About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 55 (1985)No. 4. (July), Pages 541-547

Diagenetic Clay Mineral Composition as a Function of Pressure, Temperature, and Chemical Activity

B. Velde, E. Nicot

ABSTRACT

Electron microprobe analyses are made together with X-ray-diffraction determinations of diagenetic mixed-Previous HitlayerNext Hit clays, which have an R3-type structure and are found in two Jurassic sandstone units of the North Sea Viking graben. Higher and more variable smectite content (2-12%) of more deeply buried layers is attributed to differences in pressure or fluid composition during crystallization (diagenesis). Neither temperature nor whole-rock composition seems to have been responsible for the differences in mineralogy found. It is necessary to consider not only the possible effects of temperature on clay-mineral solid-solution series such as the illite/smectite mixed-Previous HitlayerTop clay but also those of pressure (lithostatic versus hydrostatic) and aqueous solution composition.


Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Watermarked PDF Document: $14
Open PDF Document: $24