Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series
Zoned plutons, composed of dunites, pyroxenites, and gabbroic rocks, have been referred to as the Ural-Alaskan type complexes (UA-complexes) and occur in numerous paleo-arc settings worldwide. Many of these complexes are source rocks for economic placers of platinum-group metals. Thus, it is importa...
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MDPI AG
2023-01-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/1/126 |
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| author | Ivan F. Chayka Nikolay I. Baykov Vadim S. Kamenetsky Anton V. Kutyrev Evgenii V. Pushkarev Adam Abersteiner Vasily D. Shcherbakov |
| author_facet | Ivan F. Chayka Nikolay I. Baykov Vadim S. Kamenetsky Anton V. Kutyrev Evgenii V. Pushkarev Adam Abersteiner Vasily D. Shcherbakov |
| author_sort | Ivan F. Chayka |
| collection | DOAJ |
| description | Zoned plutons, composed of dunites, pyroxenites, and gabbroic rocks, have been referred to as the Ural-Alaskan type complexes (UA-complexes) and occur in numerous paleo-arc settings worldwide. Many of these complexes are source rocks for economic placers of platinum-group metals. Thus, it is important to understand how UA-complexes form and the origin and behavior of platinum-group elements (PGEs). It is widely assumed that the UA-complexes result from differentiation of supra-subduction high-Ca high-Mg sub-alkaline magmas. However, there is a lack of direct evidence for the existence and differentiation of such magmas, mainly because cases of UA-complexes being spatially and temporally linked to co-genetic volcanics are unknown. We studied an UA-complex from the Tumrok range (Eastern Kamchatka) where a dunite-clinopyroxenite-gabbro assemblage is spatially and temporary related to high-Ca volcanics (i.e., picrites and basalts). Based on the mineral and chemical composition of the rocks, mineral chemistry, and composition of melt inclusions hosted within rock-forming minerals, we conclude that the intrusive assemblage and the volcanics are co-genetic and share the same parental magma of ankaramitic composition. Furthermore, the compositions of the plutonic rocks are typical of UA-complexes worldwide. Finally, the rocks studied exhibit a full differentiation sequence from olivine-only liquidus in picrites and dunites to eutectic crystallization of diopside or hornblende, plagioclase, and K-Na feldspar in plagio-wehrlites and gabbroic rocks. All these results make the considered volcano–plutonic complex a promising case for petrological studies and modelling of UA-complex formation. |
| first_indexed | 2024-03-09T11:36:57Z |
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| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T11:36:57Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Minerals |
| spelling | doaj.art-5e73e74d7da148118a8cee514e14788b2023-11-30T23:40:09ZengMDPI AGMinerals2075-163X2023-01-0113112610.3390/min13010126Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic SeriesIvan F. Chayka0Nikolay I. Baykov1Vadim S. Kamenetsky2Anton V. Kutyrev3Evgenii V. Pushkarev4Adam Abersteiner5Vasily D. Shcherbakov6Korzhinskii Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, RussiaKorzhinskii Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, RussiaKorzhinskii Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, RussiaDepartment of Earth Sciences, University of Oregon, Eugene, OR 97403, USAZavaritsky Institute of Geology and Geochemistry, Ural Branch of Russian Academy of Sciences, 620016 Yekaterinburg, RussiaInstitute of Sustainability, Energy and Resources (ISER), The University of Adelaide, Adelaide 5005, AustraliaGeological Department, Moscow State University, 119991 Moscow, RussiaZoned plutons, composed of dunites, pyroxenites, and gabbroic rocks, have been referred to as the Ural-Alaskan type complexes (UA-complexes) and occur in numerous paleo-arc settings worldwide. Many of these complexes are source rocks for economic placers of platinum-group metals. Thus, it is important to understand how UA-complexes form and the origin and behavior of platinum-group elements (PGEs). It is widely assumed that the UA-complexes result from differentiation of supra-subduction high-Ca high-Mg sub-alkaline magmas. However, there is a lack of direct evidence for the existence and differentiation of such magmas, mainly because cases of UA-complexes being spatially and temporally linked to co-genetic volcanics are unknown. We studied an UA-complex from the Tumrok range (Eastern Kamchatka) where a dunite-clinopyroxenite-gabbro assemblage is spatially and temporary related to high-Ca volcanics (i.e., picrites and basalts). Based on the mineral and chemical composition of the rocks, mineral chemistry, and composition of melt inclusions hosted within rock-forming minerals, we conclude that the intrusive assemblage and the volcanics are co-genetic and share the same parental magma of ankaramitic composition. Furthermore, the compositions of the plutonic rocks are typical of UA-complexes worldwide. Finally, the rocks studied exhibit a full differentiation sequence from olivine-only liquidus in picrites and dunites to eutectic crystallization of diopside or hornblende, plagioclase, and K-Na feldspar in plagio-wehrlites and gabbroic rocks. All these results make the considered volcano–plutonic complex a promising case for petrological studies and modelling of UA-complex formation.https://www.mdpi.com/2075-163X/13/1/126Ural-Alaskan type complexankaramitepicritebasaltwehrliteEastern Kamchatka |
| spellingShingle | Ivan F. Chayka Nikolay I. Baykov Vadim S. Kamenetsky Anton V. Kutyrev Evgenii V. Pushkarev Adam Abersteiner Vasily D. Shcherbakov Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series Minerals Ural-Alaskan type complex ankaramite picrite basalt wehrlite Eastern Kamchatka |
| title | Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series |
| title_full | Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series |
| title_fullStr | Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series |
| title_full_unstemmed | Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series |
| title_short | Volcano–Plutonic Complex of the Tumrok Range (Eastern Kamchatka): An Example of the Ural-Alaskan Type Intrusion and Related Volcanic Series |
| title_sort | volcano plutonic complex of the tumrok range eastern kamchatka an example of the ural alaskan type intrusion and related volcanic series |
| topic | Ural-Alaskan type complex ankaramite picrite basalt wehrlite Eastern Kamchatka |
| url | https://www.mdpi.com/2075-163X/13/1/126 |
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