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下拉地铅锌成矿带是在晚古生代伸展构造体制背景下的产物,构造对成矿的控制作用主要表现为裂陷期同生断裂对成岩成矿的控制上,根据时间承接关系和不同时段构造控矿侧重点不同,可将伸展环境下构造控矿分为3阶段:即构造—含矿地层沉积、构造—基性火山活动及矿化、构造—次火山作用与成矿;在伸展体制下完成成矿后,随即构造体制向挤压环境转换,此时的构造控矿特征主要表现为中—小尺度的紧闭褶皱和压性逆断层对矿体空间产出的控制上。
The Pb-Zn metallogenic belt is a product of the Late Paleozoic extensional tectonics. The controlling effect of tectonism on metallogenesis is mainly controlled by the synsesis fractures on diagenesis and mineralization during the rifting period. According to the relationship of time undertaking and different periods There are three main stages of tectonically controlled ore-forming in extensional environment: tectonic-ore-bearing strata deposition, tectonic-basic volcanic activity and mineralization, tectono-subvolcanic activity and mineralization. In the extension system After the completion of metallogenesis, the tectonic regime was transformed to compressive environment immediately. At this time, the tectono-ore-controlling features mainly manifested as the control of tight-folded and compressive reverse faults on the spatial output of ore bodies.