摘要
丁家林—太阳坪金矿带与丁家林—太阳坪脆 韧性剪切带同位分布、同能源作用、同步生成,是脆 韧性剪切变形形成的石英脉型金矿,总体走向NE,主要由丁家林和太阳坪2个金矿床组成,分石英单脉、单脉密集带、复脉带3个亚型。丁家林以含Au石英复脉为主,太阳坪以含Au石英单脉为主;成矿物质来源于富含Si质的志留系黄坪组,成矿流体主要是构造水;内生成矿作用分脆 韧性剪切变形—构造分异热液期和韧 脆性剪切变形—构造分异热液期,与2期脆 韧性剪切变形相对应,第2期为主成矿期。其成矿机理是脆 韧性剪切变形动力成岩成矿。
The Dingjialin to Taiyangping gold area belongs to the quartz-vein type gold deposit formed by the brittle-ductile shearing deformation, and has the same location, energy movement and synchronous formation with the Dingjialin to Taiyangping brittle-ductile shearing belt. Its strike is NE and the Dingjialin and Taiyangping are the main gold deposit. It can be classified to 3 subtypes: the individual quartz veins, the individual quartz concentrated belt and the complex quartz vein belt. The Dingjialin deposit is dominated by the auriferous complex quartz veins and the Taiyangping deposit is dominated by the auriferous individual quartz veins. Ore-forming materials come from the Si-rich Huangping group of Silurian system, and the ore-forming fluids are mainly the tectonic waters. The endogenic mineralization can be classified to 2 stages: the brittle-ductile shearing deformation and structural differential hydrothermal stage and the ductile-brittle shearing deformation and structural differential hydrothermal stage,which corresponding to the 2 brittle-ductile shearing deformation stages, the second stage is the main stage of the mineralization. The mineralization mechanism is that the brittle-ductile shearing deformation dynamically resulted in diagenesis and mineralization.
出处
《黄金地质》
2003年第4期8-12,共5页
Gold Geology
关键词
金矿
成矿机理
脆-韧性剪切变形
动力成岩成矿
陕西
四川
gold deposit
brittle-ductile shearing deformation
dynamically resulted in diagenesis and mineralization
Shaanxi
Sichuan
