Paleomagnetism of some Syrian Arcs in North Sinai and Eastern Desert, Egypt ; Tectonic implications
The palaeomagnetic characteristics of rocks from three Syrian arcs in Sinai and north Eastern Desert have been investigated. Rocks of Triassic, Jurassic and Lower Cretaceous ages were collected from Arif El-Naqa (NE Sinai), Maghara (N Sinai) and Shabrawet (north Eastern Desert) anticlines, respectiv...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1993
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| Sorozat: | Acta mineralogica-petrographica
34 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24812 |
| Tartalmi kivonat: | The palaeomagnetic characteristics of rocks from three Syrian arcs in Sinai and north Eastern Desert have been investigated. Rocks of Triassic, Jurassic and Lower Cretaceous ages were collected from Arif El-Naqa (NE Sinai), Maghara (N Sinai) and Shabrawet (north Eastern Desert) anticlines, respectively. The studied rocks were subjected to AF and/or thermal demagnetization and found carrying a stable secondary magnetization. This magnetization may have been acquired during the late stage of folding in the Upper Cretaceous-Lower Tertiary time. A chemical origin is proposed for the isolated remanent magnetization as a result of recrystallization of the magnetic.carriers.that might have taken place due to folding forces. When the isolated characteristic remanent directions were compared to the expected ones; for each area they suggest magnetotectonic models for the studied areas. According to these models, both, Arif El-Naqa andMaghara anticlines seem to have been dragged to the SE as a result:of.thrusting:.On the other hand, the Shabrawet anticline seem to have a different tectonic attitude where block rotations around vertical axis might be responsible for the resultant deviated palaeomagnetic directions: The, proposed models were geologically tested and found feasible and provide a simple explanation; for. the obtained palaeomagnetic data. |
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| Terjedelem/Fizikai jellemzők: | 79-98 |
| ISSN: | 0365-8066 |