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首页> 外文期刊>Water resources >Water regime and variations in hydrochemical characteristics of the soda Salt Lake Khilganta (Southeastern Transbaikalia)
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Water regime and variations in hydrochemical characteristics of the soda Salt Lake Khilganta (Southeastern Transbaikalia)

机译：苏打盐湖Khilganta（东南贝加尔卡利亚）的水情和水化学特征的变化

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摘要

Hydrochemical and biogeochemical processes in Lake Khilganta were studied during more than ten years. The lake was shown to pass through periods of wetting and drying. This is accompanied by considerable changes in water chemistry and microbiological processes. During the passage from a wet to a dry period, lake water mineralization increases from 40 to 260 g/l and pH decreases from 9.9 to 7.1. At the same time, the isotope composition of organic matter carbon in bottom deposits becomes lighter (from -15.6 to -30.6‰), as well as that of carbon in carbonates (from +4.1 to -8.6‰), due to the lower rate of photosynthetic processes in lake bacterial mats. The order of salt precipitation during the passage from a wet to a dry period and the mechanism of maintaining water pH are considered. A possible similarity between the modern processes in Lake Khilganta and the processes in analogous Pre-Cambrian water bodies is discussed, and the hypothesis regarding the possibility of wider development of soda water bodies at early stages of Earth's history is considered.
机译：在超过十年的时间里，研究了希尔根塔湖的水化学和生物地球化学过程。显示该湖经历了湿润和干燥的时期。随之而来的是水化学和微生物过程的巨大变化。在从潮湿到干燥的过程中，湖水的矿化度从40 g / l增加到260 g / l，pH从9.9降低到7.1。同时，由于速率较低，底部沉积物中有机物碳的同位素组成更轻（从-15.6至-30.6‰），而碳酸盐中碳的同位素组成更轻（从+4.1至-8.6‰）。细菌垫的光合作用过程考虑了从潮湿到干燥的过程中盐析出的顺序和维持水的pH值的机理。讨论了希尔甘塔湖的现代过程与类似前寒武纪水体的过程之间可能存在的相似性，并考虑了关于地球历史早期苏打水体更广泛发展的可能性的假设。

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