湖南省临湘市虎形山地区铷锶同位素年代学研究
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摘要
文章通过研究虎形山地区稳定同位素,以及采用含矿石英Rb-Sr同位素测年方法,测得虎形山钨铍多金属矿、石滚岭铜多金属矿和张家冲铜多金属矿的成矿年龄分别为135±5Ma、144±5Ma、127±16Ma,而幕阜山岩体的年龄为147.9±5Ma,同属燕山晚期。笔者认为,虎形山地区矿床的形成与燕山晚期岩浆、构造活动有关,主要成矿物质来源于深部隐伏侵入的岩浆。
In the paper,by studying the stable isotopes in Huxingshan area and using the Rb-Sr isotopic dating methods,the mineralization ages of Huxingshan W-Be polymetallic deposit,Shigunling Cu polymetallic deposit and Zhangjiachong Cu polymetallic deposit are ascertained to be 135±5Ma,144±5Ma and 127±16Ma respectively,and the age of Mufushan rock mass is 147.9±5Ma which falls in late Yanshanian.The formation of Huxingshan deposit is related to magma and tectonic activity of late Yanshanian.The principal metallogenic materials originate from the deep-concealed-intrusive magma.
In the paper,by studying the stable isotopes in Huxingshan area and using the Rb-Sr isotopic dating methods,the mineralization ages of Huxingshan W-Be polymetallic deposit,Shigunling Cu polymetallic deposit and Zhangjiachong Cu polymetallic deposit are ascertained to be 135±5Ma,144±5Ma and 127±16Ma respectively,and the age of Mufushan rock mass is 147.9±5Ma which falls in late Yanshanian.The formation of Huxingshan deposit is related to magma and tectonic activity of late Yanshanian.The principal metallogenic materials originate from the deep-concealed-intrusive magma.
引文
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[5]刘耀荣,陈俊,等.2008.1:5万陆城、赵李桥、临湘、横溪幅区域地质调查报告[R].湖南省地质调查院,内部资料.
[6]黄恩宇,等.1976.1:20万蒲圻幅区域地质调查报告[R].湖北省地质局区域地质测量队,内部资料.
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[8]李建双,李细伢,等.1991.湖南省临湘县源潭镇虎形山铜多金属矿区普查地质报告[R].湖南有色地质勘局二三六队,内部资料.
[9]李华芹,陈富文,蔡红.新疆西准噶尔地区不同类型金矿床Rb—Sr同位素年代研究[J].地质学报,2000,74(2):181-192..
[2]胡芳芳,范宏瑞,杨进辉,等.胶东乳山含金石英脉型金矿的成矿年龄:热液锆石SHRIMP法U-Pb测定[J].科学通报,2004,49:1191-1198.
[3]Christensen J N,Halliday A N,Leigh K E,et al DirectDatingof Sulifides by Rb—Sr a Critical Test Using the Polaris Mississi-pi Valley-type Zn—Pb Deposit[J].Geochim et Cosmochim Ac-ta,1995,59:5191-5197.
[4]刘利生,唐朝永,张强录,等.2011.湖南省临湘市虎形山矿区钨矿普查报告[R].湖南省有色地勘局二四七队,内部资料.
[5]刘耀荣,陈俊,等.2008.1:5万陆城、赵李桥、临湘、横溪幅区域地质调查报告[R].湖南省地质调查院,内部资料.
[6]黄恩宇,等.1976.1:20万蒲圻幅区域地质调查报告[R].湖北省地质局区域地质测量队,内部资料.
[7]申恩荣,等.1964.湖南省临湘县虎形山钨铍矿床评价报告[R].湖南省冶金二三五勘探队,内部资料.
[8]李建双,李细伢,等.1991.湖南省临湘县源潭镇虎形山铜多金属矿区普查地质报告[R].湖南有色地质勘局二三六队,内部资料.
[9]李华芹,陈富文,蔡红.新疆西准噶尔地区不同类型金矿床Rb—Sr同位素年代研究[J].地质学报,2000,74(2):181-192..