铀矿地质
鈾礦地質
유광지질
URANIUM GEOLOGY
2014年
5期
257-262,282
,共7页
祁漫塔格中段%花岗岩%铀矿化特征%找矿前景
祁漫塔格中段%花崗巖%鈾礦化特徵%找礦前景
기만탑격중단%화강암%유광화특정%조광전경
middle of Qimantage%granite%uranium mineralization characteristics%exploration pros-pects
祁漫塔格中段目前已发现了黑山铀矿点和小狼牙山南、西大沟脑、西沟等4处铀矿化点,矿化赋存在海西印支期花岗岩与古元古界金水口群的接触带附近,受接触带附近的断裂构造控制明显,与赤铁矿化、硅化和绿泥石化蚀变关系密切。黑山铀矿点矿石的电子探针分析结果表明,矿石中含有沥青铀矿和硅钙铀矿、钒钙铀矿、硅钾铀矿等。区内经历了加里东、海西、印支和燕山期多次构造岩浆活动,断裂构造发育;金水口群变质岩和印支燕山期二长花岗岩铀含量可达(5~12)×10-6,是成矿良好的铀源条件。因此,笔者认为该区具有较好的找矿前景。
祁漫塔格中段目前已髮現瞭黑山鈾礦點和小狼牙山南、西大溝腦、西溝等4處鈾礦化點,礦化賦存在海西印支期花崗巖與古元古界金水口群的接觸帶附近,受接觸帶附近的斷裂構造控製明顯,與赤鐵礦化、硅化和綠泥石化蝕變關繫密切。黑山鈾礦點礦石的電子探針分析結果錶明,礦石中含有瀝青鈾礦和硅鈣鈾礦、釩鈣鈾礦、硅鉀鈾礦等。區內經歷瞭加裏東、海西、印支和燕山期多次構造巖漿活動,斷裂構造髮育;金水口群變質巖和印支燕山期二長花崗巖鈾含量可達(5~12)×10-6,是成礦良好的鈾源條件。因此,筆者認為該區具有較好的找礦前景。
기만탑격중단목전이발현료흑산유광점화소랑아산남、서대구뇌、서구등4처유광화점,광화부존재해서인지기화강암여고원고계금수구군적접촉대부근,수접촉대부근적단렬구조공제명현,여적철광화、규화화록니석화식변관계밀절。흑산유광점광석적전자탐침분석결과표명,광석중함유력청유광화규개유광、범개유광、규갑유광등。구내경력료가리동、해서、인지화연산기다차구조암장활동,단렬구조발육;금수구군변질암화인지연산기이장화강암유함량가체(5~12)×10-6,시성광량호적유원조건。인차,필자인위해구구유교호적조광전경。
In the middle of Qimantage mountain range,one uranium occurrence and four mineralization spots have been found,there are Heishan occurrence,Langyashan South,Xidagounao and Xigou spots. The mineralization is distributed near the contact zones between Variscan Indosinian granitoids and Pal-eoproterozoic Jinshuikou group,which are controlled evidently by the faults and often accompanied with hematitization,silicification and chloritization.Electron microprobe analysis showed that ore in Heishan occurrence contains native uranium mineral of pitchblende and secondary uranium mineral of uranophane, Tyuyamunite,boltwoodite.Because uranium content of Paleoproterozoic metamorphic Jinshuikou group and Indo Yanshanian adamellite content can reach (5~12)×10-6 which provide good uranium source;the region also experienced multi tectonic magmatic activity of Caledonian,Variscan,Indo China and Yanshan and faults are well developed.Therefore,the middle of Qimantage mountain range has good ex-ploration prospects.