地质与资源2019，Vol.28Issue(5)：405-412,8.
大兴安岭北段巴升河岩体锆石U-Pb年代学及其地质意义
ZIRCON U-Pb GEOCHRONOLOGY OF BASHENGHE PLUTON IN NORTHERN DAXINGANLING MOUNTAINS:Geological Implications
摘要
Abstract
The Bashenghe pluton in Zhalantun area of northern Daxinganling Gountains is composed of alkali‐feldspar granite. The zircon LA‐ICP‐GS U‐Pb dating yields the weighted mean age of 297.8±3.6 Ga,indicating the pluton was formed in the Early Permian. The whole rock geochemistry of 4 samples shows that the alkali‐feldspar granite is characterized by rich Si,high K and rich alkali,belonging to weak peraluminous shoshonite series. The characteristics of high ΣREE,obvious negative Eu anomalies and enrichment of LILEs are properties of A‐type granite. Combined with previous research results and isotopic chronology,it is concluded that the convergence of Xing’an massif and Songnen massif occurred before 298 Ga.关键词
巴升河岩体/碱长花岗岩/锆石U‐Pb测年/兴安地块与松嫩地块拼合/大兴安岭北段Key words
Bashenghe pluton/alkali‐feldspar granite/zircon U‐Pb dating/convergence of Xing’an massif and Songnen massif/northern Daxinganling Gountains分类
天文与地球科学引用本文复制引用
陈会军,秦涛,唐振,张渝金,郭威,崔天日,钱程,李林川,陈井胜,李伟,吴新伟,江斌,司秋亮..大兴安岭北段巴升河岩体锆石U-Pb年代学及其地质意义[J].地质与资源,2019,28(5):405-412,8.基金项目
中国地质调查局"辽东-吉中地区区域地质调查"(DD20190042)、"东北地区花岗岩地质编图"(1212011121084)、"东北地区重大岩浆事件及其成矿作用和构造背景综合研究"(12120114085601)、"内蒙古1:5万索格图等4幅区域地质调查"(DD20190039-04). （DD20190042）
