Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Petrogenesis of the Microgranular Enclaves and Their Host Granites from the Xitian Intrusion in South China: Implications for Geodynamic Setting and Mineralization
Minerals ( IF 2.2 ) Pub Date : 2020-11-26 , DOI: 10.3390/min10121059 Miao He , Qing Liu , Quanlin Hou , Jinfeng Sun , Quanren Yan
Minerals ( IF 2.2 ) Pub Date : 2020-11-26 , DOI: 10.3390/min10121059 Miao He , Qing Liu , Quanlin Hou , Jinfeng Sun , Quanren Yan
The South China Block had experienced a significant tectonic transition during the Mesozoic in response to the subduction of the Paleo- and the Pacific Ocean. Large-scale granitic intrusions with massive mineralization are widespread in South China, and their tectonic settings are not defined. The Xitian intrusion is ideal for probing the geodynamic setting and mineralization in South China because they comprise an abundance of microgranular enclaves (MEs) and diverse types of granite associated with mineralization. Age determined by zircon U-Pb dating suggests that the MEs and their host granites are coeval within error, of ca. 152 Ma. The MEs have a similar initial Hf-O isotopic composition as host granites, and the rapid cooling mineral textures indicate that they are autoliths. Geochemical data show that the host granites are high-K, calc-alkaline, and transitional from metaluminous to peraluminous, slightly enriched in light rare earth elements (LREEs) relative to heavy rare earth elements (HREEs), with obvious negative Eu anomalies, belonging to I-type. The Nb/Ta and Zr/Hf ratios indicate the volatile penetrates the magmatic-forming process, and the fluid with abundant volatile could extract metal element effectively from the mantle.
更新日期：2020-11-27
京公网安备 11010802027423号