摘要
对新疆东准噶尔哈尔里克构造带上双峰山金矿床的地质特征、矿床蚀变分带进行了初步研究 ,表明潜火山热液与火山热泉参与了成矿。这两个成矿阶段同源同位的蚀变矿物晕 (带 )叠套 ,造成双峰山矿床蚀变分带从上至下为隐爆硅质角砾岩化带、低金品位硅质岩带、石英 (冰长石 )网脉带 (矿体 )、黄铁矿蒙脱石化带和青磐岩化带。该矿床的成矿流体与晚古生代造山初期深成流纹质熔浆的陆相喷发有关。火山热泉循环形成蚀变晕 ,此阶段有大气降水的参与 ;潜火山热液成矿阶段发育的低温微细石英网脉中含冰长石和绢云母。双峰山矿床是晚古生代火山地区典型的冰长石_绢云母型浅成低温热液金矿床。
The Shuangfengshan gold deposit is located along Haerlik tectonic zone in easter n Junggar, Xinjiang. From the beginning of the eruption of shallow_sea basalt_an desite to the spraying of continental flowing magmatic melt in early Carbonifero us, the volcanic hot spring formed the center of low grade gold_bearing silica r ock along the altered mineralization zone of the NW_NWW shallow pipe. Subvolcani c hydrothermal solution formed micro_crystalline quartz (adular) in the cracks o f silica, and then formed ores. These two ore_forming stages have the same sourc e and place, forming the superimposed mineralization_alteration zone. The minera lization_alteration in Shuangfengshan appears in downward succession of silica b reccia zone, low grade gold_bearing silica rock zone, quartz (adular) stockwork zone (orebody), pyrite montmorillonite zone and propylitic alteration zone. Lead and sulfur isotope and REE studies show that the metallogenic solution is relat ed to the continental magmatic melt sprayed at the beginning of late Paleozoic ( early Carboniferous) arc mountain activity. The circulation of volcanic hot spri ng formed the alteration zone which, together with atmospheric water and subvolc anic hydrothermal solution, formed micro_crystalline quartz that contained adula r and sericite. The deposit is an adular_ and sericite_bearing epitheral gold de posit formed in late Paleozoic volcanic area.
出处
《矿床地质》
CAS
CSCD
北大核心
2004年第1期101-106,共6页
Mineral Deposits
基金
"九五"国家科技攻关 30 5项目 96_91 5_0 5_0 3专题的部分研究成果
关键词
金矿床
火山热泉
潜火山热液
蚀变矿物晕
成矿模型
矿床地质
geology, volcanic hot spring, subvolcanic hydrother mal solution, altered mineralization zone, mineralization model, Shuangfengshan, Xinjing
