期刊
SCIENCE ADVANCES
卷 6, 期 13, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aay3314
关键词
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资金
- Endeavour fund [CO5X1605]
- NIWA SSIF
- NERC IODP Moratorium Grant [NE/S00291X/1, NE/S002731/1]
- ERC Starting Grant [715836]
- German Research Foundation [KU2685/11-1]
- CAPES/IODP Fellowship [88881.131465/2016-01]
- IODP UK grant [NE/S008853/1]
- IODP JRSO (NSF grant) [1326927]
- U.S. Science Support Program
- Ser Cymru NRN-LCEE
- NERC UKIODP grant [NE/R016992/1]
- KETEP MOTIE [20168510030830]
- Deutsche Forschungsgemeinschaft Grant [HU-1789/5-1]
- K-IODP
- IODP-China, Tongji University [20180305]
- National Natural Science Foundation of China [41976077]
- Australia/NZ IODP Consortium (ANZIC)
- NERC [NE/S00291X/1, NE/S008853/1, NE/S002731/1] Funding Source: UKRI
- Division Of Ocean Sciences
- Directorate For Geosciences [1326927] Funding Source: National Science Foundation
- European Research Council (ERC) [715836] Funding Source: European Research Council (ERC)
- Korea Evaluation Institute of Industrial Technology (KEIT) [20168510030830] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Slow slip events (SSEs) accommodate a significant proportion of tectonic plate motion at subduction zones, yet little is known about the faults that actually host them. The shallow depth (<2 km) of well-documented SSEs at the Hikurangi subduction zone offshore New Zealand offers a unique opportunity to link geophysical imaging of the subduction zone with direct access to incoming material that represents the megathrust fault rocks hosting slow slip. Two recent International Ocean Discovery Program Expeditions sampled this incoming material before it is entrained immediately down-dip along the shallow plate interface. Drilling results, tied to regional seismic reflection images, reveal heterogeneous lithologies with highly variable physical properties entering the SSE source region. These observations suggest that SSEs and associated slow earthquake phenomena are promoted by lithological, mechanical, and frictional heterogeneity within the fault zone, enhanced by geometric complexity associated with subduction of rough crust.
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