论文部分内容阅读
本文论述了金的一般地球化学特征,接着简要描述了含金矿床的一般类型及世界金的产量概况。最后以金矿床成因的扼要章节结束本文。后生的脉型、复脉型、网脉型和浸染型金矿床主要是通过变质分泌作用和花岗岩化作用形成的,金及其有关元素的源岩主要赋存于火山岩的和/或沉积岩的堆积体内。现代的砂金矿均属沉积成因,是在风化和后成沉积作用期间,作为化学(增生)和物理(重力)作用过程的结果,金被簸选进入砂矿富集带层中而成。含金石英砾岩型矿床可能起源于砂矿,在后成成岩作用和变质事件期间,金及其许多相关的元素经历了根本的化学再造。
This article discusses the general geochemical characteristics of gold, followed by a brief description of the general types of gold-bearing deposits and the world gold production profile. Finally, the concluding section of the genesis of gold deposits. The epiphytic veins, complex veins, reticular veins and disseminated gold deposits are mainly formed through metamorphism and granulization, and the source rocks of gold and its related elements mainly occur in volcanic rocks and / or sedimentary rocks in vivo. Modern gold and gold deposits are all genesis of sedimentation and are the result of chemical (hyperplastic) and physical (gravitational) processes during weathering and post-sedimentation, with gold being roughened into the sand-rich zone. Au-bearing quartz conglomerate deposits may originate from placer deposits and during the post-diagenetic and metamorphic events, gold and many of its associated elements undergo radical chemical rework.