磷块岩物理富集成矿的商榷

Discussion on the theory of physical enrichment and ore-forming of phosphorite

20世纪50年代初,萨尔文和维塞提出:磷块岩形成的地点不是现在的位置,而是通过机械搬运堆积到现在的地域,认为磷块岩有一个“生成区”和一个“堆积区”。30年后,叶连俊、陈其英等认为磷块岩多具内碎屑结构,磷质的富集是潮汐流和风暴流对矿源层或矿胎反复冲刷物理富集的直接产物,创立了“工业磷块岩物理富集成矿说”。近三十年来,“磷块岩微生物成矿论”与“磷块岩物理富集成矿说”同步发展,认为富矿(P_(2)O_(5)≥30%)是微生物建造的,而非物理富集的产物。物理富集成矿理论没有现代磷块岩物理富集成矿资料的支撑,主要借鉴碳酸盐岩内碎屑研究成果,碳酸盐岩颗粒是多种作用形成的,不全部是内碎屑,许多现代碳酸盐岩多由生物碎屑直接堆积而成。我们对上扬子地区震旦-寒武纪磷块岩几十年的勘查研究发现,磷块岩中的颗粒不是或大部分不是内碎屑,特别是厚层状高品位叠层石磷块岩是菌藻类生物直接堆积的产物。磷块岩选矿试验是磷块岩物理富集成矿的成矿实验,选矿实验研究证明,天然水介质条件下,使磷质富集是不可能的。

In the early 1950s,Sarvin and Visser put forward that the location of the formation of phosphorite is not the current location,but was deposited into the present area by mechanical carring.It is believed that the phosphorus rock has a"Generating zone"and"Accumulation zone."Thirty years later,Ye Lianjun and Chen Qiying believed that most of the phosphorite has internal debris structures.The enrichment of phosphorus is the direct product of the tidal flow and storm flow on the repeated scouring of the mineral source or the ores,and"Theory of physical enrichment and ore-forming of industrial phosphorite"was founded.In the past three decades,the"phosphorite microbial mineralization theory"and the"Theory of physical enrichment and ore-forming of phosphorite"have developed simultaneously,and it is believed that rich ore(P_(2)O_(5)≥30%)is microbial constructed,not a product of physical enrichment.The theory of physical enrichment ore is not supported by modern phosphate rock physical enrichment ore data.It mainly draws on the research results of carbonate internal clastics.Carbonate rocks are mostly formed by direct accumulation of biological debris.Our decades of investigation and research on the Sinian-Cambrian phosphorites in the Upper Yangtze area have found that the Particles in phosphorites are not or mostly not internal clastics,especially the thick layered high-grade stromatolite phosphorous blocks.Rock is the product of direct accumulation of bacteria and algae.The ore dressing experiment of phosphorite is metallogenic experiment of physical enrichment of phosphorite.The ore dressing experimental study proves that it is impossible to enrich the phosphorus under natural water medium conditions.