發(fā)布時間：2018-08-29 18:43

【摘要】：東昆侖夏日哈木銅鎳礦床以賦存110萬噸Ni金屬成為全球鎳床近二十年來最重要的發(fā)現(xiàn)之一,也是僅次于金川巖漿銅鎳礦床的中國第二大銅鎳礦床。礦區(qū)發(fā)育5個鎂鐵-超鎂鐵質(zhì)巖體,目前僅Ⅰ號鎂鐵-超鎂鐵巖體內(nèi)發(fā)現(xiàn)了具有經(jīng)濟價值的超大礦體,110萬噸Ni金屬均賦存Ⅰ號巖體內(nèi);其他4個巖體中僅Ⅱ號巖體發(fā)現(xiàn)了礦化,是多種構(gòu)造體制疊加巖漿活動的結(jié)果。調(diào)查發(fā)現(xiàn)Ⅱ號巖體的主要巖性是輝長巖,LA ICP-MS鋯石U-Pb測試獲得Ⅱ號巖體輝長巖的成巖年齡為385.2 Ma,比Ⅰ號巖體成巖成礦時代稍年輕,屬于早泥盆世巖漿活動的產(chǎn)物。巖漿銅鎳礦體多賦存于輝石巖與橄欖巖中,輝長巖內(nèi)一般無經(jīng)濟價值的礦體存在。在夏日哈木礦區(qū),輝長巖基本是含礦輝石巖及橄欖巖的圍巖,輝長巖中所見的銅鎳礦化也是后期巖漿活動貫入的表現(xiàn)。結(jié)合區(qū)域年代學綜合分析認為,夏日哈木超大型巖漿銅鎳硫化物礦床的形成,是早泥盆世早期巖漿活動于柴達木盆地邊緣東昆侖造山帶夏日哈木地區(qū)具體的成礦表現(xiàn)。目前所發(fā)現(xiàn)的Ⅱ號巖體以輝長巖為主,不具備成鎳礦良好條件,較難發(fā)現(xiàn)有經(jīng)濟價值的銅鎳礦體。
[Abstract]:The summer Hamu copper-nickel deposit in East Kunlun has become one of the most important discoveries of the nickel deposit in the world in the past two decades with the presence of 1.1 million tons of Ni metals. It is also the second largest copper and nickel deposit in China after the Jinchuan magmatic copper-nickel deposit. There are 5 magnesia-ultramafic rock bodies developed in the mining area. At present, only the super-large orebodies with economic value have been found in the No. 1 magnesia-ultramafic rock body, and 1.1 million tons of Ni metals are all located in the No. 1 rock body, while only the 鈪，

本文編號：2212074