Thinlayered granite residual weathering crusts covered by high mountain sparse bush and meadow

in the subnival lake area belong to the aluminosiliceous weakly acid-acid leaching type, with the

leaching of Na2O, CaO K2O, SiO2 in different degrees. Most weathered parent rocks have relatively high

trace elements such as B, Bi, Zn, Nb, La, Be, Sr, F and Ag.  Al2O3 is basically stable, and TFe, MgO, TiO2,

P2O5 and TMn have been somewhat accumulated. There are also high contents of Sn, Mo and Zr and low contents

of Hg, Cu, Ni, Co and Li in parent rocks.