| 江西吉泰盆地卤水型锂钾矿物源区岩石地球化学特征及成因分析 |
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| 引用本文： | 王春连,刘丽红,李强,孟令阳,刘成林,张媛媛,王九一,余小灿,颜开.江西吉泰盆地卤水型锂钾矿物源区岩石地球化学特征及成因分析[J].岩石矿物学杂志,2020,39(1):65-84. |
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| 作者姓名： | 王春连 刘丽红 李强 孟令阳 刘成林 张媛媛 王九一 余小灿 颜开 |
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| 作者单位： | 中国地质科学院 矿产资源研究所, 自然资源部 成矿作用与资源评价重点实验室, 北京 100037,中国地质调查局 油气资源调查中心, 北京 100029;北京大学 石油与天然气研究中心, 地球与空间科学学院, 北京 100871,江西省地质矿产勘查开发局 九〇二地质大队, 江西 新余 338099,江西省地质矿产勘查开发局 九〇二地质大队, 江西 新余 338099,中国地质科学院 矿产资源研究所, 自然资源部 成矿作用与资源评价重点实验室, 北京 100037,中国地质大学(北京) 地球科学与资源学院, 北京 100083,中国地质科学院 矿产资源研究所, 自然资源部 成矿作用与资源评价重点实验室, 北京 100037,中国地质科学院 矿产资源研究所, 自然资源部 成矿作用与资源评价重点实验室, 北京 100037,中国地质科学院 矿产资源研究所, 自然资源部 成矿作用与资源评价重点实验室, 北京 100037 |
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| 基金项目： | 国家973计划项目（2011CB403007）；中央级公益性科研院所基本科研业务费专项（YYF201607，K1706，K1415）；地质调查局地质矿产调查评价专项项目（DD20190816，DD20190817，DD20190606，）；国家自然科学基金项目（41502089） |
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| 摘 要： | 中国探明锂钾资源主要分布于青藏、罗布泊盐湖和川西等地,资源开发成本高、难度大,难以满足产业发展需求。目前,在江西吉泰盆地勘探发现卤水中氯化锂浓度超过600 mg/L,氯化钾含量接近1%,锂钾含量均超过或接近工业品位,综合利用价值高。本文在前人研究的基础上,通过对吉泰盆地中生代火成岩开展矿物学、岩石学、地球化学、流体包裹体研究以及高压釜水-岩反应模拟实验,重点研究了时间、温度、流体成分等对火成岩水-岩反应的影响,探究其对富钾锂卤水物质来源和成因机制的指示意义。研究结果表明,吉泰盆地卤水具有高锂低镁的特征,表明吉泰盆地卤水在成因上受到火山活动的影响;研究区岩浆发生不同程度的分异,火成岩蚀变作用强烈,表明地下热液对研究区火成岩的交代作用强烈,火成岩通过水-岩反应为富锂钾卤水矿提供了物质来源;温度是流体对元素的淋滤能力的主要控制因素,高盐度流体是各成矿元素主要的迁移载体;地表成因的卤水中Mg/Li值主要受原岩成分控制;水-岩反应是卤水形成的重要过程,而地表蒸发浓缩是卤水成矿最主要机理。
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| 关 键 词： | 吉泰盆地 白垩系 水-岩反应 富锂钾卤水 含矿卤水成因 |
| 收稿时间： | 2019/8/30 0:00:00 |
| 修稿时间： | 2019/10/20 0:00:00 |
Petrogeochemical characteristics and genetic analysis of the source area of brine type lithium-potassium ore sources area in Jitai basin of Jiangxi Province |
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| WANG Chun-lian,LIU Li-hong,LI Qiang,MENG Ling-yang,LIU Cheng-lin,ZHANG Yuan-yuan,WANG Jiu-yi,YU Xiao-can and YAN Kai.Petrogeochemical characteristics and genetic analysis of the source area of brine type lithium-potassium ore sources area in Jitai basin of Jiangxi Province[J].Acta Petrologica Et Mineralogica,2020,39(1):65-84. |
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| Authors: | WANG Chun-lian LIU Li-hong LI Qiang MENG Ling-yang LIU Cheng-lin ZHANG Yuan-yuan WANG Jiu-yi YU Xiao-can and YAN Kai |
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| Institution: | MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,Oil & Gas Survey, China Geological Survey, Beijing 100083, China;Institute of Oil & Gas, Peking University;School of Earth and Space Sciences, Peking University, Beijing 100871, China,No. 902 Geological Party, Jiangxi Bureau of Geology and Exploration and Development for Mineral Resources, Xinyu 338099, China,No. 902 Geological Party, Jiangxi Bureau of Geology and Exploration and Development for Mineral Resources, Xinyu 338099, China,MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China,MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China and MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | Lithium-potassium ores are mainly distributed in Qinghai, Tibet, Lop Nur salt lake and western Sichuan, but it is expensive and difficult to develop these ores to meet the needs of industrial development. The exploration of Jitai basin in Jiangxi Province shows that the concentration of lithium chloride in brine exceeds 600 mg/L, and the content of potassium chloride is close to 1%, which is close to or even higher than the industrial grade with high comprehensive utilization value. On the basis of previous studies, the authors studied mineralogy, petrology, geochemistry and fluid inclusions and made water-rock reaction simulation experiments by high-pressure autoclave on Mesozoic igneous rocks in Jitai basin so as to study the effects of time, temperature and fluid composition on the water-rock reaction of igneous rocks and explore its indicative significance to the source and mechanism of lithium-potassium rich brine. The following main results were preliminarily obtained:The brine in Jitai basin is characterized by high lithium and low magnesium, indicating that the brine in Jitai basin is affected by volcanic activity; The magma in the study area was differentiated in different degrees with strong igneous alteration, which reveals that the igneous rock was greatly replaced by hydrothermal fluid and provided material source for lithium-potassium rich brine mineralization; Temperature is the main control factor of the leaching capability of fluid to elements and high-salinity fluid is the main transport carrier of ore-forming elements; The Mg/Li ratio in the brine of surface origin is mainly controlled by the original rock composition. Water-rock reaction is an important process of brine formation, and surface evaporation and concentration constitute the main mechanism of brine mineralization. |
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| Keywords: | Jitai basin Cretaceous water-rock reaction lithium-potassium rich brine origin of mineral-bearing brine |
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