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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 29 (1945)

Issue: 10. (October)

First Page: 1470

Last Page: 1493

Title: Relation of Radioactivity, Organic Content, and Sedimentation

Author(s): Wilham L. Russell (2)

Abstract:

A comparison between the radioactivity and organic content of 510 samples of sedimentary rocks indicates a marked relation between certain types of organic content and radioactivity. Marine oil shales are associated with exceptionally high radioactivity, coals with abnormally low radioactivity, and other types of organic matter with intermediate radioactivities. An analysis of the material balance between sedimentary and igneous rocks indicates that the sediments should have about the same radioactivity as the igneous rocks from which they were derived; the averages of the writer's tests seem to confirm this conclusion if the igneous source of the sediments resembles a granite. An analysis of the data bearing on the radioactivity of deep-sea deposits and oil shales indica es no evidence of a general increase in radioactivity with slowness of deposition. The bearing of the new data on the origin of oil and of the helium in natural gas is discussed.

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