摘 要: | <正>The garnet–bearing mica–quartz schist of the Sumdo high pressure metamorphic beltfrom the Lhasa block is mainly composed of garnet,muscovite,albite,quartz and minor chlorite,rutile and sphene.Garnet displays obvious zonation where Xpy=Mg/(Mg+Fe+Mn+Ca)]increases from the core to the mantle,and then decreases in the rim;
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