加强前寒武纪条带状铁建造中伴生矿床的研究

在世界范围内,前寒武纪条带状铁建造中除产出大量贫铁矿和富铁矿外,常共生和伴生许多金属和非金属矿产,特别是金、锰、铅锌铜和镍以及硫铁矿等矿床,其中不少达到大型和超大型规模,其经济价值超过铁矿床本身,在一些国家的国民经济中占有重要位置。我国前寒武纪鞍山式条带状铁建造除主要产出贫铁矿和少量富铁矿外,少数地区也已发现伴生金矿床。但目前已知多属于中小型矿床,大型金矿床和其他金属矿床迄今为止尚未发现,从综合找矿角度,应重视和加强这些矿床的研究和进一步寻找,一旦有新发现,一矿变多矿,在找矿中必将有重大突破。本文主要介绍国内外目前对这些矿床的研究现状和基本地质特征,为目前我国的找矿工作提供借鉴,扩大找矿思路。

On the strengthening of the research on Au, Mn, Pb-Zn, Cu and Ni ore deposits associated with Precambrian banded iron formation

In the world, besides a number of high-grade or low-grade iron ore deposits in the Precambrian banded iron formation, there exist numerous associated deposits which contain large quantities of metallic and nonmetallic resources, particularly Au, Mn, Pb-Zn, Cu and Ni. These deposits are large to super-large in size, and some of them possess an important position in national economy of some countries. However, in China, only several small-medium sized Au deposits have been discovered, whereas large-sized Au deposits and other metallic ore deposits have not yet been found. Therefore, during the geological survey and integrated prospecting, researches on polymetallic deposits associated with the banded iron-formation must be strengthened. The geological characteristics and background of Precambrian greenstone belt and banded iron formation must be studied. Moreover, synthetic thought must be formed in looking for these mineral deposits which have favorable ore-prospecting potential. This paper deals with the research situation and basic geological characteristics of several typical ore deposits in China and abroad in the hope of providing some reference and expanding train of thought for China''s prospecting work.