Results 41 to 50 of about 46,759 (117)

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

Late Mesozoic Tectonic‐Magmatic Evolution of the Tongbai Orogen, Central China: Implications for Granites Petrogenesis and Gold Mineralization

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract Late Mesozoic granitoids are widely distributed throughout the East Qinling‐Tongbai‐Dabie orogenic belt and its periphery, while large‐scale gold deposits during the same period were primarily found in the Xiaoqinling‐Xiong'ershan area, west of the Tongbai orogen.
Lei Ai, Xianquan Ping, Jianping Zheng, Yuping Su, Qiang Ma, Xianbin Shi, Tianci Huang   +6 more
wiley   +1 more source

A Tale of Evolution of the Central Indian Tectonic Zone (CITZ) With Glimpses on Pre‐Suture Plate Margin Depositional History

Geological Journal, Volume 60, Issue 2, Page 404-430, February 2025.
Present study explains the current understanding about the complex evolution of the CITZ. New zircon geochronological data from Mahakoshal Basin is used to document the pre‐suture history of the southern margin of Bundelkhand Craton where Mahakoshal Basin developed as a back‐arc basin and remained open even after 1700 Ma.
A. Sharma, P. P. Chakraborty, A. K. Pandey, K. Das   +3 more
wiley   +1 more source

Middle to Late Ordovician flare‐up of granitoids, South Altyn Tagh: Reworking of exhumed continental crust

Geological Journal, Volume 59, Issue 8, Page 2190-2207, August 2024.
U–Pb ages, and O–Hf isotopic compositions of inherited and synmagmatic zircons are addressed to trace the source rocks and petrogenesis of a monzogranite pluton, which belong to the flare‐up of granitoids at 465–445 Ma in the South Altyn Tagh. The observations indicate that this monzogranite is mainly derived from reworking of exhumed continental crust,
Ningchao Zhou, Guochun Zhao, Jinlong Yao, Qian Liu, Yigui Han, Huishan Zhang, Guangli Ren   +6 more
wiley   +1 more source

Petrology of high-Mg, low-Ti igneous rocks of the Glenelg River Complex (SE Australia) and the nature of their interaction with crustal melts

, 2004
Although commonly ascribed a mantle derivation, the nature and origin of the parental magmas of the microgranular enclaves encountered in granitic plutons is typically a matter of deduction.
Kemp, A.I.S.
core   +1 more source

Petrogenesis of Early Cretaceous granitoids and mafic microgranular enclaves from the giant Tonglushan Cu-Au-Fe skarn orefield, Eastern China

, 2021
Late Mesozoic high-K talc-alkaline and high Sr/Y granitoids related to the skam-porphyry-stratabound Cu-Au polymetallic deposits are widespread in the Middle-Lower Yangtze River Belt (MLYRB), Eastern China.
Ma, Qiang, Chu, Gaobin, Cheng, Jiamin, Long, Xiaoping, Tian, Jing, Zhang, Shitao, Chen, Huayong, Zhang, Weifeng   +7 more
core   +1 more source

Autoliths: Reinterpreting Mafic Microgranular Enclaves in Granites and their Implications [PDF]

Goldschmidt Abstracts, 2020
Rodríguez, Carmen, Castro Dorado, Antonio   +1 more
openaire   +2 more sources

The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing

Geophysical Research Letters, Volume 51, Issue 14, 28 July 2024.
Abstract This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet. These rocks share similar zircon ages as well as zircon Hf‐O and plagioclase Sr isotopes.
Mingjian Li, Yunchuan Zeng, Massimo Tiepolo, Jifeng Xu, Enrico Cannaò, Francesca Forni, Feng Huang   +6 more
wiley   +1 more source

Sr-Nd isotope geochemistry of the early Precambrian sub-alkaline mafic igneous rocks from the southern Bastar craton, Central India [PDF]

, 2009
Sr–Nd isotope data are reported for the early Precambrian sub-alkaline mafic igneous rocks of the southern Bastar craton, central India. These mafic rocks are mostly dykes but there are a few volcanic exposures.
Ellam, R.M., Ellam, Rob M., Gautam, Gulab C., Srivastava, R.K., Gautam, G.C., Srivastava, Rajesh K.   +5 more
core   +1 more source

Cogenetic origin of mafic microgranular enclaves in calc-alkaline granitoids: The Permian plutons in the northern North China Block [PDF]

Geosphere, 2017
Mafic microgranular (microgranitoid) enclaves (MMEs) with fine-to medium-grain–size igneous microstructures are abundant in Permian granitoid plutons in the northern North China Block (NCB). They are mainly dioritic in composition with SiO 2 contents from 51.0 wt% to 62.7 wt% and are contiguous with their host granitoids (SiO 2 = 60.4–68.4 wt ...
Shuan-Hong Zhang, Yue Zhao
openaire   +1 more source