Results 11 to 20 of about 10,226 (223)

Granitoids and trachytes of Um Shager-Hamadat area, Central Eastern Desert, Egypt: Remote sensing characterization and petrology

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2022
The late Neoproterozoic granitoids of Gebel Um Shager and Gebel Hamadat, Central Eastern Desert of Egypt, in addition to Paleozoic trachytes of both areas were discriminated using Landsat-8, and Sentinel-2 dataset.
Mohamed W. Ali-Bik   +3 more
doaj   +1 more source

Statistical analysis on the radiological assessment and geochemical studies of granite rocks in the north of Um Taghir area, Eastern Desert, Egypt

open access: yesOpen Chemistry, 2022
Granite rocks are currently one of the foremost raw materials that can be used for various economic purposes such as ornamentation and building materials, because they do not possess radioactive concentrations and have good physical and mechanical ...
Awad Hamdy A.   +10 more
doaj   +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

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

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

Nb-Zr enrichment in Jabal Al Bayda A-type granites, western Arabian Shield, Saudi Arabia: interplay of magmatic and hydrothermal processes

open access: yesJournal of Taibah University for Science, 2022
Al Bayda’s younger granitic pluton located within the western Arabian Shield, Al Madinah area, KSA, has been studied using collaborative techniques. The collected samples were studied petrographically using a polarizing microscope and geochemically using
Sayed Mohamed Sakr   +2 more
doaj   +1 more source

Petrography and petrology of the Ayghalesi granite, east of Takab area (northwest of Iran) [PDF]

open access: yesپترولوژی, 2017
The investigated granite intrusion is located at the north of Ayghalesi village, east of Takab The Ayghalesi granite has been intruded the Eocene sandstone and conglomerate rocks and low grade metamorphic hornfels have been metamorphosed host rocks.
Saeed Kamran   +3 more
doaj   +1 more source

Petrogenesis and dating of Doran and Shah Bolaghi intrusions: Implications for post-collisional sodic and high-silica granitic magmatism [PDF]

open access: yesپترولوژی, 2022
IntroductionThe Precambrian-Early Cambrian magmatism in Iran includes magmatic rocks in the central, northwestern (e.g. Tekab-Zanjan zone), and northeastern parts of the Iranian plate.
Zahra Badrzadeh, Mehraj Aghazadeh
doaj   +1 more source

PETROLOGY AND GEOCHEMISTRY OF BASEMENT GNEISSIC ROCKS AROUND OKA-AKOKO, SOUTHWESTERN, NIGERIA [PDF]

open access: yesMalaysian Journal of Geosciences, 2018
The gneissic rocks of Oka-Akoko area forms part of the Migmatite-Gneiss-Quartzite Complex of the Southwestern Nigerian Basement Complex. The petrologic units in the study area include grey gneiss, granite gneiss, Older granite, charnockite and minor ...
Adegbuyi, O.,   +2 more
doaj   +1 more source

Hybridization in the subvolcanic Jaala-Iitti complex and its petrogenetic relation to rapakivi granites and associated mafic rocks of southeastern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1995
The 1630 Ma Jaala-Iitti complex is an example of bimodal rapakivi granite magmatism in which the interaction of granite and diabase magmas have led locally to hybridization.
P.T. Salonsaari
doaj   +1 more source

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