| 青藏高原湖泊水化学与盐度的相关性初步研究 |
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| 引用本文： | 王海雷,郑绵平.青藏高原湖泊水化学与盐度的相关性初步研究[J].地质学报,2010,84(10):1517-1522. |
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| 作者姓名： | 王海雷 郑绵平 |
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| 作者单位： | 中国地质科学院矿产资源研究所,北京,100037;国土资源部盐湖资源与环境重点实验室,北京,100037;中国地质科学院盐湖与热水研究发展中心,北京,100037 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 本文综合分析了青藏高原地区400多个湖泊的水化学成分(Mg2+、Ca2+、Sr2+、Sr/Ca和Mg/Ca)与湖水盐度的相关关系,以及这种关系随着湖水变化(不同采样时间和采样点以及蒸发实验)而产生的变化规律。认为:在青藏高原湖泊中,Mg2+与盐度具有较为稳定的正相关关系,而Ca2+、Sr2+、Sr/Ca以及Mg/Ca与盐度的相关性较弱且不稳定。而在特定的水化学类型的湖泊中,碳酸盐型湖泊的Mg2+、Ca2+以及Mg/Ca与盐度均没有明显的相关性。硫酸盐型湖泊中Mg2+和盐度呈现较高的正相关关系,而Ca2+以及Mg/Ca与盐度的相关性仍很弱。而在氯化物型湖泊中,Mg2+与盐度呈更强的正相关关系,Ca2+与盐度也呈一定的正相关关系,而Mg/Ca与盐度的相关性依然很弱。在特定的单个湖泊中,Ca2+以及Mg/Ca与盐度的相关性仍然不稳定或很弱,而Mg2+与盐度仍然保持明显的正相关关系。在青藏高原利用湖相沉积恢复特定湖区古环境演化序列的时候,Mg2+浓度是湖水古盐度一个较好的转换指标,而在应用Mg/Ca这一指标时应谨慎。
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| 关 键 词： | 青藏高原，湖泊，Mg2+，Mg/Ca，盐度，相关性 |
| 收稿时间： | 2009/6/21 0:00:00 |
| 修稿时间： | 7/6/2010 12:00:18 PM |
Priliminary study on relationship between hydrochemistry and salinity of lakes in the Qinghai-Tibetan Plateau |
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| wanghailei and Zheng Mianping.Priliminary study on relationship between hydrochemistry and salinity of lakes in the Qinghai-Tibetan Plateau[J].Acta Geologica Sinica,2010,84(10):1517-1522. |
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| Authors: | wanghailei and Zheng Mianping |
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| Institution: | Institute of Mineral Resources, Chinese Academy of Geological Sciences,Institute of Mineral Resources, Chinese Academy of Geological Sciences |
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| Abstract: | Relationship between hydrochemistry (Mg2+, Ca2+, Sr2+, Sr/Ca and Mg/Ca) and salinity of more than four hundred lakes in the Qinghai-Tibetan Plateau were analyzed. And its variation characteristics (differing from different sampling place and time, as well as Natural Evaporation) were also discussed. Mg2+ showed a stable positive relationship with salinity in lakes in the Qinghai-Tibetan Plateau. While Ca2+, Sr2+, Sr/Ca and Mg/Ca showed poor and unstable relationship with salinity. In water type specified lakes, however, it differed remarkably from different water type lakes. No clear relationship observed between Mg2+, Ca2+ and Mg/Ca and salinity in carbonate type lakes. Mg2+ showed positive relationship with salinity in sulphate type lakes, and Ca2+ and Mg/Ca remained poor relationship with salinity. While in chloride type lakes, Mg2+ showed distinct positive relationship with salinity, and Ca2+ also showed positive relationship to some extent with salinity. Mg/Ca still showed no clear relationship with salinity. In a single lake, Ca2+ and Mg/Ca still showed unstable and/or poor relationship with salinity, while Mg2+ still kept remarkable positive relationship with salinity. It was concluded that Mg2+ is a useful indicator for paleosalinity reconstruction in the Qinghai-Tibetan Plateau. Care should be taken while use Mg/Ca in recovering paleoenvironment and paleoclimate. |
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| Keywords: | the Qinghai-Tibetan Plateau lakes Mg2+ Mg/Ca salinity relationship |
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