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一、矿区地質概況 本矿区位于胶辽地盾复县复向斜北翼(半稳定地块北翼),附近地层为大石桥統白云質石灰岩及盖平統片岩类;震旦紀石英岩成斜交不整合被伏其上;中生代斑状花岗岩成楕圓形穿过上述不同时代之地层,前震旦紀地层在矿区北部靠近花崗岩区成半穹窿构造,岩层傾斜20—40°,片岩区为向斜构造,南部为反转背斜(图1)。
I. Geological Survey of the Mining Area The mining area is located in the north wing of the syncline in the Duanfu County (northern part of the semi-stable block) in the Jiaodiao area. The nearby strata are the Dashiqiao white dolomitic limestone and the Gapping schistoliths. Sinian quartzite is inclined The unconformity is covered by volcanic rocks. The Mesozoic plagioclase granite goes through the above strata of different ages in a circular pattern. The former Sinian strata are formed in the northern part of the ore area near the granite area into a semi-dome structure with a slope of 20-40 °. The schist is a syncline Constructed in the south are anticlinal anticlines (Figure 1).