نتایج جستجو برای: arabian shield
تعداد نتایج: 13565 فیلتر نتایج به سال:
Midyan granites are located in the northern Arabian shield, northwest Saudi Arabia, terrain. They represent most northerly segment of Arabian–Nubian which comprises part East African orogeny. Consequently, understanding origin post-collisional and anorogenic magmatism terrain has significant geodynamic implications. mainly composed alkali feldspar granite, syenogranite, rarely granodiorite dior...
The Bi'r Umq suture zone (BUSZ) in western Saudi Arabia comprises Neoproterozoic oceanic-arc plutonic, volcanosedimentary, and ophiolitic rocks that record some of the earliest magmatic and tectonic events of the East African Orogen in the Arabian–Nubian Shield (ANS). New Nd isotopic analyses are combined with data on zircon inheritance and published isotopic studies to establish the case that ...
Detrital zircon grains from Cambrian–Lower Ordovician sandstones and quartzites sampled in the Pyrenees were dated by LA-ICPMS order to assess their provenance sources. Resulting age distributions are compared other available datasets neighbouring margins, such as Morocco, Iberian Peninsula, southern France Sardinia. Kolmogorov-Smirnov (K-S) test Crystallization Age-Depositional Age (CA-DA) dia...
The mantle rocks from Kadaboura and Madara areas represent sections of dismembered ophiolitic complexes developed during the Neoproterozoic in Eastern Desert Egypt, which is located northwestern corner Arabian–Nubian Shield. comprise serpentinites serpentinized dunites, whereas those consist pyroxenites.Despite serpentinization studied rocks, few relicts primary chromite, olivine pyroxene are p...
[1] We investigate the lithospheric and upper mantle shear wave velocity structure and the depth-dependence of anisotropy along the Red Sea and beneath the Arabian Peninsula using receiver function constraints and phase velocities of surface waves traversing two transects of stations from the Saudi Arabian National Digital Seismic Network. Frequency-dependent phase delays of fundamental-mode Lo...
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