Gold Metallogeny of the Eastern Tannu-Ola Ore District, Tuva Republic

The Elegest-Mezhegei, Aptara, and Shivilig forecasted gold ore clusters, along with the Kharalyg and Irbitei forecasted gold–silver–polymetallic ore clusters, have been identified within the Eastern Tannu-Ola iron–copper–polymetallic–gold ore region. This identification is based on a comprehensive examination of historical and new geological, geochemical, and metallogenical data. Subsequently, the Urgailyg, Proezdnoe, and Chumurtuk forecasted gold ore fields were delineated within the Elegest-Mezhegei cluster, the Despen ore field within the Aptara ore cluster, and the Ovur-Ongesh ore field within the Shivilig cluster. Additionally, the Ulug-Sailyg and Ak-Charinsk gold–molybdenum–copper ore fields were distinguished outside the ore clusters. The article summarizes the investigation history, geological-structural position, geological features, and geochemical specialization of the rocks in the East Tannu-Ola region. It details the geological structure, ore mineralogy, and native gold characteristics of the identified ore clusters. It also describes the parameters of the gold-sulfide–quartz, gold-skarn, gold-containing polymetallic VMS, and porphyry molybdenum–copper mineralized zones. The conclusions emphasize the metallogenic epochs and distribution patterns of gold and gold-containing mineralization within the region studied.