【摘要】 黔西南中部卡林型金矿矿集区,以普遍发育逆冲推覆构造为主要特征。在各金矿区内逆冲推覆构造的表现形式不尽相同,但均为重要的控矿构造。重力异常资料表明,金矿的发育与基底隆起关系密切。本文以几个典型金矿区及具有成矿远景的逆冲推覆构造为例,结合地震勘探资料及地表资料进行研究,结果表明:逆冲推覆构造带在黔西南中部广泛分布,分别有走向北西和走向北东两组逆冲断层,是研究区内构造变形复杂的重要原因;研究区逆冲推覆构造带以茅口组顶古岩溶不整合为滑脱面,形成叠瓦扇、反冲、对冲及构造三角带等逆冲推覆构造组合,并控制褶皱作用的发生;在隐伏矿预测中,运用地震勘探方法能够弄清深部构造特征,并结合地表构造地质资料,确定有利成矿部位,为找矿勘探提供可靠依据。更多还原

【Abstract】 Kalin type gold deposits concentrating area tectonically is charactierized by thrust-nappe tectonics in middle depression of the southwestern Guizhou.Thrust nappe structrues are essential ore-control structurals in spite of different styles in Au deposits.Bouguer gravity anomaly showed that, Au deposits were closely related with basement uplift.In this papper, takeing several typically gold deposits’ and mineralizing prospect areas’ thrust nappe structrues for example, analysis the features of the thrust nappe structures and their role in Au minerlization by study seismic interpretation of deep tectonics with ground outcrops tectonics. Thrust nappe structures with two strikes of reversed faults are spread over middle depression of the southwestern Guizhou were the chief reason of tectonic deformation. Thrust nappe structures have several combinations such as imbricate fan, back thrust, ramp thrust and tectonic triangle zone with palaeokarst interface on top of Maokou formation limestone as the detachment. In addition, they always lead folding.Provide reliable evidence for concealed ore orientation prognosis by studying deep and ground tectonics features by seismic interpretation and outcrops.更多还原