Results 31 to 40 of about 542 (177)

LA-ICP-MS Zircon U-Pb Dating of Alkali-Feldspar Granites from the Dawan Mo-Be Deposit, Xiapu, Fujian Province

open access: yesYankuang ceshi, 2018
BACKGROUND The Mo-Be deposit in Xiapu Dawan, Fujian Province is located in a volcanic rock area. Mineralization may be closely related to magmatic activity and fracture structure.
HUANG Xin-peng
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

The Shahewan rapakivi-textured granite-quartz monzonite pluton, Qinling orogen, central China: Mineral composition and petrogenetic significance [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
The Mesozoic Shahewan pluton consists of four texturally different types of biotite-hornblende quartz monzonite. In the porphyritic types alkali feldspar occurs as euhedral or ovoidal megacrysts that are often mantled by one or more plagioclase shells ...
X. Wang, T. Wang, I. Haapala, X. Lu
doaj   +1 more source

EXAMINATION OF TWO GRANITE PHASES ALONG WADI ABU ZAWAL AREA, NORTHEASTERN DESERT, EGYPT [PDF]

open access: yesDelta Journal of Science, 2006
The present work deals with the two granite phases along Wadi Abu Zawal area, North Eastern Desert, Egypt. G. Ad-Dub is located at the northeaster part of the mapped area as an elongate granitoid belt covering collectively about 0.5km2, tending NE and ...
Ata A. El Shafi, Wifky A. EL-Naggar
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

MINERALOGY AND RADIOACTIVITY OF EL-ROSIS SHEAR ZONE, SOUTHERN SINI, EGYPT. [PDF]

open access: yesDelta Journal of Science, 2007
Ei-Rosis area is mainly covered by syeno- and alkali feldspar granites intruded into the granodiorites with sharp contacts. The alkali feldspar granite is dissected by WNW-ESE shear zone along which alteration products such as hematitization and ...
A.H.A. Bishr   +3 more
doaj   +1 more source

Evaluation of granitic rocks as feldspar source: Al Madinah, Western Part of Saudi Arabia

open access: yesJournal of Taibah University for Science, 2018
The source of the feldspar is found in the Late-Precambrian granitoid rocks of Al Madinah area, which covers about 2000 km2 within a 44,000 km2 area of the western part of Saudi Arabia.
Mousa Gougazeh   +2 more
doaj   +1 more source

ASTER VNIR‐SWIR Based Lithological Mapping of Granitoids in the Western Junggar Orogen (NW Xinjiang): Improved Inputs to Random Forest Method

open access: yesEarth and Space Science, 2023
Although advanced spaceborne thermal emission and reflection radiometer multispectral analysis for lithological mapping has been widely applied, traditional methods such as band ratios (BR) and principal component analysis (PCA) are still hampered by ...
Yarong Zhou   +3 more
doaj   +1 more source

Melt-melt immiscibility and implications for the origin of Madeira albite-rich granite, Pitinga mine, Amazonas, Brazil: A melt inclusion study

open access: yesBrazilian Journal of Geology, 2022
Presented here are the results of the first studies of silicate melt inclusions hosted in quartz crystals from the two late granitic facies of the Paleoproterozoic Madeira pluton in the Pitinga mine, State of Amazonas, Brazil. The study of these magmatic
Régis Munhoz Krás Borges   +7 more
doaj   +1 more source

Petrography, Geochemistry and Tectonic Setting of the Harris Granite Body, Located in Mishu Mountains, Northwest of Iran (Shabestar City) [PDF]

open access: yesپترولوژی, 2021
The Harris granitoid body, as a part of Alborz-Azarbaijan zone, located in the northwestern Iran and west of Shabestar city. The intrusive body cut the Kahar formation and covered by non-conformably Permian sediments. This body is granite- alkali granite
Farhad Pirmohammadi Alishah
doaj   +1 more source

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