Slow slip source characterized by lithological and geometric heterogeneity

Philip M. Barnes, Laura M. Wallace, Demian M. Saffer, Rebecca E. Bell, Michael B. Underwood, Ake Fagereng, Francesca Meneghini, Heather M. Savage, Hannah S. Rabinowitz, Julia K. Morgan, Hiroko Kitajima, Steffen Kutterolf, Yoshitaka Hashimoto, Christie H. Engelmann De Oliveira, Atsushi Noda, Martin P. Crundwell, Claire L. Shepherd, Adam D. Woodhouse, Robert N. Harris, Maomao WangStuart Henrys, Daniel H.N. Barker, Katerina E. Petronotis, Sylvain M. Bourlange, Michael B. Clennell, Ann E. Cook, Brandon E. Dugan, Judith Elger, Patrick M. Fulton, Davide Gamboa, Annika Greve, Shuoshuo Han, Andre Hüpers, Matt J. Ikari, Yoshihiro Ito, Gil Young Kim, Hiroaki Koge, Hikweon Lee, Xuesen Li, Min Luo, Pierre R. Malie, Gregory F. Moore, Joshu J. Mountjoy, David D. McNamara, Matteo Paganoni, Elizabeth J. Screaton, Uma Shankar, Srisharan Shreedharan, Evan A. Solomon, Xiujuan Wang, Hung Yu Wu, Ingo A. Pecher, Leah J. LeVay

研究成果: Article

3 引文 斯高帕斯(Scopus)

摘要

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.

原文English
文章編號eaay3314
期刊Science Advances
6
發行號13
DOIs
出版狀態Published - 2020

All Science Journal Classification (ASJC) codes

  • General

指紋 深入研究「Slow slip source characterized by lithological and geometric heterogeneity」主題。共同形成了獨特的指紋。

  • 引用此

    Barnes, P. M., Wallace, L. M., Saffer, D. M., Bell, R. E., Underwood, M. B., Fagereng, A., Meneghini, F., Savage, H. M., Rabinowitz, H. S., Morgan, J. K., Kitajima, H., Kutterolf, S., Hashimoto, Y., Engelmann De Oliveira, C. H., Noda, A., Crundwell, M. P., Shepherd, C. L., Woodhouse, A. D., Harris, R. N., ... LeVay, L. J. (2020). Slow slip source characterized by lithological and geometric heterogeneity. Science Advances, 6(13), [eaay3314]. https://doi.org/10.1126/sciadv.aay3314