作者: W. D. Keller
DOI: 10.1346/CCMN.1968.0160304
关键词:
摘要: A deposit of kaolin clay, the site General Zaragosa Mine, located about 50 km northwest San Luis Potosi, S. L. P., Mexico, has produced more than 250,000 tons refractory clay by room and pillar mining methods during last 32 years. The was formed hydrothermal argillation part a fault block rhyolite flow-breccia probably welded tuff, presumably lower Tertiary in age. silica-rich gossan now exposed at surface caps deposit.