Results 11 to 20 of about 1,754 (181)

Discrimination of Neoproterozoic granitic-phases in Southern-Sinai, Egypt. Remote sensing, petrography and geochemistry

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2021
At Sharm El-Sheikh area a unique association of Neoproterozoic Younger granitic phases is found. These granitic rocks are petrographically identified as monzogranite, syenogranite, alkali feldspar granite, and riebeckite granite.The magma sources of ...
N.I. Abd El Ghaffar   +4 more
doaj   +1 more source

PETROLOGY AND URANIUM DISTRIBUTION IN THE YOUNGER GRANITES OF GABAL ABU DIAB AREA, EASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2005
The area of Gabal Abu Diab (about 92.5km2) is located between latitudes 25º 11` and 25º 16`N and longitudes 34º 11` and 34º 17` E.  The younger granites of G.
MEDHAT M. EL-MANSI
doaj   +1 more source

GEOLOGY, RADIOACTIVE MINERALOGY AND GEOCHEMISTRY OF THE GRANITEIC ROCKS OF GABAL KHASHM EL-RISHA AREA, NORTH EASTERN DESERT, EGYPT. [PDF]

open access: yesDelta Journal of Science, 2007
The rocks cropping out in the area are older granitoids (quartz diorites and granodiorites), Dokhan volcanic, younger granites (syenogranites and alkali feldspar granites) and dyke swarms of mafic and felsic composition trending mainly in the NESW and NW-
S.S. Farag, A.A. Omran
doaj   +1 more source

Two-stage, U-mineralization of A-type granites from the Huangmeijian complex, eastern China

open access: yesSolid Earth Sciences, 2023
Parts of A-type granites are closely related to some critical mineral resources. The study of origin and geochemical properties of those A-type granites are of great significance in revealing the metallogenic potential. The Early Cretaceous Huangmeijian (
Xiao-Yan Jiang   +4 more
doaj   +1 more source

CONTRIBUTION TO THE GEOLOGY AND RADIOACTIVITY OF THE OLDER GRANITOIDS AND YOUNGER GRANITED OF GABAL EL-URF-GABAL ABU SHIHAT AREA, EASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2005
The younger granites form an elongated belt following NNE-SSW direction. They intrude the older granitoids with sharp intrusive contacts and carry them as roof pendants. Two varieties of the younger granites are identified.
AHMED M. DARDIER, MEDHAT M. EL-MANSI
doaj   +1 more source

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

Petrogenesis and tectonic setting of the Early Permian gabbro–granite complex in the southeastern Central Asian Orogenic Belt, central Inner Mongolia, China

open access: yesJournal of Asian Earth Sciences: X, 2021
Gabbro–granite complexes formed in active continental margins provide critical constraints on magmatic processes, crust–mantle interactions, and tectonic evolution.
Xiaofei Zhang   +8 more
doaj   +1 more source

PETROGENESIS OF SELECTED PEGMATITIC BODIES FROM EASTERN DESERT AND SINAI MASSIF, EGYPT [PDF]

open access: yesDelta Journal of Science, 2005
Selected pegmatitic bodies of simple and complex types (unzoned and zoned) located in the Eastern Desert (ED) and Sinai Massif (SM) have been carefully studied. The simple pegmatites under consideration occur at Wadi Hawashia (northern ED), Gabal El Hudi
E.K. Abu Zeid   +4 more
doaj   +1 more source

Not all feldspars are equal: a survey of ice nucleating properties across the feldspar group of minerals [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
Mineral dust particles from wind-blown soils are known to act as effective ice nucleating particles in the atmosphere and are thought to play an important role in the glaciation of mixed phase clouds.
A. D. Harrison   +9 more
doaj   +1 more source

San José de Guaviare Syenite, Colombia: Repeated Ediacaran intrusions in the northwestern Amazonian Craton

open access: yesBoletín Geológico, 2021
The Neoproterozoic igneous rocks found in the municipality of San José del Guaviare include several isolated plutonic bodies that protrude from the Phanerozoic sedimentary cover in belts aligned NW-SE.
Carolina Amaya López   +8 more
doaj   +1 more source

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