Lengenbachite from the Kochkovskoe gold deposit (Zabaykalsky Krai)
G.I. Shvedov, O.Yu. Perflova, S.A. Mavrinskaya, S.A. Silyanov, B.M. Lobastov
UDK 553.086. (571.55) | https://doi.org/10.35597/2313-545X-2019-5-4-3 | Read PDF(RUS) |
The article presents the analytical data on lengenbachite, a rare As-Pb sulfosalt, which was found in sulfde ores of the Kochkovskoe gold deposit in Zabaykalsky Krai. Until recent, lengenbahitе was found only in the Lengenbach quarry (Switzerland), Negus, Kohn (Canada) and Sherlovaya Gora (Zabaikalsky Krai) deposits. The mineral is identifed in two sulfde aggregates located in the low-Fe sphalerite of gold-quartz-carbonate-polymetallic stage. Aggregate 1 is composed of jordanite with lengenbachite inclusions (Ag489Cu1 25Pb1868As1246S3900, on average) and galena, which is overgrown by arsenopyrite and Ag-bearing tennantite. Aggregate 2 consists of an jordanitе grain with lengenbachite inclusions (Ag5.23 Cu 0.79Pb18.57As 11.93S39.00, on average).
Figures 5. Tables 3. References 17
Key words: Kochkovskoe gold deposit, lengenbachite, refection coefcient, Cu and Ag isomorphism, Zabaykalsky Krai
G.I. Shvedov, Siberian Federal University, pr Svobodny 79-10, Krasnoyarsk, 640041 Russia
g.shvedov@mail.ru;
O.Yu. Perflova, Siberian Federal University, pr Svobodny 79-10, Krasnoyarsk, 640041 Russia;
S.A. Mavrinskaya, OOO «Koryakmining», ul. Kostyushko-Grigorovicha, 5, Chita, 672000 Russia;
S.A. Silyanov, Siberian Federal University, pr Svobodny 79-10, Krasnoyarsk, 640041 Russia;
B.M. Lobastov, Siberian Federal University, pr Svobodny 79-10, Krasnoyarsk, 640041 Russia
- Betekhtin А.G. (1950) [Mineralogy]. Moscow, GIGL, 956 p. (in Russian)
- Chvileva T.N., Bezsmertnaya M.S., Spiridonov E.M. et al. (1988). [A guide-book for ore minerals in refected light]. Moscow, Nedra, 504 p. (in Russian).
- Dana J.D., Dana E.S., Palache C, Berman H., Fron-del C. (1951) [The system of mineralogy, 1(1), elements, sulfdes, sulfosalts]. Moscow, IL, 608 p. (in Russian).
- Hutchinson A. (1906) The chemical composition of lengenbachite. Mineralogical Magazine, 14, 204-206.
- Kasatkin A.V., Klopotov K.I., Plashil Ya. (2014) [Supergene minerals of Sherlovaya Mountain]. [Mineral-ogicheskiy almanah], [Mineralogical almanac]. 19(2), 94-137. (in Russian).
- Kostov I. (1971) [Mineralogy]. Moscow, Mir, 584 p. (in Russian).
- Makovicky E., Leonardsen E., Moëlo Y. (1994) The crystallography of lengenbachite, a mineral with the non-commensurate layer structure. Neues Jahrbuch fur Miner-alogie. Abhandlungen, 2, 169-191.
- Minerals. Guide-book (1960), 1, Moscow, AN SSSR, 617 p. (in Russian)
- Moëlo Y, Makovicky E., Mozgova N. Jambor J.L., Cook N., Pring A, Paar W., Nickel E.H., Graeser S., Karup-Møller S., Balic-Zunic T., Mumme W.G., Vur-ro F., Topa D., Bindi L., Bente K., Shimizu M. (2008) Sulfosalt systematic: a review. Report of the sulfosalt subcommittee of the IMA Commission on Ore Mineralogy. European Journal Mineralogy, 20, 7-46.
- Murowchick J.B. (1992) Marcasite inversion and the petrographic determination of pyrite ancestry. Economic Geology, 87, 1141-1152.
- Nufeld E.W. (1944) Studies of mineral sulphosalts: IX. Lengenbachite. Transactions of the Royal Society of Canada III. Series 38, 59-64.
- Povarennykh A.S. (1967) [Main features of crystal chemistry of copper and silver]. Problemy kristallokhimii i mineralov endogennogo mineraloobrazovaniya [Problems of crystal chemistry and minerals of endogenic mineral formation]. Moscow, Nauka, 77-95 (in Russian).
- Ramdohr P. (1962) [Ore minerals and their aggregates]. Moscow, IL, 1132 p. (in Russian).
- Shvedov G.I., Perflova O.Yu., Karnaukhova O.M., Mavrinskaya S.A. (2018) [Hydrothermalites and mineralogy of ores from the Kochkovskoe deposit as an indicator of formation conditions of gold mineralization]. Geodinamika i minerageniya Severnoi i Tsentral ´noi Azii [Geodynamics and minerageny of North and Central Asia]. Ulan-Ude, Buryat State University, 401-403 (in Russian).
- Solly R.H. (1905) Some new minerals from the Bin-nenthal, Switzerland. Mineralogical Magazine, 14, 72-82.
- Ridland G.C. (1941) Mineralogy of the Negus and Con mines, Yellowknife, Northwest Territories. Economic Geology, 36, 45-70.
- Williams T.B., Pring A. (1988) Structure of lengenbachite: A high-resolution transmission electron microscope study. American Mineralogist, 73, 1426-1433.
MINERALOGY № 4 2019