| 吕代和,袁良军,赵爽.贵州省松桃县大塘坡锰矿床野外考察指南[J].贵州地质,2024,(4):463-473 |
| 贵州省松桃县大塘坡锰矿床野外考察指南 |
| Field Investigation Guide of the Datangpo Manganese Deposit of Songtao County, Guizhou Province |
| 投稿时间：2024-10-08 |
| DOI： |
| 中文关键词: 锰矿床 喷溢沉积构造 贵州松桃 大塘坡 考察指南 |
| 英文关键词:Manganese deposit Eruption-sedimentary structures Songtao,Guizhou Datangpo Field guide |
| 基金项目:贵州省重大科技成果转化项目《矿产资源数字化勘查开发技术推广》(黔科合成果〔2022〕重点003)、贵州省找矿突破战略行动重大协同创新项目(黔科合战略找矿〔2022〕ZD003)、中央引导地方科技发展资金项目(黔科中引地〔2021〕4027)和贵州省地矿局科技创新人才团队培育计划项目(黔地矿科合〔2023〕TD001)资助 |
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| 中文摘要: |
| 贵州省松桃县大塘坡是著名的中国“大塘坡式”锰矿发现地，矿区露头良好。通过长期研究表明，“大塘坡式”锰矿，即是一种全新的锰矿床类型——喷溢沉积型锰矿床。南华裂谷中的武陵次级裂谷与铜仁古裂谷联合控制了锰矿大规模喷溢沉积成矿作用和黔东世界级锰资源富集区形成。菱锰矿体赋存在Ⅳ级地堑中心大塘坡组第一段(俗称“含锰岩系”)底部。在大塘坡锰矿区，大量分布有与锰矿流体喷溢成矿有关的地质现象，是开展喷溢沉积型锰矿床找矿科研工作的一个十分难得的天然实验室。矿区锰矿成矿期构造呈近东西向展布，与近南北向展布的后生构造，在空间上构成了“双层立交桥式”构造展布特征。在剖面上，锰矿床自下而上出现基于底辟-喷溢构造系统的积木式矿石相分带。在平面上，则出现由里向外形成反映含锰气液喷溢沉积的中心相(富锰带)、过渡相(中锰带)、边缘相(贫锰带)同心椭圆状矿石相平面分带等特征。开展大塘坡锰矿床的野外考察，可为在其他地区开展类似成因的锰矿床找矿科研提供借鉴和参考。 |
| 英文摘要: |
| The Datangpo manganese(Mn) district in Songtao county, Guizhou province, is characterized by well-preserved outcrops and is recognized as the discovery site of the Nanhua “Datangpo-type” Mn deposit. Extensive research indicates that this deposit represents a new type—an eruption sedimentary Mn deposit. The large-scale mineralization and formation of this world-class Mn-enrichment area in eastern Guizhou were primarily controlled by the Wuling sub-rift and Tongren ancient rift, both components of the Nanhua Rift system. The rhodochrosite ore bodies are predominantly hosted at the bottom of the first member of the Datangpo Formation, commonly referred to as the “Mn-bearing rock series,” within the central zone of the level-Ⅳ graben. Numerous geological features associated with Mn-bearing fluid eruption and mineralization render this district a natural laboratory for studying this deposit type. The primary ore-controlling structures, trending roughly east-west, intersect with later, NS trending post-mineralization structures, resulting in a unique “double-decker bridge” structural configuration. In the profile, the Mn deposit displays a block-like zonation from bottom to top based on a diapir-eruption structural system. On the plane, concentric elliptical ore features are evident, reflecting the progression from a central phase (Mn-rich belt) to transitional phase (Middle Mn belt) and marginal phase (Mn-poor belt), indicative of Mn-bearing fluid eruption sedimentation. Field investigations at the Datangpo manganese deposit offer valuable insights into the exploration and study of similar genesis manganese deposits elsewhere. |
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