黑龙江伊春三兴山矿床基本特征及构造意义  

Heilongjiang Yichun three mountain deposit, basic characteristics and tectonic significance

作　　者：任龙[1] 谢凯 曲学臣 郭伟 臧新永 牟福权 娄雨雷 REN Long;XlE Kai;QU Xue-chen;GUO Wei;ZANG Xin-yong;MU Fu-quan;LOU Yu-lei(The 1st Gold Detachment of Chinese Armed Police Force,Mudanjiang 157021,China;China Geological Survey Cores and Samples Center of Land ＆ Resources,Beijing 065201,China)

机构地区：[1]武警黄金第一支队,黑龙江牡丹江157021 [2]国土资源实物地质资料中心,北京065201

出　　处：《世界有色金属》2017年第18期249-251,共3页World Nonferrous Metals

基　　金：中国地质调查局地质调查项目12120113072600资助

摘　　要：通过对三兴山黑云母花岗岩进行矿物学、矿体地球化学及锆石U-Pb年代学进行研究,探讨其成因机制、原岩来源及构造意义。文中SHRIMP U-Pb年龄数据显示三兴山矿山侵位约为190Ma,与伊春其他地区(如上游新村等)基本同期。三兴山矿山岩性为似斑状黑云母二长花岗岩,局部为(微)细粒斑状黑云母二长花岗岩,含特征矿物普通角闪石,无白云母,具有高SiO_2(71.59%-78.24%)、高K_2O(2.64%-5.18%)、和低P_2O_5特征,铝饱和指数(A/CNK)为1.04-1.16,富集K、Th、U、Pb,不同程度的亏损Ti、Nb、P、Sr、Eu等,属准铝质到过铝质高分异I型花岗岩类;结合区域地质背景分析,表明三兴山矿山的形成可能与西伯利亚板块和华北板块对接后的伸展作用有关。Through the study of mineralogy of biotite granite mountain, three ore geochemistry and zircon U-Pb chronology, explore its formation mechanism, the original source rocks and tectonic significance. The SHRIMP U-Pb age data show Sanxing mountain emplacement is about 190Ma, Yichun and other areas （such as the upstream Village） basic period. Three mountain lithology is porphyritic biotite granite two, partial （micro） fine grained porphyritic biotite granite two, containing minerals hornblende, no muscovite, with high SiO2 （71.59%-78.24%）, K20 （2.64%-5.18%）, high and low P205 characteristics, aluminum saturation index （A/CNK） for 1.04-1.16. The enrichment of K, Th, U, Pb, Ti, Nb in different degrees of loss, P, Sr, Eu etc., belong to metaluminous to peraluminous highdifferentiation I type granite; analysis in combination with regional geological background, may indicate the formation of Sanxing mountain and Siberia plate and North China plate after docking extension.

关 键 词：三兴山 锆石U-PB年龄 高分异I型花岗岩 矿体成因 

分 类 号：P597.3[天文地球—地球化学]