Geochemistry of some HP-metavolcanics from Western Alps metaophiolites
Ophiolite metavolvanics from Monviso, Arc valley and Montgenévre in the Piedmont Zone of the Western Alps are geochemically investigated and compared with data obtained from oceanic crust. Belonging to the Zermatt-Saas and Combin (Monviso and Arc valley) units they are characterized by HP-facies met...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1989
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| Sorozat: | Acta mineralogica-petrographica
30 |
| Kulcsszavak: | Geokémia, Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24769 |
| Tartalmi kivonat: | Ophiolite metavolvanics from Monviso, Arc valley and Montgenévre in the Piedmont Zone of the Western Alps are geochemically investigated and compared with data obtained from oceanic crust. Belonging to the Zermatt-Saas and Combin (Monviso and Arc valley) units they are characterized by HP-facies metamorphism including eclogite-facies metabasalts and garnet-bearing glaucophanites that underwent into greenschist-facies metamorphism. Few metavolcanics (Montgenévre) are partly escaped from ocean-floor metamorphism, but they are overprinted by Alpine deformation. They show a large variation in the bulk rock geochemistry and roughly compare to MORB and a few of them show an IAT character. Their geochemical characters prevalently similar to that of oceanic ridge basalts and they show abyssal tholeiitic differentiation trend. |
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| Terjedelem/Fizikai jellemzők: | 55-65 |
| ISSN: | 0365-8066 |