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在地质作用不同阶段中,金的赋存状态也不同。其变化规律决定于金本身的地球化学性质,因此讨论其赋存状态时必须从金的地球化学性质入手。本文试图阐明金的赋存形式,形成机理及其研究方法。一、金的主要地球化学特征金的原子序数79,属第六周期I_B族元素(Cu、Ag、Au)。原子结构5S~2 5P~6 5d~(10)6s~1,是镧系之后的过渡元素,原子的电子充填方式为内层充填,表现亲Fe(Pt)性和亲Cu(S)性。充填方式也决定了金的主要地球化学参数—电离势、(9.22电子伏特)、负电性(2.3)、氧化—还原电位(Au~++e=An+1.68V,Au~(3+)+3e=Au+1.42V)—“三高”的特点,因而金的化学性质显惰性,常呈自然金出现。
In different stages of geological processes, the state of gold is also different. The law of its change is determined by the geochemical properties of gold itself. Therefore, it is necessary to start with the geochemical properties of gold when discussing its occurrence. This paper attempts to elucidate the existential form of gold, its formation mechanism and its research methods. First, the main geochemical characteristics of gold The gold atomic number 79, is the sixth cycle I_B elements (Cu, Ag, Au). Atomic structure 5S ~ 2 5P ~ 6 5d ~ (10) 6s ~ 1 is the transition element after lanthanide. The electron filling mode of the atoms is the inner layer filling, which shows pro-Pt and Cu (S) affinity. The filling method also determines the main geochemical parameters of gold - ionization potential, (9.22 electron volts), negative charge (2.3), oxidation-reduction potential (Au ~ + + e = An + 1.68V, Au ~ (3 +) + 3e = Au + 1.42V) - “three high” characteristics, so the chemical properties of gold was inert, often showed the emergence of natural gold.