The Cuonadong Dome is located in the eastern part of the Tethyan Himalaya, within which a Be-W-Sn deposit, accompanied by a variety of rare elements, has been found. On the basis of field investigation and whole-rock geochemical characteristics, the authors discuss the elemental enrichment rules of Au, Ag, Cu, Pb, Zn, W, Sn, Li, Be, As, Sb and U in the dome, by means of geochemical clustering analysis, factor analysis and other methods, combined with the structural characteristics of the dome. Analytical results show that the dome system itself provides sufficient material sources for the enrichment of Sn, As, Be, Li, Pb and W. The dome controls the enrichment of various elements differently. The core mainly controls W, Sn ,Be and Pb. The slip system mainly controls W, Sn and Be. The capping layer mainly controls Pb, Cu, Zn, Ag and Pb elements, and the dome presents the distribution rule of high temperature (W-Sn-Se) -medium temperature (Cu-Pb-Zn) -medium low temperature (Sb-Ag) from the inner part outwards on the whole. The W-Sn-Be elements are highly enriched and large in scale, and are found to be related to pale granite and pegmatite, skarn marble as well as failure of the decollement tectonic-shear caprock.
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