地质与资源2018，Vol.27Issue(2)：117-123,7.
青海省中灶火地区鄂拉山组火山岩地球化学特征及构造环境
GEOCHEMISTRY AND TECTONIC ENVIRONMENT OF THE VOLCANIC ROCKS FROM ELASHAN FORMATION IN ZHONG JUH AREA,QINGHAI PROVINCE
摘要
Abstract
Study on the volcanic rocks from Elashan Formation in Zhong Juh area, Qinghai Province, indicates that it belongs to acid-intermediate high-K and low-Ti calc-alkali series. The analysis results reveal that ∑REE varies from 139.45×10-6to 219.55×10-6,with enrichment of LREEs(LREE/HREE of 7.695-13.46,averagely 9.09).The distribution patterns show gently right-dipping smooth curves with weak negative Eu anomaly(δEu=0.53-0.83). The general uniformity of trace element curve patterns reflects the homogeneity of volcanic rocks in this area. According to the analysis on tectonic environment, it is concluded that the volcanic rocks is the product of magmatic arc formed by compression and collision.关键词
鄂拉山组火山岩/地球化学特征/构造环境/中灶火地区/青海省Key words
volcanic rock of Elashan Formation/geochemical characteristics/tectonic environment/Zhong Juh area/Qinghai Province分类
天文与地球科学引用本文复制引用
赵明福,史连昌,李成福,魏有宁,李玉龙..青海省中灶火地区鄂拉山组火山岩地球化学特征及构造环境[J].地质与资源,2018,27(2):117-123,7.基金项目
青海省地质勘查基金项目"青海省昆仑河地区1:5万矿调多元地质信息集成与找矿预测"(编号2016020021jc021). （编号2016020021jc021）
