Classification of Postmagmatic Ore Fields

The authors, noting shortcomings in previous classifications of ore bodies and ore fields, present a detailed system of distinguishing postmagmatic occurrences, further developing A. V. Korolev's 1954 system. That system noted three main groups, conformable, intersecting and contact bodies, subdivided into 11 classes and 18 types of ore bodies. The present classification divides all fields into two main groups: those in mobile zones and those in platforms. The resulting 26 categories are further subdivided to distinguish containing formations. The authors stress the need for such distinction. Examples are given for each deposit, including name of ore field, country where located and type of metal. Special attention is given to the occurrences of ores in Precambrian formations.–A. Eustus.