Geology, mineralogy and stable isotope geochemistry of the Dzuunmod area in northern Mongolia: Constraints for gold ore genesis and sources

Geology, mineralogy and geochemistry of Tavt gold deposit in Dzhida zone, northern Mongolia: implications for the evolution of intrusion and ore mineralization

“…The absence of tetrahedrite in the Tavt deposit also enables to exclude the metamorphic origin of ore-forming fluid considering that the precipitation of tetrahedrite is likely to be related to other orogenic gold deposits (e.g., Staude et al, 2010). In addition to tetrahedrite, the orogenic gold deposits distributed in the Dzuunmod ore district, northern Mongolia are characterized by abundant arsenopyrite and pyrite (Kim et al, 2020). However, the reduced IRGS is different from the oxidized one, mainly due to their low Cu contents and the presence of scheelite with arsenopyrite (Hart, 2007;.…”

“…In order to classify the types of the gold deposits, the genetic relationship between intrusion and gold mineralization has been emphasized by several researchers since 1990s (Sillitoe, 1991;Groves et al, 1998;Sillitoe and Thompson, 1998;Lang, 2000). However, the intrusion-related gold systems (IRGS) in Mongolia have not been well understood compared to orogenic gold deposits (Cluer et al, 2005;Khishgee et al, 2014;Khishgee and Akasaka, 2015;Kim et al, 2020), although they show a geological and geochemical consistency such as low salinity and CO 2 -rich fluid and an association with igneous complex (Hart and Goldfarb, 2005;Hart, 2007).…”

“…A genetic relationship between intrusion and gold mineralization indicates that an understanding of the intrusive rocks as host rock is key to study the origin and the ore-forming processes of the gold deposit (e.g., Thompson et al, 1999). Geological, mineralogical and petrographic approaches to host rocks, ore minerals and gangue minerals help to describe the relationship of one another, leading to identify the occurrence of gold mineralization (e.g., Sillitoe and Thompson, 1998;Thompson et al, 1999;Goldfarb et al, 2005;Kim et al, 2020;Sun et al, 2020). A temporal and spatial relationship between intrusion and ore mineralization processes enables not only to constrain the mineralization ages, but to understand the role of intrusive complex on the ore-forming processes in the IRGS (Hart and Goldfarb, 2005;Tuduri et al, 2018).…”

“…Compared to other orogenic gold type deposits such as Boroo, Olon Ovoot, Undurnaran and Gatsuurt which has been relatively well studied (Cluer et al, 2005;Khishgee et al, 2014;Khishgee and Akasaka, 2015;Oyungerel et al, 2018;Kim et al, 2020) there have been few researches about the Tavt deposit since it was discovered. In the Tavt deposit, there are various intrusive complexes with different ages from Early Paleozoic to Early Mesozoic including the Dzhida (ε 2-3 ), Selenge (P 1-T 2 ) and Orkhon (T 3 ) complexes (Tsend-Ayush and Buldakov, 1998;Badarch et al, 2002;Gordienko et al, 2007;Oyungerel et al, 2018).…”

Gobi Altai, Khangai and Khentii Mountains mapped by a mixed-method cartographic approach for comparative geophysical analysis

“…Northern and central Mongolian coal-bearing basins contain mainly Jurassic sub-bituminous coal. Northern Mongolia is also notable for the North Khentii Gold belt which includes lode gold deposits: Gatsuurt, Sujigtei and Boroo (Kim et al 2020). Eastern Mongolian province has Lower Cretaceous lignite (Erdenetsogt et al 2009).…”