About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

Earth Science Bulletin (WGA)

Abstract


Earth Science Bulletin
Vol. 9 (1976), No. 1. (March), Pages 1-7

Mineral Profile of Wyoming’s Green River Formation –Oil Shales Sampled by Blacks Fork Core1

William A. Robb, John Ward Smith

Abstract

Stratigraphic relationships of minerals and organic matter in the trona-bearing lower Wilkins Peak Member and the Tipton Shale Member of Wyoming’s Green River Formation are presented as histogram plots with depth. Oil yields and X-ray diffraction peak heights of 17 minerals are presented for samples from an oil-shale core drilled near the depositional axis of the Green River Basin. The mineral and oil-yield profiles picture graphically a remarkable lacustrine sedimentary sequence involving the deposition of hydrogen-rich organic matter in oil shale and the development of sodium carbonate minerals. The emphatic difference in mineralogy between the Tipton Shale and the Wilkins Peak Members is evaluated. In addition, the major occurrence of the mineral nahcolite (NaHCO3) heretofore noted only as a single trace in Wyoming’s Green River Formation is reported.


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