| 黔西南普安铅锌矿区盆地尺度构造 |
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| 引用本文： | 周亮,胡煜昭,谭笑林,李丕优,程涌.黔西南普安铅锌矿区盆地尺度构造[J].地球科学,2022,47(1):368-386. |
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| 作者姓名： | 周亮 胡煜昭 谭笑林 李丕优 程涌 |
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| 作者单位： | 1.昆明理工大学国土资源工程学院, 云南昆明 650093 |
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| 基金项目： | 国家自然科学基金项目(No.41672073)。 |
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| 摘 要： | 贵州省普安铅锌矿区位于华南褶皱带西北缘的黔西南坳陷,矿体主要赋存在石炭系的白云质灰岩和白云岩中,构造控矿特征显著.NW-SE走向的二维地震剖面横穿了铅锌矿区,清晰地揭示了矿区的地层和NE向构造格架.从浅层的泥盆系至深层的新元古界,共标定了3个反射层和3个反射单元,据两个重要角度不整合面,矿区呈现为双层基底、单层盖层的"...
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| 关 键 词： | 地震剖面 构造控矿模型 盆地格架 黔西南 构造地质学 |
| 收稿时间： | 2020-12-19 |
Basin-Scale Structure of Pu'an Pb-Zn Deposit Area,Southwest Guizhou,China |
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| Zhou Liang,Hu Yuzhao,Tan Xiaolin,Li Piyou,Cheng Yong.Basin-Scale Structure of Pu'an Pb-Zn Deposit Area,Southwest Guizhou,China[J].Earth Science-Journal of China University of Geosciences,2022,47(1):368-386. |
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| Authors: | Zhou Liang Hu Yuzhao Tan Xiaolin Li Piyou Cheng Yong |
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| Institution: | (Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Mineral Resources Prediction and Evaluation Engineering Laboratory of Yunnan Province,Kunming 650093,China;Mining Engineering Faculty,Kunming Metallurgy College,Kunming 650093,China) |
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| Abstract: | Pu’an Pb-Zn deposit area in Guizhou Province is situated in the Southwest Guizhou Depression on the northwest edge of South China fold belt.The ore bodies occur in the Carboniferous dolomitic limestone and dolomite,with significant characteristics of structural ore-control.Two-dimension(2 D)seismic profile of the NW-SE striking passes through the Pb-Zn mine area,clearly revealing the stratum and NE-SW trending structural framework of the research area.From the shallow Devonian to the deep Neoproterozoic,a total of 3 seismic reflectors and 3 reflecting units are labeled.Based on recognition of two crucial surfaces of angular unconformity,the“2+1”basin stratigraphic framework consisting of double basement and single sedimentary cover is clearly represented,which provides new evidence for the tectonic attribute of Southwest Guizhou.The basin structural framework in the mining area is composed of two controlling thrust faults with secondary reverse faults and folds.Field observation and structural analysis of the fault outcrops and its secondary structures shown in the seismic profile were conducted,moreover the ore-controlling faults of 4 deposits were dissected.It is proposed that the Indosinian compressional deformation would be related to the ore-forming age.Based on the structural framework of the seismic interpretation,the role of each structural factor is detailed analysis in the mineralization process.The two deep-cut basement faults(first-order fault)would be fluid migration channels from atmospheric water and deep basin.The Guangxi unconformity would act as a lateral migration pathway.The thin-skin faults that cut across the Lower-Middle Devonian Huohong Formation(aquifuge)acted as a vertical migration conduit for ore-forming liquid to upward-rise to the Carboniferous mineralization.Combined with the structural ore-controlling characteristics of representative deposits,a model of basin-scale structural ore-controlling of the Pu’an lead-zinc study area was established. |
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| Keywords: | seismic profile structural ore-control model basin structural-stratigraphic framework Southwest Guizhou structural geology |
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