Geochronology and geochemistry of Early Mesozoic acid volcanic rocks from Southwest Guangxi: Constraints on tectonic evolution of the southwestern segment of Qinzhou-Hangzhou joint belt.
桂西南早中生代酸性火山岩年代学和地球化学:对钦-杭结合带西南段构造演化的约束

Early Mesozoic acid volcanic rocks are exposed dominantly in the southwestern segment of Qinzhou-Hangzhou joint belt, and are mainly distributed in both sides of the Shiwandashan Mesozoic-Cenozoic basin. The volcanic rocks of Lower and Middle Triassic Beisi Formation are exposed in northwest side of the basin, which consists of alternating volcanic succession of felsic lavas (basaltic andesite-dacite-rhyolite) interlayered with pyroclastic rocks (dominantly agglomerate lava, breccia lava, tuffolava, breccia...