~(40)Ar/~(39)Ar DATING OF QUARTZ FROM THE AKTISHKAN GOLD DEPOSIT IN NURT OF NORTHERN ALTAY, XINJIANG

• 出 处: Scientia Geologica Sinica
• 发表日期: 2000年01期
• 关键词: granite Carboniferous plateau quartz dating Paleozoic volcanic epoch strata geoc

Quartz from the major ore-forming stage of the Aktishkan gold deposit in the Nurt region of Northern Altay, Xinjiang Autonomous Region, was analyzed by the 4oAr/39Ar fast-neutron activation dating technique, which gave a well-defined plateau age of 138.5±2. lMa and an isochron age of 135.414.2Ma. Combined with other geochronological data and the geological characteristics, it is concluded that there existed a Yanshanian gold metallogenetic epoch in the Northern Altay of Xinjiang, and the Yanshanian may be the principal mineralization period for gold deposits in the Nurt region.

Quartz from the major ore-forming stage of the Aktishkan gold deposit in the Nurt region of Northern Altay, Xinjiang Autonomous Region, was analyzed by the 4oAr / 39Ar fast-neutron activation dating technique, which gave a well-defined plateau age of 138.5 ± 2. Ma and an isochron age of 135.414.2 Ma. Combined with other geochronological data and the geological characteristics, it is concluded that there existed a Yanshanian gold metallogenetic epoch in the Northern Altay of Xinjiang, and the Yanshanian may be the principal mineralization period for gold deposits in the Nurt region.