论文部分内容阅读
Kidston矿床位于昆士兰北部,距Townsville NWW向约280km,是当今澳大利亚第2大金矿生产区.矿化主要产于一个面积为1100m×900m的不规则四边形角砾岩筒中,在时空上,角砾岩化和金矿化都与二叠纪—石炭纪大批流纹岩脉有关。它侵入到中元古变质岩和泥盆纪—志留纪花岗岩类主岩中。 角砾岩筒内的角砾化分为3个相,都与岩浆和(或)岩浆热液作用有关。流体包裹体数据表明,在矿化时期现有的剥蚀水平在当时陆地表面以下3500m。缺少任何有意义的大气流体进入到热液系统中的事
The Kidston deposit, located in northern Queensland about 280km from Townsville NWW, is today the second largest gold producer in Australia. Mineralization occurs primarily in an irregular tetragonal breccia barrel of 1,100 m × 900 m. Both lithification and gold mineralization are related to the Permian-Carboniferous rhyolts. It intruded into the Mesoproterozoic metamorphic rocks and the Devonian-Silurian granitic host rocks. The breccia in the breccia barrel is divided into three phases, which are all related to the magmatic and (or) hydrothermal fluids. Fluid inclusion data indicate that the existing level of erosion during the mineralization period was 3500 m below the land surface at the time. Lack of any meaningful atmospheric fluid into the hydrothermal system