大别造山带超高压变质带中含金钛-铁氧化物  

THE GOLD-BEARING TI-FE OXIDES IN THE ULTRAHIGH PRESSURE METAMORPHOSED BELT OF THE DABIESHAN OROGEN

作　　者：杜建国[1,2] 孙先如[1] 胡礼军 

机构地区：[1]安徽地质调查院 [2]合肥工业大学资源与环境科学系,安徽合肥230009 [3]安徽省工业经济职工大学

出　　处：《安徽地质》1999年第4期280-283,共4页Geology of Anhui

基　　金：国土资源部"九五"重大基础项目!"9501102- 3 - 1"专题部分成果

摘　　要：大别造山带ＨＰ（高压）－ ＵＨＰ（ 超高压） 变质岩中的钛－ 铁氧化物系列矿物和其寄主岩石同是ＨＰ－ ＵＨＰ变质作用过程的重要地质记录，经研究发现这些钛－ 铁氧化物中金元素浓度较高。对榴辉岩相、角闪岩相变质岩中金红石、钛铁矿电子探针微区分析发现其含金值高达０－０１ ％ ～０－６１ ％ ；微区电子探针浓度扫描揭露金呈超微粒包体、弥散状态分布于金红石、钛铁矿中。钛－ 铁氧化物矿物中出现这种含金形式不仅是金在ＨＰ－ ＵＨＰ变质作用下具有亲铁性质的表现，也可能是金在地幔岩石中的主要赋存状态。The Ti-Fe oxides minerals in the high pressure(HP)-ultrahigh pressure(UHP) metamorphosed rocks along with the rocks themselves identically recorded the HP-UHP metamorphic process It has been shown by research that Au element concentrated considerably in the Ti-Fe oxides The microprobe analysis with concentration scanning indicates that gold scatters in the form of super-micro grain envelopes and in diffuse dispersion pattern with a content up to 0 01%-0 61%in rutile and ilmenite of eclogite and amphibolite facies metamorphosed rocks The way gold appears in Ti-Fe oxides minerals not only shows its siderophilicity under HP-UHP metamorphic condition,probably is also its major mantle rocks-hosted state

关 键 词：含金钛-铁氧化物 高压-超高压变质带 大别-苏鲁造山带 

分 类 号：P588.3[天文地球—岩石学]