| 海相钾盐矿床溶滤卤水找钾指标体系:
以川东北天星桥构造寒武系深部地下卤水为例 |
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| 引用本文： | 王淑丽,郑绵平,李博昀,王占文,王英林,王凡,苏奎,李津,王莹.海相钾盐矿床溶滤卤水找钾指标体系:
以川东北天星桥构造寒武系深部地下卤水为例[J].地球科学,2022,47(1):2-14. |
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| 作者姓名： | 王淑丽 郑绵平 李博昀 王占文 王英林 王凡 苏奎 李津 王莹 |
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| 作者单位： | 1.中化地质矿山总局地质研究院, 北京 100101 |
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| 基金项目： | 国家自然科学基金青年科学基金项目(No.41403019);中国地质调查局项目(Nos.DD20160346,DD20190379)。 |
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| 摘 要： | 长期工作成果显示我国现阶段常用的找钾指标Br×103/Cl值偏低.创新性地应用"以古验古"的溶滤实验与地质统计法厘清了海相蒸发盐盆地找钾指标体系,充分考虑了不同地质年代海水成分的变化,也可克服"将今论古"应用于现代海水在等温等压条件下实验数据的不足.通过对世界上典型钾盐矿床的石盐、含钾石盐及钾盐(含光卤石)进行溶滤实验...
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| 关 键 词： | 深部地下卤水 卤水成因 找钾指标体系 川东北 天星桥构造 寒武系 |
| 收稿时间： | 2020-12-16 |
Index System for Potassium Prospecting in Marine Potash Deposits:A Case Study of Cambrian Deep Brine from Tianxingqiao Structure of Northeast Sichuan in China |
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| Wang Shuli,Zheng Mianping,Li Boyun,Wang Zhanwen,Wang Yinglin,Wang Fan,Su Kui,Li Jin,Wang Ying.Index System for Potassium Prospecting in Marine Potash Deposits:A Case Study of Cambrian Deep Brine from Tianxingqiao Structure of Northeast Sichuan in China[J].Earth Science-Journal of China University of Geosciences,2022,47(1):2-14. |
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| Authors: | Wang Shuli Zheng Mianping Li Boyun Wang Zhanwen Wang Yinglin Wang Fan Su Kui Li Jin Wang Ying |
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| Affiliation: | (Geology Institute of China Chemical Geology and Mine Bureau,Beijing 100101,China;Qaidam Comprehensive Geological and Mineral Exploration Institute of Qinghai Province,Golmud 816099,China;Ministry of Natural Resources Key Laboratory of Saline Lake Resources and Environments,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;General Institute of Chemical Geology Survey of China Chemical Geology and Mine Bureau,Beijing 100101,China) |
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| Abstract: | Through summary of long-term work,it is found that the value of Br×103/Cl,which is commonly used,is low.In this paper,it innovatively clarifies the index system for potassium prospecting of marine evaporative basin by using the"ancient test"leaching experiment and geological statistics method.This method fully considers the changes of seawater composition in different geological years and can also overcome the insufficiency of data for applying modern seawater under isothermal and pressure conditions.Through the leaching experiment of rock salt,potassium-bearing salt and potassium salt(including carnallite)of the typical potash deposits in the world,and combining the previous evaporation experiment results of sea water and marine brine,the index system for potassium prospecting in mineral deposit:Br×103/Cl,K×103/Cl,K/Br,nNa/nCl,nMg/nCl,is summarized.This study aims to trace the origin of the brine which is Cambrian deep brine from Tianxingqiao structure of Northeast Sichuan Basin by analyzing its hydrochemical characteristics(weight ratios of Br×103/Cl,K×103/Cl and K/Br,and molar ratios of nNa/nCl and nMg/nCl).The results show that the hydrochemical characteristics andδD andδ18O values of the brine from Tianxingqiao are similar to those of the brine from dissolution and that of the salt precipitates,but have distinct difference from that of the primary brine.Therefore,it is believed the formation brine from Tianxingqiao is sourced from meteoric water and the brine salinity come from saliferous strata,which might come from the dissolution of halite beds or even the sylvinite beds.This finding is in contrast to the previous studies which held that the brine is primary brine.This study provides new and important information for searching potash deposits in this area. |
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| Keywords: | deep brine brine origin index system for potassium prospecting Northeast Sichuan Basin Tianxingqiao structure Cambrian |
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