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This paper deals with a preliminary study of 13 localities of Precambrian iron-formations in the Jiamusi median massif and determination of the gold eontent of 391 samples. It has been ascertained that the gold deposits are strictly controlled by the iron-formations and exhibit obvious stratabound features. On that basis, the paper principally discusses gold migration and enrichment. Abundant Mn and Co are contained in primary sediments of the Dongfengshan-type gold deposits, which strongly supports and supplements the idea that the gold deposits of the same kind in the world are of metamorphosed volcanoexhalative-sedimentary origin.
This paper deals with a preliminary study of 13 localities of Precambrian iron-formations in the Jiamusi median massif and determination of the gold eontent of 391 samples. It has been ascertained that the gold deposits are strictly controlled by the iron-formations and exhibit obvious stratabound features. On that basis, the paper principally discusses gold migration and enrichment. Abundant Mn and Co are contained in primary sediments of the Dongfengshan-type gold deposits, which strongly supports and supplements the idea that the gold deposits of the same kind in the world are of metamorphosed volcanoexhalative-sedimentary origin.