滇东南上真武锰矿床地质特征及勘探远景

Geological Characteristics and Exploration Prospects of Shangzhenwu Manganese Deposit in Southeastern Yunnan

为推动滇东南找矿远景区取得锰矿找矿突破,收集云南上真武锰矿区域地质资料,开展野外地质调查、探槽和样品测试等工作,根据矿床地质特征研究,探讨找矿方向。结果表明:矿区含矿建造为泥盆系达莲塘组硅质岩—碎屑岩,锰矿体长约1000 m,宽约140~260 m。锰品位14.07%,以软锰矿为主。矿石为隐晶质、砂屑结构和粉土状构造。含锰矿层受地层控制,锰质经风化、搬运在海相环境中沉积,后期锰矿层抬升剥蚀,表生风化作用对矿体有明显改造和富集作用,为沉积改造成因。该区具良好的锰矿找矿潜力。

In order to promote a breakthrough in manganese ore prospecting in the prospecting scenic area in southeast Yunnan,we have collected regional geological data of Shangzhenwu manganese ore in Yunnan in field geological surveys.We have also made the exploration trenches and sample tests to carry out research on the geological characteristics of the deposit.It explores the prospecting direction.The results show that the ore-bearing formation in the mining area is the Devonian Daliantang Formation siliceous rock-clastic rock.The manganese ore body is about 1000 m long and 140~260 m wide.The manganese grade is 14.07%in pyrolusite.The ore is cryptocrystalline,sand-dust structure and silt-like structure.The manganese-bearing ore layer is controlled by the strata.The manganese is deposited in the marine environment through weathering and transportation.The manganese ore layer is uplifted and denuded in the later period.The superficial weathering has a significant transformation and enrichment effect on the ore body,which is the cause of sedimentary transformation.This area has good prospecting potential for manganese deposits.