Petrographic study of the Mórágy-type granitoid and the Cserdi conglomerate at Nyugotszenterzsébet (Mecsek Mts., South Hungary)
The Upper Carboniferous Mórágy-type granitoids were formed by anatectic and metasomatic processes. The two macroscopically different types (medium grained granite and aplite) have the same origin. The aplite was developed in the fracture zones where the crushed rocks were potashmetasomatized more th...
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/24772 |
| Tartalmi kivonat: | The Upper Carboniferous Mórágy-type granitoids were formed by anatectic and metasomatic processes. The two macroscopically different types (medium grained granite and aplite) have the same origin. The aplite was developed in the fracture zones where the crushed rocks were potashmetasomatized more thoroughly than the surrounding granite. It has higher microcline, lower mafic mineral content and well developed cataclastic texture with more fine grained matrix than the enclosing granite. Studies of the morphology of zircon grains provided a well detectable evolutional trend from the anatectic restites to the medium grained granite. In the course of anatexis the zircon grains developed the typical low temperature types from high temperature ones. The source rocks of the Middle Permian Cserdi Conglomerate were Lower Permian rhyolites and granitoids of unknown age. The latter ones are strongly mylonitized but show the same metasomatic phenomena as the Mórágy-type granitoids. The zircon types of the granitoid pebbles of the conglomerate are anatectic ones. Our opinion is that they derived from an upper part of the Mórágy-type granitoid complex. |
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| Terjedelem/Fizikai jellemzők: | 93-101 |
| ISSN: | 0365-8066 |