| 云南省江城地区盐盆地重力勘探与深部找钾启示 |
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| 作者姓名： | 刘璎 郑绵平 于常青 张震 高磊 |
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| 作者单位： | 1.兰州城市学院,兰州 730070; 2.中国地质科学院矿产资源研究所,北京 100037; 3.中国地质科学院地质研究所,北京 100037; 4.中国煤炭地质总局华盛水文地质勘察工程公司,邯郸 056000 |
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| 基金项目： | 中国地质调查局“油钾兼探实施方案和调查评价部署(编号: 1212011085524)”“滇西南中生代盐盆地钾盐资源调查评价(编号: 1212011085517)”“NSFC-云南联合重点基金项目(编号: U0833601))”“地质云系统集成与共享服务(编号: DD20190398)”项目联合资助 |
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| 摘 要： | 云南省江城勐野井钾盐矿是目前我国发现的唯一固体钾盐矿。该地区地质构造复杂,近几年通过野外地质、地球物理及钻井勘探 ,认为钾盐来自深部侏罗系,并沿断裂构造带挤压塑流到表层,可能在深部还存在大面积的“盐源”。为实现找矿突破,亟须了解控制盐矿形成的构造及围岩的三维结构特征。通过对江城地区高精度重力数据位场分离、边缘检测、3D物性反演的地球物理处理与解释,获得了勐野井地区江城湖盆的基底变化、断裂展布等地质信息,确定了研究区构造格架、地下密度体的三维分布与岩盐矿的关系,推断在勐野井矿区西北深部可能还有侏罗系盐岩甚至钾盐的存在,该地区将是未来找矿工作的重点。研究成果为江城地区下一步钾盐矿勘查提供了线索和依据。
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| 关 键 词： | 江城 勐野井钾盐 重力勘探 位场分离 边缘检测 3D物性反演 |
| 收稿时间： | 2019-10-24 |
Salt basin gravity exploration and enlightenment of deep potassium ore prospecting in Jiangcheng area of Yunnan Province |
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| Authors: | LIU Ying ZHENG Mianping YU Changqing ZHANG Zhen GAO Lei |
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| Institution: | 1. Lanzhou City University, Lanzhou 730070, China; 2. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; 4. The Company of Huasheng Hydrological Geological Survey, China National Administration of Coal Geology, Handan 056000, China |
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| Abstract: | Mengyejing salt mine in Jiangcheng of Yunnan Province is the only solid potash deposit founded in China. The geological structure is relatively complex in this area. Through geological,geophysical and drilling exploration, the authors thought potash beds were squeezed up to the surface layer, along with the faults from the deep Jurassic potassic rocks, and there may be salt sources or more large ores under the deposit. In order to realize the ore exploration breakthrough, the deep structure and characteristics and 3D structure model of salt rocks need studying. The basement changes and fault distribution of the Jiangcheng basin were obtained using potential field separation, multi-scale edge detection and 3D physical inversion to process and interpret the high precision gravity data. And other information such as the structural framework, 3D distribution of density of underground body and the relationship with salt mine distribution was also obtained. The authors deduce that there may be salt mine and potassic salt ores below the deep northwestern Mengyejing ore field, so this area should be the key area for the following exploration of potassic salt. These results will provide clues and direction for Jiangcheng potassic prospecting in future. |
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| Keywords: | Jiangcheng Mengyejing potash salt gravity exploration potential field separation multi-scale edge detection 3D physical inversion |
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