西藏谢通门县雄村矿集区综合信息找矿模型及靶区预测

发布时间：2018-03-20 15:39

本文选题：找矿模型　切入点：找矿预测　出处：《地球学报》2017年05期 　论文类型：期刊论文

【摘要】：雄村铜金矿集区位于南拉萨地块南缘的冈底斯斑岩铜矿带,资源潜力大(仅查明的铜金属资源量超过250万吨、伴生金金属资源量超过250吨、伴生银金属资源量超过1 100吨)、成矿地质背景特殊。通过对雄村矿集区的勘查和研究成果的系统分析,本文从矿床地质特征、地球物理特征、地球化学特征、遥感特征等四个方面进行了详细的归纳总结,分析了各类成矿要素的特征及内在联系。以找矿勘查为宗旨,扩大资源量为目的,建立了综合信息找矿模型。找矿模型显示,早、中侏罗世含矿斑岩和雄村组凝灰岩是主要的赋矿岩石,钾硅酸盐化、钠化-钙化、黄铁绢英岩化、青磐岩化是主要蚀变类型,Cu-Au-Ag元素地球化学异常是重要的地球化学找矿标志,矿体产出受NW、EW向的断裂构造控制,地面磁测的高磁异常及低磁异常、遥感蚀变异常(钾硅酸盐化蚀变、绢云母化蚀变和地表铁染)及线-线和线-环交切结构是主要的地球物理和遥感找矿标志。利用构建的综合信息找矿模型,在雄村矿集区共圈定出了3个A类找矿靶区(A-1,A-2和A-3),4个B类找矿靶区(B-1,B-2,B-3和B-4)和2个C类找矿靶区(C-1和C-2),并对各找矿靶区进行了评价。
[Abstract]:The Xiongcun copper-gold concentration area is located in the Gangdis porphyry copper ore belt on the southern margin of the southern Lhasa massif, with great resource potential (only 2.5 million tons of copper and 250 tons of associated gold resources have been identified. The associated silver metal resource is over 1 100 tons, and the metallogenic geological background is special. Based on the systematic analysis of the exploration and research results in Xiongcun ore concentration area, the geological, geophysical and geochemical characteristics of the deposit are analyzed in this paper. Four aspects such as remote sensing characteristics are summarized in detail, and the characteristics and internal relations of various ore-forming elements are analyzed. A comprehensive information prospecting model is established for the purpose of prospecting and exploration and expanding the amount of resources. The ore-prospecting model shows that it is early. The ore-bearing porphyry and tuff of Xiongcun formation are the main ore-bearing rocks in the Middle Jurassic, and potassium silicate, sodium calcification, yellowtierite and Qingiranlitization are the main geochemical anomalies of Cu-Au-Ag elements in the major alteration types, which are the important geochemical prospecting indicators. The orebody is controlled by the fault structure in the NWW EW direction, the high magnetic anomaly and the low magnetic anomaly, the remote sensing alteration anomaly (potassium silicate alteration), the high magnetic anomaly and the low magnetic anomaly measured by the surface magnetic field. Sericite alteration and surface iron staining) and line-line and line-loop intersecting structures are the main geophysical and remote sensing prospecting markers. In Xiongcun ore accumulation area, three A-1A-2 and A-3B prospecting target areas and four B type prospecting target areas (B-1, B-2, B-3 and B-4) and two C-type prospecting target areas (C-1 and C-2) have been delineated, and each prospecting target area has been evaluated.
【作者单位】：成都理工大学地球科学学院国土资源部构造成矿成藏重点实验室;中国地质科学院矿产资源研究所;西藏天圆矿业资源开发有限公司;中国地质调查局成都地质调查中心;西藏大学工学院;
【基金】：国家自然科学基金项目(编号:41502079) 四川省青年基金项目(编号:2014JQ0047) 大陆构造与动力学国家重点实验室开放基金项目(编号:K201401) 四川省教育厅自然科学重点项目(编号:15ZA0073) 中国地质调查局地调项目(编号:[资]03-002-0557;资[2014]01-028-042) 四川省矿产资源研究中心项目(编号:SCKCZY2014-YB04)联合资助~~
【分类号】：P612

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