High-alumina basalts from the Bogda Mountains suggest an arc setting for Chinese Northern Tianshan during the Late Carboniferous
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- 作者：Wei Xiea ; Yi-Gang Xua ; yigangxu@gig.ac.cn" class="auth_mail" title="E-mail the corresponding author ; Yi-Bing Chena ; Zhen-Yu Luoa ; Lu-Bing Honga ; Liang Maa ; Hai-Quan Liub
- 关键词：High-alumina basalt ; Bogda Mountains ; Arc setting ; Late Carboniferous ; Chinese Northern Tianshan
- 刊名：Lithos
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：256-257
- 期：Complete
- 页码：165-181
- 全文大小：4147 K
文摘
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Precise zircon SHRIMP U–Pb dating suggests that the Bogda high-alumina basaltic lavas were erupted at 315–319 Ma.
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High Al content of the Bogda basalt is due to high crystallization pressure rather than water content.
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The sector and oscillatory zoning in Cpx phenocrysts is attributable to rapid dynamic crystallization during magma ascent.
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The occurrence of the Bogda HABs suggests an island arc environment in the Late Carboniferous.
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