摘要
大地构造控制了含矿建造的分布,区域地质构造的不同发展阶段发育了不同的含矿建造类型,不同的含矿建造孕育了不同的矿床成因类型。“两隆夹一陷”的构造格局、晚二叠世玄武岩沿断袭的喷溢,是区内构造热卤水驱动和运移、基底铅锌物质活化的重要条件。基底复活断裂、倒转背斜加“一刀”(断层)、长寿断裂加次级褶皱是区内的重要控矿构造型式。容矿构造不管是断裂或层间破碎带,当它与导矿构造(如基底复活断裂、深断裂)毗邻时,是区内大、中型矿床的重要构造成矿条件。
In the eastern margin of Kangdian Axis, distribution of ore formations are controlled by regional tectonics, Given stages of tectonism are characterized by specific types of ore formateions while differential genetic types of ore deposits are confined to the differential ore formations, The tectonic framework, in association of two uplifts with one depression and the effusion of basaltic magma along fractures in the Late Permian were of great im-portance to the mobilization of Pb and Zn from the basement rocks and to the migration of the ore brine, Basement renewed faults and association of reversed anticline with a fault as well as association of long-lived fault with subsidiary fold are important ore control struc-tural patterns. Host structures such as fracture and interlayer rupture zone in association with structures as passage way for ore fluid such as basement renewed fracture and deep fault would play an important role in the ore-formation of large- and medium-scale pb-Zn deposits in this region.
出处
《四川地质学报》
1993年第1期20-27,共8页
Acta Geologica Sichuan
关键词
构造型式
断裂控矿
成矿模式
stractural pattern, ore control fracture, metallogenetic model
