华南地质与矿产Issue(4)：319-327,9.DOI:10.3969/j.issn.1007-3701.2014.04.003
青海南部治多县扎河一带上三叠统巴塘群火山岩特征及其构造环境
Geochemical characteristics and its tectonic significance of Upper Triassic Batang group volcano rocks in Zhahe area, Zhiduo County, Southern Qinghai Province
摘要
Abstract
Batang group volcano rock is mainly composed of basalt-andesite rhyolite, formed from a set of basic to neutral to acidic rock combination, with the sequence evolution is more complete. Petrochemistry showed low TiO2 (less than 1 wt%), high Al; the characteristics of rare earth elements showed enrichment of light rare earth ele-ments; in the trace element geochemistry, the performance for the enrichment of large ion lithophile elements, de-pleted in high field strength elements, εNd (t) is -0.3 ~ 2.9, εSr (t) is 14.4 ~ 39.2, all the above geochemical characteristics indicate those rocks were formed in volcano arc environment, is product of the Lazhulong- Jinsha River ocean (or Ganzi-Litang ocean) southward subduction.关键词
三叠纪/巴塘群/火山岩/构造环境/扎河/羌塘东部Key words
The Triassic Batang group/volcano rock/tectonic environment/Zhahe area, Eastern Qiangtang引用本文复制引用
白云山,牛志军,段其发,赵小明,汤朝阳..青海南部治多县扎河一带上三叠统巴塘群火山岩特征及其构造环境[J].华南地质与矿产,2014,(4):319-327,9.基金项目
中国地质调查局项目“湘中页岩气资源远景调查” （）
