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通过吕凤矿区构造特征分析,探讨该区构造演化过程,即印支期主要形成吕凤-赖源复式向斜(本区出露复式向斜南东翼)和F3、F1、F4正断层以及F0、F0-1等2条滑覆断层;燕山早期形成边界F6正断层和边界外围F7逆断层,并沉积了大面积上侏罗统南园组(J3n)火山沉积岩;燕山晚期形成上侏罗统南园组(J3n)地层以角度不整合覆盖在上二叠统翠屏山组(P2cp)和下二叠统童子岩组(P1t)之上。在这些过程中,区内构造进一步复杂化。
The tectonic evolution of this area is discussed through the tectonic characteristics analysis of Lvfeng mining area, that is, the Indosinian mainly forms Lvfeng - Laiyuan multi-syncline (the southern and southern wings of the compound syncline in this area) and F3, F1 and F4 normal faults F0 and F0-1. Early Yanshan boundary F6 normal fault and F7 reverse fault were formed and a large area of J3n volcanic sedimentary rocks of Upper Jurassic was deposited. Late Jurassic Nanyuan Formation (J3n) strata are angularly unconformable over the Upper Permian Cuiupingshan Formation (P2cp) and the Lower Permian Tongziyan Formation (P1t). In these processes, the structure of the area is further complicated.