Heavy Mineral Assemblages and Provenance Analysis of the Upper Triassic in Renbu Area, Southern Tibet, China
摘要
Provenance of the Upper Triassic Langjiexue Group and Nieru Formation in Renbu area, southern Tibet was analyzed by heavy mineral association and index methods. The results indicate that common heavy minerals found in the Upper Triassic are mainly zircon, apatite, rutile, anatase, and tourmalin, both of the ZTR and ATi indexes from the mineral association are high, the MZi index is low but can be observed frequently, and the GZi index is low and sometimes zero, for Langjiexue Group, ZTR is inversely proportional to ATi indexes, but it is independent from the Nieru Formation sandstones.