Analysis of Environment for Late Triassic Volcanic Rocks in Chachaxiangka, Elashan

Through study on Petrology of the Late Triassic volcanic rocks from Chachaxiangka area,the volcanic rocks belong to Elashan Formation and are calc-alkaline series.Considering the tectonic setting of intra-continental orogenic environment,the Late Triassic volcanic rocks initially may form in the continental marginal environment.Researched area and even Elashan area produced a series of right rotary sliding fault zone because "A" type subduction.Affected by northwestern Right-lateral strike slip fault zone,rock pore increased and strongly heat flow activities appears coursing magma spray out surface along these fault zone.