auto; mso-margin-bottom-alt: auto; mso-outline-level: 2" class=MsoNormal>The Genesis of Hongtugou Au Deposit of oft-com:office:smarttags" />Qilian County, Qinghai Provinceoft-com:office:office" />
///The Hongtugou Au deposit is in the structural fracture alteration zone of contact between clastic rock series and rock body.The Au can be divided into 2 types of visible Au and submicroscopic Au.The Au metallogenesis is in close relation to the alteration of ultrabasic rock.This ore deposit belongs to the middle-low T metamorphic hydrothermal Au deposit of ophiolite controlled by structural fracture alteration zone.