Geochemistry, Tectonic setting and classification of some granitoids, Gebel Abu El-Hasan, North Eastern Desert, Egypt
Fifty six new chemical analyses for major and selected trace and REE of some granitoid rocks from Abu ElHasan pluton, North Eastern Desert are presented. The petrochemical and geochemical characters of these granitoids. The studied rocks have a calc-alkaline to rather alkaline nature. Their chemical...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1998
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| Sorozat: | Acta mineralogica-petrographica
39 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24869 |
| Tartalmi kivonat: | Fifty six new chemical analyses for major and selected trace and REE of some granitoid rocks from Abu ElHasan pluton, North Eastern Desert are presented. The petrochemical and geochemical characters of these granitoids. The studied rocks have a calc-alkaline to rather alkaline nature. Their chemical features reveal that they are well differentiated with an average THORNTON and TUTTLE D. I. 95. 83. These granitoids are lowcalcium somewhat potassic rather than sodic and peraluminous. According to the different chemical classifications, Abu El-Hasan granitoids fall in the fields of granite, alkali granite, alkali feldspare granite, syenogranite and monzogranite. Variation and discrimination diagrams of major, selected trace and REE suggest that Abu El-Hasan granitoids are derived from partial fusion of the upper mantle with some crustal melt contribution. The source magma was subjected to high fractionation during successive pulses. The studied granitoids mostly pertain to the syn-and late-to post-orogenic highly fractionated calc-alkaline-granite suite. The younger granitoids (late-to post-orogenic) formed under extensional enviroment, while the older (synorogenic) are comparable with the compessional suite of PETRO et al., (1979). |
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| Terjedelem/Fizikai jellemzők: | 49-75 |
| ISSN: | 0365-8066 |