Native gold in Ti-bearing placers of the Ariadna cluster and its bedrock sources (Primorye region)

Centuries of intense mining of noble metals from placers of the southern Far East has exhausted their reserves. The prospects for increasing the raw material base of the region are connected with complex exogenic deposits, where noble metals play a subordinate role. The study of native gold from Ti-bearing placers spatially and genetically associated with the Ariadna mafic-ultramafic massif located on the right side of the Bol’shaya Ussurka River reveals the placer-forming role of polygenic and polychronous bedrock sources. Mafic-ultramafic rocks yielded cupriferous and mercuric gold; quartz veins with Au-As mineralization likely serve as another source of placers.