Geochemical Characteristics and Tectonic Implications of Karamaili Jiangbasitao Formation Volcanic Rock in Xinjiang
详细信息   
摘要

///Geochemical characteristic and the chart of tectonic of volcanic rocks and dating of high-precision geochronology in Karamaili Jiangbasitao Formation of Xinjiang were studied. The results showed that there were typical bimodal volcanic rocks of Jiangbasitao Formation, which included basalt-acid volcanolastic rock-basaltic trachyte andesite; LA-ICP-MS U-Pb zircon age of basaltic trachyte andesite was (319.8±2)Ma, and indicated that the volcanic rocks of Jiangbasitao Formation formed in Serpukhovian Stage of Early Carboniferous. In general, the volcanic rocks of Jiangbasitao Formation formed in the post-collisional extension setting after Karamaili ocean basin closed, and there was post-collisional continent extension setting at the late stage of Early Carboniferous in Karamaili Region. 

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