Do mantle plumes preserve the heterogeneous structure of their deep-mantle source?
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- 作者：T.D. Jonesa ; tim.jones@anu.edu.au" class="auth_mail" title="E-mail the corresponding author ; D.R. Daviesa ; I.H. Campbella ; C.R. Wilsonb ; S.C. Kramerc
- 关键词：mantle plumes ; hotspot volcanism ; LLSVPs ; Hawaii ; mantle structure and dynamics ; thermochemical convection
- 刊名：Earth and Planetary Science Letters
- 出版年：2016
- 出版时间：15 January 2016
- 年：2016
- 卷：434
- 期：Complete
- 页码：10-17
- 全文大小：1823 K
文摘
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We simulate thermo-chemical plumes across a wide parameter-space, in 2-D and 3-D.
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Two conduit regimes emerge: (i) bilaterally asymmetric; and (ii) concentric.
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Bilateral: occurs over a limited parameter-space and preserves deep-mantle structure.
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Concentric: dominates parameter-space but does not preserve deep-mantle structure.
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Conclusion: deep-mantle structure may not be preserved during plume ascent.