Abstract: The Baiyangping silver polymetallic deposit as a newly discovered deposit in the Lanping Basin, western Yunnan is assigned to part of the eastern Tethys-Himalayas metallogenic domain, and hosted in the quartz sandstone and siltstone of the Lower Cretaceous Jingxing Formation. The comparison of the geochemical signatures of the trace elements from the above-mentioned ore deposit and other Himalayan alkaline rock masses in western Yunnan shows a similar provenance of the ore-forming material, i.e. the mixed crust-mantled "EM-Ⅱ" type enriched mantle origin.