论文部分内容阅读
从找矿勘查角度,对青海南部新发现的茶曲帕查Pb-Zn矿床的勘查历史和现状进行了介绍,并对下一步找矿方向提出了建议。该矿是2002年以来在1∶20万化探扫面及1∶5万水系沉积物化探发现异常后进一步通过1∶1万地质、化探、激电等综合调查及钻孔工程确定的矿床,目前控制(332+333+334)铅锌资源量99.6万吨。矿区填图表明,北部中新世五道梁组不整合于南部的二叠系九十道班灰岩之上,后者以北倾的逆冲断层和南部那益雄组碎屑岩接触,钻孔资料显示该断层可能为深部由南向北逆冲断层的反冲断层。矿体在孔莫隆矿段主要就位于灰岩内,在茶曲帕查矿段出现在那益雄组和五道梁组中,前者矿体发育好,后者矿化主要见于地表。矿区内圈出4条激电-化探异常,均呈东西向带状分布,分别出现在北部五道梁组、中部九十道班组灰岩、南部那益雄组和五道梁组中。音频大地电磁测深显示灰岩呈相对高阻,碎屑岩、灰岩破碎带、地表水、矿化呈相对低阻。综合分析表明,“三江”北段风火山-囊谦褶皱逆冲带内、与新生代盆地相伴的老于新生代的碳酸盐岩是该类矿床的主要赋矿部位,在矿区范围内,多才玛矿段激电-化探异常带内的灰岩中、地表见矿化、深部具音频大地电磁测深显示的高阻体中相对低阻部位是值得关注的勘查目标。
Based on prospecting exploration, the history and current status of the newly discovered Ququpaq Pb-Zn deposit in the southern part of Qinghai are introduced, and some suggestions for prospecting direction are put forward. The mine is a deposit of 1: 20000 geochemical, geochemical, and other comprehensive investigations and drilling confirmed after 1: 20000 geochemical exploration and 1: 50000 sediment geochemical exploration since 2002 , The current control (332 + 333 + 334) lead and zinc resources 996,000 tons. The mapping of the mines shows that the Wolongli Formation in the northern part of the basin is not integrated with the Jiuduanshi Class Permian limestone in the southern part of the basin. The latter is characterized by a northward thrust fault and contact with the Nei Yixiong clastic rocks The data show that the fault may be a deep thrust fault from south to north thrust fault. The ore body is mainly located in the limestone in the Kongmurong ore section, and is found in the Naxiupac and Wudaoliang sections of the tea. The former is characterized by well developed ore bodies and the latter is mainly found on the earth’s surface. There are 4 electroweak-geochemical anomalies within the mine area, showing an east-west zonal distribution. They occur in the Wudaoliang Formation in the north, the limestone in the Jiuban Class in the middle, the Nahaxiong Formation in the south, and the Wudaoliang Formation in the south. The results show that the limestone shows relatively high resistance, and the clastic rocks, limestone crushed zones, surface water and mineralization show relatively low resistance. Comprehensive analysis shows that the older Cenozoic carbonate rocks associated with the Cenozoic basins in the Fenghuoshan-Xuanqian fold-thrust belt in the northern part of the “Sanjiang” are the main ore-hosting parts of this type of deposit, In the limestone within the excavated anomaly-geochemical anomalous zone of the Tamaqan section, mineralization is seen at the surface and relatively low-resistivity sites in the high-resistivity body with an audiotellurism sound show in deep are the exploration targets of concern.