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胶东郭城地区的金矿床地质特征与胶东其它地区的金矿存在较大的差异,其原因是该区发育了一组NE向深大断裂(可归为郯庐断裂派生的一组次级断裂),成矿期强烈频繁的构造-热事件导致形成了多组相互叠加的控矿构造,这种特殊的构造背景决定了该区矿体在形态、产状和赋存特征方面的特殊性。通过对矿山大量探采工程所揭露的控矿构造的研究发现,矿体定位于郯庐断裂(Ⅰ)的次级断裂带(Ⅱ)所派生出的NEE、NNE及NW向3组更次级结构面(Ⅲ)中。通过研究这3组结构面成生的力学性质和空间组合特性,揭示矿体的定位机制并指出该区下一步的找矿方向。
The geological characteristics of the gold deposits in the Guojiao area of Jiaodong area are quite different from the gold deposits in other areas of the Jiaodong area due to the development of a group of deep NE-trending faults (a group of sub-faults derived from the Tan-Lu fault ). The strong and frequent tectono-thermal events in the mineralization led to the formation of multiple ore-control structures superimposed on each other. This particular tectonic setting determines the particularity of the ore body in morphology, occurrence and occurrence. Based on the study of the ore-controlling structures exposed by a large number of exploration and mining projects in the mine, it is found that the ore bodies are located in the subgroup of NEE, NNE and NW derived from the secondary fault zone (Ⅱ) of the Tan-Lu fault (Ⅰ) Structural plane (Ⅲ). By studying the mechanical properties and spatial combination characteristics of these three groups of structural planes, the orebody localization mechanism is revealed and the prospecting direction of the next step is pointed out.