Results 41 to 50 of about 2,212 (216)

Petrology and gold content of adakitic granitoids of usthbelovskii complex in Makarevskii range of Gorny Altai

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
The relevance of the discussed issue is caused by the need of researching petro-geochemistry and petrologic peculiarities of gabbrogranitoid massifs of Makarevskii range which are related spatially to gold occurrence.
Anatoliу Ivanovich Gusev, Alexander Feopenovich Korobeinikov   +1 more
doaj   +2 more sources

Mineralogy Constraints on Magmatic Processes Controlling Adakitic Features of Early Permian High-magnesium Diorites in the Western Tianshan Orogenic Belt

, 2020
Whole-rock geochemistry, usually changed by magmatic processes, might provide misleading information on the petrogenesis of adakites. The Heishantou porphyritic diorites in Nileke, Western Tianshan orogenic belt record complex magma chamber processes ...
Wang, Xue, He, Peng-Li, Yang, Fan, Huang, Xiao-Long, Peng-Li He, Fan Yang, Xue Wang, Xiao-Long Huang   +7 more
core   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

Material composition of the Sharagol complex gabbro-diorite Late Paleozoic massifs of the Ungo-Khilok area, Central Transbaikalia, Russia

Известия Томского политехнического университета: Инжиниринг георесурсов
The significance of the research is determined by the lack of information on the composition of rocks of the gabbro-diorite intrusion and their role in continental crust formation and the age of manifestation of basic- intermediate magmatism on this ...
Roza A. Badmatsyrenova, Yaroslav Yu. Shelepov   +1 more
doaj   +1 more source

Age, composition, and source of the Macururé Mafic Suite, Southern Borborema Province, Brazil

Brazilian Journal of Geology, 2020
The Capela, Dores, Aquidabã, Camará, Campo Grande, and Pedra Branca stocks constitute the Macururé Mafic Suite of the Sergipano Orogenic System, Southern Borborema Province.
Fábio dos Santos Pereira, Maria de Lourdes da Silva Rosa, Herbet Conceição, Anelise Losangela Bertotti   +3 more
doaj   +1 more source

Formation of Late Archean High-delta O-18 Diorites through Partial Melting of Hydrated Metabasalts

, 2018
Insight into the formation of Archean trondhjemite–tonalite–granodiorite (TTG) and sanukitoids is essential for understanding Archean crustal evolution and tectonic styles; however, their exact source and petrogenesis are still open to debate.
Bin Fu, Fu, Bin, Wang, Dan, Qian, Qing, Qing Qian, Jing-Hui Guo, Guo, Jinghui, Dan Wang   +7 more
core   +1 more source

Data for: Evolution of continental arc magmatism through igneous garnet and amphibole fractionation: Evidence from Jurassic intermediate–felsic intrusive rocks in southern Qiangtang, Tibet

, 2021
Table 1. Zircon LA-ICP-MS U–Pb dating results of diorites and the MEs in Rena Co intrusive rocks.Table 2. Major (wt%), trace and rare earth elment (ppm) analyses of diorites and the MEs in Rena Co intrusive rocks.Table 3.
Chen, W (via Mendeley Data), Chen, Wei
core   +1 more source

Petrogenesis and Tectonic Setting of Late Mesozoic Felsic Magmatic Rocks in the Wangmushan Mining District, Northern Fujian, South China

Geological Journal, EarlyView.
The rhyolitic ignimbrite and K‐feldspar granite porphyry from the Wangmushan mining district, northern Fujian yield ages of 173.8 ± 0.8 and 102.6 ± 0.4 Ma, respectively. Geochemical data, zircon trace elements, whole‐rock Sr–Nd–Pb isotope data, and zircon Hf isotopic compositions indicate that the rhyolitic ignimbrite originated from partial remelting ...
Wei Shaogang, Hong Wentao, Xiao Fan, Jin Guodong, Shi Hongyang, Ma Zhiwang, Wu Chen, Xue Yujingyang   +7 more
wiley   +1 more source

Light Element Dilution Effects on Fused Borate Glass Bead Specimens for X‐Ray Fluorescence Analysis of Igneous Rock Samples

X-Ray Spectrometry, EarlyView.
ABSTRACT Appropriate sample‐to‐flux ratios of fused borate glass bead specimens were investigated for igneous rock analyses. Severe interference of X‐ray absorption and enhancement engenders erroneous findings from X‐ray fluorescence spectrometric analyses, but light element dilution effects on glass bead specimens decrease this interference.
Kenichi Nakayama
wiley   +1 more source

The diorites of Yzerfontein, Darling, Cape Province [PDF]

, 1951
Thesis (MSc)--Stellenbosch University, 1951.This paper was awarded the Corstorphine Medal and the first prize of the Geological Society of South Africa for the year 1951.ENGLISH ABSTRACT: The recent suggestion of the existence of a basaltic magma in the ...
Maske, S
core