Collaborative Research: The North Anatolian Fault in the Marmara Sea, Turkey: The Growth of Continental Transform Basins

合作研究：土耳其马尔马拉海北安纳托利亚断层：大陆转换盆地的增长

• 批准号: 0928447
• 负责人: Michael Steckler
• 金额: $ 30万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928447&HistoricalAwards=false
• 关键词: Collaborative; Research; North; Anatolian; Fault

Recent international focus on the Marmara Sea has led to shallow, very high-resolution seismic surveys that mapped the surface and near-surface traces of faults and sediment failures as well as deep-penetration, low-resolution multichannel seismic surveys that image the deep basin and crustal structure. In July 2008, the proponents acquired 2700 km of high-resolution MCS reflection data throughout Marmara that fills the resolution gap between those datasets. The current proposed study will support the continuation of analysis and interpretation of the available data to reconstruct the tectonic evolution of Marmara in the last ~1 million years. Reprocessing and detailed stratigraphic and structural interpretations will be undertaken to determine the times at which different fault systems were active, slip rates on major faults, and the stratigraphic response to tectonics and climate. Pre-stack depth migration will also be applied to selected profiles from the deep-penetration Seismarmara survey to obtain better estimates of fault geometry. The Marmara is an ideal setting in which to address the following fundamental questions regarding transform basins: 1) What are the patterns of basin growth in space and time, and how do they relate to the deformation at depth? 2) Can the recent tectonic regime be extrapolated back to the onset of the sedimentary basins (i.e., steady-state tectonics), or have tectonics changed through time? 3) What are the geometries of major faults, and how is plate motion partitioned between them? 4) How are faults in Marmara influenced by pre-existing structures?Study of earthquake hazards, international cooperation and student training are some of the broader impacts.

最近，国际对马尔马拉海的关注导致了非常高分辨率的地震调查，这些调查绘制了断层和沉积物故障的表面和近地面痕迹，以及深度渗透，低分辨率的多层多通道地震调查，这些调查图像深层盆地和地壳结构形象。 2008年7月，支持者在整个马尔马拉（Marmara）中获得了2700公里的高分辨率MCS反射数据，以填补这些数据集之间的分辨率差距。当前提出的研究将支持对可用数据的分析和解释的继续，以重建过去约100万年的Marmara的构造演变。将进行重新处理和详细的地层和结构解释，以确定不同断层系统处于活动状态的时间，对主要断层的滑移速率以及对构造和气候的地层响应。堆栈深度迁移也将应用于深度渗透seismarmara调查中的选定曲线，以获得更好的断层几何形状估计。 马尔马拉（Marmara）是一个理想的环境，可以在其中解决有关转化盆地的以下基本问题：1）空间和时间上盆地增长的模式是什么，它们与深度的变形有何关系？ 2）最近的构造制度可以推断回沉积盆地的发作（即稳态构造），还是随着时间的推移改变了构造学？ 3）主要断层的几何形状是什么，它们之间的板运动如何分配？ 4）马尔马拉的缺点如何受到现有结构的影响？研究地震危害，国际合作和学生培训是一些更广泛的影响。