Peculiarities of geological-structural position, composition and origin of the silver-bearing ores of the Cobalt-Gowganda area (Canadian Shield)

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Authors:

V.M.Guliy, Dr. Sc. (Geol.-Min.), Prof., orcid.org/0000-0002-7127-7045, Ivan Franko National University of Lviv, Lviv, Ukrain, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

O.V.Kostyuk, Cand. Sc. (Geol.), orcid.org/0000-0003-2218-1757, Ivan Franko National University of Lviv, Lviv, Ukrain, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract:

Purpose. Obtaining new and generalizing previously published results of research studies on geological and structural situation, mineralogical and petrographic compositions and formation peculiarities of ores from deposits of five element formation the Cobalt-Gowganda region (Canada), and comparing it to similar deposits from other world areas.

Methodology. The researchincluded traditional geological observations with collecting samples of various hosting rocks and ores, mineralogical and petrographic analysis of thin sections and polishes samples with ontogeny modeling of minerals formation and detection of their separate generations, determination of rocks and minerals chemical composition along with measuring their reflective power and thermo electro-motive force of sulfides. Isotopic analysis of carbon and oxygen in carbonates from the deposits has been used for genetic constructions.

Findings. The results obtainedduring investigations of regional geology, setting of the ore beds, mineral composition of the ores allow connecting ore mineralization formation in the Cobalt-Gowganda region with the main stages of geological development of the Abitibi greenstone belt, formation of fault systems of different order and cracks, which have promoted circulation of ore-bearing solutions enriched by different components from hosting rocks. Presence of various minerals in concrete places of ores is defined by chemical composition and structure of the initial hosting rocks.

Originality. Joint characteristic of the deposit model for five element formation in the Cobalt-Gowganda region involving different generations of the ore minerals is developed. They are characterized by various physical properties and data on isotopic composition of the carbon and oxygen from the carbonates, which differentiates them from carbonates of other genetic types.

Practical value. It is determined by obtained characteristics of the model silver deposits and their minerals of different associations, which help to estimate possible findings of the similar objects in analogical complexes of the Ukrainian Shield and surrounding territory.

References.

1.Joyce, D.K., Tait, K., Vertoli, V., Back, M. and Nicklin, I., 2012. The Cobalt Mining District, Cobalt, Ontario, Canada.Mineralogical Record, 43(6), pp. 685‒713.

2.Nechaev, S.V. and Syomka, V.O., 2012. Ore-bearing metasomatites of central part of the Ukrainian Shield (prognostic, prospecting and general geological significance). Geochemistry and ore formation [pdf], 31‒32, pp. 12–23. Available at: <http://igmof.org.ua/sites/default/files/4_3.pdf> [Accessed 22 September 2017].

3.Nechaev, S.V., 2011. Silver and gold of the Perga ore hub. Geologist of Ukraine, 1(33), рр. 90–104.

4.Duplessis, C., Takara Resources Inc., 2015. Castle Silver Property, Gowganda, Ontario, Canada. Technical Report NI 43‒101 dated July 9th 2015 for Takara Resources Inc. & Gold Bullion Development Corporation incompliance with № 43‒101 and Form 43‒101 F1 [pdf]. Available at: <http://www.nisa.net/takara/TakaraCastlesilverminestechreport2015_0709.pdf> [Accessed 5 August 2017].

5.Nankamba, P. and Burden, L.D., 2016. 43-101F1 Technical Report Aldershot Resources Ltd., Haultain Property, Haultain, Nicol, Milnerand Van Hise Townships, Ontario (NTS 41P10) [pdf]. Available at: <http://www.aldershotresources.com/wp-content/uploads/2016/11/ALZ-tech-report-1116.pdf> [Accessed 17 November 2017].

6.Verkhovtsev, V.H. and Yuskiv, Yu.V., 2016. Рrospecting points of studying geostructures of the Ukrainian Shield and its slopes which are active at the latest stage development. Ukrainian Journal of Remote Sensing, 8, рр. 40–50.

7.Коvalchuk, M.S., Kroshko, Yu.V. and Shestakov, O.Yu., 2016. Gold, silver and copper in the weathering crust of the Yuriivske gold deposit (Kyrovohradskyi Block, Ukraine. Heolohiia ta rudonosnist Ukrainy, 1(2), рр. 17‒24.

8. Dahlkamp, F.J., 2016. Uranium Deposits of the World. Europe. Berlin, Heidelberg: Springer-Verlag Europe.

9. Breiter, K., 2014. 800 years of mining activity and 450 years of geological research in the Krušné Hory. Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, Erzgebirge Mountains Central Europe, 9(1), рр. 105‒134.

10.Burisch, M., Gerdes, A., Walter, B., Neumann, U., Fettel, M. and Markl, G., 2017. Methane and the origin of five-element veins: Mineralogy, age, fluid inclusion chemistry and ore forming processes in the Odenwald, SW Germany. Ore Geology Reviews, 81(1), рр. 42‒61.

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