Journal Article10.1029/JB083IB03P01206
Lithospheric flexure and uplifted atolls
Marcia McNutt,Henry W. Menard +1 more
229
TL;DR: In this paper, the authors model the oceanic lithosphere as an elastic plate overlying a fluid asthenosphere and bracket the effective flexural rigidity of the oceans lithosphere between 1.7 and 2.5 × 1022 N m.
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Abstract: Contrary to the expectation that islands should monotonicalIy sink as the aging sea floor thermally contracts, some atolls that were formerly at sea level are now elevated as much as 70 m. A eustatic sea level high cannot explain the magnitude of the larger uplifts or the simultaneous occurrence of elevated and sea level atolls. The observation that recently active volcanoes are found near these raised atolls suggests that they have been tectonically uplifted by the loading effect of the volcanoes. By modeling the oceanic lithosphere as an elastic plate overlying a fluid asthenosphere we can both explain the varying amounts of elevation and bracket the effective flexural rigidity of the oceanic lithosphere between 1.7 and 2.5 ×1022 N m.
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Gravity Anomalies and Flexure of the Lithosphere along the Hawaiian-Emperor Seamount Chain
Anthony Watts,James R. Cochran +1 more
TL;DR: In this paper, simple models for the flexure of the lithosphere caused by the load of the Hawaiian-Emperor Seamount Chain have been determined for different values of the effective flexural rigidity.