Structural Conditions of Polymetal Mineralization Localization in the Cho Dien Ore Cluster in the Lo Gam Metallogenic Zone, Northern Vietnam

Abstract

Structural research in the Cho Dien ore cluster and its environs has revealed that folds and faults were formed by sublatitudinal stresses. At the Nam Lung deposit, the stratified ore-bearing strata show evidences for upward interlayer migration of ore constituents, which is associated with wide development of interstratal thrusts during the anticline formation. Migrating ore constituents constrained by step faults cutting the anticline hinge zone accumulate to form low-angle ore shoots. Such a mechanism of structural control to mineralization is probably one of the conditions for most commercially important Pb-Zn deposits to be confined to the anticline hinge zone in the Cho Dien ore cluster.