Origin of temporal compositional trends in monogenetic vent eruptions: Insights from the crystal cargo in the Papoose Canyon sequence, Big Pine Volcanic Field, CA
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- 作者：Ruohan Gao ; ruohangao@utexas.edu" class="auth_mail" title="E-mail the corresponding author ; John C. Lassiter ; Gabrielle Ramirez1
- 关键词：monogenetic vent ; crustal contamination ; crystal cargo ; geochemistry
- 刊名：Earth and Planetary Science Letters
- 出版年：2017
- 出版时间：1 January 2017
- 年：2017
- 卷：457
- 期：Complete
- 页码：227-237
- 全文大小：1687 K
文摘
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“Primitive” basalts from the Papoose Canyon vent contain evolved and enriched “crystal cargo”.
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The temporal compositional trends most likely reflect varying degrees of crustal assimilation.
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A deflating sills model is proposed to explain the temporal trends.
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Crustal signatures may be obscured within bulk lava but recorded in melt “crystal cargo”.
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Evidence of pre-eruptive magma ponding may have implications for monitoring monogenetic volcanoes.