Rejuvenation of the lithosphere by the Hawaiian plume

Xueqing Li, Rainer Kind (), Xiaohui Yuan, Ingo Wölbern and Winfried Hanka
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Xueqing Li: GeoForschungsZentrum Potsdam, Telegrafenberg
Rainer Kind: GeoForschungsZentrum Potsdam, Telegrafenberg
Xiaohui Yuan: GeoForschungsZentrum Potsdam, Telegrafenberg
Ingo Wölbern: GeoForschungsZentrum Potsdam, Telegrafenberg
Winfried Hanka: GeoForschungsZentrum Potsdam, Telegrafenberg

Nature, 2004, vol. 427, issue 6977, 827-829

Abstract: Abstract The volcanism responsible for creating the chain of the Hawaiian islands and seamounts is believed to mark the passage of the oceanic lithosphere over a mantle plume1,2. In this picture hot material rises from great depth within a fixed narrow conduit to the surface, penetrating the moving lithosphere3. Although a number of models describe possible plume–lithosphere interactions4, seismic imaging techniques have not had sufficient resolution to distinguish between them. Here we apply the S-wave ‘receiver function’ technique to data of three permanent seismic broadband stations on the Hawaiian islands, to map the thickness of the underlying lithosphere. We find that under Big Island the lithosphere is 100–110 km thick, as expected for an oceanic plate 90–100 million years old that is not modified by a plume. But the lithosphere thins gradually along the island chain to about 50–60 km below Kauai. The width of the thinning is about 300 km. In this zone, well within the larger-scale topographic swell, we infer that the rejuvenation model5 (where the plume thins the lithosphere) is operative; however, the larger-scale topographic swell is probably supported dynamically.

Date: 2004
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DOI: 10.1038/nature02349

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