lower mantle
2.The lateral heterogeneity is mainly found in the upper mantle, while the lower mantle and the outer core of liquid state seem to be relatively homogeneous. The core mantle boundary (CMB) transition zone (D″), however, is most likely a heterogeneous chemical boundary layer embedded in a thermal boundary layer, with a temperature drop of several hundred degrees, where its topographic undulation and lateral heterogeneity will affect the spherical symmetry of the Earth model.
7.but South Qinling(SQL),with mean temperature 642℃ and highest temperature 826℃ for Moho boundary,has obvious features with H-model of "hot" geothermal,thinned lithosphere and intensive rheological behavior within moderate-lower crust and top of upper mantle.
10.Therefore, the Neoproterozoic granitoids in Wulian have most probably been generated by partial melting of Archaean TTG gneisses (major tonalitic component thereinto) at pressures of about 0.8?Gpa (i.e. within the middle or the lower crust), and the addition of different proportions of mantle-derived juvenile materials.

