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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 42 (1972)No. 2. (June), Pages 350-355

Shale Petrology by Electron Microprobe: Pyrite-Chlorite Relations

Raymond Siever, Miriam Kastner (2)

ABSTRACT

Polished thin sections of several fine-grained shales were studied with an electron probe X-ray analyzer in order to map mineralogy and textures not resolvable by microscopy or X-ray Previous HitdiffractionNext Hit. An example of the power of this analysis is the discovery of a close textural association between a Mg-Fe clay mineral and pyrite in two representative shales, the Levis (Ordovician, Quebec) and Newark Series (Triassic, New Jersey). The geochemistry of this diagenetic pair is related to Fe-Mg exchange in clay associated with sulfate reduction. Chemical, X-ray Previous HitdiffractionNext Hit, and electron microprobe analyses are compared.


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