H2O-driven generation of picritic melts in the Middle to Late Triassic Stuhini arc of the Stikine terrane, British Columbia, Canada
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- 作者：Dejan Milidragovica ; dejan.milidragovic604@gmail.com" class="auth_mail" title="E-mail the corresponding author ; John B. Chapmana ; Sebastian Bichlmaierb ; Dante Canilb ; Alex Zagorevskic
- 关键词：arc picrite ; Triassic ; Stikinia ; subduction zone
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 November 2016
- 年：2016
- 卷：454
- 期：Complete
- 页码：65-77
- 全文大小：2286 K
文摘
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Ultramafic pyroclastics are part of Upper Triassic Stuhini Group of Stikine terrane.
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The pyroclastics are olivine cumulates formed from picritic parental magma.
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Picritic magmas of Stuhini Group were rich in magmatic volatiles (5–7 wt.% H2O).
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Eruptive temperature of Stuhini Group picrites was ∼1200 °C.
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Picrites formed by melting of hydrous mantle NOT anomalously hot mantle.