The paper presents the frst data on ore mineralization in rocks of the promising area near the town of Rashad, Republic of Sudan. The metasomatic rocks contain pyrrhotite, pentlandite, pyrite, galena, chalcopyrite, sphalerite, arsenopyrite, hematite, magnetite, anglesite, leucoxene, Ag sulfosalts (freibergite, pyrargyrite), Ag and Pb tellurides (hessite and altaite), native gold and bismuth. The fneness of gold varies from low to high.

Key words: precious metal minerals, gold, tellurides, Republic of Sudan.

Yu.A. Ryzhkova, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass,
Chelyabinsk oblast, 456317 Russia; padushina@mail.ru

I.A. Blinov, South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass,
Chelyabinsk oblast, 456317 Russia

1. Abu Fatima M. (2019) Overview of the minerals potential of the Sudan and investment opportunities. http:// mineafrica.com/documents/Sudan.pdf. (date of request 25.08.2020)
2. Awadalla Yassin A., Khalil F.A., Gadir El Shafe A. (1984) Explanatory note to the geological map at the scale of 1:2,000,000 of the Democratic Republic of the Sudan. Ministry of Energy and Mining Geological and Mineral Resources Department. 35, 1–63.
3. Geological map of the Sudan (1981). Scale 1:2000000. Drawn up by the Departement Arts Graphiques, B. R. G. M. Orleans France.
4. Goldfarb R.J., Baker T., Dube B., Groves D.I., Hart C., Gosselin P. (2005) Distribution, character, and genesis of gold deposits in metamorphic terranes. Economic Geology 100th Anniversary Volume (eds. J. Hedenquist, J. Thompson, R. Goldfarb, J. Richards), 407–450.
5. Groves D., Goldfarb R., Robert F., Hart C. (2003) Gold deposits in metamorphic belts: overview of current understanding, outstanding problems, future research, and exploration signifcance. Economic Geology, 98, 1–29.
6. Johnson P.R., Zoheir B.A., Ghebreab W., Stern R.J., Barrie C.T., Hamer R.D. (2017) Gold-bearing volcanogenic massive sulfdes and orogenic-gold deposits in the Nubian Shield. South African Journal of Geology, 120(1), 63–76.
7. Morrison G.W., Rose W.J., Jaireth S. (1991) Geological and geochemical controls on the silver content (fneness) of gold in gold-silver deposits. Ore Geology Reviews, 6(4), 333–364.
8. Schluter Th. (2006) Geological atlas of Africa with notes on stratigraphy, tectonics, economic geology, geohazards and geosites of each country. Berlin, Springer, 261 p.
9. Scott S.D. (1983) Chemical behaviour of sphalerite and arsenopyrite in hydrothermal and metamorphic environments. Mineralogical Magazine, 47, 427–435.
10. Sharp Z., Essene E., Kelly W. (1985) A re-examination of the arsenopyrite geothermometer: pressure considerations and applications to natural assamblages. Canadian Mineralogist, 23, 517–534.
11. Shirkunov V.V. (2018) Gold mining in Sudan. http:// www.shirkunov.org/sudan_gold_mining.pdf. (date of requ-est 25.09.2020) (in Russian)
12. Sorokin A.B., Kozhevnikova E.G. (2014) [History and prospects of the Gebeit ore feld (Republic of Sudan)]. Zolotodobycha [Gold Mining], 9(190). https://zolotodb.ru/ article/11127 (date of request 1.10.2020) (in Russian)
13. Stolojan N. (1999) [Pyrite-polymetallic and gold (secondary enrichment) mineralization in the Ariabian region (Red Sea hills, Sudan)]. Metallogeniya drevnikh i sovremennykh okeanov-1999. Rudonosnost’ gidrotermal’nykh sistem [Metallogeny of ancient and modern oceans-1999. Ore content of hydrothermal systems]. Miass, IMin UrO RAN, 190–195. (in Russian)
14. Verkhozin S.S. (2020) [Gold mining industry of Sudan. Overview]. Zolotodobycha [Gold Mining]. https://zolotodb. ru/article/12372 (date of request 15.09.2020) (in Russian)
15. Wipfer E.L. (1998) [Gold-bearing siliceous-barite facies in the Aryabian ore region, Northeast Sudan]. Metallogeniya drevnih i sovremennyh okeanov-1998. Rudy i genesis mestorozhdeniy [Metallogeny of ancient and modern oceans-1998. Ores and genesis of deposits]. Miass, IMin UrO RAN, 52–57. (in Russian)