Mini-Workshop for the South Island, New Zealand Primary Site coordination

Grand Hyatt San Francisco

345 Stockton Street, San Francisco, CA

Union Square Room – 36^th Floor

Sunday December 14, 2014, 1:30 – 5pm

Thank you for your participation in the Mini-Workshop for the South Island, New Zealand Primary Site coordination at the 2014 AGU Fall Meeting! Pictures of all GeoPRISMS activities at AGU are available here.

Download the participant list

Conveners: Mike Gurnis, Sean Gulick, Ellen Syracuse, Tim Stern, Phaedra Upton

AnnouncementPresentation archiveVenueRead the report

The South Island of New Zealand offers a wealth of prospects for subduction zone research. The Puysegur Trench region — a juvenile subduction zone “caught in the act” of initiation — provides unique opportunities to investigate the geodynamics of the process. In Fiordland tectonic motions have led to deep exhumation of the only pristine Cretaceous arc section in the circum-Pacific and offers a prime locale to investigate the root zones of an ancient arc at outcrop scale. Excellent opportunities exist in both regions to address fault slip and its spatial variability. Addressing questions on subduction initiation, exhumed terranes, and subduction thrust slip behavior in one region is an exciting opportunity, and will require large geophysical field deployments, targeted geological fieldwork, sampling, geochemical analysis, multi- scale geodynamic models, and integration of diverse data types. Solving the questions may require ocean drilling and sampling through IODP. The South Island mini-workshop will focus on: 1. Brief reviews and discussion of latest work on GeoPRISMS science questions within Puysegur and Fiordland; 2. Presentation of specific plans on a wide range of studies (including geological sampling, passive and active geophysical experiments, and IODP drilling); 3. Review and discuss the capabilities of facilities from the US, NZ and other countries and how they could be used to address plans; and 4. Make plans for science collaboration. Researchers in any geoscience field are invited to participate in the workshop, including those who have not worked in the region previously.

Conveners:

Mike Gurnis, Caltech

Sean Gulick, University of Texas Institute for Geophysics

Ellen Syracuse, Los Alamos National Laboratory

Tim Stern, Victoria University of Wellington

Phaedra Upton, GNS Science

Introduction

1:30 Introductory remarks and logistics | 86 Kb – Michael Gurnis

1:40 Introduction to GeoPRISMS and NSF funding schedule for focus sites | 1 Mb – Peter van Keken

1:50 Recap of science priorities defined for Puysegur and Fiordland in the GeoPRISMS implementation plan | Sean Gulick

2:10-3:00 Ongoing and already proposed projects | Chair: Tim Stern

1. The exhumed arc roots exposed at Fiordland and opportunities for an ExTerra Field Institute | 3 Mb – Sarah Penniston-Dorland (U Maryland) and Joshua Schwartz (Cal State Northridge)

2. Surface processes and the history of earthquakes from the sedimentary record in Fiordland | Jamie Howarth (GNS Science)

3. Measuring Crustal and fault structure across Puysegur with active source seismology | 3 Mb – Harm Van Avendonk (UT Austin)

4. Constraining mantle volatiles in Fiordland and Puysegur with an MT experiment | 7 Mb – Michal Kordy (U. Utah)

5. The need for magnetic measurements along Puysegur and the history of spreading between AUS and PAC | 16Mb – Joann Stock (Caltech)

6. Investigating adakitic volcanism and subduction initiation at Solander Island and the adjacent seafloor | 2 Mb – Brian Jicha (U. Wisconsin)

7. Exploring the hyperextended margin of the Campbell Plateau | Simon Lamb & Tim Stern (Victoria University of Wellington)

8. On going work | 1 Mb – Martha Savage (Victoria University of Wellington)

9. Investigating Exhumed Lower Arc Crust in Fiordland | Joshua Schwartz (GNS Science)

3:00-3:15 Short break

3:15-4:15 Discussion and breakout

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.

4:15-5:00 Develop a short listing that prioritizes the science gaps that need to be filled.

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

South Island, New Zealand primary site coordination mini-workshop (1:30pm-5 pm, December 14, 2014)

“South Island, New Zealand primary site coordination mini-workshop”, Gulick, S., Gurnis, M., Syracuse, E., Stern, T., Upton, P.; GeoPRISMS Newsletter, Issue No. 34, Spring 2015.

On Sunday December 14, 2014, from 1:30 to 5 pm, a diverse group of researchers met in the Grand Hyatt San Francisco before the AGU Fall Meeting to discuss coordination of work within the South Island, New Zealand GeoPRISMS primary site. The South Island of New Zealand offers extraordinary opportunities to address subduction cycles and dynamics science questions. Members of the community are gearing up for work in New Zealand and so the time was ripe to foster collaboration between US scientists and others internationally.