Rift fault activity and interaction at high resolution using geophysical and drilling data analysis from Greece and East Africa

活跃的大陆裂谷和控制其变形的断层是地震的来源，并创造了一些最重要的沉积物汇。科林斯（希腊）和东非（如坦噶尼喀）是地球上两个最活跃、扩张最迅速的大陆裂谷带，全球公认它们在新大洋盆地形成过程的启动过程中具有重要意义1,2。该项目将整合海洋地震和地震数据、新的海洋钻探岩心和测井数据采样裂谷沉积物（科林斯裂谷：海洋钻探于2017年完成）以及现场和地震数据，研究断裂如何在活动裂谷系统中生长、重叠和相互作用3。在一个活跃的、高速率的构造系统中，研究单个断层如何在时间和空间尺度上与几个地震周期相关的相互作用是很少见的，但是这些新的断层位移历史、年龄和滑动率的组合数据集将提供一个非常高分辨率的断层活动记录。断层对沉积的控制、断层的发育和活动对油气系统具有重要意义。活跃的裂谷带也会产生破坏性的地震，在某些情况下，还会产生海啸：因此断层滑动随时间的变化和断层的相互作用对危害分析很重要。

Active continental rifts and the faults that control their deformation are the source of earthquakes and create some of our most important sediment sinks. Corinth (Greece) and East Africa (e.g., Tanganyika) are two of the most active, rapdily extending continental rift zones on Earth, globally recognised for their significance in the initiation of the process of new ocean basin formation1,2. This project will integrate marine seismic and earthquake data, with new ocean drilling core and log data sampling rift sediments (Corinth rift: ocean drilling completed 20172) and field and earthquake data to study how faults grow, overlap and interact in active rift systems3. It is rare to be able to study how individual faults interact at the temporal and spatial scale relevant to a few earthquake cycles in an active and high-rate tectonic system, but these new combined datasets of fault displacement history, age and slip rate will provide a very high resolution record of fault activity. Fault control on sediment accumulation and fault development and activity are important for hydrocarbon systems. Active rift zones also generate damaging earthquakes and, in some cases, tsunamis: therefore fault slip change through time and fault interaction are important for hazard analysis.