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| Von Huene, R; Uyeda, S. |
| Investigations of convergent margins along the IPOD transects support the concept of ocean floor spreading in back-arc basins and the concept of tectonically accreted sediment at the front of convergent margins. However, not all convergent margins have large accreted complexes, and other less frequently used concepts are required in the interpretations of these convergent margins. If the present rates of plate convergence are accepted, then much sediment that entered the trenches studied is presumably subducted rather than accreted. In some instances, the continental framework is truncated and somehow removed by tectonic erosion. Some convergent margins have subsided significantly during subduction. The crust above the Benioff zone appears to have been... |
| Tipo: Text |
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| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00245/35659/34168.pdf |
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| Lanseth, M G; Von Huene, R; Nasu, N; Okada, H. |
| DSDP drilling results showed that at site 439 the Sanriku Shelf of Northeastern Honshu has subsided nearly 3,000 m during the Neogene. Integrating these results with seismic-reflection data indicates widespread subsidence that is locally as great as 6,000 m. The authors propose that this subsidence resulted from the initiation of subduction of Mesozoic lithosphere at the Sanriku Margin beginning 25-30 m.y.b.p. Temporal cooling of the mantle below the forearc area caused contraction and subsidence; a simple model is presented to estimate the rate. |
| Tipo: Text |
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| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00246/35686/34194.pdf |
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