Fluorite granites from Southwestern Sinai, Egypt with particular reference to the A-type
The petrographical and geochemical characteristics of some fluorite granites form Wadi baba area in the southwestern Sinai of Egypt are presented and compared with the A-type suites. The studied granites belong to the phase-HI ofEgyptian Younger Granites and are associated, in space and time, with a...
Elmentve itt :
| Szerző: | |
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1992
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| Sorozat: | Acta mineralogica-petrographica
33 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24802 |
| Tartalmi kivonat: | The petrographical and geochemical characteristics of some fluorite granites form Wadi baba area in the southwestern Sinai of Egypt are presented and compared with the A-type suites. The studied granites belong to the phase-HI ofEgyptian Younger Granites and are associated, in space and time, with a comagnetic phase-K. Petrochemically, the fluorite granites possess a peralkaline and sodic-potassic character, with high silica, alkalies and normative acmite. They are magmatic origin, typically A-type granites and are formed through partial melting of the upper mantle to lower crustal materials follow«! by crystal fractionation of a fluorine-rich extracted magma in a probable extensional environment. Tney are, moreover, crystallized under moderate temperature and pressure (1-6 Kb.) and are enplaced as moderate to shallow intrusives in the continental crust. |
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| Terjedelem/Fizikai jellemzők: | 57-65 |
| ISSN: | 0365-8066 |