Usually, there are two stages of ancient mining activity known in the Khongor prospect region. The earlier stage of mining activity was developed during the Bronze Age. The second stage is related to end of the 19th century and early 20th century, which was named “old Chinese workings”. These ancient mining activities are represented by dominantly small hand mining open pits and mining dumps on the recent surface. Probably massive turquoise (as jewelry), high grade copper oxide ore, native copper and placer gold were mined from these open pits. Several small hand mining open pits and dumps exist at the Nomin Tal copper occurrence, located 5km southwest of the Khongor prospect. Also, numerous old workings can be observed on the northern slope of the Edrengin Nuruu mountain range, located 30-40km southwest from the our prospect area, where gold nuggets where mined from the Cretaceous conglomerate.
The prospect region was covered by systematic geological studies, as 1:1,000,000 scale geological and 1:500,000 scale geological and hydrogeological mapping and prospecting in period 1951-1976. In 1964-1965, Russian geologists Uflyand A.K, Filipova I.B. and Chehovich M.B. were carried out 1:1,000,000 scale geological mapping and prospecting in this region, which occupies large areas to the east and north of the Khongor prospect. The western part of the Khongor prospect region was covered by 1:500,000 scale geological and hydrogeological survey in 1951-1952 (Boyahonin V.S. and others), while the eastern part of this region was covered by a 1:500000 scale geological and hydrogeological survey in 1972-1973 (Stepanov A.N. and others). The whole region was covered by 1:500,000 scale geological mapping and prospecting in 1983-1985 (Borzakovski Yu.A and others). During these investigations, regional geological structure of the Khongor prospect region was clarified and several mineral ore showings and geochemical anomalies were identified in this region.
More detailed geological mapping and prospecting of the prospect region was started in 1986. During 1986-2003, this region was covered by 1:200,000 scale geological mapping and prospected by Russian, Mongolian and Czech geologists. During these geological studies, the geological structure of the region was clarified in detail and several hydrothermal-metasomatic altered and mineralization zones, mineral occurrences, ore showings, geochemical anomalies were identified in this region. In 1986, 1:200,000 scale geological mapping and prospecting was carried out by Russian and Mongolian geologists (Zabotkin L.B and others) on the northeast extension of the Khongor prospect.
The territory to the north of the recent Zuun Mod porphyry molybdenum-copper deposit and to the east of the Khongor prospect was covered by the southwest corner of this mapping and prospecting program. During this program, the Khuvin Khar copper occurrence was identified in the big granite intrusion, which is located on the license area of the recent Erdene Mongol company. The southeast corner of the Khongor prospect and the Zuun Mod porphyry molybdenum-copper deposit region was covered by 1:200,000 scale geological mapping and prospected in 1996-1998 (Bukhbat S and others). It was identified as the first Zuun Mod molybdenum-copper mineralization zone (1996). The northern main part of the Khongor prospect (almost 70% of the prospect) was covered by 1:200,000 scale geological mapping and prospecting in 2003 (Gansukh D. and others). They identified several copper, zinc, lead and gold ore showings and geochemical anomalies on the Khongor prospect. The Czech and Mongolian geologists carried out 1:200,000 scale geological mapping and prospecting on southern part of the Khongor prospect.