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Bangkog Co (Bangkog Tso; Bange Cuo; Bangge Cuo), Baingoin Co. (Bange Co.), Nagchu Prefecture (Naqu Prefecture), Tibet Autonomous Region, China

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Latitude & Longitude (WGS84): 31° 43' North , 89° 29' East
Latitude & Longitude (decimal): 31.7166666667, 89.4833333333
Name(s) in local language(s):班戈锘 (班戈湖), 班戈县 (དཔལ་མགོན་རྫོང་), 那曲地区 (ནག་ཆུ་ས་ཁུལ་), 西藏自治区, 中国
Other regions containing this locality:Asia

Bangkog Co is a salt lake in the interior part of the Tibetan Plateau. It consists of three sub-basins (called Lakes I, II and III) joined by narrow channels. Lake I is the upstream sub-basin and has a water-surface elevation of 4525 m asl. There is no surface input into Lake I. Lake I discharges into Lake II (water-surface elevation of 4522 m asl) which in turn discharges into Lake III (water-surface elevation of 4520 m asl). A small stream discharges into Lake III from the southeast. This is the only surface input to the lakes, which are otherwise fed by direct precipitation and springs. The lakes have water depths between 0.3 m (Lake I) and 1 m (Lake III). Lake I and II are seasonally dry, however Lake III is a permanent water body. At their maximum (summer) extent, Lakes I, II and III have areas of 5.4 km2, 50 km2 and 80 km2 respectively. The lake water is saline. The salt content varies from is 168.7 g/l to 403 g/L and the pH from 9 to 10.2. The modern sediments consist of mirabilite bearing carbonate clay in the centre of the lake and mirabilite-bearing carbonate sand with gravels in the nearshore zone. The three saline lakes are inset within a playa. The existence of this playa indicates that Bangkog Lake was larger in the past. The lake basin originated through faulting in the Mesozoic. The underlying bedrock is Cretaceous conglomerate, sandstone and argillite. The climate in the catchment is cold (annual mean temperature of 1.5°C) and arid (total annual precipitation of 308.3 mm, total annual evaporation of 2238.6 mm).

Mineral List

19 valid minerals.

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Xiyu Zheng and Shengsong Yu (1981): Formation of the salt lakes resources and its utiliztation on the Xizang plateau. Scientia Geographica Sinica 1(1), 66-76 (in Chinese with English abstract).

Chang Xu (1985): Primary study of clay minerals and its significance in salt lake sediments of the Qinghai-Tibet plateau. Scientia Geologica Sinica 1(1), 87-96 (in Chinese with English abstract).

Shaoxiu Yang (1991): Saline deposits and minerals of salt lakes in Qinghai-Xizang plateau. Journal of Lake Sciences 3(1), 1-10 (in Chinese with English abstract).

Xiyu Zheng (1994): Comprehensive utilization of salt lake resources over Qinghai-Xizang (Tibet) plateau. Journal of Lake Sciences 6(3), 267-275 (in Chinese with English abstract).

Qingzhong Wang, Yingkai Xiao, Chonggeng Zhang, Haizhen Wei, and Zhiqi Zhao (2001): Boron isotopic compositions of some boron minerals in Qinghai and Tibet. Bulletin of Mineralogy, Petrology and Geochemistry 20(4), 344-366 (in Chinese with English abstract).

Yu, G., Harrison, S.P., and Xue, B. (2001): Lake status records from China: Data Base Documentation. MPI-BGC Technology Report No. 4, pp. 157-161.

Yuanyi Zhao, Mianping Zheng, Xingong Cai, Pingjia Zhao, Wen Zhao, Yunwu Wang, and Xu Ma (2004): Modern lake resources and environment on the western side of the Tibet section of the phase-II project of the Qinghai-Tibet railway. Geological Bulletin of China 23(7), 680-685 (in Chinese with English abstract).

Mianping Zheng and Xifang Liu (2010): Hydrochemistry and minerals assemblages of salt lakes in the Qinghai-Tibet plateau, China. Acta Geologica Sinica 84(11), 1585-1600 (in Chinese with English abstract).

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