1.Objectives The Tiechang tin deposit is located in the northern part of the Baoshan Terrane of the Sanjiang Tethys Orogeny in western Yunnan Province of China.Tiechang tin deposit mainly occurs in the migmatite accom...1.Objectives The Tiechang tin deposit is located in the northern part of the Baoshan Terrane of the Sanjiang Tethys Orogeny in western Yunnan Province of China.Tiechang tin deposit mainly occurs in the migmatite accompany with the structural fracture zone,and only a few of them occur in the internal contact zone between metamorphic rock and migmatite or in the interlayer fracture zone in metamorphic rock(Fig.1;Lei YA et al.,2013).Different from most tin deposits(such as Lailishan deposit at 47 Ma;Xiaolonghe deposit at 71 Ma;Tieyaoshan deposit at 119 Ma;Chen XC et al.,2014)in western Yunnan,the mineralization of Tiechang tin deposit occured in Oligocene.Therefore,the metallogenic chronology of tin deposits in western Yunnan needs to be further improved.In this paper,the authors use the cassiterite U-Pb LA-ICP-MS method to determine the metallogenic age of the Tiechang tin deposit.展开更多
基金supported by the National Key Research and Development Program of China(2018YFC0603704)project of the China Geological Survey(DD20190166,DD20190159).
文摘1.Objectives The Tiechang tin deposit is located in the northern part of the Baoshan Terrane of the Sanjiang Tethys Orogeny in western Yunnan Province of China.Tiechang tin deposit mainly occurs in the migmatite accompany with the structural fracture zone,and only a few of them occur in the internal contact zone between metamorphic rock and migmatite or in the interlayer fracture zone in metamorphic rock(Fig.1;Lei YA et al.,2013).Different from most tin deposits(such as Lailishan deposit at 47 Ma;Xiaolonghe deposit at 71 Ma;Tieyaoshan deposit at 119 Ma;Chen XC et al.,2014)in western Yunnan,the mineralization of Tiechang tin deposit occured in Oligocene.Therefore,the metallogenic chronology of tin deposits in western Yunnan needs to be further improved.In this paper,the authors use the cassiterite U-Pb LA-ICP-MS method to determine the metallogenic age of the Tiechang tin deposit.
