syenite porphyry, quartz porphyry stocks and granite and felsite dikes
Commodity and development information
Grade of ore minerals varies from 0.0010.01% Cu, rare 0.1% Cu. Consists of weak Cu minerals in altered Late Permian rhyolite and dacite porphyry, their tuffs, tuff breccia and ignimbrite of the Khustai unit, intruded by syenite porphyry, quartz porphyry stocks and granite and felsite dikes. Zones of intensive breccia, epidote alteration, silica alteration, limonitization and weak Cu minerals. Cu minerals occur in sublongitudinal zone with a length of 5.06.0 km and width of approximately 2.0 km. Three quartz-rich bodies, up to 10 m by 50 m, have weak chalcopyrite disseminations and malachite and azurite coatings. Host volcanic rock is altered to sericite, kaolinite and local intense silica.
Study area name
Central Asian Orogenic Belt
Dejidmaa and others (2002); Nokleberg and others (1999); Nokleberg and others (2003); Nokleberg and others (2006); B. Gurlkhaajav and others (written commun., 1974); Warren J. Nokleberg (written commun., 2006)
Mihalasky, Ludington, Hammarstrom, and others (2015)
Dejidmaa, G., Bujinlkham, B., Ganbaatar, T., Oyuntuya, N., Enkhtuya, B., Eviihuu, A., and Monkh-Erdene, N., 2002, Distribution map of mineral deposits and occurrences in Mongolia: Ulaanbaatar, Mongolia Mineral Resources Authority, Geologic Information Center, 540 p., 12 sheets, scale 1:1,000,000.