Numerous research works have been carried out in the study area for decades. The article is devoted to a detailed analysis and assessment of placer gold content in the main river basins of the Nakhchivan Autonomous Republic, their primary sources, typomorphic features of placers, etc. This investigated the relationship of gold placers with their primary sources. The Bashkendchay and Alidzhachay river basins with tributaries for placer gold have been explored, promising areas have been identified. As a result of the research, it has been shown that these zones are highly promising. In the course of the studies, the typomorphic features of placer gold were revealed: detrital, oblate-detrital, porous, isometric, dendritic, ­elongated dendritic, etc., the chemical composition of gold was determined by local micro-X-ray spectral analysis. According to the results of spectral analysis, copper, mercury, lead, antimony, etc. were identified as impurity elements in the composition of gold. Bi, Cu, Fe, Hg, Mn, Rb, Sb, Te are the impurity elements in the composition of gold according to quantitative spectral analysis. The studies led to the conclusion that the location of primary deposits and manifestations of the study area close to each other determines the close location of placer gold accumulations. The considered typomorphic features, size classes, high fineness, limited fineness, a small amount of impurity elements, monogranular internal structure of alluvial gold also indicate a connection with nearby primary sources. Placer gold with high prospects is concentrated mainly in alluvial, alluvial-proluvial deposits.

Keywords: placer gold content, river basins, primary sources, alluvial deposits, volcano-dome structures

REFERENCES

Aichler J., Malec J., Veсera J., Hanzl P., Burianek1 D., Sidorinova T., Taborsky Z., Bolorma Kh., Byambasuren D. Prospection for gold and new occurrences of gold-bearing mineralization in the eastern Mongolian Altay. Journal of Geosciences, No. 53(2), 2008, рр.123-138.

Azadaliev J.A. Establishment of primary sources of placer gold in the Nakhchivan folded region (on the example of the Bashkend deposit, Azerbaijan). Otechestvennaya Geologiya, Moscow, No. 1-2, 2012, pp. 12-17 (in Russian).

Azadaliev J.A., Kerimov F.A. Some issues of studying the geological and geomorphological conditions for the formation of gold-bearing placers in the basin of the Bashkendchay river (Nakhchivan Autonomous Republic, Azerbaijan). Reports of National Academy of Sciences of Azerbaijan, Vol. LXII, No. 3-4, 2006, pp. 133-144 (in Russian).

Azadaliev J.A., Kerimov F.A. Typomorphic features of placer gold in alluvial deposits of the Bashkendchay river basin (Nakhchivan Autonomous Republic, Azerbaijan). Reports of National Academy of Sciences of Azerbaijan, Vol. LXI, No. 6, 2005, pp. 94-101 (in Russian).

Azadaliev J.A., Musaev Sh.D., Kerimov F.A. Prospects for identifying primary sources of alluvial gold within the Nakhchivan Autonomous Republic. Reports of National Academy of Sciences of Azerbaijan, Vol. LVIII, No. 5-6, 2002, pp. 198-206 (in Russian).

Baba-zade V.M., Musaev Sh.D., Nasibov T.N., Ramazanov V.G. Gold of Azerbaijan. Azerbaijan National Encyclopedia. Baku, 2003, 423 p. (in Russian).

Babazadeh V.M., Abdullayeva Sh.F., Novruzova S.R., Ibrahimov J.R. Gold-bearing volcanogenic fields of non-ferrous metals of the ­Lesser Caucasus and the Eastern Pontides and their genesis. ANAS Transactions, Earth Sciences, No. 2, 2024a, pp. 17-32, DOI: https://www.doi.org/10.33677/ggianas20240200123.

Baba-zadeh V.M., Abdullayeva Sh.F., Novruzova S.R. Structural conditions for the localization of gold mineralization within the Tutkhun ore field (the central part of the Lesser Caucasus). ANAS Transactions, Earth Sciences, No. 1, 2024b, pp. 104-118, DOI: https://www.doi.org/10.33677/ggianas20240100112.

Becker N., Batt W. Waikaia placer gold mine, Southland. Australas. Institutes Minerals Metall. Monogr., 31, 2016, pp. 387-394.

Berkovich K.M., Zlotina L.V., Turykin L.A. Channel processes and the use of natural resources of the river (on the example of the Oka). Geography and natural resources. No. 1, 2015, pp. 98-104 (in Russian).

Bogatyrev L.I. Typomorphic features of placer gold on Ozerninskij ore region. Freiberg Forschungsforum 60 Berg- und Hüttenmännischer Tag. TU Bergakademie Freiberg, Germany, 2009, pр. 39-42.

Carling P.A., Breakspear M.D. Placer formation in gravel-bedded rivers. Ore Geology Reviews, Vol. 28, 2006, рр.377-401.

Geology of Azerbaijan. Minerals. Alluvial gold. Vol. VI. Nafta-Press, Baku, 2003, pp. 321-354 (in Russian).

Goldfarb Yu.I., Petrov A.N., Preis V.K., Skurida D.A. Geological prerequisites for differentiated approach to prospecting and exploration of alluvial gold placers: an example from the northeast of Russia. Russian Journal of Pacific Geology, Vol. 9, Issue 3, 2015, pp.166-177.

Mineral resources of Azerbaijan. Publishing House Ozan. Baku, 2005, 808 p. (in Russian).

Musaev Sh.D., Kerimov F.A., Isaeva N.S. Gold-bearing placers of the Alinjachay river. Physics, Mathematics, Earth Sciences, No. 2, 2004, pp. 76-82 (in Russian).

Nagiyev V.N., Mammadov I.A. Minerals of Nakhchivan Autonomous Republic. Elm. Baku, 2010, 240 p. (in Azerbaijani).

Patyk-Kara N.G. Minerageny of placers: types of placer provinces. IGEM RAN, Moscow, 2008, 528 p. (in Russian).

Patyk-Kara N.G. Placer deposits of Russia and other CIS countries. Nauchny mir. Moscow, 1997, 454 p.

Ramazanov V.G., Kalandarov B.G., Takhmazova T.H., Mansurov M.I. Predictive assessment of the gold content of the territory of the Azerbaijan Republic. Natural and technical sciences. Series of Earth Sciences. Moscow, No. 4 (42), 2009, p.194-197 (in Russian).

Shilo N.A. Teaching about placers. Publishing House “Academy of mining sciences”. Moscow, 2000, 632 p. (in Russian).

Shumilov Yu.V. On the issue of quantitative assessment of placer formation processes. Problems of placer geology: Magadan, Northeast Integrated Research Institute, 2000, pp.125-132 (in Russian).

Tahmazova T.H. Spatial characteristics and potential prospects of scattered gold assemblages in the Alinjechay area. News of Baku State University, No. 1, 2017, pp. 123-131 (in Azerbaijani).