本文選題：地球化學(xué) + 輝鉬礦Re-Os同位素測年�。� 參考：《礦床地質(zhì)》2017年04期

【摘要】：梨木嶺鉬礦床是近年來新發(fā)現(xiàn)的鉬礦,也是目前大別山構(gòu)造帶唯一具有工業(yè)意義的中型鉬礦床。通過輝鉬礦Re-Os同位素年代學(xué)測定,獲得梨木嶺鉬礦Ⅰ礦脈5件樣品輝鉬礦的Re-Os模式年齡為(115.3±1.4)Ma~(118.1±1.5)Ma,加權(quán)平均年齡為(116.8±1.3)Ma;等時線年齡為(119.9±6.2)Ma(MSWD=1.6)。Ⅱ礦脈2件輝鉬礦Re-Os模式年齡分別為(114.7±1.6)Ma和(117.0±1.4)Ma。兩條礦脈中輝鉬礦樣品的Re-Os模式年齡在誤差范圍內(nèi)一致,表明這兩條礦脈為早白堊世同期熱液產(chǎn)物。梨木嶺鉬礦床可能為與早白堊世中酸性巖漿活動有關(guān)的巖漿熱液型礦床。早白堊世大別山鉬成礦作用不僅僅局限在北大別的北淮陽構(gòu)造帶,在大別山南麓同樣存在該階段鉬成礦作用。
[Abstract]:The Limuling molybdenum deposit is a newly discovered molybdenum deposit in recent years, and it is also the only medium molybdenum deposit of industrial significance in the Dabie Mountain tectonic belt at present. Based on the Re-Os isotopic dating of molybdenum ore, the molybdenum model age of five molybdenum samples from Limueling molybdenum mine I is 115.3 鹵1.4)Ma~(118.1 鹵1.5MaA, the weighted average age is 116.8 鹵1.3MaA, and the isochron age is 119.9 鹵6.2MS-MSWD1.6.The 鈪，

本文編號：1895467