A. M. Zhirnov

Кhingan unique polycyclic protrusion of the Bureya massif with prolific polychronous mineralization (Far East)

Abstract. The paper characterizes the Hadean–Proterozoic Khingan tectonic protrusion located in the southern Bureya polychronous massif (AR–MZ) and having predominantly Paleozoic granites that the Mesozoic volcanic depressions and a large cover of the Pliocene–Quaternary basalts overlay. The region’s small area locates several ancient sediment structures and a series of variously-aged igneous rocks. The Hadean crystalline shales and peridotites with a density of 3.0–3.05 g/cm3 compose the basement ledge in the western region. The Lower Proterozoic and Upper Proterozoic sediment structures of metamorphic rocks sequentially margin the ancient protrusion from the east, while the Archean meridional folds are located southward of the ancient protrusion. Large mineral raw material deposits are associated with the Proterozoic, Paleozoic, Mesozoic, and Cenozoic structures that determine the unique variously-aged and polymetallic metallogeny of the Khingan ore-bearing region. Some fields are being mined, but many promising sites require exploration and appraisal work. The polycyclic–multiphase uniqueness of the region’s geological structure has not been observed before, and polymetallic specificity of its metallogeny has been determined only in recent years.

Keywords: Paleozoic granite, Prepaleozoic protrusion, deposits, tin, iron, gold, uranium, graphite