黑龙江宁安英城子热液金矿床与成矿伴生的辉绿玢岩的锆石U-Pb年龄及其地质意义  

Zircon U-Pb dating of associated diabase prophyrite with Yingchengzi hydrothermal gold deposit in Ning'an, Heilongjiang and their geological significance

作　　者：陈行时[1] 聂喜涛[1] 孙景贵[1] 王清海[2] 郭佳[1] 赵雨君[1] 张朋[1] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]吉林大学东北亚国际地学研究与教学中心,长春130026

出　　处：《世界地质》2010年第2期211-217,共7页World Geology

基　　金：国家自然科学基金项目(40472050;40772052);黑龙江省地球物理勘察院合作项目(3J106H424422)联合资助

摘　　要：英城子热液金矿床产于张广才岭岩浆构造带东侧的早古生代花岗岩岩体内的韧脆性剪切带中。矿区内出露的辉绿玢岩中锆石的SHRIMPU--Pb测年结果表明:16个单颗粒锆石的谐和年龄值可划分为4组,分别为849.7～897.0Ma、755.6±19.2Ma、486～514.0Ma和419～451Ma。结合锆石的特征和相关地质测年结果,初步认为辉绿玢岩岩浆作用发生在麻山期或加里东期陆内造山后的地壳伸展环境内(432Ma);该区在晚元古代和早古生代属于佳木斯地块的一部分或地壳演化与佳木斯地块、额尔古纳地块处于相同的地质环境中。Yingchengzi hydrothermal gold deposit is located in the ductile-brittle shear zone of Early Paleozoic granite body from the east of Zhangguangcailing magma tectonic belt. The zircon SHRIMP U-Pb dating of diabase porphyrite cropout in the mine field indicates that the concordant ages of 16 single-grain zircons can be divided into four groups,including 849. 7 ～ 897. 0 Ma,755. 6 ± 19. 2 Ma,486 ～ 514. 0 Ma and 419 ～ 451 Ma. Combining with zircon characteristics and related geological dating data,the authors preliminarily confirm that the magmatism of diabase porphyrite occurred in continental post orogenic extensional setting （432 Ma） of Mashan or Caledonian periods. This area belongs to a part of Jiamusi Massif in Late Proterozoic and Early Paleozoic,or its crustal evolution was in the same environment as Jiamusi and Ergun massifs.

关 键 词：锆石U--Pb年龄 辉绿玢岩 英城子金矿床 宁安 黑龙江 

分 类 号：P597[天文地球—地球化学]