永和磷矿沉积环境与成矿机理

来源期刊：中南大学学报(自然科学版)1999年第4期

论文作者：张祖圻 游国君

文章页码：32 - 36

关键词：沉积环境;成矿机理;磷矿;永和;浏阳;湖南

Key words：sedimentary environment; minerogenetic mechanism; phosphorite ore; Yunhe; Luiyang; Hunan

摘    要：研究表明，永和磷矿的主矿层是华南形 成最早的沉积磷矿床，并且是唯一已知的湘锰(大圹坡)期工业磷块岩矿床．磷质主要来自南华洋前湘锰期的海底火山活动，上升洋流是磷质运移的主要营力．根据 本区独有的2个冰海———含磷建造的旋回组合特征，提出了“冰期磷质储集库”的新解说，揭示了“大冰期成磷说”的内涵机理．

Abstract: Based on the geological record of two perfect cyclic assemblages formed by Sinian glaciomarine-phorphate-bearing sedimetary suit in Yunhe, it is possible to depict the systematic minerogenetic process including pre-ice age massive seafloor volcanic eruptions which have provided rich phorphoric source―the cease of oceanic current has advanced reservoir of phorphoric material during the Changan and Hatu ice-ages―the phorphoric materials have been transmitted by upwelling oceanic current to the shallow platform and had been condensed into ore deposites in the post-ice Xiangmen and Doushantuo ages respectively.