论中国最主要脉状金矿床的成因

GENESIS OF THE MOST IMPORTANT GOLD LODES IN CHINA

胶东(A)、辽南丹东(B)、吉林桦甸(C)、冀东(D)和小秦岭(E)等五个金矿集中区,是中国最主要的脉状金矿床产区,已探明的金矿储量约占中国已知内生金矿床储量的40％。脉状金矿床的地质和同位素地质标型特征,说明它属中深岩浆热液成因。与脉状金矿床有时间、空间静成因关联的花岗岩类不是成矿“母岩”,而是成矿同源岩。脉状金矿床形成过程中有少量围岩的矿质铅、硫的加入,介质水中有天水渗合,但它们的真正意义尚不清楚。

China is one of main producers of gold in the world. The most important gold lodes concentrate in five gold provinces. They are. 'Jiaodong in Shandong (A), Dandong in South Liaoning (B), Huadian in' Jilin (C) East Hebci (D) and Xiaoqinling(E)in Shanxi. The verified gold reserves in these areas make up about 40% of total gold reserve in China.The geology of the gold lodes such as the magnitude mode of occurrence, lode and dike alternation spatial and temporal evolution, mineralogy,rsize and occurence of gold grains, polystage alteration of country rock, depth of mineralization and geochemistry, isotopic age, chayacteristics of stabe isotopes of Pb, S, D-O, etc. shows that the most important gold lodes in China are intermediate to deep magmalic-hydrothermal origin.But. during the process of mineralization, the gold was mixed with mixed lead.Sulphur and meteoritic water, whose real importance is unknown. Granitic rocks sliyhtly older than gold mineralization controled the distribution of ore body and were formed from the same magma reservoir as the ore-bearing solutions.Granitic rocks are cognate with gold-ores, and not the 'mother-rocks'of the latter as usually proposed.The classic magmatic hydrothermal tnetallogenic theory has to be revised.