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本文从大容山岩带产出的区域地质背景、岩带与海西地槽褶皱带的同构造特征、与围岩的接触关系及同位素年龄等方面论证了岩带的时代为海西期。根据岩石特征确定其成因是重熔岩浆结晶形成;结晶作用发生的物理化学条件:T=650°-710°c,P=4.01kb,fo_210~(-16)-10~(-17)大气压。从岩浆演化趋势出发,结合地质特征,将岩带分为两个亚带:南东亚带和北西亚带:
This paper argues that the age of the rock belt is the Hercynian from the regional geological background of the Dahongshan belt, the syn-tectonic features of the belt and the Hercynian fold belt, the contact with the surrounding rock and the isotopic age. According to the characteristics of rocks, the formation of recrystallized magma crystals is confirmed. The physicochemical conditions of crystallization are T = 650 ° -710 ° c, P = 4.01kb and fo_210 ~ (-16) -10 ~ (-17) atm. Based on the magmatic evolution trend and combining with the geological characteristics, the rock belt is divided into two subbands: South East Asia and North West Asia: