| 贵州务-正-道地区铝土矿成矿模式与找矿模型 |
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| 引用本文： | 金中国,邹林,张力,郑明泓,韩英,谷静,谢樨,陈兴龙,王洪.贵州务-正-道地区铝土矿成矿模式与找矿模型[J].沉积学报,2018,36(5):914-926. |
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| 作者姓名： | 金中国 邹林 张力 郑明泓 韩英 谷静 谢樨 陈兴龙 王洪 |
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| 作者单位： | 1.贵州省有色金属和核工业地质勘查局, 贵阳 550005; |
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| 基金项目： | 国家“十二五”科技支撑重点项目（2011BAB04B04）；贵州省基础性、公益性研究地质项目（2010-120）；中央地质勘查基金项目（2011520026，2011520027，2012520001） |
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| 摘 要： | 务-正-道铝土矿成矿区位于黔北-渝南接壤地带，现已发现大型铝土矿床10余个，探明资源储量超7亿吨，是贵州重要的铝矿资源地。铝土矿产于下志留统韩家店组碎屑岩或上石炭统黄龙组碳酸盐岩古侵蚀面之上的下二叠统大竹园组中，属古风化沉积型铝土矿床。基于前人成矿物质来源、成矿环境、成矿作用及矿床成因类型的研究成果，进一步探讨了区域构造演化与铝土矿形成的关系，结合典型矿床成矿地质特征，揭示了研究区铝土矿成矿的地质-地球化学演化过程。依据1∶10万~1∶1万遥感影像特征的提取，总结了含矿岩系及相邻层位、主要构造的识别标志，论述了铁化、泥化异常与含矿岩系的空间展布关系，刻画出大比例尺度的遥感三维立体影像模型。通过多个铝土矿区浅层地震反射波法、高密度电阻率法、频率域三极测深法、音频大地电磁测深法、大功率激电测深法等物探方法的应用和对比研究，反演出“高、厚、凹、拐”物探异常找矿标志，建立了典型铝土矿床三维地质-地球物理找矿预测模型。在上述基础上，集成了铝土矿勘查技术方法体系，建立了地质、物探、化探、遥感综合找矿模型，示范指导找矿预测，经工程验证，取得显著的找矿效果，表明建立的找矿模型在该研究区探寻铝土矿适宜、有效。
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| 关 键 词： | 铝土矿 勘查技术集成 成矿模式 找矿模型 贵州务- 正- 道地区 |
| 收稿时间： | 2017-04-06 |
Metallogenic and Prospecting Models of Bauxite in Wuchuan-Zheng'an-Daozhen Area,Guizhou Province |
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| Institution: | 1.Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou, Guiyang 550005, China;2.China Non-Ferrous Metals Resource Geological Survey, Beijing 100012, China;3.China Non-Ferrous Metal(Guilin) Geology and Mining Co., Ltd., Guilin 541004, China;4.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
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| Abstract: | The Wuchuan-Zheng'an-Daozhen Bauxite metallogenic belt, located in the contiguous area of north Guizhou and south Chongqing, is an important bauxite resource area in Guizhou with more than 10 large deposits and 800 million tons reserves discovered. The bauxite occurred in the lower Silurian Hanjiadian formation of clastic rocks or the lower Permian Dazhuyuan Formation above the ancient erosion surface of Carboniferous Huanglong formation of carbonate. The deposits belongs to ancient weathering sedimentary type. Based on previous researchs of ore-forming sources, ore-forming environments, mineralization and ore deposit genesis types, the relationship between regional tectonic evolution and bauxite formation was studied in this paper, to disclosure the geology-geochemistry evolution process of bauxite mineralization combined with special geological features. According to extraction of 1:100 000-1:10 000 remote sensing image features, the series of ore-bearing rocks and adjacent layers, main structure identification, relationship among iron, mud anomaly and the space distribution of the rock series were summarized to establish a remote sensing 3D image model in large scale. Through the application and comparative study of multiple bauxite mining areas by geophysical methods, such as Shallow seismic reflection wave method, high density resistivity method, frequency domain tripole sounding method, audio earth electromagnetic sounding method, high power excitation sounding method, the geophysical prospecting marks of “high, sunken, concave, thick” and typical mine 3D geological and geophysical prospecting prediction model of the bauxite deposit was established. On the study above, the technical method system of bauxite exploration and furtheron the geological, geophysical, geochemical and remote sensing prospecting models may demonstrate guidance to prospect and acquire remarkable prospecting effect through engineering verification, indicating the proposed mining model is suitable and effective in the exploration of bauxite in the study area. |
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