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.

最近国际上对马尔马拉海的关注导致了浅层、极高分辨率地震勘探，绘制了断层和沉积物破坏的地表和近地表痕迹，以及深穿透、低分辨率多道地震勘探，对深盆地和地壳结构进行了成像。2008年7月，支持者在整个马尔马拉获得了2 700公里高分辨率MCS反射数据，填补了这些数据集之间的分辨率差距。目前拟议的研究将支持继续分析和解释现有数据，以重建马尔马拉在过去100万年的构造演化。将进行再处理和详细的地层和构造解释，以确定不同断层系统活动的时间、主要断层的滑动速率以及地层对构造和气候的反应。叠前深度偏移也将应用于深穿透Seismarmara勘测的选定剖面，以更好地估计断层几何形状。 马尔马拉是一个理想的设置，以解决以下基本问题，有关转换盆地：1）什么是模式的盆地增长在空间和时间，以及他们如何与变形在深度？2)最近的构造体制是否可以外推到沉积盆地的开始（即，稳定状态构造），还是构造随时间而变化？3)主要断层的几何形状是什么，板块运动如何在它们之间分配？4)马尔马拉的断层是如何受到既存构造的影响的？地震灾害研究、国际合作和学生培训是一些更广泛的影响。