The return of subducted continental crust in Samoan lavas
Article Abstract:
The enriched [super 87]Sr/[super 86]Sr and [super 143]Nd/[super 144]Nd isotope signatures in Samoan lavas are obtained from three dredge locations on the underwater flanks of Savai'i island, Western Samoa. The geochemical evidence has redefined the composition of the EM2 mantle endmember and has shown an ancient recycled upper continental crust component in the Samoan mantle plume.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2007
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Subducted banded iron formations as a source of ultralow-velocity zones at the core-mantle boundary
Article Abstract:
Ultralow-velocity zones (ULZVs) might be relics of banded iron formations subducted to the core-mantle boundary between 2.8 and 1.8 billion years ago. These layers, as part of the ocean floor, would be recycled into the Earth's interior by subduction, sink into the bottom of the mantle and may explain all the features of ULZVs.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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Slab sliding away
Article Abstract:
A modular study is conducted to analyze the impact of the subsurface dynamics on motion of the tectonic plates present in the Earth's crust. Most of the slabs of the cold and brittle material at Earth's surface are found to slide back down in the mantle at subduction zones.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2008
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