芨岭岩体北部地区革命沟断裂地电结构特征

Geoelectrical characteristics of Geminggou fracture in northern Jiling rock mass

通过对芨岭岩体北部地区G01与G02线AMT资料反演得出的电性结构模型进行研究,结合区内地质情况以及89号勘探线地质剖面资料,基本厘清了革命沟断裂上下盘的地电结构特征,推断了该断裂的位置、产状以及深部延伸情况等信息。研究结果表明,AMT成果能客观地反映剖面地下半空间地质体的电性分布规律,揭示了控矿构造:革命沟断裂的上盘反映为向深部延伸的舌状低阻破碎带,而紧靠断裂下盘发育的硅质大理岩、角砾岩则反映为上窄下宽的楔形高阻体,严格控制了含矿硅质大理岩、角砾岩的走向及其分布形态。

Through the electrical structure model of AMT inversion for G01 and G02 line in northern Jiling rock mass,combined with regional geology and geological profile data of No. 89 prospecting line,the authors basically clarified the electrical structural features of the hanging and lower walls of Geminggou fracture,and then inferred its location,attitude,deep extension and some other information.The results show that AMT can objectively reflect the electrical distribution pattern of geological body in the underground half-space of the section,and it can also reveal the structural features of ore-controlling structure,i. e.,the Geminggou fracture. The hanging wall is reflected as tongue-like low resistance band that extends to the depth,while the siliceous marble and breccias developed close to the lower might reflect a wedge-shaped high resistance body that is narrow at the top and wide at the bottom,This can strictly control the strike and distribution pattern of ore-bearing siliceous marble and breccia.