Workshop to cultivate and coordinate GeoPRISMS studies of the Hikurangi subduction margin

   Grand Hyatt San Francisco
345 Stockton Street, San Francisco, CA
Union Square Room – 36th Floor

Sunday December 14, 2014, 9 – 12pm

Thank you for your participation in the Mini-Workshop to cultivate and coordinate GeoPRISMS studies of the Hikurangi subduction margin at the 2014 AGU Fall Meeting! Pictures of all GeoPRISMS activities at AGU are available here.

Download the participant list

Conveners: Laura Wallace, Mike Underwood, Samer Naif, Bill Fry, Stephen Bannister, and Nathan Bangs

AnnouncementPresentation archiveVenueRead the report

The Hikurangi subduction margin in New Zealand offers an outstanding opportunity to address many fundamental questions on subduction margin deformation and megathrust behavior. The objectives of the Hikurangi mini-workshop will be to foster new relationships among researchers who will develop amphibious projects across a spectrum of geophysical, geological, and geochemical approaches. Discussion will occur within the context of existing planned projects, including a proposed IODP transect. Data acquisition activities are ongoing by New Zealand, United States, Japanese and European scientists. We will discuss ways of leveraging and coordinating these existing efforts with new efforts to maximize potential GeoPRISMS outcomes at the Hikurangi focus site.

We encourage all researchers interested in subduction processes at the Hikurangi margin to attend. We also encourage attendees interested in subduction deformation and megathrust processes in Cascadia and Alaska, to cross-fertilize ideas and implementation strategies among all three of the GeoPRISMS primary sites. Some of the topics to be discussed include:

  1. the state of the incoming plate and the role of incoming sediment properties in subduction thrust behavior and margin evolution;
  2. physical properties of the megathrust and the influence of this on megathrust behavior;
  3. fluid sources and fluxes, with emphasis on the forearc;
  4. microseismicity, episodic slip, and tremor.

Attendees will collectively identify new research activities that address these topics most effectively, with an emphasis on leveraging existing studies/datasets.

Laura Wallace, University Texas Institute for Geophysics, UT-Austin
Mike Underwood, University of Missouri
Samer Naif, Scripps Institution of Oceanography, UC San Diego
Bill Fry, GNS Science
Stephen Bannister, GNS Science

Nathan Bangs, University Texas Institute for Geophysics, UT-Austin


9:00     Introductory remarks and logistics | Laura Wallace
9:05     Introduction to GeoPRISMS and NSF funding schedule for focus sites | icon-file 2 Mb – Peter van Keken

9:15     Recap of science priorities defined for Hikurangi in the GeoPRISMS implementation plan | icon-file 4 Mb – Mike Underwood

9:30-10:30     Ongoing and already proposed projects (~5 minutes each/2 slides, except where otherwise noted) | Chair: Samer Naif

Status of IODP drilling and observatory proposals at North Hikurangi |   2 Mb – Demian Saffer
OBS and seafloor pressure sensor deployments (HOBITSS project) |   2 Mb – Laura Wallace
Hikurangi Heatflow | icon-file 400 Kb – Laura Wallace to overview on behalf of Rob Harris and Anne Trehu
Hikurangi fluid budgets | Susan Ellis
Current offshore Hikurangi research |  2 Mb – Phil Barnes
Hikurangi seismological studies |   4 Mb – Bill Fry,   2 Mb Donna Eberhart-Phillips,   2 Mb Martha Savage
Japan-led seismological and seafloor geodetic efforts |   1 Mb – Yoshihiro Ito
Hikurangi 3D Seismic proposal | – Nathan Bangs
Physical controls on variations in slip behavior at Hikurangi- interdisciplinary proposal to do 2D seismic, CSEM, paleoseismology, GPS, and numerical modeling | – Kirk Mcintosh

10:30-10:45     Open discussion of additional ongoing/proposed projects not discussed above

10:45-11:00       Short break

11:00-12:30     Discussion: Studies that should be proposed at the Hikurangi margin | Chairs: Mike Underwood and Laura Wallace

Discussion will focus on studies that are needed to fill existing science/dataset gaps in the implementation plan. Discussion will also include leveraging existing datasets, and on linking in with other planned/proposed studies. Coordinating logistics, such as taking advantage of ships that will be in the area, should also be discussed. Participants are welcome to come with a few slides if appropriate—please let us know in advance if you plan to bring slides, so we can be sure to fit this in. We will develop a short listing of potential projects that prioritizes the science gaps that need to be filled.

VUW contributions to Hikurangi research proposed or in process | icon-file 2 MbMartha Savage

The mini-workshop will be held in the Union Square Room, located on the 36th floor of the Grand Hyatt Hotel

Workshop to cultivate and coordinate GeoPRISMS studies of the Hikurangi subduction margin (9am-12 pm, December 14, 2014)

“Workshop to cultivate and coordinate GeoPRISMS studies of the Hikurangi subduction margin”, Wallace, L., Underwood, M., Naif, S., Fry, B., Bannister, S., Bangs, N.; GeoPRISMS Newsletter, Issue No. 34, Spring 2015.

On Sunday, December 14, 2014, an enthusiastic group of more than 70 international researchers from a variety of disciplines met in San Francisco at AGU to discuss studies that should be proposed at the Hikurangi subduction margin for the upcoming GeoPRISMS funding rounds.  The objective of the mini-workshop was to promote and coordinate new collaborations to fill critical gaps in the GeoPRISMS Implementation Plan. To that end, a series of short talks highlighted projects that are either ongoing, already proposed, or soon to be proposed. The last half of the meeting was focused on open discussion during which participants identified new research opportunities.