Abstract
Fine disseminated gold deposits occurring along the southeastern margin of the Yangtze Plate belong to the epithermal type resulting from different systems of ore-forming fluids. According to their sources, the ore-forming fluids can be divided into four systems: a) meteoric water system; b) oil-brine system; c) basin-brine system; and d) magmatic-formation water system. The four hydrothermal systems are responsible for four types of gold deposits, respectively. The meteoric water system produces hot spring gold deposits. The basin-brines, which are derived from fissure water, structural water and absorbed water sealed up in strata, are responsible for the basin-brine-type deposits. The oil-brine system, having the same source as the basin-brines, is characterized by the involvement of organic matter and is responsible for the oil-brine-type deposits. Inclusion fluid data show that there are obvious differences in chemical composition and carbon, oxygen, hydrogen and sulfur isotopes for these hydrothermal systems. Different metallogenic provinces, in which one of the four systems is dominant, can be recognized in the region.
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This project was jointly granted by the National Natural Science Foundation of China and the “Raising Seedlings” Foundation of the Nanjing University.
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Jingrong, Z., Jianjun, L., Aiping, W. et al. Ore-fluid Systems of fine disseminated gold deposits along the southeastern margin of the Yangtze Plate. Chin. J. of Geochem. 14, 193–202 (1995). https://doi.org/10.1007/BF02842042
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DOI: https://doi.org/10.1007/BF02842042