Chemical composition of melts of the Early Eocene volcanic center at Cape Khairyuzova, western Kamchatka: Evidence from inclusions in minerals
- Авторлар: Kovalenko D.1, Naumov V.2, Prokofiev V.1, Ageeva O.1, Andreeva O.1, Kovaltchuk E.1, Erofeeva K.1, Ugryumova N.1
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Мекемелер:
- Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
- Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
- Шығарылым: Том 25, № 1 (2017)
- Беттер: 66-86
- Бөлім: Article
- URL: https://journals.rcsi.science/0869-5911/article/view/177496
- DOI: https://doi.org/10.1134/S0869591117010052
- ID: 177496
Дәйексөз келтіру
Аннотация
Original authors’ data on the mineralogy and composition of melt inclusions in two samples show that the Early Eocene magmatic rocks at Cape Khairyuzova were formed by mixing melts of mafic, intermediate, and acid composition, which were derived from different sources. The mafic melt was rich in MgO, and its temperature was 1100–1150°C. The temperature of the acid melt varied from 1070 to 1130°C. The melts are also different in concentrations of trace elements and in their ratios. All three melt types are enriched in LILE and LREE and depleted in HFSE and were likely derived in suprasubductional environments. The mafic and intermediate magmas were formed by melting a mantle wedge and subsequent fractionation of the melts. The acid melts could be formed by melting crustal rocks when they were overheated in the newly formed orogen of significant thickness. When ascending, the mantle melts could mix in variable proportions with acid melts in crustal chambers.
Авторлар туралы
D. Kovalenko
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Хат алмасуға жауапты Автор.
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
V. Naumov
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: dmitry@igem.ru
Ресей, ul. Kosygina 19, Moscow, 119991
V. Prokofiev
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
O. Ageeva
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
O. Andreeva
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
E. Kovaltchuk
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
K. Erofeeva
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017
N. Ugryumova
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: dmitry@igem.ru
Ресей, Staromonetny per. 35, Moscow, 119017