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The role of minerals in the thermal alteration of organic matter. III - Generation of bitumen in laboratory experimentsA series of pyrolysis experiments, utilizing two different immature kerogens (from the Monterey and Green River Formations) mixed with common sedimentary minerals (calcite, illite, or Na-montmorillonite), was conducted to study the impact of the mineral matrix on the bitumen that was generated. Calcite has no significant influence on the thermal evolution of bitumen and also shows virtually no adsorption capacity for any of the pyrolysate. In contrast, montmorillonite (M) and illite, to a lesser extent, alter bitumen during dry pyrolysis. M and illite also display strong adsorption capacities for the polar constituents of bitumen. By this process, hydrocarbons are substantially concentrated within the pyrolysate that is not strongly adsorbed on the clay matrices. The effects of the clay minerals are significantly reduced during hydrous pyrolysis. The strong adsorption capacities of M and illite, as well as their thermocatalytic properties, may in part explain why light oils and gases are generated from certain argillaceous source-rock assemblages, whereas heavy immature oils are often derived from carbonate source rocks.
Document ID
19880045617
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Huizinga, Bradley J.
(California Univ. Los Angeles, CA, United States)
Tannenbaum, Eli
(California Univ. Los Angeles, CA, United States)
Kaplan, I. R.
(California, University Los Angeles, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Organic Geochemistry
Volume: 11
Issue: 6 19
ISSN: 0146-6380
Subject Category
Geophysics
Accession Number
88A32844
Funding Number(s)
CONTRACT_GRANT: NGR-05-007-221
Distribution Limits
Public
Copyright
Other

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