Plate tectonics interpretation of the South Transdanubian ultramafics
Original rock of the South Transdanubian serpentine was oceanic harzburgite according to chemical composition. In country metamorphic rocks and granites, serpentines lie with steep tectonic contacts. They must have got in this position from above trough obduction. Consequently, these bodies wedge ou...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1981
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| Sorozat: | Acta mineralogica-petrographica
25 No. 1 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24684 |
| Tartalmi kivonat: | Original rock of the South Transdanubian serpentine was oceanic harzburgite according to chemical composition. In country metamorphic rocks and granites, serpentines lie with steep tectonic contacts. They must have got in this position from above trough obduction. Consequently, these bodies wedge out downwards and do not have any „roots". Serpentines underwent multiphase and partly very strong rnetamorphism, and their present lizardite—chrysotile composition has been developed probably in last phases. Regional granitization seems to be connected with the obductional origin of the peridotite bodies. Accordingly, the following geological history appears to have taken place: oceanic spreading — about Silurian; island arc development through subduction — about Devonian; collision of Precambrian continent having located on the coast of former ocean, with island arc •— Upper Devonian to Lower Carboniferous; postcollisional thermic—isostatic equalization („orogeny") — Lower (and Middle?) Carboniferous. The Upper Carboniferous to Lower Permian molasse is probably a product of the denudation and peneplanation after this „orogeny". |
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| Terjedelem/Fizikai jellemzők: | 3-24 |
| ISSN: | 0365-8066 |