骑田岭岩体成岩与成矿关系研究  

Study on the Relationship between the Rock-Forming and Ore-Forming of Qitianling Pluton

作　　者：丁正兴[1] 柏道远[1] 马铁球[1] 王先辉[1] 

机构地区：[1]湖南地质调查研究院,湖南湘潭411100

出　　处：《华南地质与矿产》2007年第3期1-5,共5页Geology and Mineral Resources of South China

基　　金：国土资源部地质大调查项目(200213000035)资助

摘　　要：湘南骑田岭岩体主要由两阶段侵位所形成，早阶段侵位花岗岩组成骑田岭岩体的主体。年代学资料表明：骑田岭岩体早阶段花岗岩时代为155～160Ma，晚阶段花岗岩时代145Ma±，云英岩型锡矿床及新田岭钨矿的矿化时代为156～160Ma，破碎带矽卡岩型和破碎带蚀变花岗岩型锡矿床的矿化时代为137±5Ma、133±15Ma。地质特征表明新田岭钨矿和云英岩型锡矿与早阶段主体花岗岩侵位密切相关，而破碎带矽卡岩型和破碎带蚀变花岗岩型锡矿床尽管产于主体花岗岩中，但锡矿化作用却为晚阶段花岗岩浆侵位时的气水热液沿断裂破碎带蚀变所形成。据上述，骑田岭岩体早阶段主体花岗岩侵位时形成了云英岩型锡矿床和矽卡岩型钨矿床，而晚阶段花岗岩侵位时形成了破碎带矽卡岩型和破碎带蚀变花岗岩型锡矿床。Qitianling pluton was formed by two phases of emplacement, and is mainly composed of early stage granite. Chronological data shows the age of 155 - 160Ma of the early granite of Qitianling pluton, about 145Ma of the late granite, 156 - 160Ma of the greisen type Sn - deposit and the Xintianling scheelite, and the age of 137±5Ma or 133 ± 15Ma of the rupture skarn type Sn - deposit and the rupture alteration granite type Sn -deposit. Geological characteristics indicate that the Xintianling scheelite and the greisen type Sn - deposit were related with early granite, and the rupture skarn type Sn - deposit and the rupture alteration granite type Sn - deposit in early major granite were formed by the alteration of the hydrothermal solutions in rupture zone. All above show that the greisen type Sn - deposit and the skarn scheelite were formed when early major granite emplaced, and the rupture skarn type Sn - deposit and the rupture alteration granite type Sn - deposit were formed when late granite emplaced.

关 键 词：成岩 成矿 骑田岭岩体 湘东南 

分 类 号：P588.12[天文地球—岩石学]