Collaborative Research: Controls on along-strike variations in locked and creeping megathrust behavior at the Hikurangi convergent margin

----------------------------------------------------------------------------------------------------------------------------- 合作研究:控制Hikurangi会聚边缘锁闭和蠕动大逆冲断层行为沿走向变化的物理过程决定了断层滑动模式的谱（跨越破坏性地震到慢滑事件和地震蠕变），以及这些行为与俯冲系统的长期形态构造演化之间的联系尚不清楚。解决这一重要问题的根本需要是采用一种综合的系统级方法，将地球动力学建模与俯冲边缘特征的高质量地球物理和地质约束相结合。该项目将开展一个跨学科的多国合作项目，涉及美国、新西兰、日本和英国，以评估控制俯冲带滑动行为和长期变形过程的系统级控制。重点是新西兰的Hikurangi边缘，那里的GPS数据显示了滑动行为的转变，从南部的主要粘滑到北岛北部的地震蠕变，以及广泛的俯冲相关过程和特征沿走向变化。目的是严格研究长期地质记录中板块界面滑动行为、固体和流体质量通量以及板块边界力学表现之间的反馈，这些反馈可能反映了弧前隆起、沉积物转移和底板、板块边界强度和地震发生等共同驱动过程。首席研究人员将通过结合大规模地震成像、古地震学和地貌学的综合方法来解决这个重要问题，并通过最先进的数值模拟来集中注意力。

-----------------------------------------------------------------------------------------------------------------------------Collaborative Research: Controls on along-strike variations in locked and creeping megathrust behavior at the Hikurangi convergent marginThe physical processes dictating the spectrum of fault slip modes (spanning destructive earthquakes to slow slip events and aseismic creep) and the links between these behaviors and long-term morphotectonic evolution of subduction systems are not understood. There is a fundamental need to address this important problem with an integrated, system-level approach combining geodynamical modeling with high-quality geophysical and geological constraints on subduction margin characteristics.This project will conduct an interdisciplinary, multinational collaborative program involving the USA, New Zealand, Japan and the UK to evaluate system-level controls on processes that govern both slip behavior and long-term deformation at subduction zones. The focus is on the Hikurangi margin in New Zealand, where GPS data show a transition in slip behavior from predominantly stick-slip in the south to aseismic creep in the northern North Island, and where a wide range of subduction-related processes and characteristics vary along-strike. The aim is to rigorously investigate the feedbacks between plate interface slip behavior, solid and fluid mass fluxes, and manifestations of plate boundary mechanics in the long-term geological record that likely reflect common driving processes linking forearc uplift, sediment transfer and underplating, plate boundary strength, and seismogenesis. The Principal Investigators will address this important problem through an integrated approach combining large-scale seismic imaging, paleoseismology, and geomorphology, focused through the lens of state-of-the-art numerical modelling.