Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Said A. El-Nisr"'
Publikováno v:
Journal of African Earth Sciences. 115:92-107
Miocene rhyolites (19.2 ± 0.9 Ma) at the Jabal Shama in western Saudi Arabia represent an example of rift-related silicic volcanism that took place during the formation of the Red Sea. They mostly consist of tuffaceous varieties with distinct flow b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf02dd00737853e9f917a4ea93496c92
https://doi.org/10.1016/j.jafrearsci.2015.11.016
https://doi.org/10.1016/j.jafrearsci.2015.11.016
Autor:
Mohamed M. El-Sayed, Said A. El-Nisr
Publikováno v:
Geochemistry. 62:216-236
The zoned Mukhattata pluton, covering an area of about 25 km2, is composed of three zones becoming more felsic towards the centre of the pluton (normal zoning). The most outer zone consists of gabbro/diorite composition changing into tonalite (second
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72d307ba2763519371e2d7ca9774e655
https://doi.org/10.1078/0009-2819-00009
https://doi.org/10.1078/0009-2819-00009
Publikováno v:
Journal of African Earth Sciences. 33:261-282
The younger granitoids of the Shalatin-Halaib district in the south Eastern Desert of Egypt are of syenogranite compositions. Based on petrological and geochemical studies, the syenogranites have been differentiated into two distinct types, namely bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68e0a0ffc5bda7efe98b2e7d81e3a914
https://doi.org/10.1016/s0899-5362(01)80063-4
https://doi.org/10.1016/s0899-5362(01)80063-4
Autor:
Said A. El-Nisr
Publikováno v:
Journal of African Earth Sciences. 24:301-313
The Dokhan volcanics at Wadi Allaqi, situated in the south Eastern Desert of Egypt, range in composition from basaltic-andesite to dacite. Geochemically, they have a transitional character from low K-tholeiite to calc-alkaline with a relatively high
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed0ad86677d9e24230f688ff7cc37904
https://doi.org/10.1016/s0899-5362(97)00045-6
https://doi.org/10.1016/s0899-5362(97)00045-6
Autor:
Said A. El-Nisr, Gehad M. Saleh
Tow mica granites of the Abu Rusheid - Eir Arib district in the Southeastern Desert of Egypt, cut pre-existing faults, and their contacts with the country rocks are sharp and lack contact metamorphism. They were intruded into a low - to high grade me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31c224aca5a8aae27282e6b3c58b1d7e
https://zenodo.org/record/3445596
https://zenodo.org/record/3445596
Publikováno v:
Journal of African Earth Sciences. 22:29-42
Younger granites (post tectonic) are common throughout the Precambrian igneous/metamorphic terrain of Egypt and they played a significant role in the evolution of the Pan-African crust. The Gabal Igla Ahmar pluton comprises two magmatic suites: a cal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67d5a733cce2fa5beb4dd860269e4e70
https://doi.org/10.1016/0899-5362(95)00122-0
https://doi.org/10.1016/0899-5362(95)00122-0
Publikováno v:
Journal of Microscopy and Ultrastructure. (1):41-55
Ore microscopic investigation of core samples from the Bi’r Tawilah gold prospect enables to distinguish three main groups of ore paragenesis from oldest to youngest, namely magmatic, hydrothermal and supergene. The ore minerals are encountered in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3229d91a5f6a389a60e0381bfc1e535