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淡色花岗岩具有相对窄的SiO2变化范围(70.5%～75.5%),且相同SiO2时淡色花岗岩具有相对高的Al2O3(>13.5%)含量和相对低的TFeO+MgO含量(<2.5%).这些岩石化学特征反映了淡色花岗岩较普通花岗岩具有较低的熔融温度和较少分离结晶作用影响.据此,提出有效区别淡色花岗岩与普通花岗岩的Al2O3-SiO2和TFeO+MgO-SiO2判别图.本文报道了蚌埠地区荆山-涂山-蚂蚁山侏罗纪花岗岩侵入体的主要元素组成,并通过对比其与高喜马拉雅淡色花岗岩的矿物学和岩石化学特征,判定蚌埠荆山-涂山-蚂蚁山岩体为一淡色花岗岩带.蚌埠淡色花岗岩的Mg#值较低,与高喜马拉雅淡色花岗岩类似,指示其源区为华南俯冲陆壳在地壳深度、低温脱水熔融的成因.
Pale grained granites have a relatively narrow range of SiO2 (70.5% to 75.5%) and relatively light Al2O3 (> 13.5%) and relatively low TFeO + MgO (<2.5%) for the same SiO2, The chemical characteristics of pastel granite reflect the lower melting temperature and less segregation crystallization of ordinary granite.Accordingly, the distinguishing maps of Al2O3-SiO2 and TFeO + MgO-SiO2, which distinguish effectively pale granite from ordinary granite, are proposed. The major elements of the Jurassic granite intrusions in Jingshan-Tuoshan-Ant Mountain in Bengbu area are compared. By comparing the mineralogical and petrochemical characteristics with Jurassic granite intrusive in the high Himalayan granite, it is concluded that the Jingshan-Tuoshan- Is a light-colored granite belt.The lower BktLu granite has a lower Mg # value, which is similar to the high-Himalayan light-colored granite, indicating that its source region is the cause of the South China subducted continental crust dewatered and melted at the depth and the low temperature of the crust.