华南花岗岩暗色微粒包体的地质特征及来源探讨

Field investigation on mafic enclaves in the granites of South China reveals that most enclaves are heterogeneous with variable composition from their center to edge. Enclaves with different composition exist in the same granite body or even in the same out crop. Xenoliths and mafic enclaves are commonly distributed on the top or border area of a granite body. According to the geological characteristics of enclaves and their distribution in host rock, the author consider that mafic enclaves should be the resitite generated from partial melting of rock blocks and those rock-blocks should come from the covering rock-strata during crustal melting.