Short‐lived and discontinuous intraplate volcanism in the South Pacific: Hot spots or extensional volcanism?

  title={Short‐lived and discontinuous intraplate volcanism in the South Pacific: Hot spots or extensional volcanism?},
  author={Anthony A. P. Koppers and Hubert Staudigel and Malcolm S. Pringle and Jan R. Wijbrans},
South Pacific intraplate volcanoes have been active since the Early Cretaceous. Their HIMU‐EMI‐EMII mantle sources can be traced back into the West Pacific Seamount Province (WPSP) using plate tectonic reconstructions, implying that these distinctive components are enduring features within the Earth's mantle for, at least, the last 120 Myr. These correlations are eminent on the scale of the WPSP and the South Pacific Thermal and Isotopic Anomaly (SOPITA), but the evolution of single hot spots… 

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Failure of plume theory to explain midplate volcanism in the southern Austral islands

It has long been recognized that the properties of the Cook–Austral chain (Fig. 1) of volcanoes in the South Pacific are difficult to reconcile with the theory that volcanic activity in plate

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New 40Ar/39Ar ages of mineral separates and whole rock samples from nine volcanic edifices in the northern Line Islands region, between latitudes 20°N and 6°N, are incompatible with single or

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Among Pacific hotspot tracks, the Cook-Austral island-seamount chain is distinctly anomalous in geodynamic behavior, exhibiting repetitive episodes of volcanism at multiple sites, uplift of selected

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The Darwin Rise region in the west central Pacific Ocean contains an extraordinarily large number of Cretaceous seamounts with isotopic compositions spanning a range nearly equal to that of the

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Summary. Additional evidence supports the idea that the shallow rises surrounding mid-plate, hot-spot volcanoes are caused by a broad-scale reheating of the lithosphere above hot-spots. Firstly, as

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How many Pacific hotspots are fed by deep-mantle plumes?

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