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甘肃红柳沟一带分布大量的辉长—闪长岩,岩体主要由闪长岩组成,岩石的化学成分特点为SiO2介于47.65%～-51.52,Al2O3含量变化较大,TiO2=0.80%～1.17%,较岛弧拉斑玄武岩高(0.83%Pearce,1982),CaO含量较高为10.11%～0.52%,Mg#较低为32.66～33.23,m/f值0.48～0.50,MF=0.62～0.64,属铁质基性岩类。稀土总量较低,亏损高场强元素Ta、Nb、Hf、Zr、Ti及重稀土为特征。地球化学特征显示与板块俯冲碰撞有关,可能代表了哈萨克斯坦板块与塔里木板块早期俯冲的记录。
A large number of gabbro-diorites are distributed in the area of Hongliugou, Gansu. The rock mass is mainly composed of diorite. The chemical composition of the rock is characterized by SiO2 ranging from 47.65% to -51.52 and Al2O3 content varying largely from 0.80% to 1.17 (0.83% Pearce, 1982), the content of CaO is 10.11% ~ 0.52%, the value of Mg # is 32.66 ~ 33.23, the value of m / f is 0.48 ~ 0.50 and the value of MF is 0.62 ~ 0.64 , Is an iron basic rock. The total amount of rare earth is low, and the depleted high field strength elements Ta, Nb, Hf, Zr, Ti and heavy rare earth are characterized. Geochemical characteristics show correlation with plate subduction and may represent records of early subduction of the Kazakhstan and Tarim plates.