Rare Earth Element Occurrences in the United States

Version 4.0 of this data release provides descriptions of more than 200 mineral districts, mines, and mineral occurrences (deposits, prospects, and showings) within...本数据发布的4.0版本对范围内的200余个矿区、矿山及矿化点（含矿床、找矿靶区与矿化显示）进行了描述。