Mantle heterogeneities beneath the Northeast Indian Ocean as sampled by intra-plate volcanism at Christmas Island
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- 作者：Rajat Tanejaa ; taneja.rajat3@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Tracy Rushmera ; Janne Blichert-Toftb ; Simon Turnera ; Craig O'Neilla
- 关键词：DUPAL anomaly ; Seamounts ; Mid-oceanic ridge ; Petit-spot volcanism ; Indian Ocean
- 刊名：Lithos
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：262
- 期：Complete
- 页码：561-575
- 全文大小：3292 K
文摘
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Christmas Island in the Indian Ocean contains basalts and trachytes.
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Geochemical & isotopic analyses of these rocks document heterogeneities within the upper mantle.
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The LVS exhibits an enriched mantle (EM-2) type end member composition.
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The UVS is a product of plate flexure produced on the outer rise of the flexed oceanic lithosphere.
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The UVS has EM-2 signature suggesting older composition is still present.