| Abstract: | Palaeomagnetic dating techniques have been applied to determine the age of fluid migration that produced the Mississippi Valley-type (MVT) Pb-Zn-Ba-F deposits in the Ce??vennes region of southern France. 15 sampling sites in two gently deformed areas around the Largentie??re and Croix-de-Pallie??res mines on the Ce??vennes border were selected for palaeomagnetic study. They yielded a very well-defined direction of remagnetization corresponding to an Early-Middle Eocene age. This remagnetization cannot be related to the formation of magnetic as a result of the transformation of smectite to illite because the latter has been well dated as a Mesozoic event. The magnetic overprint in this area is related to a chemical phenomenon during fluid migration. The age of remagnetization corresponds to a major uplift in the Pyre??ne??es mountains, located to the south of the Ce??vennes. This implies that fluid migration occurred from the south to the north as a result of hydraulic head established in the Pyre??ne??es orogenic belt during orogenesis and suggests that the MVT deposits in the Ce??vennes region formed from a gravity-driven fluid system as described by Garven & Freeze (1984a,b). |
| Genre: | Article |
| ProdID: | 70023369 |
| Citation Author: | Henry, B.; Rouvier, H.; Goff, M. L.; Leach, D.; Macquar, J. -C.; Thibieroz, J.; Lewchuk, M. T. |
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| Citation End Page: | 380 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Journal International |
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| Citation Number Of Pages: | 13 |
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| Citation Search Results Text: | Palaeomagnetic dating of widespread remagnetization on the southeastern border of the French Massif Central and implications for fluid and Mississippi Valley-type mineralization; 2001; Article; Journal; Geophysical Journal International; Henry, B.; Rouvier, H.; Goff, M. L.; Leach, D.; Macquar, J. -C.; Thibieroz, J.; Lewchuk, M. T. |
| Citation Start Page: | 368 |
| Citation Volume: | 145 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Palaeomagnetic dating of widespread remagnetization on the southeastern border of the French Massif Central and implications for fluid and Mississippi Valley-type mineralization; 2001; Article; Journal; Geophysical Journal International; Henry, B.; Rouvier, H.; Goff, M. L.; Leach, D.; Macquar, J. -C.; Thibieroz, J.; Lewchuk, M. T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1046/j.0956-540X.2001.01382.x |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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