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
Pore Space Reduction in Cretaceous Sandstones through Chemical Precipitation of Clay Minerals
William R. Almon (2), Larry B. Fullerton (3), David K. Davies
ABSTRACT
Volcaniclastic sandstones from the Upper Cretaceous Horsethief Formation, Montana, are characterized by two distinct cement assemblages; (1) Corrensite ± Calcite ± Dolomite, which is restricted to samples from delta distributary channel and distributary mouth bar environments, and (2) Montmorillonite ± Calcite, which characterizes bay-beach, crevasse splay, lagoon, barrier island, and shallow subtidal environments. Petrographic, microprobe, scanning electron microscope, and fluid inclusion analyses indicate the early stage origin of these assemblages as authigenic chemical precipitates. In Horsethief volcaniclastics, pore-space reduction by precipitation of the clay minerals corrensite and montmorillonite reflects the chemistry of early stage pore-fluids, and does not involve syn- or post-depositional introduction of detrital clays.
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 |