Expedition 372B/375 summary

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doi: 10.14379/iodp.proc.372B375.101.2019
Author(s): Saffer, Demian M.; Wallace, Laura M.; Barnes, Philip M.; Pecher, Ingo A.; Petronotis, Katerina E.; LeVay, Leah J.; Bell, Rebecca E.; Crundwell, Martin P.; Engelmann de Oliveira, Christie H.; Fagereng, Ake; Fulton, Patrick M.; Greve, Annika; Harris, Robert N.; Hashimoto, Yoshitaka; Hüpers, Andre; Ikari, Matt J.; Ito, Yoshihiro; Kitajima, Hiroko; Kutterolf, Steffen; Lee, Hikweon; Li Xuesen; Luo Min; Malie, Pierre R.; Meneghini, Francesca; Morgan, Julia K.; Noda, Atsushi; Rabinowitz, Hannah S.; Savage, Heather M.; Shepherd, Claire L.; Shreedharan, Srisharan; Solomon, Evan A.; Underwood, Michael B.; Wang Maomao; Woodhouse, Adam D.; Bourlange, Sylvain M.; Brunet, Morgane M. Y.; Cardona, Sebastian; Clennell, Michael B.; Cook, Ann E.; Dugan, Brandon; Elger, Judith; Gamboa, Davide; Georgiopoulou, Aggeliki; Han, Shuoshuo; Heeschen, Katja U.; Hu Gaowei; Kim, Gil Young; Koge, Hiroaki; Machado, Karina S.; McNamara, David D.; Moore, Gregory F.; Mountjoy, Joshu J.; Nole, Michael A.; Owari, Satoko; Paganoni, Matteo; Rose, Paula S.; Screaton, Elizabeth J.; Shankar, Uma; Torres, Marta E.; Wang Xiujuan; Wu, Hung-Yu
International Ocean Discovery Program, Expedition 372B Scientists, College Station, TX
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Geosciences, United States
Other:
GNS Science, New Zealand
National Institute of Water and Atmospheric Research, New Zealand
University of Auckland, New Zealand
Texas A&M University, United States
Imperial College London, United Kingdom
Volume Title: Proceedings of the International Ocean Discovery Program; Hikurangi subduction margin coring, logging, and observatories; Expedition 372B/375 of the R/V JOIDES Resolution, Timaru, New Zealand, to Auckland, New Zealand; Sites U1518-U1520 and U1526, 8 March-5 May 2018
Volume Author(s): Pecher, Ingo A.; Barnes, Philip M.; LeVay, Leah J.; Bourlange, Sylvain M.; Brunet, Morgane M. Y.; Cardona, Sebastian; Clennell, Michael B.; Cook, Ann E.; Dugan, Brandon; Elger, Judith; Gamboa, Davide; Georgiopoulou, Aggeliki; Han, Shuoshuo; Heeschen, Katja U.; Hu Gaowei; Kim, Gil Young; Koge, Hiroaki; Machado, Karina S.; McNamara, David D.; Moore, Gregory F.; Mountjoy, Joshu J.; Nole, Michael A.; Owari, Satoko; Paganoni, Matteo; Rose, Paula S.; Screaton, Elizabeth J.; Shankar, Uma; Torres, Marta E.; Saffer, Demian M.; Wallace, Laura M.; Petronotis, Katerina E.; Bell, Rebecca E.; Wang Xiujuan; Wu Hungyu; Crundwell, Martin P.; Engelmann de Oliveira, Christie H.; Fagereng, Ake; Fulton, Patrick M.; Greve, Annika; Harris, Robert N.; Hashimoto, Yoshitaka; Hüpers, Andre; Ikari, Matt J.; Ito, Yoshihiro; Kitajima, Hiroko; Kutterolf, Steffen; Lee, Hikweon; Li Xuesen; Luo Min; Malie, Pierre R.; Meneghini, Francesca; Morgan, Julia K.; Noda, Atsushi; Rabinowitz, Hannah S.; Savage, Heather M.; Shepherd, Claire L.; Shreedharan, Srisharan; Solomon, Evan A.; Underwood, Michael B.; Wang Maomao; Woodhouse, Adam D.
Source: Proceedings of the International Ocean Discovery Program; Hikurangi subduction margin coring, logging, and observatories; Expedition 372B/375 of the R/V JOIDES Resolution, Timaru, New Zealand, to Auckland, New Zealand; Sites U1518-U1520 and U1526, 8 March-5 May 2018, Ingo A. Pecher, Philip M. Barnes, Leah J. LeVay, Sylvain M. Bourlange, Morgane M. Y. Brunet, Sebastian Cardona, Michael B. Clennell, Ann E. Cook, Brandon Dugan, Judith Elger, Davide Gamboa, Aggeliki Georgiopoulou, Shuoshuo Han, Katja U. Heeschen, Hu Gaowei, Gil Young Kim, Hiroaki Koge, Karina S. Machado, David D. McNamara, Gregory F. Moore, Joshu J. Mountjoy, Michael A. Nole, Satoko Owari, Matteo Paganoni, Paula S. Rose, Elizabeth J. Screaton, Uma Shankar, Marta E. Torres, Demian M. Saffer, Laura M. Wallace, Katerina E. Petronotis, Rebecca E. Bell, Wang Xiujuan, Wu Hungyu, Martin P. Crundwell, Christie H. Engelmann de Oliveira, Ake Fagereng, Patrick M. Fulton, Annika Greve, Robert N. Harris, Yoshitaka Hashimoto, Andre Hüpers, Matt J. Ikari, Yoshihiro Ito, Hiroko Kitajima, Steffen Kutterolf, Hikweon Lee, Li Xuesen, Luo Min, Pierre R. Malie, Francesca Meneghini, Julia K. Morgan, Atsushi Noda, Hannah S. Rabinowitz, Heather M. Savage, Claire L. Shepherd, Srisharan Shreedharan, Evan A. Solomon, Michael B. Underwood, Wang Maomao and Adam D. Woodhouse; International Ocean Discovery Program, Expedition 372B Scientists, College Station, TX; International Ocean Discovery Program, Expedition 375 Scientists. Proceedings of the International Ocean Discovery Program, Expedition Reports, Vol.372B/375, 34p. Publisher: International Ocean Discovery Program, Washington, DC, United States. ISSN: 2377-3189 CODEN: IDSDA6
Note: In English. 63 refs.; illus., incl. 1 table, sketch map
Summary: Slow slip events (SSEs) at the northern Hikurangi subduction margin, New Zealand, are among the best-documented shallow SSEs on Earth. International Ocean Discovery Program Expeditions 372 and 375 were undertaken to investigate the processes and in situ conditions that underlie subduction zone SSEs at the northern Hikurangi Trough. We accomplished this goal by (1) coring and geophysical logging at four sites, including penetration of an active thrust fault (the Papaku fault) near the deformation front, the upper plate above the SSE source region, and the incoming sedimentary succession in the Hikurangi Trough and atop the Turanganui Knoll seamount; and (2) installing borehole observatories in the Papaku fault and in the upper plate overlying the slow slip source region. Logging-while-drilling (LWD) data for this project were acquired as part of Expedition 372, and coring, wireline logging, and observatory installations were conducted during Expedition 375. Northern Hikurangi subduction margin SSEs recur every 1-2 y and thus provide an ideal opportunity to monitor deformation and associated changes in chemical and physical properties throughout the slow slip cycle. In situ measurements and sampling of material from the sedimentary section and oceanic basement of the subducting plate reveal the rock properties, composition, lithology, and structural character of material that is transported downdip into the SSE source region. A recent seafloor geodetic experiment raises the possibility that SSEs at northern Hikurangi may propagate to the trench, indicating that the shallow thrust fault (the Papaku fault) targeted during Expeditions 372 and 375 may also lie in the SSE rupture area and host a portion of the slip in these events. Hence, sampling and logging at this location provides insights into the composition, physical properties, and architecture of a shallow fault that may host slow slip. Expeditions 372 and 375 were designed to address three fundamental scientific objectives: 1. Characterize the state and composition of the incoming plate and shallow fault near the trench, which comprise the protolith and initial conditions for fault zone rock at greater depth and which may itself host shallow slow slip; 2. Characterize material properties, thermal regime, and stress conditions in the upper plate directly above the SSE source region; and 3. Install observatories in the Papaku fault near the deformation front and in the upper plate above the SSE source to measure temporal variations in deformation, temperature, and fluid flow. The observatories will monitor volumetric strain (via pore pressure as a proxy) and the evolution of physical, hydrological, and chemical properties throughout the SSE cycle. Together, the coring, logging, and observatory data will test a suite of hypotheses about the fundamental mechanics and behavior of SSEs and their relationship to great earthquakes along the subduction interface.
Year of Publication: 2019
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; 16 Structural Geology; 20 Geophysics, Applied; Biostratigraphy; Boreholes; Cenozoic; Chemostratigraphy; Clastic rocks; Cores; Cretaceous; Deformation; Expedition 375; Faults; Foraminifera; Geophysical methods; Geophysical profiles; Geophysical surveys; Hikurangi Margin; Hikurangi Trough; IODP Site U1518; IODP Site U1519; IODP Site U1520; IODP Site U1526; International Ocean Discovery Program; Lithostratigraphy; Magnetostratigraphy; Marine sediments; Mesozoic; Microfossils; Monitoring; Nannofossils; Pacific Ocean; Paleomagnetism; Papaku Fault; Physical properties; Quaternary; Sedimentary rocks; Sediments; Seismic methods; Seismic profiles; Slow slip events; South Pacific; Southwest Pacific; Subduction zones; Surveys; Tertiary; Thrust faults; Well logs; West Pacific
Coordinates: S385133 S385133 E1785346 E1785346
S384338 S384338 E1783654 E1783651
S385810 S385810 E1790756 E1790756
S390119 S390119 E1791445 E1791445
Record ID: 2019046812
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.