Results 21 to 30 of about 10,371 (176)

Petrography, geochemistry and tectonic setting of ‎Hanar granitoids (south of Birjand): a signature for magmatism ‎identification of east of Lut block [PDF]

پترولوژی, 2018
The Hanar granitoids, geographically located 155 km south of Birjand in the east of Iran. Geologically, It belongs to the Lut block volcanic–plutonic belt and occurs near to the Lut block-Sistan suture zone border. The granitoid rocks consist of tonalite,
Siavash Omidianfar, Mohammad Rahgoshay, Iman Monsef   +2 more
doaj   +1 more source

FEDOROVSKY, VALENTIN S. – THE CORYPHAEUS OF SIBERIAN GEOLOGY

Геодинамика и тектонофизика, 2015
The publication is devoted to the 80 anniversary of Valentin S. Fedorovsky, the coryphaeus of Siberian geology.
Eugene V. Sklyarov, Anatoly M. Mazukabzov, Dmitry P. Gladkochub, Tatiana V. Donskaya, Arkady M. Stanevich   +4 more
doaj   +1 more source

AGE AND COMPOSITION OF THE EARLY PALEOZOIC MAGMATIC ASSOCIATIONS AND RELATED RARE-ELEMENT PEGMATITES IN THE SOUTH-EASTERN PART OF THE SANGILEN BLOCK, TUVA-MONGOLIAN MASSIF

Геодинамика и тектонофизика, 2021
The article presents new data on ages (U-Pb zircon dating, SIMS SHRIMP-II) and chemical compositions of rocks from gabbro-granitic and granite-leucogranitic magmatic associations.
L. G. Kuznetsova, S. P. Shokalsky, S. A. Sergeev, S. I. Dril   +3 more
doaj   +1 more source

High-K, I-type Tonian post-collisional magmatism in the South Delhi Terrane, NW India: Petrogenetic and tectonic implications

Geosystems and Geoenvironment
The limited whole-rock geochemical data of the granitoids exposed in the southern domain of the South Delhi Terrane, Aravalli orogen, northwestern India characterised these rocks as subduction-related continental arc I-type granites.
Manisha, Parampreet Kaur, Naveen Chaudhri   +2 more
doaj   +1 more source

Dharwad Granitoids

, 2020
Bulk-rock geochemical data of Dharwar Granitoids.The Dharwad granitoids are intermediate to felsic in composition with a narrow range of silica, low to moderate potassium and considerably higher sodium oxides. They have moderate to higher alumina content
Boraiaha, C (via Mendeley Data)
core   +1 more source

Geological and isotopic characteristics of granites from the Western Pernambuco-Alagoas Domain: implications for the crustal evolution of the Neoproterozoic Borborema Province

Brazilian Journal of Geology
The Western Pernambuco-Alagoas Domain is a complex tectonic domain of the Southern part of the Neoproterozoic Borborema Province. It borders the Northern margin of São Francisco Craton. U-Pb and Sm-Nd data discussed in this work show that, in the Western
Rodrigo Fabiano da Cruz, Márcio Martins Pimentel, Ana Cláudia de Aguiar Accioly, Joseneusa Brilhante Rodrigues   +3 more
doaj   +1 more source

Granitoids of Sanandaj-Sirjan Zone that are concurrent with Cimmerian Orogeny (178-160 Ma) belong to ilmenite series (S-type): investigation of reason for lacking the porphyry tin mineralization

Journal of Economic Geology, 2021
ntroduction The granitic rocks are divided into magnetite and ilmenite series (Ishihara 1977), coinciding spatially with the I-type (εNdi0; (87Sr/86Sr)i~0.704-0.706) and S-type granites (εNdi0.707, N-MORB normalized patterns with enrichment in Low- and ...
Mohammad Hassan Karimpour, Nargess Shirdashtzadeh, Martiya Sadeghi   +2 more
doaj   +1 more source

Late Pleistocene Volcanic Rocks From Tengchong Volcanic Field at SE Tibetan Plateau: Constraints on Petrogenesis and Mantle and Crustal Processes

Geological Journal, EarlyView.
Early zircon saturation and crystallisation occur in mafic (52–54 wt.% SiO2) lavas at Tengchong volcanic field. These early formed zircons with high δ18O (6.6‰–7.9‰) indicates mantle enrichment by subducted supracrustal materials. ABSTRACT Late Pleistocene (< 0.2 Ma) mafic and evolved volcanic rocks occur in northern Tengchong Volcanic Field, SE ...
Lizhu Wang, Haibo Zou
wiley   +1 more source

Geochemical Characteristics of the Hida Granitoids in the Unazuki and Katakaigawa Areas, Central Japan

Geosciences
The Hida Belt in central Japan is a key geological unit for understanding the crustal growth of the Eurasian continent in the Mesozoic. However, while previous studies have focused primarily on geochronology, the geochemical characteristics of its rocks ...
Kazuki Oishi, Rui Kuwahara, Kazuya Shimooka, Motohiro Tsuboi   +3 more
doaj   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source