Results 31 to 40 of about 48,430 (124)

Triaxial Compression Testing of Multicomponent Geomaterials from Quartz-Poor (Syenitic) Systems

GeoScience Engineering, 2017
This paper focuses on mafic microgranular enclaves enclosed in quartz-poor igneous rocks and their effect on strength properties of the rock massif. The study examines host rock–enclave multicomponent geomaterials from enclave-bearing syenitic rocks from
Krmíček Lukáš, Závacký Martin
doaj   +1 more source

Top-down structures of mafic enclaves within the Valle Fértil magmatic complex (Early Ordovician, San Juan, Argentina) [PDF]

, 2008
Magmatic structures related to the mechanical interaction between mafic magmas and granitoids have been studied in the Valle Fértil calc-alkaline igneous complex, Argentina.
Viñao, A., Martino, Roberto Donato, Pinotti, Lucio Pedro, D'Eramo, Fabiana, Otamendi, Juan E., Castro Dorado, Antonio, Vujovich, G., Vujovich, Graciela I., Tibaldi, Alejandro, Tibaldi, A., Viñao, Aldana, Pinotti, Lucio P., Tibaldi, Alina M., Martino, R., Otamendi, J., Pinotti, L. P., D'Eramo, F. J., D’Eramo, Fernando J., Vujovich, Graciela, Otamendi, Juan Enrique   +19 more
core   +1 more source

Possible genetic relationship between Mesozoic magmatic rocks and gold mineralization in the Jiaodong Peninsula (Eastern China): constraints of magmatic evolution and physicochemical conditions

Frontiers in Earth Science, 2023
The Jiaodong Peninsula is China’s largest gold province and the third largest in the world. Although gold mineralization is associated with Mesozoic granites temporally and spatially, the specific genetic association remains unclear, leading to ambiguity
Jian Li, Jian Li, Jian Li, Chang-Guo Dai, Chang-Wei Wang, Chang-Wei Wang, Ming-Chun Song, Chang-Jiang Wang, Chang-Jiang Wang, Shi-Yong Li, Run-Sheng Wang, Hong-Jiang Shi, Kai-Lei Xu, Ping Wang   +13 more
doaj   +1 more source

Amphibole crystallization conditions as record of interaction between ultrapotassic enclaves and monzonitic magmas in the Glória Norte Stock, South of Borborema Province

Brazilian Journal of Geology, 2020
The Glória Norte Stock (GNS) is made up of predominantly porphyritic biotite- amphibole-bearing quartz monzonite, enclosing a large number of microgranular mafic enclaves (MME).
Vinícius Anselmo Carvalho Lisboa, Herbet Conceição, Maria Lourdes Silva Rosa, Gisele Tavares Marques, Cláudio Nery Lamarão, André Luiz Rezende Lima   +5 more
doaj   +1 more source

Interaction of the lithospheric mantle and crustal melts for the generation of the Horoz pluton (Niğde, Turkey): whole-rock geochemical and Sr–Nd–Pb isotopic evidence [PDF]

Estonian Journal of Earth Sciences, 2016
The Horoz pluton includes granitic and granodioritic rocks, with widespread mafic microgranular enclaves (MMEs). Petrochemically, the rocks of the pluton show calc-alkaline to shoshonitic and metaluminous to slightly peraluminous composition.
Kerim Kocak, Veysel Zedef
doaj   +1 more source

Determination of physicochemical conditions and role of fluids in evolution of Geysour granitoid (eastern Gonabad), using biotite mineral chemistry

Journal of Economic Geology, 2021
Introduction The chemical composition of biotite in mineralization associated with granitoids and copper porphyry deposits is sensitive to several chemical and physical factors.
Ahmad Ahmadi Khalaji , Abdolsamad Pourmohammad , Mohammad Ebrahimi , Masoud Homam, Rasoul Esmaeili   +4 more
doaj   +1 more source

Subduction Recycling and Closure of the Paleo‐Asian Ocean in the Beishan Orogen: Constraints From the Niujuanzi Ophiolitic Mélange and Associated Intrusions

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Ophiolitic mélanges and associated intrusions provide key archives for reconstructing the evolution of ancient ocean basins and subduction‐related mantle modification. The Hongliuhe–Niujuanzi–Xichangjing ophiolitic mélange in the central Beishan Orogen preserves important records of the Paleo‐Asian Ocean, but the timing of oceanic subduction ...
Yujia Song, Xijun Liu, Yao Xiao, Honghu Zeng, Pengde Liu   +4 more
wiley   +1 more source

Mineral and Whole-rock Geochemistry of the Kestanbol Granitoid (Ezine-Canakkale) and its Mafic Microgranular Enclaves in Northwestern Anatolia: Evidence of Felsic and Mafic Magma Interaction

, 2010
The Miocene Kestanbol granitoid, in Ezine-Canakkale, Turkey, is one of post-collision granitoids of western Anatolia, which have been related to the the late Cretaceous collision between the Anatolide-Tauride platform and the Pontides.
Goker, A. Feti, Gungor, Yildirim, Orgun, Yueksel, Gültekin, Ali Haydar, Karacık, Zekiye, Sahin, Sabah Yilmaz, Gungor, Yıldırım, GÜLTEKİN, A. HAYDAR, Karacik, Zekiye, Yılmaz Sahin, Sabah, ÖRGÜN, YÜKSEL, SABAH YILMAZ ŞAHİN, A. HAYDAR GÜLTEKİN, A. FETİ GÖKER, YILDIRIM GÜNGÖR, ZEKİYE KARACIK, YÜKSEL ÖRGÜN   +16 more
core   +1 more source

The Wilson Cycle of the North Altyn Ocean: A Record of Subduction Initiation, Slab Rollback, and Final Closure

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The North Altyn ophiolitic belt was formed by the subduction–closure of the Altyn segment of the Proto–Tethys Ocean and recorded the accretion of Tarim to northern Gondwana, but the timing of initial subduction and detailed tectonic transition processes remain poorly constrained. This study reports the oldest Phanerozoic magmatic record of 537 
Long Chen, Jinlong Yao, Guochun Zhao, Yigui Han, Qian Liu, Donghai Zhang, Xijun Zhao, Hang Yang, Wei Li   +8 more
wiley   +1 more source

Role of Post‐Collisional Magmatism in Continental Growth and Reworking Since the Late Archean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The mechanisms responsible for the formation and compositional evolution of continental crust remain central questions in Earth science. Post‐collisional magmatism is widely preserved in the continental record; however, its contribution to crustal growth may be underestimated because enriched isotopic signatures obscure juvenile mantle input ...
Dongjian Ouyang, Ross N. Mitchell, Peng Peng, Jinghui Guo, Qiuli Li   +4 more
wiley   +1 more source