Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate

Ju, Jianting; Zhu, Liping; Wang, Junbo; Xie, Min; Zhen, Xiaolin; Wang, Yong; Peng, Ping

doi:10.1007/s10933-009-9343-6

Cited by 30 publications

(17 citation statements)

References 25 publications

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“…This suggests stronger carbonate weathering compared to silicate weathering. Unlike in any other samples, ) is higher than (Na + +K + ) in river LA, which shows that carbonate weathering has a greater influence on the ion composition of the water (Ju et al, 2010). However, halite weathering greatly impacts river LB, as shown by (Na + +K + ) being four times higher than (Ca 2+ +Mg 2+ ) in those samples.…”

Section: Effect Of Chemical Weathering On Inflow Componentsmentioning

confidence: 70%

“…Because surface water CO 3 2− concentrations are low in northern Tibet (Wang and Dou, 1998), alkalinity is represented by HCO 3 − . Using ionic charge balance (Ju et al, 2010;Wu et al, 2008), the equivalent of HCO 3 − was calculated to determine TDS.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

“…the Qinghai-Tibet Plateau (Ju et al, 2010;Wang et al, 2010a). Among the different inflows, the ratios of Cl…”

Section: General Characteristics and Controlling Factors Of Water Chementioning

confidence: 99%

“…These studies have greatly enhanced the knowledge about the chemical characteristics and evolution of lake and river waters on the Qinghai-Tibet Plateau. For example, Ju et al (2010) showed that Ca 2+ , Mg 2+ , and HCO 3 − were the dominant ions in Lake Pumayum Co and its inflows, which are located in southern Tibet. Spatial variation in the chemical composition of the lake water was shown to depend on the characteristics of its inflows.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

Wang

Liu

Jiang

et al. 2016

Journal of Environmental Sciences

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The geochemistry of natural waters in the Changtang Nature Reserve, northern Tibet, can help us understand the geology of catchments, and provide additional insight in surface processes that influence water chemistry such as rock weathering on the Qinghai-Tibet Plateau. However, severe natural conditions are responsible for a lack of scientific data for this area. This study represents the first investigation of the chemical composition of surface waters and weathering effects in two lake basins in the reserve (Lake Dogaicoring Qiangco and Lake Longwei Co). The results indicate that total dissolved solids (TDS) in the two lakes are significantly higher than in other gauged lakes on the Qinghai-Tibet Plateau, reaching 20-40 g/L, and that TDS of the tectonic lake (Lake Dogaicoring Qiangco) is significantly higher than that of the barrier lake (Lake Longwei Co). Na + and Cl − are the dominant ions in the lake waters as well as in the glacier-fed lake inflows, with chemical compositions mainly affected by halite weathering. In contrast, ion contents of inflowing rivers fed by nearby runoff are lower and concentrations of dominant ions are not significant. Evaporite, silicate, and carbonate weathering has relatively equal effects on these rivers. Due to their limited scope, small streams near the lakes are less affected by carbonate than by silicate weathering.

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Section: Effect Of Chemical Weathering On Inflow Componentsmentioning

confidence: 70%

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

“…the Qinghai-Tibet Plateau (Ju et al, 2010;Wang et al, 2010a). Among the different inflows, the ratios of Cl…”

Section: General Characteristics and Controlling Factors Of Water Chementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

Wang

Liu

Jiang

et al. 2016

Journal of Environmental Sciences

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“…Therefore, endogenic calcite may be an important feature of sediments in this lake. This was discussed in anther paper (Ju et al 2009). …”

Section: Horizontal Variation Of Hydrochemistry Characteristics Of Lamentioning

confidence: 94%

Further discussion about the features of Lake Puma Yum Co, South Tibet, China

Zhu

Wang

et al. 2010

Limnology

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Further discussion about the limnological features of Lake Puma Yum Co, South Tibet, China, is provided based on the results of several investigations. By using depth data from all over the lake, the whole submarine topography has been compiled. Horizontal analysis of the water's physicochemical features indicates that compared with the relatively uniform water features at other lake areas, apparent spatial heterogeneity exists in the water of the subaquatic alluvial fan induced by the Jiaqu River, the biggest inflow. Vertical analysis of water characteristics using two-factor analysis of variance with no reexperiment indicates that temperature, dissolved oxygen, and pH of the water vary with water depth rhythmically, whereas other parameters demonstrate no evident vertical variation, which shows that chemical stratification is not obvious. But this does not exclude slightly higher concentrations of Ca 2? induced by lower pH at the bottom of deep lake water. The hydrochemistry difference between inflow water and lake water reveals the loss of Ca 2? in lake water, which indicates calcite deposition may be an important characteristic of lake sediment.

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The spatial distribution of sedimentary compounds and their environmental implications in surface sediments of Lake Khar Nuur (Mongolian Altai)

Strobel

Struck

Zech

et al. 2021

Earth Surf Processes Landf

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Lake sediments are valuable natural archives to reconstruct paleoclimate and paleoenvironmental changes which consist of inorganic and organic sediment compounds of allochthonous origin from the catchment and of autochthonous production in the lake. However, for robust paleo-reconstructions it is important to develop a better understanding about sedimentation processes, the origin of inorganic and organic sediment compounds and their distribution within the lake. In this context, modern process studies provide important insights, although environmental and anthropological changes can affect the spatial distribution of sediment compounds through time. Therefore, in this study the spatial distribution of grain size and geochemical proxies in 52 surface sediment samples from Lake Khar Nuur, a small high-altitude lake in the Mongolian Altai with a small and anthropogenically used hydrological catchment, is investigated. The results show a distinct sediment focussing in the two deep basins of the lake, which therefore act as accumulation zones. In those accumulation zones, total organic carbon (TOC), total nitrogen (N) and their isotopic composition (δ 13 C TOC , δ 15 N) as well as n-alkanes indicate that organic sediment compounds are a mixture of both allochthonous and autochthonous origin. While the recent catchment vegetation consists of grasses/herbs and the shrub Betula nana (L.) with distinct differences in their n-alkane homologue patterns, those differences are not reflected in the sediment surface samples which rather indicates that grass-derived n-alkanes become preferentially incorporated in the lake. Extensive anthropogenic activity such as grazing and housing in the southern part of the catchment causes soil erosion which is well reflected by high TOC, N and sulphur (S) contents and 15 N depleted δ 15 N values at the central southern shore, i.e. increased allochthonous sediment input by anthropogenically-induced soil erosion. Overall, the surface sediments of Lake Khar Nuur origin from allochthonous and autochthonous sources and are focussed in the accumulation zones of the lake, while their distribution is both environmentally and anthropogenically driven.

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Water and sediment chemistry of Lake Pumayum Co, South Tibet, China: implications for interpreting sediment carbonate

Cited by 30 publications

References 25 publications

Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

Comparison of surface water chemistry and weathering effects of two lake basins in the Changtang Nature Reserve, China

Further discussion about the features of Lake Puma Yum Co, South Tibet, China

The spatial distribution of sedimentary compounds and their environmental implications in surface sediments of Lake Khar Nuur (Mongolian Altai)

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