Comparative petrology and geochemistry of highpressure metamorphic rocks from Eastern Cuba and Western Alps
The paper deals with HP metamorphic rocks from E-Cuba in the surroundings of Holguin. Thes rocks are mainly eclogitic which occur in blocks of different size in serpentinite along with other oceanic and island arc type rocks. The eclogitic rocks are mainly of oceanic type, related to subduction. The...
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: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24768 |
| Tartalmi kivonat: | The paper deals with HP metamorphic rocks from E-Cuba in the surroundings of Holguin. Thes rocks are mainly eclogitic which occur in blocks of different size in serpentinite along with other oceanic and island arc type rocks. The eclogitic rocks are mainly of oceanic type, related to subduction. The rocks underwent greenschist facies retrogression followed by metasomatism during their tectonic evolution. Chemical and REE analyses were applied in geochemical studies of these rocks. Garnet, pyroxene and amphibole compositions were measured by electron microprobe, and the results were compared with the data of the well-known HP rocks of W-Alps obtained from the literature. On the basis of the analytical results it has been concluded that the eclogitic rocks of E-Cuba were ophilitic, regarding their origin, which underwent high rpessure conditions during subduction. The retrogression can be related to obduction and overthrusting which are due to an uplift caused by a new subduction. The geochemical features of the eclogitic rocks E-Cuba allow us to interpret the petrologic processes the same way as it was done in the case of the W-Alps. |
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| Terjedelem/Fizikai jellemzők: | 35-54 |
| ISSN: | 0365-8066 |