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Old Rurutu hotspot
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2012
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Melville
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Project Title: |
Collaborative Research: Using the Rurutu hotspot to evaluate mantle motion and absolute plate motion models |
Project Status: |
Submitted |
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Principal Investigator: |
Jasper Konter, UH_SOEST |
Project Institution: |
UTEP |
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Project ID: |
103037 |
Version #: |
1 |
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Date Submitted: |
8/4/2011 3:13:00 PM |
Created By: |
Jasper Konter |
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Date Last Modified: |
6/13/2012 2:11:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/MGG - 1153959 - Funded |
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Summary of Field Work: |
We propose to obtain new age and geochemical data for the critical region around the poorly characterized Rurutu hotspot bend. This data will help define a third Pacific hotspot track that will help deconvolve plate from plume motions between 40 and 80 Ma. Specifically, we propose to test the following two hypotheses: (1) The Rurutu hotspot is a long-lived, geochemically-distinct hotspot like the Hawaiian and Louisville hotspots; and (2) the Rurutu hotspot exhibits a pronounced bend, and the timing of the Rurutu bend matches the timing of the (pronounced) Hawaii-Emperor and (less pronounced) Louisville bends at ~50 Ma. To test these hypotheses we propose to: (1) Dredge 20 key volcanoes at the Rurutu hotspot bend--defined by the intersection of the Tuvalu and Samoa chains--to determine its precise location and timing; (2) Geochemically characterize 60 samples to evaluate a link to the modern-day Rurutu hotspot; (3) Compare the predicted Rurutu age progression from various APM models to 45 new 40Ar/39Ar ages to be measured from these seamounts. |
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Summary of Facility Requirements: |
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Summary of other requirements and comments: |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1004748 |
Created By: |
Jasper Konter |
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Date Last Modified: |
8/4/2011 3:13:00 PM |
Date Submitted: |
8/4/2011 3:13:00 PM |
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Year: |
2012
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Ship/Facility: |
Melville
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Optimum Start Date:
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8/1/2012 |
Dates to Avoid: |
November through April is officially hurricane season around Samoa, so we would prefer a summer, early fall, or late spring schedule. Large swell from large storms affect the possible headings for dredging operations. |
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Earliest Start Date: |
8/1/2011 |
Multi-Ship Op: |
No |
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Latest Start Date: |
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Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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31 |
0 |
0 |
0 |
31 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
We have chosen Melville because of its excellent multibeam performance in rough seas, and our and the crew's dredging experience on this ship. However, Revelle or Kilo Moana would be good alternatives. |
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Short Description of Op Area
for use in schedules: |
Tuvalu/Samoa |
| Description of Op Area: |
This cruise focusses on dredging the slopes of major seamounts and islands along the Tuvalu Islands, and along the seamounts west of Samoa. |
| Op Area Size/Dia.: |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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Ending
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Show Degrees Minutes |
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Foreign Clearance Required? |
Yes |
Coastal States:
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 Important Info on Foreign Research Clearances
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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)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Majuro Atoll, Marshall Islands |
None |
Apia, Western Samoa |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
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Important Info on Working in Foreign Ports
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Chief Scientist: |
Jasper Konter, UH_SOEST |
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# in Science Party |
15 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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2 |
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Explanation of Science Party Requirements and Technician Requirements |
This is a dredging and multibeam mapping cruise, thus we request two experienced dredging technicians for around the clock dredging operations. |
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 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 | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
We need a ship that has good multibeam performance under sometimes rough sea conditions in order to identify dredge targets. Dredging will also be challenging in the same weather conditions, so we request spare equipment including multiple dredges in order to successfully finish this dredging cruise. We also will collect magnetics. In addition, we will need some space to store the dredged rock samples (likely 2-3 pallets worth)
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
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