ON THE GOLD MINERALIZATION IN WEATHERING CRUSTS OF THE RYBACHY SITE (WESTERN SIKHOTE-ALIN)

E.V. Nigai

Аннотация


The author addresses an issue of gold presence in pre-Quaternary crusts of weathering that are widespread in sub-mountain areas of the doming-block geomorphological structures of the Amur Region, the Khabarovsk and Primorsky Territories along the periphery of large- and medium-sized Cenozoic basins and depressions.For a more detailed mining and geological study and assessment of the gold content of the weathering crusts, we recommended the Rybachy site as one of these objects (insufficiently studied), and the entire Mukhenskaya area as a promising one. These sites are located in the zone of articulation of the eastern side of the Middle Amur Depression with the folded structures of the West Sikhote-Alinsky volcanic belt.

The author gives examples of large gold deposits, related to weathering crusts with their brief description (Olympiada, Kuranakh), as well as a brief description of alluvial deposits of weathering crust (sub-basalt cl.Paskhalny, an eluvial-alluvial placer of the Bolotisty Stream).The search work of the DVIMS (Far Eastern Institute of Mineral Raw Materials) in 2002 indicated the potential of weathering crusts within the Rybachy prospect for gold mineralization.This is supported by elevated gold in  heavy mineral concentrates from the linear weathering crusts and residual blankets, as well as from non-commercial placers (from 0.01 to 4.0 g/t and higher); the occurrence of fracture zones, brecciation, secondary silicification close by fractures, and abundant Late Cretaceous silicic and intermediate dikes. Zones of hydrothermally altered rocks (silicification, chloritization, sericitization, argillization) are widespread here.  


Ключевые слова


gold mineralization; weathering crusts; West Sikhote-Alin volcanogenic belt; Rybachy prospect; Mukhenskaya area; southern Far East of Russia

Литература


Bilibin Yu.A. Localization of gold content in connection with the tectonics of the North-East. Problemy sovetskoi geologii, 1937, no. 5–6, pp. 419–427. (in Russ.).

Bilibin Yu.A. Osnovy geologii rossypei (Fundamentals of placer geology). Moscow: GONTI Publ., 1938. 495 p. (in Russ.).

V poiskakh samorodnogo zolota (In search of native gold). Available at: hppt://www.goldru.info (accessed: 08.04.2021). (in Russ.).

Volarovich G.P. Brief description of the types of gold placers in the southern part of the Far East. Tr. TsNIGRI, 1963, no. 53, pp. 3–27. (in Russ.).

Voskresenskii S.S. Geomorfologiya rossypei (Geomorphology of placers). Moscow: Moscow State University, 1985. 205 p. (in Russ.).

Geologiya zolotorudnykh mestorozhdenii Vostoka SSSR (Geology of gold deposits in the East of the USSR). Moscow: TsNIGRI Publ, 1988. 264 p. (in Russ.).

Gosudarstvennaya geologicheskaya karta RF (State Geological Map of the Russian Federation): masshtab 1:1 000 000 (tret’e pokolenie). List M-53 – Khabarovsk. Ob”yasnitel’naya zapiska / A.F. Vas’kin, V.A. Dymovich, A.F. Atrashenko, V.B. Grigor’ev, V.N. Zelepugin, E.S. Opalikhina, L.A. Sharov, L.Yu. Leont’eva; A.F. Vas’kina, Ed. Saint-Petersburg: Kartfabrika VSEGEI, 2009. 376 p. (in Russ.).

Lotina A.A. Gold-bismuth-telluric mineralization in the indigenous sources and placers of the Marshy deposit (Khabarovsk Krai). Dissertation of cand. Sci. (geol.–mineral.). Vladivostok: FEGI, 2011. 124 p. (in Russ.).

Mel’nikov V.D., Mel’nikov A.V., Shestakov B.I. Zolotonosnost’ kor vyvetrivaniya Amurskoi oblasti (Gold content of the Amur region weathering crust). Blagoveshchensk: AmSU, 2006. 116 p. (in Russ.).

Metallogeniya Dal’nego Vostoka Rossii (Metallogeny of the Russian Far East). Khabarovsk: Far Eastern Research Institute of Mineral Raw Materials, 2000. 218 p. (in Russ.).

Mineraly Rossii i stran blizhnego zarubezh’ya (Minerals of Russia and neighboring countries). Available at: hppt://www.webmineral.ru (accessed: 08.04.2021). (in Russ.).

Nigai E.V. Gold-bearing residual soils of tне Far East, problems of their complex research and development, in Zoloto severnogo obramleniya: Patsifika: tez. dokl. gorno-geologicheskoi konf. (2 Mezhdunar. gorno-geologicheskii forum, posvyashchennyi 110-letiyu so dnya rozhdeniya Yu.A. Bilibina) (Gold of the North Pacific Rim). Magadan: NEISRI, 2011, pp.158–162. (in Russ.).

Nigai E.V., Zhurnist V.I. On the establishment of geological and geomorphological works on the study and mapping of the weathering crusts of the Sutar-Bijan gold-bearing area, in Chelovecheskoe izmerenie v regional’nom razvitii: tez. IV mezhdunar. simpoz. (Human Aspects of Regional Development). Birobidzhan: CARPI FEB RAS, 1998, no.1, pp. 96-97. (in Russ.).

Nigai E.V. Gold-bearing weathering crusts of the eastern and north-eastern framing of the Sredneamurskaya Depression (Khabarovsk Krai), in Tektonika, glubinnoe stroenie i minerageniya Vostoka Azii: X Kosyginskie chteniya: materialy Vseros. konf. s mezhdunar. uchastiem. Didenko A.N., Manilov Yu.F., Ed. (Tectonics, deep structure and minerageny of East Asia: Contributions of the 10 All Russian Conference with foreign participantsin memory of Academician Yu.A. Kosygin. Khabarovsk: Yu.A. Kosygin Institute of Tectonics and Geophysics FEB RAS, 2019, pp. 195–197. (in Russ.).

Orlova N.I., Nechipasenko E.Yu., Vasil’ev E.A., Derbeko I.M. Analysis of the weathering crust of the Amur region in connection with the forecast assessment of the prospects for detecting gold placers, in Rossypnye mestorozhdeniya kor vyvetrivaniya – ob”ekt investitsii na sovremennom etape: tez. 10-go mezhdunar. soveshch. (Alluvial deposits of weathering crust – an object of investment at the present stage). Moscow: IGEM RAS, 1994, pp. 154–156. (in Russ.).

Rindzyunskaya N.M., Berzon R.O., Polyakova T.P., Matveeva E.V. Geologo-geneticheskie osnovy prognoza i poiskov mestorozhdenii zolota v korakh vyvetrivaniya (Geological and genetic bases of forecasting and prospecting for gold deposits in weathering crusts). Moscow: TsNIGRI Publ., 1995. 128 p. (in Russ.).

Sorokin A.P., Glotov V.D. Zolotonosnye strukturno-veshchestvennye assotsiatsii Dal’nego Vostoka (Gold-bearing structural-material associations of the Far East). Vladivostok: Dal’nauka Publ., 1997. 304 p. (in Russ.).

Shilo N.A. Osnovy ucheniya o rossypyakh (Fundamentals of the theory of placers). Moscow: Nauka Publ., 1985. 400 p. (in Russ.).

Shilo N.A. Uchenie o rossypyakh (Teaching on placers deposits). Moscow: Akademiya gornykh nauk Publ., 2000. 632 p. (in Russ.).


Ссылки

  • Ссылки не определены.