地质通报2016，Vol.35Issue(9)：1472-1478,7.
西藏白朗南部地区三叠纪地层沉积环境及物源
Depositional setting and provenance analysis of Triassic nappe in the south of Bailang County, Tibet
摘要
Abstract
Outcrop section, sandstone clastic composition, geochemistry and cathodoluminescence images are comprehensively stud⁃ied so as to analyze the depositional setting and provenance of Triassic nappe in the south of Bailang County, Tibet. Through field geological survey, the authors found that the lithology is composed of black mudstone, gray quartz sandstone, feldspar-quartz sand⁃stone and gray limestone. The depositional background displays a neritic-bathyal environment in the Lagangguiri passive continental margin basin. Clastic composition and geochemistry indicate that the provenance was mainly derived from the craton basin. Cathodo⁃luminescence images prove possibility of metamorphic, igneous rock sources. It is thus concluded that the strata consist of Lower-Middle Triassic Lücun Formation and Upper Triassic Niru Formation, with the provenance derived from the southern Higher Hima⁃laya basement complex rock belt.关键词
西藏白朗南部/三叠纪地层/沉积环境/地球化学/阴极发光/物源分析Key words
the South of Bailang County, Tibet/Triassic strata/depositional environment/geochemistry/Cathodoluminescene/prov-enance analysis分类
天文与地球科学引用本文复制引用
程俊,石卫刚,翟杰,李海波,刘江华..西藏白朗南部地区三叠纪地层沉积环境及物源[J].地质通报,2016,35(9):1472-1478,7.基金项目
中国地质调查局项目 （）
