湖北竹山寒武纪碳硅质板岩中磷钙铝矾——纤磷钙铝石矿物的特征及研究意义

The Characteristics and Significance of Woodhouseite and Crandallite Series Minerals in Cambrian Carbon-Silicon-Slate,Zhushan,Hubei Province

湖北竹山寒武纪碳硅质板岩层间破碎带内大量块状、结核状磷钙铝矾——纤磷钙铝石系列矿物,与绿松石伴生,是地表水淋滤作用形成的,化学成分分析显示,SO24-浓度是磷钙铝矾——纤磷钙铝石系列矿物形成的决定因素。该系列矿物是一个复杂的多矿物组成的微晶集合体,主要矿物种属有磷铝矾、磷钙铝矾、纤磷钙铝石、沸水硅磷铝石等。该系列矿物磷和硫的含量高,能够吸附较丰富的多金属元素,并能聚集多种阴离子团,形成一道有效的地球化学障,对环境保护和生态学研究具有独特的意义。

Lots of blocky and nodular woodhouseite and crandallite series minerals, with paragenetic turquoise in interlayer-fracture zone of Cambrian Perild carbon-silicon-slate, Zhushan, Hubei province are caused by leaching of surface water. SO4^2- concentration was a determinant factor of the formation of a series of minerals. And the series minerals assemblaged a complex and microcrystalline mineral mixture, including essential minerals： hotsonite, woodhouseite, crandallite and viseite. Geochemical analysis results of samples indicate that it is able to adsorb many kinds of metals and anion groups. They are geochemical barrier to protect the environment, and it has important significance for the ecological study.