Abstract:

The preliminary study of the lead-zinc exploration prospect in the Zhanzanmubu area, Xaitongmoin, Tibet is based on regional geology, surveys of stream sediments, and soil and high-precision magnetic measurements. The exposed stratum is mainly crystal tuff and andesite porphyrite of Tertiary Eocene Nianbo Formation. Exposed magmatic rocks are mainly Tertiary Eocene monzonitic granite and small area of granite-porphyry. Diagrams showing the elemental anomalies based on the stream sediment survey in the Zhanzanmubu area have disclosed that there are remarkable element anomalies of various scales, such as Pb, Zn, Ag, Au, Sb, Cu, Ba, Hg, Sn and As, especially those of Pb and Zn are relatively large. The soil profile in the Zhanzanmubu area shows that anomalies of Pb, Zn and Ag are more significant. The magnetic survey indicates that the anomalies of geochemical survey are nearby the magnetic anomalies.By qualitative analysis of magnetic anomalies, it is inferred that there are favorable for deep exploration prediction of these metal deposits.Magnetic anomalies indicate that it is favorable location for hydrothermal mineralization. By the combination relationship between elements from soil survey data,it is inferred that Pb，Zn and Ag，As，Sb，Cu are of the close. Combined with geochemical anomalies and geological characteristics, the leadzinc deposits in the Zhanzanmubu area may be of volcanic rock type associated with lead-zinc polymetallic ore deposits. It follows that the study area is expected to be a prospective area for the lead-zinc （silver） polymetallic ore deposits related with  volcanic rocks in the Zhanzanmubu area.

Key words: Xaitongmoin；Zhanzanmubu；lead-zinc （silver） polymetallic ore deposit；exploration prospect, Tibet