本文選題：矽卡巖型　切入點：Ⅰ型　出處：《地質(zhì)通報》2017年07期

【摘要】：它溫查漢西鐵多金屬礦床是東昆侖祁漫塔格成礦帶新發(fā)現(xiàn)的又一典型矽卡巖型礦床。利用LA-ICP-MS鋯石U-Pb定年方法,獲得礦區(qū)主要成礦巖體花崗閃長斑巖的成巖年齡為236.0±2.3Ma,該結(jié)果與前人利用~(40)Ar-~(39)Ar法獲得的矽卡巖型磁鐵礦礦石中白云母229.9±3.5Ma的等時線年齡一致�；◢忛W長斑巖為過鋁質(zhì)高鉀鈣堿性系列,成因類型屬于Ⅰ型;微量元素配分型式表現(xiàn)為輕稀土元素和高場強元素富集、重稀土元素和大離子親石元素虧損、中等負Eu異常的特征。花崗閃長斑巖形成于晚古生代—早中生代構(gòu)造-巖漿旋回的碰撞-后碰撞階段,與區(qū)域上大規(guī)模的幔源巖漿底侵及其與殼源巖漿的混合作用有關(guān)。
[Abstract]:It is another typical skarn type deposit newly discovered in the Qimantage metallogenic belt of East Kunlun. The LA-ICP-MS zircon U-Pb dating method is used. The diagenetic age of granodiorite porphyry is 236.0 鹵2.3 Ma. the result is in agreement with the isochron age of Muscovite 229.9 鹵3.5Ma in skarn magnetite ores obtained by our predecessors by using the method of 40 ~ (40) Ar-Li ~ (39) A _ r. The granodiorite porphyry belongs to the peraluminous high-potassium calc-alkaline series. The genetic type belongs to type 鈪，

本文編號：1673532