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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 63 (1979)

Issue: 3. (March)

First Page: 546

Last Page: 547

Title: IPOD Drilling on Convergent Ocean Margins: ABSTRACT

Author(s): Roland Von Huene

Article Type: Meeting abstract


End_Page 546------------------------------

Active ocean margins have been drilled by the Glomar Challenger to test the conceptual subduction-accretion model of convergent-plate tectonism. In this model, subduction results in accretion of oceanic and trench sediment to the margin and a general buildup of the upper plate. The results of pre-IPOD drilling confirmed some general aspects of the model such as compressional strain, folding, deformation of young sediment, and periods of arc volcanism. However, the results of IPOD drilling along the Japan and Mariana Trench transects indicate that much of the oceanic sediment is subducted rather than accreted if the rates of convergence derived from global considerations are assumed. Off Japan, massive subsidence of the outer continental shelf during subduction suggests some erosion an disposal of the leading edge of the upper plate. Thus the conceptual subduction-accretion model cannot be applied in these two areas without major modification.

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Copyright 1997 American Association of Petroleum Geologists