Results 21 to 30 of about 22,333 (258)

Sedimentological Study of Sand Dunes in the Al-Najaf Province, Central Iraq [PDF]

Journal of Stratigraphy and Sedimentology Researches
This study focused on the sedimentological attributes of the dunes in the Najaf Governorate, southern Iraq. Twelve spot samples were collected from two areas, the first was approximately 3 km from Madhlum Village, and the other was west of Al-Manathera ...
Mohammed Hussein, Mohanad Al-Owaidi, Hamid Alsultan   +2 more
doaj   +1 more source

A-type granites: geochemical characteristics, discrimination and petrogenesis

, 1987
New analyses of 131 samples of A-type (alkaline or anorogenic) granites substantiate previously recognized chemical features, namely high SiO2, Na2O+K2O, Fe/Mg, Ga/Al, Zr, Nb, Ga, Y and Ce, and low CaO and Sr.
J. Whalen, Kenne Currie, B. Chappell
semanticscholar   +1 more source

Age and origin of the gabbros in the Jilotlán pluton, Jalisco: primitive magmatic rocks in the southern part of the Guerrero terrane

Revista Mexicana de Ciencias Geológicas, 2018
An outstanding feature of the Mexican Cordilleran magmatic arc between Sonora and Chiapas is the presence of numerous plutonic and batholitic bodies of Cretaceous to Miocene ages.
Daniel Villanueva-Lascurain, Gabriela Solís-Pichardo, Peter Schaaf, Teodoro Hernández-Treviño, Josué Salazar-Juárez, Pedro Corona-Chávez   +5 more
doaj   +1 more source

Petrogenisis of Mafic- intermediate Magmatism, East of Sanandaj; A New approach with careful monitoring of geochemical evidences [PDF]

پترولوژی, 2019
The East Sanadaj magmatic rocks of the northern Sanandaj-Sirjan Zone, part of Zagros Orogen, comprise several intrusive bodies that were generated during northeastward subduction of Neo-tethys beneath the Iranian sector of the Eurasian plate.
Sanaz Yajam
doaj   +1 more source

Triassic magmatism and tectonic setting of Eastern Tianshan, NW China: constraints from the geochemistry and zircon U–Pb–Hf isotopes of granitoids in the Yamansu area

Frontiers in Earth Science, 2023
Introduction: To provide constraints on the Triassic tectonic setting of Eastern Tianshan, an integrated study was conducted on the geochronological and geochemical data for granodiorites, monzogranites, and two-mica granites from the Yamansu area on the
Hongming Cai, Hongming Cai, Hongming Cai, Xiangkuan Gong, Guiping Liu, Ruiqing Guo, Keyong Wang   +6 more
doaj   +1 more source

Geochronology and petrogeochemical characteristics of U-bearing granites in the Dongshang deposit, northwestern Jiangxi, China and its geological significance

Dizhi lixue xuebao, 2023
The Dongshang Uranium Deposit is situated in the southern section of the Ganfang Pluton in the Jiuling Orogenic Belt of northwestern Jiangxi Province. The U-bearing granites consist mainly of medium- to coarse-grained, porphyritic biotite(binary) granite.
DANG Feipeng, LYU Chuan, TANG Xiangsheng, ZHANG Yong, XIAO Zhibin, LI Zhipeng, TANG Junyang, ZHANG Tao   +7 more
doaj   +1 more source

Petrogenesis of metabasalt rocks in the Bulfat complex, Kurdistan region, Iraqi Zagros Suture Zone [PDF]

Kirkuk Journal of Science, 2015
Metabasaltes are exposed in the Bulfat complex north of Qaladeza that is a part of the Northwestern Zagros Suture Zone (NZSZ).Petrographic and geochemical study of metabasaltes have been conducted in order to provide insights into the origin and ...
Sarmad A. Ali
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

Journal 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, Abdullah Omar Bamousa, Ahmed Gad   +2 more
doaj   +1 more source

Petrogenesis of metamorphic rocks

, 1965
H. Winkler
semanticscholar   +2 more sources

Zr-Th-U MINERALS IN HIGH-MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS) – EVIDENCE FOR CRUST–MANTLE INTERACTION

Геодинамика и тектонофизика, 2021
Zr-Th-U minerals, namely baddeleyite, zircon and U-Th-oxide, were found in high-Mg diorite from the Late Devonian – Early Carboniferous synplutonic dyke in granodiorites of the Chelyabinsk massif, South Urals.
T. A. Osipova, G. A. Kallistov, D. A. Zamyatin, V. A. Bulatov   +3 more
doaj   +1 more source