重庆市秀山县老田庄锰矿地质特征及矿床成因分析

The Analysis of Geological Characteristics and the Genesis of the Deposit for Laotian Village Manganese Ores in Xiushan County Chongqing City

南华系下统大塘坡组第一段为本区的含锰岩系,其厚度及岩性组合与锰矿有着直接的关系。本区锰矿属沉积菱锰矿矿床类型,具有多层含矿性。古地理、古构造对锰矿沉积的控制作用,在还原环境的条件下,沉积了一套以含炭质水云母页岩为主的黑色含锰岩系地层,锰矿即产于含锰岩系地层之底部。

The first section of Datangpo formation under Nanhua system is rock series with manganese, whose thickness and lithology combination have a direct relationship with manganese ore. This area belongs to the type of sedimentary manganese rhodochrosite deposit with muhilayer ore. The palaeogeography paleostructure have controlling effects on manganese ore deposition. In orignal environment, deposition of a carbonaceous mica shale rock strata with black manganese was formed and manganese ore is produced at the bottom of the rock strata.