In this paper, sandstone petrology, paleocurrents, whole geochemistry and published lithofacies palaeogeography data are integrated to investigate the provenance of Late Triassic Rhaetian strata from the E’mei region, SW China. Based on this, the main conclusions are listed as follows：The detrital components of sandstone from E’mei Chuanzhu section in southwestern Sichuan suggests that the Late Triassic Rhaetian sediments in E’mei region had a low mature components and multiple sources came from the recycling orogenic belts. Statistical data for paleocurrents exhibit that the sediments of Xujiahe Formation mainly came from eastern-southeastern and northeastern Sichuan, sparingly from the southwestern and northwestern Sichuan. Geochemical characteristics of sandstones from Xujiahe Formation show low maturity of major elements and reflect the Xujiahe Formation deposited under the tectonic settings of passive and active continental margin, and are similar ratios of relative trace and rare elements to the recycled sediments sourced mainly from Pre-Triassic meta-sediments of Panxi and Dianqian regions in Yangtze Craton, Jiangnan-Xuefeng thrust belt, Pre-Mesozoic metamorphic and sedimentary rocks of Qinling orogen, Neoproterozoic metamorphic rocks of Khamdian paleoland and Triassic sediments of Longmenshan thrust belt. Combined with the sandstone petrology, paleocurrents, geochemistry and published palaeogeography data, we propose that the Late Triassic Rhaetian sedimentary rocks of Xujiahe Formation in E’mei region shed mainly from Jiangnan-Xuefeng thrust belt and Qinling orogen, and sporadically from Khamdian paleoland and Longmenshan thrust belt. The Southwest Sichuan formed a marine and continental alternative depositional and terrestrial basin mainly controlled by Jiangnan-Xuefeng thrust belt and Qinling orogen during the Xujiahe Period in the Later Triassic.
Zhu Min Chen Hanlin Meng Lifeng Zhou Jing Zhang Yong Yang Shufeng Kong Fanli. Geochemistry of clastic rocks from the Late Triassic Rhaetian Xujiahe Formation of E’Mei region in southwestern Sichuan, upper Yangtze and its implication for the provenance and tectonic setting[J]. Chinese Journal of Geology, 2019, 54(1): 95-113.