In the northwest of China, auriferous altered cataclasite, adular-sericite quartz vein and quartz reef types are present, and metallogenetic epoch is mainly Hercynian period.

• 西北部地区主要有蚀变碎裂岩型、冰长石-绢云母石英脉型和石英脉型等，成矿时代主要为海西期；