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A new type of active margin: The convergent-extensional margin, as exemplified by the Middle America Trench of Guatemala
Aubouin, J.; Bourgois, J.; Azéma, J. (1984). A new type of active margin: The convergent-extensional margin, as exemplified by the Middle America Trench of Guatemala. Earth Planet. Sci. Lett. 67(2): 211-218
In: Earth and Planetary Science Letters. Elsevier: Amsterdam. ISSN 0012-821X, more
Peer reviewed article  

Available in  Authors 

Keywords
    Active margins; Subduction zones; Tectonics; ISE, Middle America Trench [Marine Regions]; Marine

Authors  Top 
  • Aubouin, J.
  • Bourgois, J.
  • Azéma, J.

Abstract
    The results of DSDP Legs 67 and 84, during which a transect of holes was drilled across the Middle America Trench off Guatemala, show no accretion at the front of that subduction zone since early Eocene time. The tectonic evolution of the trench includes extensional structure on the landward as well as the seaward trench slopes. The Guatemalan margin is proposed as the model of a new type of active margin, the convergent-extensional active margin (CE margin).

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