|
|
Hikurangi Heat Flow
-
2015
-
Roger Revelle
|
|
|
|
Project Title: |
Collaborative Research: The Thermal Regime of the Hikurangi Subduction Zone and Shallow Slow Slip Events, New Zealand |
Project Status: |
Submitted |
|
Principal Investigator: |
Robert N. Harris, OSU_COAS |
Project Institution: |
OSU_COAS |
|
Project ID: |
103984 |
Version #: |
3 |
|
Date Submitted: |
7/24/2013 2:53:00 PM |
Created By: |
Robert N. Harris |
|
Date Last Modified: |
7/1/2014 8:55:00 AM |
URI Serial #: |
None |
|
Funding Agencies: |
NSF/OCE/MGG - 1355878 - Funded |
|
Summary of Field Work: |
We propose to collect heat flow and seismic reflection data offshore the northern and southern Hikurangi margin to develop a process-based understanding of the thermal structure of the Hikurangi subduction zone. The northern field study area is underlain by an aseismic creep-dominated subduction interface and is the site of repeated shallow (< 15 km depth) slow slip earthquakes (SSEs). The southern field area contrasts strongly with the northern field area; here SSEs are deep (> 30 km) and geodetic studies indicate updip interseismic coupling on the plate interface, similar to in Cascadia. We will acquire ~15 high-resolution transects of closely-spaced heat flow measurements from well-characterized sites, increasing the number of publically available heat flow measurements from this continental margin by 2 orders of magnitude. Using sediment seismic velocities and thermal conductivities obtained from this experiment, we will expand coverage of heat flow using regional observations of gas hydrate-related bottom simulating reflections (BRSs). |
|
Summary of Facility Requirements: |
Global class vessel for seismic and heat flow data collection. Should have
dynamic positioning capability for station keeping. |
|
Summary of other requirements and comments: |
Will use OSU multipenetration heat flow probe and SIO seismic gear. |
|
|
Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
|
Request ID: |
1006364 |
Created By: |
Robert N. Harris |
|
Date Last Modified: |
1/27/2014 3:28:00 PM |
Date Submitted: |
7/24/2013 2:53:00 PM |
|
|
Year: |
2015
|
Ship/Facility: |
Roger Revelle
|
|
Optimum Start Date:
|
5/15/2015 |
Dates to Avoid: |
This cruise should be scheduled immediately prior to Hikurangi OBS recovery cruise being requested by Laura Wallace. The request for OBS recovery cruise is for March 2015. |
|
|
|
|
|
|
Earliest Start Date: |
1/1/2015 |
Multi-Ship Op: |
No |
|
Latest Start Date: |
3/1/2015 |
Other Ship(s): |
|
|
|
Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
|
27 |
1 |
1 |
2 |
31 |
Repeating Cruise?
(within same year) |
No |
Interval: |
|
# of Cruises: |
|
|
|
Description of Repeating cruise requirements: |
|
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
There are two logistical issues with the New Zealand cruise.
1) We would like to precede the Hobbit OBS recovery cruise. Part of our cruise will be seismic reflection and we would like to use the OBSs to effectively extend our offset length which will help to get better seismic velocities.
2) Perhaps more pressing is that I also have a cruise scheduled in the Panama Basin in Feb. 2015. Our shipping people tell me it will take 6-8 weeks to ship the heat flow equipment from Panama to New Zealand. I still do not have definitive dates but we should be demobilizing from the Panama Basin cruise at the end of Feb. Based on my current understanding of the demob date for the Panama cruise I would request a start date of May 15th, but this gets into the southern winter. I have contacted our shipping people and will look at options for air freighting the heat flow equipment. Currently there is only one set of heat flow equipment in the U.S. academic community. |
|
Short Description of Op Area
for use in schedules: |
New Zealand |
| Description of Op Area: |
Offshore east coast of North Island, New Zealand |
| Op Area Size/Dia.: |
|
|
|
| |
Lat/Long |
Marsden Grid |
Navy Op Area |
|
Beginning
|
39° 28.8' S
/
176° 55.2' W
map
|
|
|
|
Ending
|
39° 28.8' S
/
176° 55.2' W
map
|
|
|
| |
Show Degrees Minutes |
|
|
|
|
|
Foreign Clearance Required? |
Yes |
Coastal States:
|
 Important Info on Foreign Research Clearances
|
|
Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
|
No |
If yes, have you applied for the necessary permits through your export control office?
|
No |
| Questions about ITAR/EAR regulations?
|
Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
|
|
|
Requested Start Port |
Intermediate Port(s) |
Requested End Port |
|
Napier, New Zealand |
None |
Napier, New Zealand |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
Port chosen due to proximity to deployment site and due to availability of cranes etc. for loading/unloading equipment. Gisborne NZ also considered as a port, much closer to our
deployment area, but the Gisborne port may be too small. |
Important Info on Working in Foreign Ports
|
|
|
|
Chief Scientist: |
Robert N. Harris, OSU_COAS |
|
# in Science Party |
12 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
|
1 |
|
Explanation of Science Party Requirements and Technician Requirements |
SIO seismic technicians are needed to run seismic reflection equipment. |
|
 Dynamic Positioning |  ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
|
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
Dynamic positioning for station keeping
Swath bathymetry
Will use SIO seismic reflection equipment.
Will use heat flow equipment from OSU, need trawl wire for tethering heat flow equipment to ship.
|
|
|
|
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
Oregon State University multipenetration heat flow probe. |
|
