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

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 adeterminant factor of the for mation of a series of minerals. And the series minerals assemblaged a complex and microcrystalline mineral mixture, including essential minerals: hot sonite, woodhouseie, 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 pro tect the environment, and ithas important signif icance for the ecological study.