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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract


Pub. Id: A030 (1984)

First Page: 33

Last Page: 44

Book Title: SG 18: Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks

Article/Chapter: Oils and Source Rocks of Niagaran Reefs (Silurian) in the Michigan Basin

Subject Group: Geochemistry, Generation, Migration

Spec. Pub. Type: Studies in Geology

Pub. Year: 1984

Author(s): W. C. Gardner (1), E. E. Bray (2)

Abstract:

Potential source rocks were selected from some 300 Silurian core samples by measurements of total organic carbon. Characterization of 60 Michigan basin oils by use of infrared-absorption spectra and carbon-isotope data indicates that he group of oils produced from Niagaran reefs are unique and distinct from other oils in the Michigan basin. Correlation of the oils with potential source-rock kerogen by use of carbon-isotope data indicates that carbonaceous, laminated, interreef Salina A-1 carbonates are the principal source rocks, with the upper algal or "Brown Niagaran" facies of the reef itself constituting a subordinate source. Both facies were deposited in a mesosaline environment, i.e., in waters more saline than normal marine but insufficiently concentrated to precip tate calcium sulfate.

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