GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA)
Native gold and garnets are described for the first time in heavy concentrates from coarse-grained sediments of the Upper Devonian Tayaokuyakha Formation, which occurs on the eroded Upper Riphean schists with angular and azimuthal unconformity (middle reaches of the Murseyakha River, Kanin Peninsula...
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South Urals Federal Research Center of Mineralogy and Geoecology UB RAS
2022-12-01
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| Series: | Минералогия |
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| Online Access: | https://journal.mineralogy.ru/wp-content/uploads/2022/12/2022_8_4_6.pdf |
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| author | M.A. Pavlova D.A. Varlamov S.M. Snigirevsky D.V. Zarkhidze S.V. Petrov M.A. Rassomakhin |
| author_facet | M.A. Pavlova D.A. Varlamov S.M. Snigirevsky D.V. Zarkhidze S.V. Petrov M.A. Rassomakhin |
| author_sort | M.A. Pavlova |
| collection | DOAJ |
| description | Native gold and garnets are described for the first time in heavy concentrates from coarse-grained sediments of the Upper Devonian Tayaokuyakha Formation, which occurs on the eroded Upper Riphean schists with angular and azimuthal unconformity (middle reaches of the Murseyakha River, Kanin Peninsula, Nenets autonomous district, Russia). Particular attention was paid to indicators of primary source of native gold for the Upper Devonian conglomerates. The composition of weakly rounded almandine-spessartine garnets indicates their metamorphic origin and allows us to relate the primary source of native gold in conglomerates (D3tk) with underlying metamorphosed Riphean strata or intrusive rocks in them. Native gold is mainly characterized by a heterogeneous composition and contains Ag, Cu and Hg. The poorly rounded native gold grains, the absence of supergene rims and preservation of mineral inclusions in the margins indicate its proximal primary source. The presence of Cu suggests a link of native gold with mafic/ultramafic rocks: metamorphosed dikes of dolerites of the Nekhaiteyakha metagabbroid complex (mνβRF3) or dolerite dikes of the Kanin-Timan complex (βD3kt), which intrude the Precambrian metamorphic schists. It is established that the Devonian conglomerates are intermediate reservoirs for the possible present-day placer formation. |
| format | Article |
| id | doaj-art-40ca5f50fe7c47ee912a90c6146735ed |
| institution | Kabale University |
| issn | 2313-545X 2782-2044 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | South Urals Federal Research Center of Mineralogy and Geoecology UB RAS |
| record_format | Article |
| series | Минералогия |
| spelling | doaj-art-40ca5f50fe7c47ee912a90c6146735ed2025-02-10T11:45:02ZengSouth Urals Federal Research Center of Mineralogy and Geoecology UB RASМинералогия2313-545X2782-20442022-12-01849410910.35597/2313-545X-2022-8-4-6GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA)M.A. Pavlova0D.A. Varlamov1S.M. Snigirevsky2D.V. Zarkhidze3S.V. Petrov4M.A. Rassomakhin5South Urals Federal Research Center of Mineralogy and Geoecology UB RASInstitute of Experimental Mineralogy RASSt. Petersburg State UniversityRussian Geological Research InstituteSt. Petersburg State UniversitySouth Urals Federal Research Center of Mineralogy and Geoecology UB RASNative gold and garnets are described for the first time in heavy concentrates from coarse-grained sediments of the Upper Devonian Tayaokuyakha Formation, which occurs on the eroded Upper Riphean schists with angular and azimuthal unconformity (middle reaches of the Murseyakha River, Kanin Peninsula, Nenets autonomous district, Russia). Particular attention was paid to indicators of primary source of native gold for the Upper Devonian conglomerates. The composition of weakly rounded almandine-spessartine garnets indicates their metamorphic origin and allows us to relate the primary source of native gold in conglomerates (D3tk) with underlying metamorphosed Riphean strata or intrusive rocks in them. Native gold is mainly characterized by a heterogeneous composition and contains Ag, Cu and Hg. The poorly rounded native gold grains, the absence of supergene rims and preservation of mineral inclusions in the margins indicate its proximal primary source. The presence of Cu suggests a link of native gold with mafic/ultramafic rocks: metamorphosed dikes of dolerites of the Nekhaiteyakha metagabbroid complex (mνβRF3) or dolerite dikes of the Kanin-Timan complex (βD3kt), which intrude the Precambrian metamorphic schists. It is established that the Devonian conglomerates are intermediate reservoirs for the possible present-day placer formation.https://journal.mineralogy.ru/wp-content/uploads/2022/12/2022_8_4_6.pdfnative goldgarnetbasal conglomeratesintermediate reservoirs |
| spellingShingle | M.A. Pavlova D.A. Varlamov S.M. Snigirevsky D.V. Zarkhidze S.V. Petrov M.A. Rassomakhin GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) Минералогия native gold garnet basal conglomerates intermediate reservoirs |
| title | GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) |
| title_full | GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) |
| title_fullStr | GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) |
| title_full_unstemmed | GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) |
| title_short | GOLD POTENTIAL OF THE UPPER DEVONIAN BASAL CONGLOMERATES OF THE KANIN PENINSULA (NENETS AUTONOMOUS DISTRICT, RUSSIA) |
| title_sort | gold potential of the upper devonian basal conglomerates of the kanin peninsula nenets autonomous district russia |
| topic | native gold garnet basal conglomerates intermediate reservoirs |
| url | https://journal.mineralogy.ru/wp-content/uploads/2022/12/2022_8_4_6.pdf |
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