地质通报2016，Vol.35Issue(7)：1106-1114,9.
大兴安岭北部下侏罗统战备村组的建立及其地质意义
The establishment of the Lower Juras-sic Zhanbeicun Formation in northern Da Hinggan Mountains and its geological significance
摘要
Abstract
The Zhanbeicun area in northern Da Hinggan Mountains develops a suite of volcanic rocks. The rock assemblages of the Zhanbeicun Formation are mainly a suite of light gray-gray rhyolitic pyroclastic rocks, rhyolitic lava, clastic lava with a small amount of volcanic tuff. On the basis of 1∶50000 regional geological mapping, the authors found that the lower part of the formation covers Late Triassic monzonitic granite by angular unconformity, and the upper part of the formation is covered by Middle-Later Jurassic Tamulangou Formation by parallel unconformity. The zircon U-Pb isotopic age of Zhanbeicun Formation is about 178~192Ma, sug⁃gesting Early Jurassic. According to the rule of“formation”establishment in Stratigraphic Guide of China, the Zhanbeicun Formation is chosen as stratotype and established as Zhanbeicun Formation. The establishment of the Lower Jurassic stratigraphic unit has impor⁃tant geological significance for the study of early Mesozoic volcanic-tectonic magmatic activity in Da Hinggan Mountains and strati⁃graphic classification and correlation of Mesozoic volcanic rocks.关键词
地层新建/下侏罗统/战备村组/大兴安岭Key words
strata establishment/Lower Jurassic/Zhanbeicun Formation/Da Hinggan Mountains分类
天文与地球科学引用本文复制引用
郑吉林,王文东,杨华本,梁中恺,魏小勇,闫永生,怀宝峰,贺小明..大兴安岭北部下侏罗统战备村组的建立及其地质意义[J].地质通报,2016,35(7):1106-1114,9.基金项目
中国地质调查局项目 （）
