Modern sedimentary system and windfield-source-basin system dynamics of qinghai lake

Abstract

The modern sedimentary system of the Qinghai Lake is the product of the comprehensive effects of the “windfield-source-basin” system. The Piedmont region of the east lake sand area and Langma Shegang sand area belongs to wind-controlled system. The river catchment areas belong to source-controlled system. The semi-deep and deep lake area and the travertine developing area belong to the basin-controlled system. Eolian sand dunes in front of Tuanbao–Daban Mountain, on the Buha River delta plain, and in the Langma Shegang sand area are dominated by wind. Alluvial fan, river, fan delta, and delta in the Qinghai Lake area belong to source-basin system. Barrier coast (barrier island and trumpet-like estuary), lake beach, and littoral deposition belong to windfield-source-basin system. The depositional systems on the east coast and west coast are significantly different from each other.