Geochemistry, Geophysics, Geosystems

Description: The Central American subduction system is characterized by abundant seismicity and a prominent volcanic arc in an erosive convergent margin setting. These processes are controlled, among other parameters, by material pathways, fluid-rock interactions and reactions from the shallower to the deeper levels of subduction. We invite studies focused on the Central American subduction system that seek to develop a better understanding of the physical conditions and processes at work in the interior of the subduction zone and along the subduction thrust interface. The goal is to better understand processes controlling the origin of natural hazards at subduction zones, in particular, earthquake nucleation and rupture. International scientific focus on the Central American subduction system has resulted in a wealth of detailed datasets that include the recent acquisition of 3D reflection seismics and drilling of IODP Expeditions 334 and 344 offshore southern Costa Rica. We seek to bring together contributions from all disciplines involved with the exploration of the Central America subduction system from the incoming plate to its arc and behind-arc magmatism, with a special focus on high-resolution offshore studies, lithospheric and crustal-scale constraints on deformation processes from geophysics, geochemistry, petrology and field-based studies.

Editors: Paola Vannucchi, Robert Harris, Nathan Bangs, Guillermo Alvarado Induni
  1. Research Articles

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    2. Research Articles
    1. Interplate seismicity at the CRISP drilling site: The 2002 Mw 6.4 Osa Earthquake at the southeastern end of the Middle America Trench (pages 3035–3050)

      Ivonne G. Arroyo, Ingo Grevemeyer, Cesar R. Ranero and Roland von Huene

      Article first published online: 31 JUL 2014 | DOI: 10.1002/2014GC005359

      Key Points

      • A large subduction earthquake located in the area of interplate drilling project
      • Most of the seismic energy was radiated at shallow depth below the margin slope
      • Cocos Ridge subduction creates conditions for shallower interplate seismogenesis