Caka Lake

Chaka Salt Lake lies near the eastern end of the Qaidam Basin in Amdo, about 3,060 metres above the sea. Its shallow, oval basin holds a thick layer of sodium-rich salt close to the water surface. In Tibetan, Chaka means simply “salt lake,” while the Mongolian name Dabsun Nur carries the same meaning. Streams and groundwater feed the basin, but arid winds and strong evaporation leave the water highly saline. The flat salt crust reflects the open plateau sky and often appears as a white surface beneath a bright blue vault.

The lake lay within a highland world of pastoral herders, monasteries and routes crossing the Qaidam. Salt was gathered from its crust and carried by pack animals toward settlements and grazing grounds. The mineral was essential for preserving food and feeding livestock, giving the lake a value that did not depend on abundant farmland or timber. Seasonal labour and transport joined the salt flats to the wider Tibetan and Mongol economy.

Settlement beside the lake served the extraction work through a landscape of extreme cold, dry air and short growing seasons. The lake remained a natural storehouse whose value depended on water balance and an accessible crust. Its position near the eastern Qaidam made it a stopping place between the high basin and the routes toward Xining.