Abstract: The analysis on the ore-forming contents of Xiongcun porphyry copper deposits in Tibet showed that Gold content are relatively high.The copper ores exhibit Cu/Au atomic ratios much smaller than 25 000，Au/Mo atomic ratios greater than 30，which signify them as gold-rich porphyry copper deposits.There is a close correlation between Au，Cu and Ag in Xiongcun porphyry Cu-Au deposits，but poor correlation between Au and Mo.The ore-body is widespread in the phyllic and siliconization alterations zone，and Au and Ag mainly occur in chalcopyrite.Xiongcun porphyry mineralization is generally low in depth，and gold-rich porphyry copper deposits tend to be emplaced at levels of 0.4~1.5 km.Mo in Xiongcun copper（gold) deposit mainly occur in molybdenite and more concentrated in the edge of the ore body with a lower content of only one-tenth of Qulong porphyry copper deposit.Xiongcun porphyry deposits are formed in an environment of island arc or similar island arc.

Key words: Porphyry copper, Xiongcun, Element ratios, Ore-forming temperature, Depth of mineralization