河南嵩县康达萤石矿Sm-Nd同位素年龄及地质意义  

Sm-Nd Isotopic Dating and Geological Significance of Kangda Fluorite Deposit in Songxian County of Henan Province

作　　者：庞绪成[1] 司媛媛 刘纪峰[2] 董文超[1] 梁贞[2] PANG Xu-cheng;SI Yuan-yuan;LIU Ji-feng;DONG Wen-chao;LIANG Zhen(Institute of Resources and Environment,Henan Polytechnic University ,Jiaozuo Henan 454000,China;No 2 Institute of Geological & Mineral Resources Survey of Henan,Zhengzhou 450002 ,China)

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]河南省地质矿产勘查开发局第二地质矿产调查院,郑州450002

出　　处：《矿物岩石地球化学通报》2019年第3期534-538,共5页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国地质调查局科研项目(12120114035401);河南省“探矿权、采矿权”项目(2015-05)

摘　　要：河南嵩县康达萤石矿位于华北地台南缘,为秦岭多金属和非金属成矿带嵩县西南部车村萤石矿集区。为确定该矿床的成矿时代,为矿床成因研究和找矿勘探提供依据,采用MC-ICP-MS对矿床主成矿期的萤石进行了Sm-Nd同位素测年。结果表明,萤石样品的等时线年龄为(123±9.1) Ma,表明矿床形成于早白垩世,该年龄与合峪复式岩体的末次侵位年龄(127±14)Ma接近;萤石的εNd(t)为-15. 9,与合峪岩体的εNd(t)为-17.4^-11.2也相近,暗示矿床与合峪岩体的密切成因联系,并与这一时期区域上发生的大规模成矿时代及燕山期岩浆侵入事件相一致。The Kangda fluorite deposit located in the Checun fluorite ore concentration area,southwestern Songxian county,southern margin of the North China Craton. It is in the Qinling polymetallic and non-metallic metallogenic belt. In order to determine the formation age of the deposit and provide the basis for the study of the genesis and prospecting of the deposit,Sm-Nd isotope dating of fluorite from the main metallogenic stage of the deposit was carried out by MC-ICP-MS.The Sm-Nd isotope of fluorite yield the isochron age of( 123±9. 1) Ma,indicating that the main ore-forming age was the Early Cretaceous. The age is close to the last emplacement age of the Heyu complex( 127±14) Ma;The εNd( t) value(-15. 9) of fluorite is similar to the εNd( t) value(-17. 4^-11. 2) of the Heyu granite,suggesting that the mineralization is closely related to the Heyu granite,possibly linked with with the large-scale metallogensis and magmatism during the Yanshanian.

关 键 词：SM-ND等时线年龄 萤石矿 河南嵩县 

分 类 号：P597[天文地球—地球化学]