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
Early Diagenetic Dolomite Cements: Examples from the Permian Lower Magnesian Limestone of England and the Pleistocene Carbonates of the Bahamas
John Kaldi (2), June Gidman
ABSTRACT
Early diagenetic dolomite cements are found in the Permian Lower Magnesian Limestone of eastern England and the Pleistocene carbonates of Great Abaco Island, Bahamas. In the Lower Magnesian Limestone the dolospar occurs as isopachous rinds that have grown both centripetally and centrifugally on the dolomitized micrite envelopes of hollow-centered allochems. Because compactional fractures penetrate both the allochem walls and the cement rinds, dolomite cementation is inferred to have predated any significant sediment accumulation. In the Great Abaco carbonates, limpid dolomite forms isopachous rinds around inter- and intragranular porosity, and is postdated by meteoric calcite cement.
Both examples of early diagenetic dolomite cement textures developed as a consequence of changes in pore-fluid chemistry from marine, to mixed meteoric-marine, to meteoric waters. Therefore, the presence of this cement type may point toward aliagenetic environments resulting from marine regressions.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
| Watermarked PDF Document: $16 | |
| Open PDF Document: $28 |