地球科学进展 ›› 2011, Vol. 26 ›› Issue (12): 1300 -1305. doi: 10.11867/j.issn.1001-8166.2011.12.1300

所属专题: IODP研究

IODP研究 上一篇    下一篇

哥斯达黎加地震起源计划——IODP 334航次介绍
朱俊江   
  1. 中国科学院南海海洋研究所边缘海地质重点实验室, 广东广州510301
  • 收稿日期:2011-11-10 修回日期:2011-11-18 出版日期:2011-12-10
  • 通讯作者: 朱俊江(1976-),男,甘肃永昌人,副研究员,主要从事海洋地球物理和深部构造研究. E-mail:zhupeter618@hotmail.com
  • 基金资助:

    国家自然科学基金青年基金项目“南海东北部大陆边缘洋陆转换带地壳结构研究”(编号:41006030);国家自然科学基金面上项目“南海北部阳江与外海地壳结构及地壳拉张减薄机制”(编号:41176054);国家高技术研究发展计划重点项目“大洋钻探站位调查关键技术研究”(编号:2008AA093001)资助.

Introduction to the Integrated Ocean Drilling Program Expedition  334 Costa Rica Seismogenesis Project

Zhu Junjiang   

  1. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou510301, China
  • Received:2011-11-10 Revised:2011-11-18 Online:2011-12-10 Published:2011-12-10

2011年3月13日至4月13日哥斯达黎加地震起源计划IODP 334航次在中美洲哥斯达黎加俯冲带大陆边缘斜坡带实施。该航次的主要科学目标是研究俯冲剥蚀控制的俯冲带大地震的聚集和破裂过程。在1个月的钻探时间内,总共在4个站位、8个钻孔中获得1 492.88 m的岩芯,获得许多中新世到现代的火山灰层,初步确定上覆板块内沉积物和基底的岩性变化以及俯冲可可洋脊为玄武岩基底的特征。

The Costa Rica Seismogenesis Project (CRISP) (IODP Expedition 334) was carried out on the continental margin slope apron in the Costa Rica subduction zone in Central America during March 13 to April 13, 2011. The primary scientific goals of this expedition are to understand the processes that control nucleation and seismic rupture of large earthquakes at erosion-controlled subduction zone. During one month drilling, onboard totally 1492.88 meters long cores were obtained at four sites and eight holes. Tephra layers with ages ranging from Miocene to present were indentified. Rock variation characteristic of sediments and basement rocks were preliminary defined and basalt from the oceanic Cocos ridge basement was recovered.

中图分类号: 

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