陕北奥陶纪盐田马家沟组马五段含盐系特征及钾盐找矿探讨
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摘要
陕北奥陶纪盐田是我国重要的成盐盆地之一。在充分分析前人研究工作基础上,结合2015年陕西省第一批地质勘查基金项目《陕西省延川县永坪地区石盐矿普查》成果,从陕北奥陶纪盐田最主要含盐系马家沟组马五段马五4和马五6两个最主要含盐系的剖面岩石组合、沉积厚度、盐类矿物组成、主要化学成分、微量元素变化及含盐系形态变化等方面对其进行了较深入的分析研究和介绍,对陕北奥陶纪盐田各含盐系的保存条件进行了总结,并指出陕北盐盆西南部边缘次级凹陷可能为今后盐盆钾盐找矿的重点区域。
The Ordovician salt field in Northern Shaanxi is one of the important salt basins in China. This article is based on a thorough analysis of predecessors' research work. Combined with the results of the first batch of geological survey funds in Shaanxi Province in 2015,the general survey of stone salt mines in Yongping county,Yanchuan county,Shaanxi province.This article have been analyzed and introduced on the rock composition,sedimentary thickness,composition of salt minerals,main chemical composition,and changes in trace elements and morphological changes in salt-containing systems of the two major salt systems member 54 and 56 in Majiagou Formation. Summarizes the preservation conditions of the salt systems in the basin. Pointed out that the secondary depression on the southwest edge of the northern Shaanxi salt basin may be a key area for prospecting potash salt in the future.
The Ordovician salt field in Northern Shaanxi is one of the important salt basins in China. This article is based on a thorough analysis of predecessors' research work. Combined with the results of the first batch of geological survey funds in Shaanxi Province in 2015,the general survey of stone salt mines in Yongping county,Yanchuan county,Shaanxi province.This article have been analyzed and introduced on the rock composition,sedimentary thickness,composition of salt minerals,main chemical composition,and changes in trace elements and morphological changes in salt-containing systems of the two major salt systems member 54 and 56 in Majiagou Formation. Summarizes the preservation conditions of the salt systems in the basin. Pointed out that the secondary depression on the southwest edge of the northern Shaanxi salt basin may be a key area for prospecting potash salt in the future.
引文
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[6]陕西省延川县永坪地区石盐矿普查地质报告[R].中国建筑材料工业地质勘查中心陕西总队,2016.
[2]孟庆.陕北奥陶系成盐地质条件及找钾远景[J].化工矿产地质,1996,18(01):22-30.
[3]张吉森,曾少华,黄建松,等.鄂尔多斯东部地区岩盐的发现、成因及意义[J].沉积学报,1991,9(02):34-43.
[4]杨伟利,王毅,王传刚,等.鄂尔多斯盆地多种能源矿产分布特征与协同勘探[J].地质学报,2010,84(04):579-586.
[5]张永生,邢恩袁,郑绵平,等.陕北奥陶纪盐盆厚层钾石盐高矿化段的发现及其找钾启示[J].地球学报,2014,35(06):693-702.
[6]陕西省延川县永坪地区石盐矿普查地质报告[R].中国建筑材料工业地质勘查中心陕西总队,2016.