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一、区域地质概况阿勒太铁矿带位于阿勒太褶皱系富蕴褶皱带之中段,阿勒太——蒙古基底大断裂之西南沿,呈 NW—SE 向线状展布。东南自青河富蕴,西北至哈巴河,东西长420Km,南北宽25Km。本文工作重点在中段阿巴官—蒙库一带。区内褶皱断裂均甚发育,挤压初期形成紧闭褶曲,中期褶皱的块段被 NW 向断裂破坏,分割成若干个断块,晚期各断块经受不同强度的挤压与变质形成不同类型的褶皱与断裂。在变质程度上亦有差异。本区含矿地层以晚古生代泥盆系为主,呈 NW—NWW 向断续地残留在大片以海西期为主(部分燕山期)的花岗岩体中。均已遭受海西地槽回返时发生的褶皱和区域变质作用,以
I. Regional Geological Survey The Ale iron ore belt is located in the middle of the Aleutian fold belt Fuyun fold belt. It is NW-SE linear distribution along the southwest edge of the Aleta-Mongolia basement faults. Southeast Fuyun from the Green River, northwest to Haba River, east-west length 420Km, north-south width 25Km. This article focuses on the middle Aba Guan - Mongolia library area. The folds and faults in the area developed very well. The tight folds were formed in the initial stage of extrusion. The mid-term folded blocks were destroyed by NW faults and divided into several fault blocks. In the late stage, the fault blocks underwent different intensities of compression and metamorphism to form different types of Fold and fracture. There are differences in the degree of deterioration. The ore-bearing strata in this area are dominated by the Late Paleozoic Devonian, and NW-NWW remains discontinuously in large-scale granitic rocks dominated by the Hercynian period (part of Yanshanian period). Have all suffered the folds and regional metamorphism that occurred when the Hercynian Trough returned