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产于Rodinia超大陆裂解背景下、武陵次级裂谷盆地中的黔湘渝地区南华纪古天然气渗漏沉积型锰矿床已成为中国最重要的锰矿床类型。通过分析总结该类型矿床地质背景、南华纪早期构造古地理与矿床地质特征,基于古天然气渗漏沉积型锰矿床的成矿模式,总结建立了该类型锰矿床找矿模型:即以南华纪早期同沉积断层、Ⅳ级断陷盆地、两界河组及其中古天然气成因的白云岩透镜体存在与否、锰矿成矿地质体与大塘坡组厚度和裂谷盆地古天然气锰矿成矿系统中渗漏喷溢中心相、过渡相、边缘相等为主要地质标志建立地质找矿模型;以Ⅳ级、Ⅲ级断陷盆地中不同的Mn/Cr微量元素比值指标和δ~(34)S值在中心相、过渡相、边缘相判别指标建立地球化学找矿模型;以锰矿成矿地质体的低电阻率、高极化率与其上覆及下伏地层高电阻率、低极化率的物性差异特征,建立AMT地球物理间接找矿模型。项目团队运用建立的地质、地球化学和地球物理找矿模型,在黔东地区锰矿整装勘查实践检验中,已先后新发现了亚洲最大的松桃道坨和松桃普觉(西溪堡)两个隐伏超大型锰矿床,最近又新发现松桃桃子坪、高地两个超大型锰矿床,使黔东地区成为新的世界级锰矿资源富集区。古天然气渗漏沉积型锰矿床已成为继传统的海相沉积型、沉积变质型锰矿床之后,全球最重要的三大锰矿床类型之一。
Produced in the Rodinia supercontinent cracking background, Wuling secondary rift basin in the Qianghuu area Nanhua Jigu gas leakage deposit type manganese deposit has become China’s most important type of manganese deposits. Based on the analysis of the geological background of this type of deposit, the tectonic paleogeography of South China Precursor and the geological characteristics of the deposit, based on the metallogenic model of the paleo-natural gas leakage deposit type manganese deposit, the prospecting model of this type of manganese deposit is established. The synsedimentary fault, the Ⅳ fault basin, the two boundary rivers and the dolomite lens of the Middle Paleozoic gas, the thickness of manganese ore-forming geology body and the thickness of Datangpo Formation and the infiltration of paleo-gas manganese ore system in rift basins And the geologic prospecting model was established with the main geologic markers such as leaking spill center, transition facies and edge equal. Different ratios of Mn / Cr trace elements and δ ~ (34) S values in Grade IV and Grade III fault basins were measured in the center Facies, facies, facies, facies, facies, facies, facies, facies, facies, facies and facies. , Set up the AMT geophysical prospecting model. The project team used the established geological, geochemical and geophysical prospecting models. In the test of the manganese ore whole-body exploration in the eastern part of Guizhou Province, it has newly discovered Songdo Tao Tuo and Songtao Pujue (Xixi Fort), two of the largest in Asia A hidden ultra-large manganese deposits, recently found new peach peach pine, high ground two super-large manganese deposits, making the eastern part of Guizhou Province a new world-class manganese ore resource-rich area. The paleo-natural gas leakage sedimentary manganese deposit has become one of the three most important manganese deposit types in the world after the traditional marine sedimentary and sedimentary metamorphic manganese deposit.