本文選題：夏日哈木　切入點：銅鎳礦　出處：《地質通報》2017年07期

【摘要】：通過對夏日哈木銅鎳礦成礦地質背景、礦床地質特征的研究,總結了夏日哈木銅鎳礦床成礦模式。認為夏日哈木巖體群處于昆中巖漿弧帶,晚志留世—早泥盆世處于陸-陸碰撞階段伸展環(huán)境,是夏日哈木超大型鎳-鈷硫化物礦形成的先決條件;幔源巖漿深部熔離和向上貫入是成礦關鍵,熔離成礦過程中地殼混染也是一個必須條件,后期構造控制了礦體的定位以及形態(tài)。該區(qū)成礦經(jīng)歷了橄欖石和斜方輝石成礦期、黃銅礦和鎳黃鐵礦成礦期和鎳華和孔雀石表生氧化期三期。據(jù)此提出下一步找礦方向,區(qū)域上昆中巖漿弧帶是主要的成礦區(qū)帶,礦區(qū)Ⅰ和Ⅲ號巖體中間是深部最有利的驗證位置,外圍拉寧灶火異常是驗證的重要靶區(qū)。
[Abstract]:Based on the study of the metallogenic geological background and geological characteristics of the summer Hamu copper-nickel deposit, the metallogenic model of the summer Hamu copper-nickel deposit is summarized. It is considered that the summer Hamu rock mass group is located in the central Kun magmatic arc zone. The late Silurian early Devonian extensional environment in the continental continent collision stage is a prerequisite for the formation of the ultralarge nickel-cobalt sulfide deposits in summer Hamu, and the deep melting and upward penetration of mantle magma are the key to the mineralization. Crustal mixing is also a necessary condition in the process of melting and separation mineralization. The late tectonics controlled the location and morphology of the orebody. The ore-forming period of olivine and clinopyroxene occurred in this area. The metallogenic stage of chalcopyrite and nickel pyrite and the three stages of supergenetic oxidation of nickel and malachite. Based on this, it is suggested that the magmatic arc zone is the main metallogenic zone in the middle of Shangkuncun region. The center of No. 1 and No.3 rock mass in the mining area is the most favorable verification position in depth, and the peripheral Lanning focal fire anomaly is an important target area for verification.
【作者單位】： 青海省地質礦產(chǎn)勘查開發(fā)局;青海省地質調查院;青海大學;
【基金】：國土資源部公益性行業(yè)科研專項《東昆侖地區(qū)多金屬成礦系列與找礦突破》(編號:201211037) 青海省科技廳項目《青海青藏高原北部地質過程與礦產(chǎn)資源重點實驗室》(編號:2014-Z-Y06)和《柴達木盆地南北緣成礦系統(tǒng)與勘查開發(fā)示范》(編號:2016-SF-A3)
【分類號】：P618.41

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本文編號：1674435