The study of Permian radiolarias in South and Southwest China has been advancedin recent years.A well—preserved radiolarian fauna of Triassic is recently found
Zoning in ore bodies,ore deposits and ore regions are recognized astemporal-spatial structures generated by the dynamics of ore-forming processes.Viewed from th
Chevkinite specimen from a rare-earth mineral deposit in Sichuan,southwest ofChina have been studied in detail by means of transmission electron microscope(TEM).T