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首页> 外文期刊>Oceanography >Submarine Paleoseismology Along Populated Transform Boundaries: The Enriquillo-Plantain-Garden Fault, Canal du Sud, Haiti, and the North Anatolian Fault, Marmara Sea, Turkey
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Submarine Paleoseismology Along Populated Transform Boundaries: The Enriquillo-Plantain-Garden Fault, Canal du Sud, Haiti, and the North Anatolian Fault, Marmara Sea, Turkey

机译：沿填充转换边界的海底古地震学：海地恩里基洛-车前草-花园断裂，海地运河，土耳其马尔马拉海和安纳托利亚北部断裂

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摘要

Continental transform boundaries cross heavily populated regions and are associated with destructive earthquakes worldwide. The devastating 1999 Turkey earthquakes and the offshore 2010 Haiti earthquake emphasized the urgent need to study the submerged segments of continental transforms. In response, the rapidly evolving field of submarine paleoseismology is focusing its attention on understanding the relationships between sedimentation, seafloor ruptures, and earthquake recurrence intervals along submarine faults. In Canal du Sud, Haiti, the 2010 earthquake-triggered sedimentation events were documented from nearshore to the deep basin by measuring the excess Th in sediment cores. This radioisotope, with a half-life of 24 days, tracked mass wasting, turbidites, turbidite-homogenite units, and a sediment plume that remained in the water column for at least two months after the earthquake. However, the turbidite units in Canal du Sud, Haiti, provide an incomplete record of the regions earthquake history, likely because sedimentation rates are too low for sedimentation events to be triggered by all earthquakes. In contrast, in the Marmara Sea basins, there is very good correlation between turbidites and the historical record of earthquakes dating back 2,000 years. The difference between these correlations is likely related to both sedimentation rates and particulars of the ruptures. Future research along the Enriquillo-Plantain-Garden fault in Haiti and along similar low sedimentation plate boundaries should focus on multiple fault segments in order to obtain complete earthquake recurrence histories.
机译：大陆变换边界跨越人口稠密的地区，并与世界范围内的破坏性地震有关。毁灭性的1999年土耳其地震和2010年海地近海地震都凸显了研究大陆变换淹没部分的迫切需要。作为响应，海底古地震学的快速发展领域将注意力集中在理解沿海底断层的沉积，海底破裂和地震复发间隔之间的关系。在海地的南运河，通过测量沉积物芯中的过量Th记录了2010年地震触发的沉积事件从近岸到深海盆地。这种放射性同位素的半衰期为24天，跟踪了质量消减，浊度，浊度-均质岩单元以及在地震后至少两个月留在水柱中的沉积物羽流。但是，海地Canal du Sud的浊浊单元不能提供该地区地震历史的完整记录，这很可能是因为沉积速率太低，导致所有地震都无法触发沉积事件。相比之下，在马尔马拉海盆地，浊积岩与距今2000年的地震历史记录之间有着很好的相关性。这些相关性之间的差异可能与沉降速率和破裂的细节有关。未来在海地Enriquillo-Plantain-Garden断层以及类似的低沉积板块边界上的研究应集中在多个断层段上，以便获得完整的地震复发历史。

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  • 来源
    《Oceanography》 |2014年第2期|118-131|共14页
  • 作者

    CECILIA M.G. McHUGH; LEONARDO SEEBER; MARIE-HELENE CORMIER; MATTHEW HORNBACH;

  • 作者单位

    School of Earth and Environmental Sciences, Queens College, Flushing, NY, USA, and Senior Adjunct Researcher, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY,USA;

    Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA;

    University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, USA;

    Southern Methodist University, Huffington Department of Earth Sciences, Dallas, TX, USA;

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