ACCESSORY NATIVE METALS AND ALLOYS IN IMPACT MELT ROCKS OF THE EL’GYGYTGYN CRATER, CHUKOTKA
DOI:
https://doi.org/10.15407/dopovidi2024.01.030Keywords:
native metals, impact crater El’gygytgyn, impact melt rock, gas vesicles, accessoriesAbstract
An electron microscopic study of impact melt rocks from the south and southeast regions of the El’gygytgyn impact crater revealed the presence of accessory mineralization composed of native metals and alloys. These minerals include alloys of silver, copper, tin, lead, and occasionally, their respective metals. The host impact melt rocks exhibit a vesicular structure and contain numerous fragments of C-rich clayey matter, which are situated within gas vesicles in a glassy matrix. The inner surface of this clayey matter inside gas vesicles serves as the primary substrate for the crystallization of native metals and alloys. The presumed source of these metals is an ore deposit located in the impact melting area of the target during a meteorite impact, while clayey fragments from the bottom sediments of a local lake at the target surface are considered a probable source.
Downloads
References
Gurov, E. P., Valter, A. A., Gurova, E. P. & Serebrennikov, A. I. (1978). Impact meteorite crater El’gygytgyn in Chukotka. Dokl. AN SSSR, 240, No. 6, pp. 1407-1410 (in Russian).
Feldman, V. I., Granovsky, L. B., Kapustkina, I. G., Karoteeva, N. N., Sazonova, L. V. & Dabizha, A. I. (1981). Meteorite crater El’gygytgyn. In Marakhushev, A. A. (Ed.). Impactites (pp. 70-92). Mosсow: Izd-vo Moskovsk- ogo Universiteta (in Russian).
Layer, P. V. (2000). Argon-40/Argon-39 age of the El’gygytgyn impact event, Chukotka, Russia. Meteorit. Planet. Sci., 35, pp. 591-599. https://doi.org/10.1111/j.1945-5100.2000.tb01439.x
Gurov, E. P. & Gurova, E. P. (1991). Geological structure and material composition of the rocks of impact structures. Kyiv: Naukova Dumka (in Russian).
Gurov, E. P., Koeberl, C. & Yamnichenko, A. (2007). El’gygytgyn impact crater, Russia: Structure, tectonics and morphology. Meteorit. Planet. Sci., 42, No. 3, pp. 307-319. https://doi.org/10.1111/j.1945-5100.2007.tb00235.x
Gurov, E. P., Permiakov, V. V. & Koeberl, C. (2019). Remnants of paleoflora in impact melt rocks of the El’gygytgyn crater (Chukotka, Russia). Meteorit. Planet. Sci., 54, No. 10, pp. 2532-2540. https://doi.org/10.1111/maps.13241
Gurov, E. P. & Kudinova, L. A. (1987). Native metals from the El’gygytgyn meteorite crater. Novie dannye o mineralah, Iss. 34, pp. 133-136 (in Russian).
Gurov, E. P., Shekhunova, S. B. & Permyakov, V. V. (2011). Boltysh impact structure and impact melt rocks. Geofiz. J., 33, No. 5, pp. 66-89 (in Russian).
Gurov, E. P., Shekhunova, S. B. & Permyakov, V. V. (2015). Accessory and opaque minerals in impact melt rocks of the Boltysh structure, Ukraine. Meteorit. Planet. Sci., 50, No. 6, pp. 1139-1155 https://doi.org/10.1111/maps.12457
Gurov, E. P., Shekhunova, S. B. & Permyakov, V. V. (2013, March). Accessory minerals from impact melt rocks of the Boltysh structure, Ukraine. Native metals and alloys. Proceeding of the 44th Lunar and Planetary Science Conference (# 1217), Woodlands.
Gurov, E. P., Shekhunova, S. B. & Permyakov, V. V. (2013, March). Accessory minerals from impact melt rocks of the Boltysh structure, Ukraine. Oxides: the varieties of hematite. Proceeding of the 44th Lunar and Planetary Science Conference (# 1219), Woodlands.
Gurov, E. P. & Permyakov, V. V. (2018, April). Organic matter in impact melt rocks of the Elgygytgyn crater (Chukotka, Russia). Carbon in the Solar System Workshop, Solar System exploration research, Denver.
Novgorodova, M. I., Yusupov, R. G. & Sveshnikova, E. V. (1985). Native metals and carbides from explosion tubes of alkaline basaltoids. Proceedings of the All-Union Conference Native metals in igneous rocks (Pt. 1) (pp. 12-14). Yakutsk (in Russian).
Gurov, E. P. & Permyakov, V. V. (2015). Native metals in impact melt rocks of the Boltysh impact structure. Mineral. Journ., 37, No. 4, pp. 58-67 (in Russian).
Struzhkov, S. F. & Konstantinov, M. M. (2005). Metallogeny of gold and silver of the Okhotsk-Chukotka volcanogenic belt. Moscow: Nauch. Mir (in Russian).
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 Reports of the National Academy of Sciences of Ukraine
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
