摘要
次玛班硕地区处于冈底斯斑岩铜成矿带中段以西,北东距朱诺大型斑岩铜矿约10 km,西南距罗布真铅锌多金属矿约6 km。经综合对比分析,作者初步认为次玛班硕地区具备斑岩铜矿成矿的优越地质条件,具有寻找斑岩型铜矿的潜力。铜成矿有利条件为近EW向断裂构造,斑状二长花岗岩体及与其套合好、强度大、浓集分带明显的地球化学异常,地表的次生铜矿化、原生硫化矿及热液蚀变矿物。结合典型斑岩型铜成矿特征和成矿规律,现提出次玛班硕重要找矿方向:(1)中新世具埃达克岩化学性质的斑岩体是重要的成矿地质体及成矿的必备条件;(2)NW向和NE向的断裂构造是重要的成矿构造结构面、控矿因素;(3)岩体中裂隙发育地段、强烈的钾化—硅化及绢英岩化、碳酸盐化等蚀变及已发现的两个次生矿化脉地段是重要的找矿部位;(4)面积性的火烧皮与其吻合的一、二、三级羟基异常区段;(5)元素地球化学组合三级浓集分带异常区和高值区,以上各地段和特征区应引起足够的重视,具有很大的成矿潜力和找矿前景。因此本研究对该区域勘查找矿工作具有重要的指导意义。
Cimabanshuo area lie in west of Gangdese porphyry copper metallogenic belt in the middle, with the northeast about 10 km away from the Zhunuo large porphyry copper mine,and southwest from the Luobuzhen lead and zinc polymetallic mine about 6 km. Through comprehensive comparision and analysis, the author preliminarily thinks that Cimabanshuo areas possess superior of the porphyry copper metallogenic geological conditions,and to find the potential of porphyry copper deposits. The copper mineralization favorable conditions is the nearly EW fracture structure, porphyritic monzonitic granite rock mass and its set of good, the intensity is big, obvious geochemical anomaly concentration zoning, the surface of the secondary copper mineralization, primary sulfide ore and hydrothermal alteration minerals. We combined with typical porphyry copper mineralization characteristics and metallogenic regularities,and put forward the important prospecting direction：（1）Miocene ＂adakite＂ chemical properties of porphyry body is an important metallogenic geological body and prerequisite;（2）NE and NW trend fracture structure is an important metallogenic tectonic structure planes and ore-controlling factors;（3）porphyry body fracture location, and strong potassium, silicification, sericite-quartz, carbonatization alteration, and being found two secondary mineralized vein, is an important prospecting area;（4） area of ＂Huoshaopi＂ and anastomosis of one, two, tertiary hydroxyl abnormal section;（5） element geochemicalcomposite triple concentration zoning of anomaly area and high value, above all location and characteristics area are aughted to cause enough attention,with a great deal of ore-forming potential and prospecting prospect. so this research have important guiding sig nificances on the regional exploration prospecting work.
出处
《甘肃地质》
2017年第4期28-36,共9页
Gansu Geology
基金
中国地质调查局发展研究中心整装勘查区找矿预测与技术应用示范项目西藏昂仁-谢通门朱诺铜矿整装勘查区矿产调查与找矿预测(项目编号:121201004000150017-95)资助
关键词
西藏
朱诺铜矿
次玛班硕
有利条件分析
Tibet
Zhunuo copper deposit
Cimabanshuo
favorable condition
