内蒙古化德县三胜钨钼矿床辉钼矿Re-Os同位素年龄及其地质意义
Re-Os isotopic dating of molybdenites from the Sansheng W-Mo deposit in Huade County, Inner Mongolia, and its geological significance
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摘要: 内蒙古化德县三胜钨钼矿床位于华北陆块北缘,为岩浆期后中高温热液型矿床。采用辉钼矿Re-Os同位素分析获得辉钼矿的模式年龄加权平均值为138±1Ma,等时线年龄为138.6±1.4Ma,推测三胜钨钼矿床的形成时代为燕山晚期,这与区域上华北陆块北缘主要金属矿床的形成年龄吻合。辉钼矿的Re含量平均值为0.5548×10-6,表明其主要为地壳来源特征。成矿发生在陆内构造环境,为燕山期大规模构造-岩浆作用的产物。Abstract: Located in Huade Country of Inner Mongolia on the northern margin of North China Block, the Sansheng W-Mo depos-it is a postmagmatic mesothermal deposit. Molybdenite Re-Os isotope analysis of the deposit was conducted in this paper, which yielded the weighted average value of the molybdenite model age of 138±1Ma and isochron age of 138.6±1.4Ma. In consideration of the age data, the authors hold that the Sansheng W-Mo ore deposit was formed in late Yanshanian period, consistent with the age data of the formation of main ore deposits in this region. Rhenium content in molybdenite is 0.5548×10-6, indicating the crustal ori-gin. The ore-forming event resulted from large-scale Yanshanian tectonic and igneous activities and took place in an intracontinental tectonic environment.
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Key words:
- molybdenite /
- Re-Os isotope age /
- Sansheng W-Mo deposit
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[1] 潘桂堂, 肖庆辉, 陆松年, 等.中国大地构造单元划分[J]. 中国地质, 2009, 36(1):1-28.
[2] 李俊建, 韩九曦, 唐文龙, 等.蒙古地质矿产概况[M]. 天津:天津科学技术出版社, 2013:1-273.
[3] 徐志刚, 陈毓川, 王登红, 等. 中国成矿区带划分方案[M]. 北京:地质出版社, 2008:1-11.
[4] 李俊建, 张峰, 任军平, 等. 中蒙边界地区构造单元划分[J]. 地质通报, 2015, 34(4):636-662.
[5] 周勇, 李俊建, 宋雪龙, 等. 内蒙古三胜村钨钼矿地质特征[J]. 矿床地质, 2012, 31(增刊):411-412.
[6] Lambert D D, Forster J G, Frick L R, et al. Re-Os isotopic system-atics of the Vaisey's Bay Ni-Cu-Co magmatic ore system, Labra-dor, Canada[J].Lithos, 1999, 47(1/2):69-88.
[7] Du A D, Wu S Q, Sun D Z, et al. Preparation and Certification of Re-Os Dating Reference Materials:Molybdenite HLP and JDC[J]. Geostandard and Geoanalytical Research, 2004, 28(1):41-52.
[8] 杜安道, 赵敦敏, 王淑贤, 等. Carius管溶样和负离子热表面电离质谱准确测定辉钼矿铼-锇同位素地质年龄[J]. 岩矿测试, 2001, 20(4):247-252.
[9] 杜安道, 屈文俊, 王登红, 等. 辉钼矿亚晶粒范围内Re和187Os的失耦现象[J]. 矿床地质, 2007, 26(5):572-580.
[10] 屈文俊, 杜安道. 高温密闭溶样电感耦合等离子体质谱准确测定辉钼矿铼-锇地质年龄[J]. 岩矿测试, 2003, 22(4):254-262.
[11] 李靖辉. 河南嵩县大石门沟钼矿床辉钼矿Re-Os同位素年龄及地质意义[J]. 中国地质, 2014, 41(4):1364-1374.
[12] 毛景文, 华仁民, 李晓波. 浅议大规模成矿作用与大型矿集区[J]. 矿床地质, 1999, 18(4):291-299.
[13] 蔡明海, 张志刚, 屈文俊, 等. 内蒙古乌拉特后旗查干花钼矿床地质特征及Re-Os测年[J]. 地球学报,2010, 32(1):64-68.
[14] 段焕春, 秦正永, 林晓辉, 等. 河北丰宁县大草坪钼矿区岩体锆石U-Pb年龄研究[J]. 矿床地质, 2007, 26(6):634-642.
[15] 张彤, 陈志勇, 许立权, 等. 内蒙古卓资县大苏计钼矿辉钼矿铼锇同位素定年及其地质意义[J]. 岩矿测试, 2009, 28(3):279-282.
[16] 聂凤军, 张万益, 杜安道, 等. 内蒙古小东沟斑岩型钼矿床辉钼矿铼-锇同位素年龄及地质意义[J]. 地质学报, 2007, 7:898-905.
[17] 覃锋, 刘建明, 曾庆栋, 等. 内蒙古小东沟斑岩型钼矿床的成矿时代及成矿物质来源[J]. 现代地质, 2008, 22(2):173-180.
[18] 张作伦, 曾庆栋, 屈文俊, 等. 内蒙碾子沟钼矿床辉钼矿Re-Os同位素年龄及其地质意义[J]. 岩石学报, 2009, 1:212-218.
[19] 李香资, 班宜红, 权知心, 等. 内蒙古兴和县曹四夭钼矿床地球化学特征及成矿模型探讨[J]. 地质调查与研究, 2012, 35(1):39-46.
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