黔西南二叠纪陆缘拉分盆地构造岩相学与锑金多矿种成矿  

Tectonics-lithofacies and mineralization of Sb-Au mineral deposits in the Southwest Guizhou apart-pull basin on the margin of Yangtze massif

作　　者：方维萱 

机构地区：[1]中色地科矿产勘查股份有限公司,北京100012 [2]昆明中色地科矿产勘查有限责任公司,昆明650224

出　　处：《矿产勘查》2011年第6期647-660,共14页Mineral Exploration

基　　金：科技部"危机矿山元素综合查定和可利用性评价技术(编号:2008EG115074;2009EG115074)";中色地科(编号:ZSDK-2005-03);昆明中色地科研发项目(编号:KZSDK-2007-3)联合资助

摘　　要：文章认为滇黔桂陆表海域属于多重构造体制转换区,形成了系列的转换盆地、造山带—沉积盆地—岛弧带耦合与转换格局。黔西南二叠纪陆缘拉分盆地,发育在扬子地块被动大陆边缘上。二级沉积盆地受北东向和北西向同生断裂带控制,属于典型拉分盆地。其中,三级热水沉积盆地受同生断裂带交汇部位拉分断陷和复合式古潜山控制;同生断裂拉分断陷形成了三级台沟热水沉积盆地,控制了锰成矿带;在晴隆地区,火山岩各类相体发育齐全,由于火山机构附近火山物质不断堆积增高,并与古水上隆起一起阻隔水体流通,形成了三级海湾盆地(堰塞湖),为火山热水淋滤玄武岩中成矿物质,形成含矿热液提供了基础条件。二级沉积盆地、三级台沟热水沉积盆地和海湾盆地可能是控制多矿种共伴生富集成矿的矿田构造岩相学条件,金、锑、汞、铊、锰、铜、雄黄、萤石、硫铁矿和煤炭资源等富集成矿集中区位于三级沉积盆地之中。The author believes that epicontinental sea in Yunnan, Guizhou and Guangxi province belongs to a multiple tectonic regime convert area,and formed a series of coupled and conversion pattern of conversion basins and orogenic belts - sedimentation ba- sin - island arc belt. Permian continental margin of southwest Guizhou pull - apart basin, developed in the passive continental margin on the Yangtze block. Second level sedimentary basins are controlled by NE and NW trend synsedimentary fault belts, which is a typi- cal pull - apart basin. Among them, the third level hydrothermal depositional basins are controlled by pull - apart fault and composite ancient hidden hill; the manganese ore belt is controlled by the third level ditch hydrothermal depositional basins,which is formed in the results of pulled apart of syngenetic faults . In Qinglong area, volcanic rocks developed all kinds of body development phase, the water flow blocked by the increasement of volcanic material together with the ancient uplifts formed a gulf basin （ barrier lake）, which provide basic conditions that the volcanic volcanic hydrothermal filtered ore - forming materials from basalt and provided ore - bearing hydrothermal. Second level sedimentary basins, third level ditch hydrothermal depositional basins and the Gulf basins may control ore minerals of the ore field. Gold, antimony, mercury, thallium, manganese, copper, realgar, fluorite, pyrite - rich ore and coal re- sources ocuur in the third level sedimentary basins.

关 键 词：转换盆地 构造体系转换 构造-岩相学 拉分盆地 三级盆地 多矿种 

分 类 号：P618.66[天文地球—矿床学] P618.51[天文地球—地质学]