The Ashes of 2017 from the Klyuchevskoy and Kambalnyy Volcanoes: A Comparative Mineralogical-Geochemical Analysis

V. I. Silaev, G. A. Karpov, D. V. Kiseleva, L. P. Vergasova, B. A. Makeev, K. V. Tarasov, A. F. Khazov

Abstract


The results of the mineralogical and geochemical study of the ash of the Klyuchevskoy and Kambalnyy volcanoes located in different geological conditions (Klyuchevskoy – Central Kamchatskaya Depression, Kambalnyy - Southeast end Eastern Kamchatka Volcanic Ridge) were obtained in 2017, and allowed making following conclusions. The investigated ashes differ somewhat in chemical composition: the Klyuchevskoy volcano ash is close to andesibasalts, but that from Kambalnyy is close to andesites. According to the normative-mineral composition, they are composed of 65–87% basic plagioclases, 3–22% quartz, 6.5–14% Mg-Fe-Ca silicates (olivine, pyroxene, probably hornblende). In this case, the ashes from the volcano Kambalnyy are characterized by more acidic composition of plagioclase and higher content of quartz.  The accessory minerals found in the ashes are presented by spinels (Ulviya magnetite, magnetite, and chromite), ilmenite, rutile, apatite, zircon, pyrite and native metallic-phase (Al, Cu, Fe). Pelitic (silty) fractions are enriched in quartz, but impoverished in Mg-Fe-Ca silicates. As a small admixture in the ash of the Cumulus volcano, titanite, andradite, kaolinite and gypsum are inherently resurgent. The fact of detecting the filamentous forms of abiogenic condensed organopolymer substance of CNO composition in the investigated ashes is of particular importance. It should be noted that, according to the isotope composition of carbon, these formations are identical to similar threads and particles identified in products of modern volcanism in the Kamchatka-Philippine island arc megabelt. Moreover, the analysis showed the presence in the ashes of the Kliuchevskoy and Kambalnyy volcanoes of the carbon substance, which carbon isotopic composition practically coincides with that in the organic filaments. Ashes contain 50 microelements divided into five groups: alkaline and alkaline earth, hydrolyzed, lanthanides, chalcoceridophiles, semi- and non-metals. The analysis leads to the conclusion that the predominantly plagioclase containing ash from both volcanoes show a 75% geochemical similarity to the deep source matter. According to the shape of the curves of chondritotropic concentrations of lanthanides, the ashes from both volcanoes are close to the basaltic lavas of TTI-50. The insignificance of the Eu anomaly on the most curves and the apparent moderate differentiation of the lanthanides indicate that the fractionation of plagioclases in the primary melts and the significant realization of the fractionation of olivine and pyroxenes are weak. Based on the granulometric and morphological homogeneity of particles and the presence of a significant content of fresh volcanic glass in ash from both volcanoes, it can be assumed that in both cases the ashes were predominantly or largely melt-formed, and primarily associated with deep magmatic chambers. It is supposed that the process of slow rise of magmatic melts with their fractionation and gravitational stratification into the lower Mg-Fe-silicate and upper aluminosilicate parts took place. Last eruption of the aluminosilicate substrate occurred in the ash form. Because of the viscosity and tendency to quick solidification, aluminum silicate magmatic magma plugged the channel thus preventing the eruption of the lava Hawaiian type.

Keywords


volcanoes; Klyuchevskoy; Kambalnyy; ash; chemical and mineral composition; impurity elements; abiogenic organopolymers

References


Anikin L.P., Vergasova L.P., Maksimov A.P. et al. 2011. Peply izverzheniya Koryakskogo vulkana v 2009 g. [The ashes of the Koryakskiy volcano 2009 eruption]. In: Vulkanizm i svyazannye s nim protsessy. Petropavlovsk-Kamchatskiy: IViS DVO RAN, pp. 10–13. (in Russian)

Anikin L.P., Silaev V.I., Chubarov V.M., Petrovskiy V.A., Vergasova G.A., Sokorenko A.V., Ovsyannikov A.A., Maksimov A.P. 2018. Almaz i drugie aktsessornye mineraly v produktakh izverzheniya 2008–2009 gg. Koryakskogo vulkana (Kamchatka) [Diamond and other accessory minerals in the 2008-2009 eruption products of the Koryak volcano (Kamchatka)]. Vestnik IG Komi NC UrO RAN. 2:18–27. (in Russian)

Basharina L.A. 1959. Vodnye vytyazhki pepla i gazy peplovoy tuchi vulkana Bezymyannogo [Water extracts of ash and gases from ash cloud of the Bezymyannyy volcano]. Bulleten vulkanologicheskikh stantsiy. 27:38–42. (in Russian)

Volynets A.O., Melnikov D.V., Yakushev A.I. 2013. Pervye dannye o sostave produktov Treshchinnogo Tolbachinskogo izverzheniya im. 50-letiya IViS (Kamchatka) [The first data on the composition of the products of the Fissure Tolbachinsky eruption named after. 50th Anniversary of IViS (Kamchatka)]. Doklady RAN. 452(3):303–307. (in Russian)

Girina O.A., Melnikov D.V., Manevich A.G., Nuzhdaev A.A. 2017. Izverzhenie vulkana Kambalnyy v 2017 [The eruption of the Kambalnyy volcano in 2017]. Sovremennye problemy distancionnogo zondirovaniya Zemli iz kosmosa. 14(2):263–267. (in Russian)

Gontovaya L I., Popruzhenko S.V., Nizkous I.V. 2010. Struktura verkhney mantii zony perekhoda okean-kontinent v rayone Kamchatki [Structure of the upper mantle of the ocean-continent transition zone in the Kamchatka region]. Vulkanologiya i sejsmologiya. 1:3–35. (in Russian)

Gontovaya A I., Silaev V.I., Vergasova L.P. et al. 2017. K voprosu o glubinnosti istochnika flyuido-magmaticheskogo veshchestva pod Tolbachikom i Klyuchevskim vulkanami [On the depth of the fluid-magmatic substance source under Tolbachik and Kliuchevskoy Volcanoes]. In: Vulkanizm i svyazannye s nim processy. Materialy XX ezhegodnoy nauchnoy konferentsii vulkanologov. Petropavlovsk-Kamchatskiy, IViS, pp. 22–25. (in Russian)

Karpov G.A., Silaev V.I., Anikin L.P. et al. 2014. Almazy i soputstvuyushchie mineraly v produktakh Treshchinnogo Tolbachinskogo izverzheniya 2012–2013 gg. [Diamonds and associated minerals in the products of the Fissure Tolbachinskiy Eruption 2012-2013]. Vulkanologiya i sejsmologiya. 6:3–20. (in Russian)

Karpov G.A., Silaev V.I., Anikin L.P. et al. 2017. Vulkanogennyy uglerodnyy paragenezis na Kamchatke [Volcanogenic carbon paragenesis in Kamchatka]. Istoriya nauki i tekhniki. 7: 66–77. (in Russian)

Litasov N.E., Vazheevskaya A.A. 1991. Vulkan Kambalnyy: nauchnoe izdanie [Kumbalny volcano: a scientific publication]. In: Deystvuyushchie vulkany Kamchatki, T. 2, Moskva, Nauka, pp. 396–405. (in Russian)

Rudich K.N. 1978. Vulkan Kambalnyy [Kambalniy Vulcano]. In: Kamennye fakely Kamchatki. Novosibirsk, Nauka, pp. 111–112. (in Russian)

Rychagov S.N., Sandimirova E.I., Sergeeva A.V., Nuzhdaev I.A. 2017. Sostav pepla vulkana Kambalnyy (izverzhenie 2017 g.) [Composition of the ashes of the volcano Kambalnyy (2017 eruption)]. Vestnik KRAUNC. Nauki o Zemle, 4(36):13–27. (in Russian)

Silaev V.I., Anikin L.P., Vergasova L.P. et al. 2016a. Abiogennye organicheskie polimery v produktakh sovremennogo vulkanizma [Abiogenic organic polymers in products of modern volcanism]. Vestnik Permskogo universiteta. Geologiya, 3(32):21–33. (in Russian) doi: 10.17072/psu.geol.32.21

Silaev V.I., Vergasova L.P., Vasilyev E.A. et al. 2016b. Mikroparagenezis almaza i samorodnogo alyuminiya v produktakh sovremennogo vulkanizma [Microparagenesis of diamond and native aluminum in products of modern volcanism]. Vulkanologiya i seysmologiya. 1: 71–77. (in Russian)

Silaev V.I., Karpov G.A., Anikin L.P. et al. 2017. Pervaya nakhodka prirodnogo dyuralyuminiya [The first find of natural duraluminum]. Doklady RAN. 476(1):98–101. (in Russian)

Fedotov S.A., Zharikov N.A., Gontovaya L.I. 2009. O vulkanicheskoy deyatelnosti, magmaticheskoy pitayushchey sisteme i glubinnom stroenii vulkanov Klyuchevskoy gruppy [About volcanic activity, igneous feeding system and deep structure of volcanoes of the Klyuchevskaya group]. In: Vulkanizm i geodinamika. Materialy IV Vserossiyskogo simpoziuma po vulkanologii i paleovulkanologii, T.1, Petropavlovsk-Kamchatskiy, pp. 24–27. (in Russian)

Khubunaya S.A., Gontovaya L.I., Moskaleva S.V. 2009. Petrologicheskie osobennosti andezibazaltov vershinnykh izverzheniy vulkana Klyuchevskoy i seysmicheskaya model verkhney chasti zemnoy kory (Kamchatka) [Petrologic features of andesibasalts of vertex eruptions of Klyuchevskoy volcano and seismic model of the upper part of the earth's crust (Kamchatka)]. In: Vulkanizm i geodinamika. Materialy IV Vserossiyskogo simpoziuma po vulkanologii i paleovulkanologii. Petropavlovsk-Kamchatskiy, T.1, pp. 215. (in Russian)

Ponomareva V.V., Churikova T., Melekestsev I.V., Braitseva O.A., Pevzner M., Sulerzhitsky L. 2007. Late Pleistocene-Holoctne Volcanism on the Kamchatka Peninsula, Northwest Pacific Region. In: Volcanism and Subduction: The Kamchatka Region, V. 172, Washington, D. C., Amer. Geophysical Union, pp. 165–168. doi: 10.1029/172GM15




DOI: http://dx.doi.org/10.17072/psu.geol.17.4.326

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