论文部分内容阅读
产于达拉德变质带黑云母带中变质期后石英脉由三种主要类型组成:含黄铁矿的他形石英型,含赤铁矿的他形石英型和含赤铁矿或金红石的柱状石英型。他形石英脉中的氧化矿物由先存硫化物氧化而成,金在此氧化过程中被活化。成分相似的晚期柱状结构石英晶体经历了相分离的流体形成。脉中石英的氧同位素比值不等。成矿流体含有大量大气降水的成分,其同位素组成和化学成分随着水-岩相互作用而逐渐变化。金的活化转移与再沉积在片岩地层中随着氧化作用前锋通过移动而逐渐发展。金矿床的成因在空间上不固定,且不断交换。文中提出了大气降水渗入和氧前锋是形成区域金活动性的新假说。
The quartz veins, which originate in the biotite zone of the Dallar metamorphic belt after metamorphism, are composed of three major types: Heterotype pyrite with pyrite, Heterotype quartz with hematite and Hematite with hematite or rutile Columnar quartz type. The oxide minerals in his quartz veins are oxidized by pre-existing sulfides, which are activated during this oxidation. Lateral columnar structural quartz crystals of similar composition undergo phase-separated fluid formation. Oxygen isotope ratios of quartz in the veins vary. The ore-forming fluid contains a large amount of components of atmospheric precipitation, and its isotopic composition and chemical composition gradually change with water-rock interaction. Activation and redeposition of gold in the schist formations progressively evolve with oxidation as the striker moves. The causes of gold deposits are not fixed in space and are continuously exchanged. In this paper, we propose a new hypothesis that atmospheric precipitation infiltration and oxygen striker are the gold mobility in the region.