About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Ankerite in the Green River Formation's Mahogany Zone
John Ward Smith, William A. Robb
ABSTRACT
Ankerite, a dolomite altered by isomorphous cation substitution, is the primary carbonate mineral in Mahogany Zone oil shales of the Green River Formation in Colorado and Utah. X-ray diffraction spacings determined on 10 composite samples representing the zone over a broad geographic area are shifted from those of unsubstituted dolomite to spacings very similar to an ankerite. Substitution of Fe++ for Mg++ in these samples was insufficient to account for the large shifts detected. Isomorphous substitution of Sr++ for Ca++, suggested as contributing to the shift in spacing, was strongly supported by correlation significant to more than 99 percent between d104 spacing shift and the proportions of substitution of Fe++ for g++ and Sr++ for Ca++ in these samples.
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 |