| 滇东南含锰建造沉积相及聚锰条件分析 |
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| 关键词:manganiferous formation Middle Triassic Latin period sedimentary facies manganese accumulation conditions southeastern Yunnan |
| 基金项目:“全国矿产资源潜力评价——云南省锰矿潜力评价”项目(编号:1212011121022) |
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| An Analysis of Sedimentary Facies of Manganiferous Formation and Manganese Accumulation Conditions in Southeastern Yunnan |
| On the basis of an integrated analysis of the research achievements for regional geology and manganese deposits in southeastern Yunnan and in the light of the sedimentary facies study of manganiferous formation in Middle Triassic Latin period, the authors divided the manganese deposits in Falang Formation of southeastern Yunnan into two types, i.e., the Dounan type manganese deposits in detrital rock formation and the Baixian type manganese deposits in carbonate rock formation. Starting with the analysis of the sedimentary framework of typical manganese deposits, the authors studied the lithofacies and paleogrography of typical manganese deposits of Middle Triassic Latin period. The Dounan manganese deposit was formed in littoral-neritic detrital rock formation facies area of backreef lagoon, platform carbonate formation facies area and slope detrital rock formation facies area, with the last facies area containing lots of gravity flow sediments of heterochthonous accumulation. The Baixian manganese deposit was formed in the lagoon facies-tidal flat facies where confined platform water body was relatively stagnant. Under the conditions of different sedimentary frameworks, physical-chemical conditions of sea water, hydrodynamic environments, biological actions and contemporaneous faulting constituted important factors responsible for manganese accumulation. |
| LI Zhi-qun,LIANG Qiu-yuan,LIU Wen-jia,CHEN Ming-wei,ZOU Yun-da,ZHENG Rong-hua,GUO Xin.2013.An Analysis of Sedimentary Facies of Manganiferous Formation and Manganese Accumulation Conditions in Southeastern Yunnan[J].Acta Geoscientica Sinica,34(s1):17-24. |
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