asran58

Prof.Dr.Asran Mohamed Hassan Asran

Professor -

Faculty of science

Address: Geology Department, Faculty of Science, Sohag University

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Petrological and geochemical investigations of Dokhan volcanics in Wadi Sodmein area, Central Eastern desert, Egypt.

2005 | Keywords Sodmein, Dokhan volcanics, , Eastern Desert, Egypt, , Geochemistry,
Petrological and geochemical investigations of Dokhan volcanics in Wadi Sodmein area, Central Eastern desert, Egypt.
Wadi Sodmein area lies to the northwest of Quseir town on the Red Sea. The studied volcanic rocks are distinguished into Dokhan Volcanics and felsites. The Dokhan Volcanics are subdivided into two rock units, an older unit of andesite-dacite composition and a younger unit of rhyolite, rhyolitic tuffs and ignimbrite. They have petrographical and geochemical features similar to calc-alkaline, subduction-related ... Read more

Continental Rift Zone (CRZ) Al-Haruj Tertiary basalts, Libya: Petrological and geochemical approach.

2004 | Keywords Continental Rift, Geochemistry, Basalts, Libya, Al Haruj,
Continental Rift Zone (CRZ) Al-Haruj Tertiary basalts, Libya: Petrological and geochemical approach.
Al-Haruj Tertiary basalts cover an area of about 50,000 km2 in central Libya. This occurrence is the largest among the other Libyan occurrences. They are diferentiated in the field into two volcanic series separated by a long hiatus. Each series is characterized by its weathering features, morphology and primary igneous structures. Geochemically, Al-Haruj basalts are alkaline to subalkaline, suggesting increasing ... Read more

Petrology, geochemistry and opaques of mélange rocks along Wadi Abu Haramiya, Central Eastern Desert, Egypt.

2003 | Keywords melange, W.Abu Haraniya, , Geochemistry, Eastern Desert, , Egypt,
Petrology, geochemistry and opaques of mélange rocks along Wadi Abu Haramiya, Central Eastern Desert, Egypt.
The Precambrian basement rocks exposed along Qift- Quseir asphaltic road, central Eastern Desert (CED) of Egypt, exhibits two contrasted tectonic units each of which has its own lithology structural style and grade of metamorphism. The older (lower infrastructural rocks) unit exposed in the Meatiq swell is composed of mylonites, cataclased gneisses, amphibolites and gneissose granite and is intruded by syn-to ... Read more

Petrology, geochemistry and opaques of mélange rocks along Wadi Abu Haramiya, Central Eastern Desert, Egypt.

2003 | Keywords melange, W.Abu Haraniya, , Geochemistry, Eastern Desert, , Egypt,
Petrology, geochemistry and opaques of mélange rocks along Wadi Abu Haramiya, Central Eastern Desert, Egypt.
The Precambrian basement rocks exposed along Qift- Quseir asphaltic road, central Eastern Desert (CED) of Egypt, exhibits two contrasted tectonic units each of which has its own lithology structural style and grade of metamorphism. The older (lower infrastructural rocks) unit exposed in the Meatiq swell is composed of mylonites, cataclased gneisses, amphibolites and gneissose granite and is intruded by syn-to ... Read more

Geochemistry, petrogenesis and fluid inclusion studies of the Kadabora granite pluton and associated enclaves, Central Eastern Desert, Egypt.

2003 | Keywords Kadabora, Fluid inclusions, , Geochemistry, Eastern Desert,
Geochemistry, petrogenesis and fluid inclusion studies of the Kadabora granite pluton and associated enclaves, Central Eastern Desert, Egypt.
_The studied area is occupied by Neoproterozoic basement rocks comprising ophiolitic melange, metagabbro-diorite complex, younger granites and post-granite dykes._ _Detailed field studies revealed that Kadabora pluton is differentiated into three phases: granodiorite phase I, monzogranite phase II is and finally syeno- alkali feldspar- granite phase III._ _Mafic enclaves (ME) with andesitic composition are recorded only in granodiorite phase I and ... Read more

G of Neeochemistry and petrogenesisoproterozoic Nuqara Dokhan volcanics, Central Eastern Desert, Egypt

2003 | Keywords , Central Eastern Desert, Egypt, Nuqara , Dokhan volcanics, Neoproterozoic,
G of Neeochemistry and petrogenesisoproterozoic Nuqara Dokhan volcanics, Central Eastern Desert, Egypt
The Neoproterozoic Nuqara Dokhan volcanics are distinguished into two main groups: a) intermediate volcanics that comprised basaltic andesites, andesites and their associated pyroclastics, b) felsic volcanics, consisting of dacite, rhyodacite, rhyolites and ignimbrites.. Their major and trace elements have a wide ranges in which SiO2 (76-54%), CaO (8.95-0.2%), TiO2 (1.6-0.4%), Sr (97-52 ppm), Zr (40-160 ppm), Cr (231-4 ppm), and ... Read more

Back-Arc ophiolitic rocks at Wadi El-Markh, Central Eastern Desert, Egypt

2003 | Keywords , Geochemistry, Back-Arc, ophiolitic rocks, Wadi El-Markh, Central Eastern Desert, Egypt,
Back-Arc ophiolitic rocks at Wadi El-Markh, Central Eastern Desert, Egypt
El Markh ophiolitic sequence is formed mainly of imbricated and dismembered ultramafic-mafic rocks including serpentinites, metagabbros, boninitic metagabbros and metabasalts. The major and trace elements data indicate that the serpentinites and the metagabbroic-basaltic association are not related to each other by fractional crystallization of a common parental magma, but represent independently generated magmas. The gabbroic-basaltic association were produced by the ... Read more

Geochemistry, petrogenesis and radioactivity of Pan-African granitoids, Fatirah area, Eastern Desert, Egypt.

2001 | Keywords Pan-African, W.Fatirah, Easter, Granites, Geochemistry, Radiot, Radioactivity,
Geochemistry, petrogenesis and radioactivity of Pan-African granitoids, Fatirah area, Eastern Desert, Egypt.
On the basis of the geological and petrological investigations, the Pan-African granitoid rocks of Wadi Fatirah area are differentiated into two distinct assemblages, viz. the older granites and younger granites. The older granitoids comprise quartz diorite, tonalite and granodiorite, arranged in accordance to their sequence of emplacement. The older granites are calc-alkaline in character and of I-type and were emplaced ... Read more

Petrological and geochemical characters of the Sikait gneissose granite complex, Eastern Desert, Egypt.

2001 | Keywords Egypt, Eastern Desert, Geochemistry, Gneissose granite, Sikait,
Petrological and geochemical characters of the Sikait gneissose granite complex, Eastern Desert, Egypt.
The Sikait gneissose granite complex occupies the area between the upper reaches of Wadi Sikait and Wadi Abu Rusheid, covering an area of about 26 km2 exposed along the core of a SE plunging anticline. Detailed field studies revealed that the Sikait gneissose granite complex can be differentiated into gneissose granodiorites, gneissose granites, and gneissose alkali feldspar granites arranged from ... Read more

Subduction-related Wadi Dabr metagabbro-diorite complex, intrusive gabbros and the enclosed opaques, Central Eastern Desert, Egypt.

2001 | Keywords W.Dabr, subduction-related, , Eastern Desert, Egypt, , Metagabbro-diorite complex,
Subduction-related Wadi Dabr metagabbro-diorite complex, intrusive gabbros and the enclosed opaques, Central Eastern Desert, Egypt.
The Dabr metagabbro-quartz diorite intrusion (DMQD), commonly described as metagabbro-diorite complex, occurring along Wadi Dabr, forms an elongated mass intruded into the metavolcanics and associated pyroclastics. It is intruded by younger gabbro (Ygb) and younger granites. The DMQD comprises metagabbro, diorites , quartz diorite and appinites.. Variation diagrams of the DMQD suggest fractional crystallization by separation of pyroxene followed by ... Read more