四川里伍铜矿田控矿构造特征与找矿方向  

Ore-controling structures and ore prospecting in the Liwu copper orefield in western Sichuan

作　　者：邹光富[1] 毛英 李建忠[1] 姚鹏[1] 唐高林[3] 

机构地区：[1]成都地质矿产研究所,四川成都610081 [2]成都岩矿分析测试中心,四川成都610081 [3]四川里伍铜业股份有限公司,四川九龙626200

出　　处：《沉积与特提斯地质》2012年第3期79-86,共8页Sedimentary Geology and Tethyan Geology

基　　金：国土资源部矿产资源补偿费矿产勘查项目四川省九龙县里伍铜矿外围普查资助

摘　　要：里伍铜矿田位于扬子地台西缘江浪变质核杂岩穹隆构造中。现已发现里伍、黑牛洞等中小型铜矿床7处,为扬子地台西缘地区铜矿集中产出区之一。中深构造层次的江浪变质核杂岩构成了矿区构造主体。通过对里伍铜矿田内矿床的地质特征、控矿因素和控矿构造特征等的系统研究表明,矿田中由变质核杂岩穹隆构成的构造组合及其韧性剪切滑脱带控制了铜矿体的定位、形态以及矿床的规模。变质核杂岩穹隆中的韧性剪切滑脱带是主要控矿构造。在综合研究的基础上,提出了矿田和区域找矿方向。Tile Liwu copper orefield is hosted in the domal structures of the Jianglang metamorphic core complexes on the western margin of the Yangtze platform, where seven medium- to small-sized copper deposits such as the Liwu and Heiniudong copper deposits have been delineated up to now. The emplacement, occurrence and sizes of copper orebodies are controlled by the structural associations composed of the metamorphic core complex domes and associated ductile shear-decollement zones on the basis of the integration of geology, ore-controling factors and orecontroling structures in the orefield. The copper deposits commonly occur as vein, lenticular and stratoid deposits filled-replaced along the ductile shear-decollement zones of the metamorphic core complex domes where larger metallogenic and accommodation spaces are favourable for the formation of larger-sized copper deposits. Therefore, the ductile shear-decollement zones of the metamorphic core complex domes are believed to be the main ore- controling structures in the Liwu copper orefield. Future targets for the further prospecting and exploration should be concentrated in the Liwu copper orefield and its surrounding areas similar to the Jianglang metamorphic core complex domes on the western margin of the Yangtze platform.

关 键 词：里伍铜矿田 变质核杂岩穹隆 控矿构造 找矿方向 

分 类 号：P613[天文地球—矿床学]