Mapping the continuity of the Nazca Plate through its aseismic part in the Arica Elbow (Central Andes)
作者: Catherine Dorbath
作者单位: 1ORSTOM and EOPG, URA 1358 CNRS, Paris, France
刊名: Physics of the Earth and Planetary Interiors, 1997, Vol.101 (1), pp.163-173
来源数据库: Elsevier Journal
DOI: 10.1016/S0031-9201(96)03206-2
原始语种摘要: Abstract(#br)Along the Peru-Chile trench, the subduction of the Nazca Plate under South America is well underlined by the Wadati Benioff zone. In the Central Andes, the seismicity defines a moderately deepening slab down to about 325 km. The occurrence of a scarce seismicity in the 550–650 km depth range, after a complete seismic quiescence, raises the question of the continuity of the slab. To answer this question we performed a 3-D teleseismic tomography of the mantle at 20°S. On the tomographic image, a higher velocity zone is associated with the subducted plate where it is defined by the Wadati Benioff zone. At greater depth, this higher velocity body can be followed through the model down to the lower mantle. Our results provide clear evidence of the continuity of the slab throughout...
全文获取路径: Elsevier  (合作)
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影响因子:2.383 (2012)

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关键词翻译
关键词翻译
  • seismicity 地震活动
  • aseismic 无震的
  • continuity 连续性
  • Benioff zone[地]贝尼奥夫带
  • quiescence 休眠
  • velocity 速度
  • subduction 俯冲
  • through 经过
  • occurrence 事件
  • Andes 安第斯山脉