本文選題：輝鉬礦 + Re-Os同位素年齡　； 參考：《地質通報》2016年04期

【摘要】：采用輝鉬礦Re-Os同位素定年,獲得的內蒙古阿巴嘎旗比魯甘干鉬礦的輝鉬礦Re-Os同位素模式年齡變化范圍為236.9±3.7~238.7±2.4Ma,年齡加權平均值為237.9±1.7Ma,表明該礦床形成時代應為印支期。輝鉬礦的Re含量平均值為74.065×10~(-6),表明其主要為幔殼混合來源特征。該礦床位于賀根山斷裂帶以南的興蒙造山系索倫山-霍林郭勒弧盆系內,為斑巖型鉬礦床。鉬礦體主要賦存在黑云母花崗斑巖和角巖內,受內外接觸帶控制。接觸帶控礦容礦斷裂主要有北西向、北東向及近東西向,其內多充填有石英脈。細脈狀、網脈狀石英脈越發(fā)育,鉬礦化越強。區(qū)域研究表明,印支期是興蒙造山帶及其鄰區(qū)鉬(鎢)成礦的重要成礦期之一,但在本區(qū)尚屬首次發(fā)現(xiàn),為開展索倫山-霍林郭勒成礦帶區(qū)域成礦規(guī)律研究提供了重要參考。
[Abstract]:According to Re-Os isotopic dating of molybdenum ore, the age range of molybdenum Re-Os isotopic model is 236.9 鹵3.7 鹵238.7 鹵2.4 Ma. and the weighted average age is 237.9 鹵1.7 Ma. it shows that the age of formation of the deposit is the Indosinian epoch. The average re content of molybdenum is 74.065 脳 10 ~ (-6), which indicates that the molybdenum is mainly derived from mixed mantle crust. The deposit is a porphyry type molybdenum deposit located in the Soolenshan-Huolingol arc basin of the Xingmeng orogenic system south of the Hegenshan fault zone. Molybdenum ore bodies mainly occur in biotite granitic porphyry and hornstone and are controlled by internal and external contact zone. The ore-bearing faults in the contact zone are mainly NW, NE and EW, and most of them are filled with quartz veins. The more veined and reticulated quartz veins develop, the stronger molybdenum mineralization occurs. Regional studies show that the Indosinian epoch is one of the important metallogenic periods for molybdenum (tungsten) mineralization in the Xingmeng orogenic belt and its adjacent areas, but it is the first time to find it in this area, which provides an important reference for the study of the regional metallogenic regularity of the Solenshan-Hollinggoole metallogenic belt.
【作者單位】： 中國地質調查局天津地質調查中心;中國地質科學院國家地質實驗測試中心;內蒙古自治區(qū)地質調查院;中國地質科學院研究生部;
【基金】：中國地質調查局項目(編號:1212010561510,1212010811061,1212011120330,12120114001201,1212010781028,1212011085488,121201006000150015) 國土資源公益性行業(yè)科研專項(編號:200811010) 國家國際科技合作項目(編號:2012DFB20220)
【分類號】：P618.65;P597.3

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