Results 101 to 110 of about 8,065 (232)

Petrogenesis of the Lalezar granitoid intrusions (Kerman Province - Iran) [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2015
The Lalezar granitoids crop out within volcanic successions of the Urumieh-Dokhtar Magmatic Assemblage (UDMA). These granitoids have a range from gabbro-diorites to granites in composition.
S. M. Niktabar   +4 more
doaj  

Highlights on Geochemical Changes in Archaean Granitoids and Their Implications for Early Earth Geodynamics

open access: yesGeosciences, 2018
The Archaean (4.0–2.5 Ga) continental crust is mainly composed of granitoids, whose geochemical characteristics are a function of their formation mechanisms and components, as well as physical conditions of their source.
Jaana Halla
doaj   +1 more source

On the Origin of Certain Granitoid Rocks [PDF]

open access: yesNature, 1879
DR. CALLAWAY'S interesting letter with the above heading in NATURE (vol. xx. p. 219) tempts me to send you the following paragraph from my paper in the Quart. Journ. Geolog. Soc. for May, p. 286, an which the halleflintas of the Arvonian there mentioned are first described:—
openaire   +2 more sources

Geochemistry of granitoids from Castelo Branco, Central Portugal [PDF]

open access: yes, 2004
Só está disponível o resumoGeochemistry of granitoids from Castelo Branco, Central ...
Silva, M.M.V.G.   +2 more
core  

Magmatic and tectonic history of Jurassic ophiolites and associated granitoids from the South Apuseni Mountains (Romania) [PDF]

open access: yes, 2016
The Jurassic ophiolites in the South Apuseni Mountains represent remnants of the Neotethys Ocean and belong to the East Vardar ophiolites that contain ophiolite fragments as well as granitoids and volcanics with island-arc affinity. New U–Pb zircon ages,
Gallhofer,Daniela   +5 more
core   +1 more source

Сomposition and mineralogy of granitoids of the Ob-Zaisan folded region in the context of the prediction of groundwater radioactivity

open access: yesГорные науки и технологии
The presented research is carried out in continuation of the works connected with studying the nature of radioactivity of drainage waters of quarries of Novosibirsk region, performed by the Laboratory of Hydrogeology of Sedimentary Basins of Siberia ...
Vasiliy P. Sukhorukov   +3 more
doaj   +1 more source

Geochronology of Portuguese granitoids: a contribution [PDF]

open access: yes, 1983
Geochronological data (Rb-Sr method, \87Rb = 1.42 x 10"n/y) relative to eight granitoid bodies, of which five form part of a zoned pluton (Castro Daire area, Northern Portugal), show this pluton as a multi-pulse intrusion and define four age groups (ca ...
Serrano Pinto, M.
core  

Granitoid intrusion into the VGP News

open access: yesEos, Transactions American Geophysical Union, 1990
The VGP News is intended to stimulate fruitful thought in important areas of volcanism, petrology, and geochemistry. To achieve this aim, the February and May editions of VGP News are dedicated to a two‐part debate on the origin of anatectic granitoids.
openaire   +1 more source

Overlapping Sr-Nd-Hf-O isotopic compositions in Permian mafic enclaves and host granitoids in Alxa Block, NW China: Evidence for crust-mantle interaction and implications for the generation of silicic igneous provinces [PDF]

open access: yes, 2015
In general, the mantle provides heat and/or material for the generation of the silicic igneous provinces (SIPs). The rarity of mafic microgranular enclaves (MMEs), however, hampers understanding of the mantle's role in generating SIPs and the process of ...
Liu, Yu   +9 more
core   +1 more source

Zircon in granitoids from Sinai, Egypt and its genetic significance [PDF]

open access: yes, 1985
The granitic plutonism in the area around Wadi El-Sheikh, southwestern Sinai, Egypt is mainly represented by the Older and Younger Granitoid Rocks.
Salem Abdel-Karim Ahmed   +2 more
core  

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