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澜沧大黑山勘查区位于著名的澜沧老厂银铅锌多金属矿床南东方向约10 km。最近在大黑山勘查区内实施地质填图时发现若干条铅锌银多金属矿(化)体,并在这些矿(化)体的两侧发现与澜沧老厂银铅锌多金属矿床重要找矿标志铁锰碳酸盐化带相似的富锰蚀变带,该蚀变带主要由脉状富锰蚀变岩和围岩组成。岩石学观察显示富锰蚀变岩脉主要为由软锰矿、硬锰矿、方铅矿、方解石等组成,电子探针分析显示富锰蚀变岩脉局部铅含量高达39.53%,等离子体质谱分析显示锰单矿物中Pb含量达11.9%,Zn含量达4.36%,Ag含量达到551g/t。综合研究发现大黑山勘查区与老厂银铅锌多金属矿床在矿化元素组合、围岩蚀变类型、控矿构造条件、含矿层位等多方面具有相似性,而富锰蚀变带的发现,有望促进大黑山勘查区银铅锌多金属找矿勘查取得重大突破。
Lancang Daheishan prospecting area is located about 10 km to the south of the famous Lancang Old Factory Ag-Pb-Zn polymetallic deposit. Recently, a number of Pb-Zn-Ag polymetallic ore bodies were found during the geological mapping in the Daheiyama prospecting area and were found to be important to the Lanchang Laozhang Ag-Pb-Zn polymetallic deposit on both sides of these ore bodies Prospecting of iron-manganese carbonates with similar manganese-rich alteration zone, the alteration zone is mainly composed of vein-like manganese-rich altered rocks and wall rocks. Petrological observations show that the Mn-rich altered dikes are mainly composed of pyrolusite, plutonium, galena and calcite. Electron probe analysis shows that the Pb content in the Mn-rich altered dikes reaches 39.53%, and the plasma mass spectrometry analysis The content of Pb in manganese single mineral is 11.9%, the content of Zn is 4.36% and the content of Ag is 551g / t. The comprehensive study shows that the Daheishan exploration area and the Laodong silver-lead-zinc polymetallic deposit are similar in mineralization elemental composition, wall rock alteration types, ore-controlling structure conditions and ore-bearing beds, and the rich Mn-bearing alteration zones It is found that it is expected to promote a major breakthrough in the exploration of silver, lead, zinc and polymetallic deposits in the exploration area of Greater Montenegro.