| Geochemical Behavior of Manganese in Weathering Environments and Its Significance in Exploration |
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| 作者姓名： | 朱兆奇 |
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| 作者单位： | TeamNo.601ofSouthwestMetallurgico－GeologicalExplorationCompany |
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| 摘 要： | Under and climate conditions the chemical weathering of manganese ores is govermed by the fugacities of O2,CO2 and S2 in the atmosphere and soils.Manganese minerals exhibit solid phase transformations without migration of Fe and Mn.Under tropical and subtropical humid climate condi-tions low-valent Mn is instable and apt to be oxidized into high valency state.High-valent Mn miner-als are stable and easy to form secondary high-grade Mn ores.Secondary concentration is possible for Mn ores in carbonate formations,while those in clastic rocks tend to migrate and may be washed away.Such differences are the main obstacles in prospecting Mn ore deposits.
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| 关 键 词： | 地球化学特征 锰矿床 气候环境 找矿标志 碳酸盐 |
Geochemical behavior of manganese in weathering environments and its significance in exploration |
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| Zhu Zhaoqi.Geochemical Behavior of Manganese in Weathering Environments and Its Significance in Exploration[J].Chinese Journal of Geochemistry,1989,8(1):54-64. |
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| Authors: | Zhu Zhaoqi |
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| Institution: | (1) Team No. 601 of Southwest Metallurgico Geological Exploration Company, China |
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| Abstract: | Under and climate conditions the chemical weathering of manganese ores is governed by the fugacities of O2, CO2 and S2 in the atmosphere and soils. Manganese minerals exhibit solid phase transformations without migration of Fe and Mn. Under
tropical and subtropical humid climate conditions low-valent Mn is instable and apt to be oxidized into high valency state.High-valent
Mn minerals are stable and easy to form secondary high-grade Mn ores.Secondary concentration is possible for Mn ores in carbonate
formations, while those in clastic rocks tend to migrate and may be washed away.Such differences are the main obstacles in
prospecting Mn ore deposits. |
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