华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地研究新进展和潜力预测

New Research Progress and Potential Prediction of Lijiawan-Gaodi-Daotuo Graben Located in Songtao Area,Wuling Manganese Ore Belt in Nanhua Period,South China

华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地控制形成了系列著名的大型-超大型锰矿床。本文依托2020—2021年实施的贵州松桃高地超大型锰矿床大精查(勘探)项目最新成果,运用锰矿气液喷溢沉积成矿理论与隐伏锰矿找矿预测技术体系,对该地堑中的含锰岩系、(富)锰矿体厚度、矿石品位等变化规律及气液喷溢矿石相特征进行综合研究,进一步确定该地堑中呈北东70°方向展布的气液喷溢沉积中心,由里往外依次形成中心相、过渡相、边缘相三个矿石相,富锰矿体均分布在中心相区。中心相面积达5.5 km^(2),说明锰矿大规模喷溢成矿作用强烈。预测该地堑矿权空白区资源量可能还有2亿吨,以致整个地堑盆地锰矿总资源量可达5亿吨,是一个隐伏的世界级巨型锰矿田。

A series of famous large to super large manganese deposits were formed in the Lijiawan-Gaodi-Daotuo Graben,Wuling Manganese Ore Belt,South China.This study is based on the latest research implemented in 2020-2021 about the meticulous investigation(exploration)of the Gaodi Super Large Manganese Deposit in Songtao area,Guizhou Province,using the gas-liquid effusion-sedimentary metallogenic theory of manganese deposits and prospecting prediction technology system of concealed manganese deposits,the variations of manganese layer,ore thickness and ore grade,ore facies characteristics of manganese deposits are analyzed,which prove that the gas-liquid effusion-sedimentary center which spread along 70°NE is divided into central facies,transitional facies and marginal facies,and manganese-rich ores are distributed in the center facies.The area of the central facies is 5.5 km^(2),and characterized by strong large-scale metallogenesis.It can be predicted that there are still 200 million tons left in the graben,and the total amount of manganese ores in the whole graben can reach 500 million tons,forming a world-class giant concealed manganese deposits.