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Book Chapter

Oils and Source Rocks of Niagaran Reefs (Silurian) in the Michigan Basin

By
W. C. Gardner
W. C. Gardner
Mobil Research Development Corporation, Dallas, TexasPresent address: Mobil Oil Indonesia, Post Bag 400, Jakarta Pusat, Jakarta, Indonesia.
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E. E. Bray
E. E. Bray
Mobil Research Development Corporation, Dallas, TexasPresent address (retired): P.O. Box 277, Cedar Hill, Texas 75104
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Published:
January 01, 1984

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 the 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 precipitate calcium sulfate.

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Contents

AAPG Studies in Geology

Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks

James G. Palacas
James G. Palacas
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American Association of Petroleum Geologists
Volume
18
ISBN electronic:
9781629811642
Publication date:
January 01, 1984

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