神农架式铁矿特征简介
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引用本文：.1984.A Brief Introduction Of The Characteristics Of The Shennongjia Type Iron Deposit[J].Mineral Deposits,3(2):94~98
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李石 湖北省地质实验室 
 
A Brief Introduction Of The Characteristics Of The Shennongjia Type Iron Deposit
Abstract:Located in Shennogjia mountainous area, western Hubei Province and formed in Proterozoic era, the ore deposit under investigation differs from Precambrian .metamorphic-sedimentary iron ore deposits in that it hasn-tundergone metamorphism. Occurring stratoid and lenticular forms, its ore bodies are confined to Kuaigshishan Formation of Shennorigjia Group. From bottom to top, the ore-bearing sequence changes lithologically in order of sandstone-silty pelite-iron ore beds-clay slate with the main ore beds lying where clastic rocks grade into clay slates. Iron ores consist mainly of hematite and Fe-rich chlorite associated with such accessory minerals as quartz and hydromica; they show predominantly clastic and oolitic textures and are characterized in chemical composition by SiO2 +Al2O3>MgO + CaO. An investigation into the ore-bearing sequence suggests evidently the formation of ore bodies in epicontinental environment; hematite, magnetite and Fe-rich chlorite are considered to be syngenetic minerals formed under favorable physico-chemical conditions.
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