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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 13 (1929)

Issue: 10. (October)

First Page: 1377

Last Page: 1386

Title: Significance of Micro-Crystals of Carbonates in Bituminous Shales. A Preliminary Note

Author(s): Jun-Ichi R. Takahashi (2)


Extremely minute crystals of carbonates are found embedded in the matrices of the Fushun shales. They are also found, in varying degree, in the oil shales from Colorado, Scotland, and elsewhere. A preliminary investigation reveals that those occurring in shales of terrestrial origin are mostly sideritic, and those in the marine kerogen shales are largely dolomitic.

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