| 柴达木盆地中西部背斜构造深层卤水水化学特征与成因 |
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| 引用本文： | 韩光,樊启顺,刘久波,袁文虎,胡燕.柴达木盆地中西部背斜构造深层卤水水化学特征与成因[J].盐湖研究,2021,29(4):1-11. |
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| 作者姓名： | 韩光 樊启顺 刘久波 袁文虎 胡燕 |
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| 作者单位： | 青海省柴达木综合地质矿产勘查院,青海省柴达木盆地盐湖资源勘探研究重点实验室, 青海 格尔木 816099;中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室, 青海 西宁 810008;青海省盐湖地质与环境重点实验室,青海 西宁 810008 作者简介:韩 光1982-,男,高级工程师,专业研究方向:盐类矿产资源综合评价。Email:114472026@qq.com。 |
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| 基金项目： | 青海学者专项(QH201802)；青海省自然科学基金面上项目(2021-ZJ-932)；国家自然科学基金面上项目(41872093) DOI:10.12119/j.yhyj.202104001 柴达木盆地中西部背斜构造深层卤水 水化学特征与成因韩光1,樊启顺2,3,刘久波1,袁文虎1,胡燕1 (1.青海省柴达木综合地质矿产勘查院,青海省柴达木盆地盐湖资源勘探研究重点实验室, 青海 格尔木 816099；2.中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室, 青海 西宁 810008；3.青海省盐湖地质与环境重点实验室,青海 西宁 810008) |
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| 摘 要： | 柴达木盆地西部背斜构造深层卤水资源勘查和评价成果显示,第三系背斜构造赋存深层卤水,具有良好的资源成矿条件,且潜力大。采集柴达木盆地中西部(一里坪拗陷和三湖拗陷)9处背斜构造深层卤水,分析了其水化学特征与成因。结果表明,深层卤水矿化度一般低于150 g/L,水化学类型均为氯化物型；K+、Na+、Mg2+含量较低,不具找矿价值；而B2O3、Li+含量普遍高于评价指标,Br-、I-含量普遍高于综合评价指标,为主要成矿元素；卤水的元素特征系数和分布规律及微量离子组成揭示,深层卤水是大气降水溶滤盆地周缘岩浆岩和火山岩及火山热泉的补给后,汇入古近纪—新近纪湖盆经蒸发浓缩封存在地层中的沉积卤水。
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| 关 键 词： | 柴达木盆地 深层卤水 水化学特征 成因 |
| 收稿时间： | 2021/7/18 0:00:00 |
Origin and Hydrochemistry of Deep Brines from Anticlinal Reservoir in the Western-Central Qaidam Basin |
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| HAN Guang,FAN Qi-shun,LIU Jiu-bo,YUAN Wen-hu,HU Yan.Origin and Hydrochemistry of Deep Brines from Anticlinal Reservoir in the Western-Central Qaidam Basin[J].Journal of Salt Lake Research,2021,29(4):1-11. |
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| Authors: | HAN Guang FAN Qi-shun LIU Jiu-bo YUAN Wen-hu HU Yan |
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| Abstract: | Resource exploration and evaluation of deep brines from Dalangtan and Lenghu anticlinal reservoirs in the western Qaidam Basin had been conducted over the past twenty years.These studies have shown that anticlinal reservoirs reserve deep brines,which have good metallogenic conditions and great potential.Eighteen deep brines from nine anticlinal reservoirs in the western-central Qaidam Basin were collected and analyzed for major and trace elemental concentrations in this study.Similarly,origin and hydrochemistry of those deep brines were discussed,combining with element characteristic coefficient,distribution pattern and trace elemental concentrations in the different reservoirs.The results indicate that the total dissolved solids(TDS)and hydrochemical types of deep brines are generally less than 150 g/L and chloride-type,respectively.The K+,Na+ and Mg2+ concentrations is low,indicating no potential of resource exploitation,while B2O3,Li+,Br-and I-concentrations are higher than comprehensive evaluation index,indicating good potential of resource exploitation.Trace ionic concentrations,element characteristic coefficient and distribution pattern of deep brines reveal that these resource solutes in deep brines are originated from dissolving magmatic and volcanic rocks by meteoric waters,and then inflowing into paleomega-lake during Paleogene and Neogene,and reserved and forming formation brines through evaporation and concentration along with evolution of paleolake. |
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