) and -14.6‰ which suggests that biogenic CO2 contributed to the carbonate formation. The δ13O values of dolomite and coexisting calcite are very similar but variable down-core.
Dolomite and calcite precipitated early from pore water where SO42- was not reduced. However, during (and after?) SO42- reduction dolomite and calcite still formed and there are at least two generations of carbonate minerals present.

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