| Abstract: | The majority of the dolomite consists of a finely crystalline groundmass of dolomicrospar and, less commonly, dolomicrite. Glaebules, irregular spar-filled cracks, spheroidal dolomite, silificiation and vuggy porosity are locally abundant in the massive dolomite. In contrast, biologically induced micromorphological features such as rhizocretions and alveolar-septal fabrics were observed in the thin, nodular dolomite beds. Petrographic observations argue in favour of primary (proto)dolomite precipitation, although early diagenetic replacement of calcite by (proto)dolomite cannot be ruled out. Strontium and carbon isotope data of early diagenetic dolocrete cements and oxygen isotope data of early diagenetic silica indicate an entirely non-marine, continental origin for the groundwaters. -from Authors |
| Genre: | Article |
| ProdID: | 70016792 |
| Citation Author: | Spotl, S.; Wright, V. P. |
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| Citation End Page: | 1136 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Sedimentology |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Groundwater dolocretes from the Upper Triassic of the Paris Basin, France: a case study of an arid, continental diagenetic facies; 1992; Article; Journal; Sedimentology; Spotl, S.; Wright, V. P. |
| Citation Start Page: | 1119 |
| Citation Volume: | 39 |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Groundwater dolocretes from the Upper Triassic of the Paris Basin, France: a case study of an arid, continental diagenetic facies; 1992; Article; Journal; Sedimentology; Spotl, S.; Wright, V. P. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1992 00:00 -0600 |
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