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oceanic hotspots
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2020
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Roger Revelle
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Project Title: |
Origin of highly heterogeneous Strontium Isotopic Ratio in melt inclusions from oceanic hotspot lavas |
Project Status: |
Submitted |
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Principal Investigator: |
Matthew G. Jackson, UCSB |
Project Institution: |
UCSB |
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Project ID: |
106658 |
Version #: |
1 |
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Date Submitted: |
11/7/2019 5:18:00 AM |
Created By: |
Matthew G. Jackson |
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Date Last Modified: |
3/20/2020 6:30:00 PM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/MGG - 2006191 - Funded |
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Summary of Field Work: |
This projects aims to characterize seamounts and volcanoes in the Cook Islands for their
original age and chemical composition (of the rocks).
The work at-sea will consist of multibeam mapping and rock dredging of seamounts and
islands in the Cooks Islands. The work will focus on using the multibeam system to locate
potential dredging locations, based on mapped topography, and the intensity of backscattered energy from the multibeam system. The most promising site will be targeted for rock dredging; due to the coral reefs on the target seamounts, dredging will focus on the
deep flanks of the seamounts, between 5-3km depth. We plan to target at least 4
seamounts/islands, mapping and dredging, in 24 hour operations. |
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Summary of Facility Requirements: |
It is important that both ship operator-provided technicians aboard the ship are dredging afficionados so that we can carry out around-the-clock operations, as we will have only 48 hours on site to conduct 4 dredges.
We will need a winch and wire for dredging operations, with ~10 km of wire.
Dredging will be challenging in some weather conditions, so we request spare equipment, including multiple pingers, and at least 3 rock dredges. It is important to have at least 4 burlap sacks for lining the dredge basket (to capture small samples so they don't slip through the chain mesh). We will also require a functional rocksaw and replacement blade.
Furthermore, we will need space to store the collected dredged rocks (likely 2 pallets worth). |
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Summary of other requirements and comments: |
We will require sufficient lab-table space to process and dry rock samples from 4 dredges. |
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Type of Request: |
Collaborative Ship Use |
Request Status: |
Submitted |
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Request ID: |
1010743 |
Created By: |
Matthew G. Jackson |
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Date Last Modified: |
2/10/2020 8:14:00 PM |
Date Submitted: |
11/7/2019 5:18:00 AM |
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Year: |
2020
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Ship/Facility: |
Roger Revelle
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Optimum Start Date:
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12/9/2020 |
Dates to Avoid: |
The cruise is schedule so this is not relevant. |
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Earliest Start Date: |
12/9/2020 |
Multi-Ship Op: |
No |
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Latest Start Date: |
12/9/2020 |
Other Ship(s): |
The cruise is schedule so this is not relevant. |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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2 |
0 |
0 |
2 |
4 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
there are not repeating cruise schedule intervals, so this is not relevant. |
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
This shiptime request is a collaborative ship use that will "piggyback" on an existing NSFfunded OBS recovery cruise aboard the R/V Revelle, which is scheduled to transit near the Cook Islands in December 2020 (the OBS-recovery cruise is funded by OCE Grant #1658491, “Collaborative Research: Imaging small-scale convection and structure of the mantle in the South Pacific: A US contribution to an international PacificArray”). This OBS-recovery cruise is tentatively scheduled as follows***:
Gaherty, J/LDEO PacificArray 1658491 31/NSF-OCE-MGG/F
----------------------- -------------------- ---------------- ------------------
Load: 09 Dec 20 So. Pac.
Dep: 11 Dec 20 Papeete SP05 33S/158W James B. Gaherty 27/31
Arr: 06 Jan 21 Auckland SP05 36S/152W
Unld: 08 Jan 21
Clearances: New Zealand(T), French Polynesia(T)
***Note that the shiptime request would add 4 days (2 transit days + 2 science days) to this cruise so that the Revelle arrives in Aukland 10 Jan 21 and unloads on 12 Jan 21. |
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Short Description of Op Area
for use in schedules: |
Cook Islands |
| Description of Op Area: |
We will be operating (dredging and mapping) between Rarotonga and Mangaia Island in the Cook Islands. |
| Op Area Size/Dia.: |
70 nautical mile dia. |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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21° 18' S
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160° 0' W
map
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Ending
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22° 0' S
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157° 30' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
Yes |
Coastal States:
Cook Islands |
 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.) |
I have been in touch with the Director of the Cook Islands Natural Heritage Trust, which requires that I submit an application to conduct scientific work in the Cook Islands (this is in addition to any foreign ship clearances that the Ship Operator requests through the State Department). The Director is a fan of our research, and has assured me that we will easily obtain the necessary permissions. |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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Papeete, Tahiti, French Polynesia |
None |
Auckland, New Zealand |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
These are the Start Port and End Port locations for the OBS-recovery cruise (i.e., “Collaborative Research: Imaging small-scale convection and structure of the mantle in the South Pacific: A US contribution to an international PacificArray”) on which we will be piggybacking. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Matthew G. Jackson, UCSB |
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# in Science Party |
2 |
# 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 |
It is important that both operator provided technicians aboard the ship are proficient in dredging so that we can carry out around-the-clock operations, as we will have only 48 hours on site to conduct 4 dredges. Therefore we request 2 operator provided technicians, otherwise we will lose significant science time. |
|
 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. |
The ship (Revelle) is already scheduled, so this is not relevant.
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
We will need a winch and wire for dredging operations, with ~10 km of wire.
Dredging will be challenging in some weather conditions, so we request spare equipment, including multiple pingers, and at least 2 rock dredges (with materials to make a 3rd dredge). It is important to have at least 4 burlap sacks for lining the dredge basket (to capture small samples so they don't slip through the chain mesh).
We will also require a functional rocksaw and replacement blade. |
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