نتایج جستجو برای: arabian shield

تعداد نتایج: 13565  

Journal: :Minerals 2023

In this paper, certain areas of the Kingdom Saudi Arabia (KSA) are assessed in order to map potential geothermal energy zones. To evaluate high-resolution aerial magnetic data, spectral depth analysis using a modified centroid approach was used. The calculated parameters were gridded delineate regions characterised by shallow Curie point (CPD) and high gradient (GG) as well heat flow (HF). CPD,...

1999
M. M. EL - SAYED H. FURNES F. H. MOHAMED

-The Fawakhir ophiolitic sequence is composed mainly of serpentinites, metagabbros, boninitic metagabbros and metavolcanics. The serpentinites have geochemical features similar to those of depleted-mantle peridotites. Major and trace element characteristics show that the ophiolitic metagabbro and metavolcanic rocks are of tholeiitic to calc-alkaline affinity. REE abundances in the metagabbros a...

1997
H. Mo Helmy

Monazites from high-grade metapelitic paragneisses from the southern Eastern Desert of Egypt (Abu Swayel area) were analysed with the electron microprobe mainly in an attempt to broadly constrain the metamorphic ages of the rocks by means of chemical Th(U)-Pb dating. Two samples were investigated, one showed weak signs of a greenschist facies overprint, the other one did not. For each sample, w...

Journal: :Frontiers in Earth Science 2022

The Late Neoproterozoic Egyptian Nubian Shield (ENS) has attracted increasing attention since the establishment of Geological Survey and Mining Authority (EGSMA (1896)), which conducted first mapping. In last three decades, rapid improvements in analytical techniques, along with field-oriented studies, have made it possible for interpretation ENS as an integral part juvenile Arabian–Nubian (ANS...

2016
P. Jish Prakash Georgiy Stenchikov Weichun Tao Tahir Yapici Bashir Warsama Johann P. Engelbrecht

Both Moderate Resolution Imaging Spectroradiometer (MODIS) and Spinning Enhanced Visible and InfraRed Imager (SEVIRI) satellite observations suggest that the narrow heterogeneous Red Sea coastal region is a frequent source of airborne dust that, because of its proximity, directly affects the Red Sea and coastal urban centers. The potential of soils to be suspended as airborne mineral dust depen...

Journal: :Geoscience frontiers 2021

The Shaitian granite complex (SGC) spans more than 80 Ma of crustal growth in the Arabian–Nubian Shield southeast Egypt. It is a voluminous composite intrusion (60 km2) comprising host tonalite massif intruded by subordinate dyke-like masses trondhjemite, granodiorite and monzogranite. tonalite, turn, encloses several, fine-grained amphibolite enclaves. U-Pb zircon dating indicates wide range c...

Journal: :Minerals 2023

Loveringite, a rare member of the crichtonite group with nominal formula (Ca,Ce)(Ti,Fe,Cr,Mg)21O38, was found in Khamal layered mafic intrusion, first known locality for this mineral Arabian Shield. The large post-collisional complex, is lithologically zoned, bottom to top, from olivine gabbro through gabbronorite, hornblende gabbro, anorthosite, and diorite quartz diorite. Loveringite near bas...

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