| Annotation |
The relevance lies in the need to get data on the chemical composition, abundance
and paragenesis of petzite, which is one of the mineral carriers of Te, Au and
Ag in the gold and silver ores of the Baley ore field in Transbaikalia. During the development
of deposits in the ore field, only Au and Ag were extracted, Te went to the
dump. The deposits have not been fully developed. The remaining Au reserves of the
Taseevskoye deposit are 105 tons, the Au resources of the Baley deposit are estimated
at 35 tons. In connection with the extraction of the remaining reserves of Au–Ag
ores of these deposits, where part of Te is in the form of petzite Ag3AuTe2, information
about it will be important for the development of technology for its extraction along
with other tellurides. The purpose of the study is to understand the chemical composition
and paragenesis of petzite. The tasks are to study the composition of petzite and
petzite-bearing mineral associations of the Baley ore field. The object of the study is Au–Ag ores of the Baley ore field, the subject of the study is the forms of isolation
and the chemical composition of petzite. Methodology and methods – optical and
electron microscopy with the identification of shapes and sizes of individuals and aggregates
of petzite, determination of its chemical composition. Research results are
the following: for the first time, the study of the chemical composition of petzite in the
ores of the Baley ore field, its abundance and paragenesis has been carried out. It
is found in association with hessite, native gold, miargyrite, tetrahedrite, tennantite,
pyrite, chalcopyrite, sphalerite, altaite, coloradoite, schützite, andorite, robinsonite,
quartz, adularia, carbonates, kaolinite and other minerals. The chemical composition
varies within the limits (wt%): Ag 41.57–48.16; Au 18.55–26.01; Te 30.79–35.18.
Petzite average chemical composition (wt%): Ag 43.91; Au 22.61; Te 33.16. This
indicates the nonstoichiometric composition of its composition and an excess of Ag
and Te and a deficit of Au. Petzite, as a carrier of these elements, can be one of the
sources of Te in the technology of processing gold and silver ores. |
| References |
1. Baley ore field. Moscow: TSNIGRI, 1984. (In Rus.).
2. Dena Dzh. D., Dena E. S., Pelach CH., Berman G., Frondel K. System of Mineralogy. Elements, sulfides,
sulfosols. Under. Ed. by D. P. Grigoriev. Moscow: Publishing of foreign literature, 1951. (In Rus.).
3. Ivanov V. V. Ecological geochemistry of elements. Moscow: Nedra, 1996. (In Rus.).
4. Nekrasov I. Ya. Geochemistry, mineralogy and genesis of gold deposits. Moscow: Nauka, 1991. (In
Rus.).
5. Nenadkevich K. A. Essay on the study of bismuth ores of Transbaikalia. Imprint from trudov state.
Institute of Public Education in Chita. Chita: Tipografiya Dalprofsovet, 1922. (In Rus.).
6. Rutshteyn I. G., Bogach G. I., Vinnichenko E. L., Negoda V. M., Pinaeva T. A., Shivokhin E. A., Karasev
V. V., Nadezhdina T. N. State geological map of the Russian Federation, scale 1:200 000. Priargunskaya series.
Sheet M-50-III (Baley) Second edition. Explanatory letter. Saint Petersburg: Piter, 1998. (In Rus.).
7. Spiridonov A. M., Zorina L. D., Kitaev N. A. Gold-bearing ore-magmatic systems Transbaikalia.
Novosibirsk: GEO, 2006. (In Rus.).
8. Fleisher M. Dictionary of mineral species. Moscow: Mir, 1990. (In Rus.).
9. Yurgenson G. A. On the possibility of the existence of a shallow gold-fluorite ore formation. Gold of
Siberia and the Far East: geology, geochemistry, technology, economics, ecology. Theses 3rd All-Russian
Symposium with international participation. Ulan-Ude: Buryat. national Center of SB RAS, 2004. (In Rus.).
10. Yurgenson G. A. Typomorphism and forecast of gold-silver mineralization. Chita: Transbaikal State
University, 2014. (In Rus.).
11. Yaroshevskiy A. A. The prevalence of chemical elements in the Earth’s crust. Geochemistry, no. 1,
pp. 54–62, 2006. (In Rus.).
12. Greffi C., Bailly L., Milesi J.-P. Supergene alteration of primary ore assemblages from low-sulfidation
Au–Ag epithermal deposits of Pongkor, Indonesia, and Nazareno, Peru. Economic Geology, vol. 97, no. 3,
pp. 561–571, 2002. (In Eng.).
13. IMA, 2021. The New IMA List of Minerals – a Work in Progress. Updated: July 2021. Web. 21.10.2022.
https://www.researchgate.net/publication/352035655_IMA_Commission_on_New_Minerals_Nomenclature_
and_Classification_CNMNC_-_Newsletter_61. (In Eng.).
14. Malcolm E. Back. Fleisher’s Glossary of Mineral Species. The Canadian Mineralogist, no. 46,
pp. 1379–1380, 2014. (In Eng.).
15. Missen O. P., Ram R., Mills S. J., Etschmann B., Reith F., Shuster J., Smith D. J., Brugger J. Love is
in the Earth: A review of tellurium (bio)geochemistry in surface environments. Earth-Science Reviews, vol. 204,
pp. 103–150, 2020. (In Eng.).
16. Kondratieva L. A., Anisimova G. S., Kardashevskaia V. N. Types of Tellurium Mineralization of Gold
Deposits of the Aldan Shield (Southern Yakutia, Russia). Minerals, vol. 11, pp. 698, 2021. Web. 21.02.2023.
https://doi.org/10.3390/min11070698 (In Eng.).
17. Kalinin A. A. Tellurium and Selenium Mineralogy of Gold Deposits in Northern Fennoscandia. Minerals,
vol. 11, pp. 574–577, 2021. (In Eng.).
18. Kampf A. R., Housley R. M., Mills S. J., Marty J., Thorne B. American Mineralogist, vol. 95, no. 8/9,
pp. 1329–1336, 2010. (In Eng.).
19. Kampf A. R., Mills S. J., Housley R. M., Marty J., Thorne B. Lead-tellurium oxysalts from Otto
Mountain near Baker, California: IV. Markcooperite, Pb(UO2)Te6+O6, the first natural uranyl tellurate. American
Mineralogist, vol. 95, pp. 1554–1559, 2010. (In Eng.).
20. Pekov I. V. Minerals first discovered on the territory of the Soviet Union. Moscow: Ocean pictures,
1998. (In Eng.).
21. Xing Y., Etschmann B., Liu W., Mei Y., Shvarov Y., Testemale D., Tomkins A., Brugger J. The role of
fluorine in hydrothermal mobilization and transportation of Fe, U and REE and the formation of IOCG deposits.
Chemical Geology, vol. 504, pp. 158–176, 2019. (In Eng.). |
