Special features of structural geomorphology and metallogeny of Mongolian arch uplift

Abstract

Morphostructural analysis of Mongolian relief established a sequence of arches differing in stages of uplift and denudation, the difference is marked by special features of arrangement of Mesozoic magmatic (both intrusive and effusive) rocks which remain at various parts of the arches. The authors discuss the arches formation as result of intrusion and subsequent arise of acid magmatic melts, which satisfactorily explains the differences in arches morphology in terms of time of intrusion and distribution of acid magma in the earthcrust throughout Mesozoic time. The arches rise essentially disturbs the lengthwise metallogenic zonality, which results in appearance of alien ore formations within metallogenic zones.