Lake Elton

Lake Elton Эльтон
The shores of Lake Elton
Lake Elton Эльтон Location within Russia Show map of Russia Lake Elton Эльтон Lake Elton Эльтон (Volgograd Oblast) Show map of Volgograd Oblast Lake Elton Эльтон Lake Elton Эльтон (Continental Asia) Show map of Continental Asia
Location	Volgograd Oblast
Coordinates	49°8′0″N 46°40′0″E / 49.13333°N 46.66667°E / 49.13333; 46.66667
Type	Hypersaline lake
Basin countries	Russia
Surface area	150 km2 (58 sq mi)
Max. depth	0.6 m (2 ft 0 in)
Surface elevation	−18 m (−59 ft)

Lake Elton (Russian: Эльтон; Kazakh: Эльтон, romanized: Elton) is a salt lake in Volgograd Oblast, Russia, near the border with Kazakhstan. It has an area of 152 km² and is about 0.1 m deep (in spring 0.7 to 0.8 m). Its surface is 18 m below sea level.^[1] The lake’s name originates from the Mongol language: “Altyn-Nor” (Golden Bottom). Long ago local nomads used the lake’s mineral-rich mud for skin and respiratory treatments.^[2] For centuries, Lake Elton was a favorite location for Russian rulers and nobles. One can still see remnants of Empress Yekaterina II’s “bath” there.^[2]

It is the largest mineral lake in Europe and one of the most mineralized in the world. The lake is filled with a saturated salt solution. Mineralization is 200–500 g/L. Salt, extracted from the lake since the early 18th century, is used for the production of magnesium chloride.^[3] The water contains Dunaliella salina algae that give a reddish shade to the lake. At the bottom of the lake are salt deposits (mainly NaCl, KCl) and beneath them, a layer of mineral hydrogen sulfide mud.