Adakites and adakitic melts: Compositions of rocks, quenched glasses, and inclusions in minerals
- 作者: Tolstykh M.1, Naumov V.1, Yarmolyuk V.2
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隶属关系:
- Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
- Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
- 期: 卷 25, 编号 3 (2017)
- 页面: 304-317
- 栏目: Article
- URL: https://journals.rcsi.science/0869-5911/article/view/177521
- DOI: https://doi.org/10.1134/S0869591117020059
- ID: 177521
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详细
Data set of rocks and glasses whose compositions correspond to the term “adakite” (SiO2 > 56 wt %, Sr > 400 ppm, Sr/Y > 18) was compiled from two large geochemical data bases. It was revealed that the adakitic melts are characterized by extremely low abundance as compared to adakitic rocks. Only 50 adakitic compositions (~0.5%) were identified in the data base that includes the major and trace element compositions of over 9700 quenched and melt inclusion glasses. It was established that only 22 of selected analyses characterize melt inclusion glasses, while other analyses represent residual glass or “pocket melts” in ultramafic mantle xenoliths. The question of a genetic relationship between adakitic rocks, adakitic melts, and melting of subsiding plate remains open. Original data on the Shiveluch volcanic center (Kamchatka) were used to demonstrate the formation of adakitic signatures through mineral accumulation.
作者简介
M. Tolstykh
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
编辑信件的主要联系方式.
Email: mashtol@mail.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991
V. Naumov
Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI)
Email: mashtol@mail.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991
V. Yarmolyuk
Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (IGEM)
Email: mashtol@mail.ru
俄罗斯联邦, Staromonetnyi per. 35, Moscow, 119017