Ship Request

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  Marion Rise  -  2019  -  Thomas G. Thompson  
  Project Information  
Project Title: Collabortive Research: Thin Crust Over the Marion Rise: Remelting the Gondwanan Mantle Project Status: Submitted
Principal Investigator: Henry J. Dick, WHOI Project Institution: WHOI
Project ID: 105465 Version #: 4
Date Submitted: 8/10/2016 11:08:00 AM Created By: Henry J. Dick
Date Last Modified: 4/19/2019 9:14:00 AM URI Serial #: None
Funding Agencies: NSF/OCE/MGG - 1657983 - Funded
Summary of Field Work: This proposal is for a cruise to the Marion Platform at the crest of the Marion Rise on the SW Indian Ridge to test the hypothesis that it is supported by lateral heterogeneity produced by recycling different Gondwana mantle provinces; reflecting the pre-breakup lateral transition from Archaean Cratonic lithosphere to the west, to the Proterozoic East African Orogenic Belt (EAO) to the east. This is Leg 1, of a two Leg international program to study the platform, which extends from the Andrew Bain FZ ~2,000 km to the Gallieni FZ. Despite extreme controversial isotopic variability, this region is poorly surveyed, with potentially large exposed mantle domains (>1,000-km2), contrary to the accepted paradigm that rises are due to ridge-plume interaction and thick crust. Leg 1 will map and sample 2 key areas (39°-41.5°E & 43°-46°E) with high potential for exposed mantle and thin crust. 9.5 days of gravity, magnetics, and bathymetric surveys, and 14 days dredging will delineate mantle domains and major magmatic centers with extensive off-axis dredging. Funded German Leg 2 on RV Sonne includes expanded dredging and mapping to fill additional survey gaps, as well as ROV sampling and magnetics surveys of key areas. This will provide a basis for future seismic surveys. Post-cruise research includes petrographic, isotopic and major and trace element analysis of basalt and peridotite to determine the nature and origin of the mantle source and how it. Calculation of the mantle RMBA with the geochemically determined mantle density gradient will estimate the extent of serpentinization. This with the magnetization, dredging and bathymetry will be used to make a geologic map and interpret the tectonic evolution and crustal architecture of the Platform.
Summary of Facility Requirements: Magnetometer, gravimeter, multibeam, rock dredges. Cruise will have ~10 days of surveying ridge with co-registered bathymetry, magnetics, and gravity
Summary of other requirements and comments: none
Ship Request Identification
Type of Request: Primary Ship Use Request Status: Submitted
Request ID: 1008843 Created By: Henry J. Dick
Date Last Modified: 4/19/2019 9:14:00 AM Date Submitted: 8/10/2016 11:08:00 AM
Requested Ship, Operating Days and Dates
Year: 2019 Ship/Facility: Thomas G. Thompson
Optimum Start Date: 1/4/2019 Dates to Avoid: Need Austral Summer working at high southern latitudes between 39° and 44°S
Earliest Start Date: 10/16/2018 Multi-Ship Op: No
Latest Start Date: 3/1/2019 Other Ship(s): NA

Operating Days Needed: Science Days Mob Days De-Mob Days Estimated Transit Days Total Days
24 2 1 9 36
Repeating Cruise?
(within same year)
No Interval: 0 # of Cruises: 1

Description of Repeating cruise requirements: NA
Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations:
Need Austral summer due to weathering
Work Area for Cruise
Short Description of Op Area
for use in schedules:
Marion Rise
Description of Op Area: SW Indian Ridge between 39° & 46°E on the Marion Rise
Op Area Size/Dia.: 450 by 90
  Lat/Long Marsden Grid Navy Op Area
43° S / 39.4° E map
476 map
IN06 map
38.5° S / 46.7° E map
439 map
IN06 map
  Show Degrees Minutes    
Foreign Clearance and Permitting Requirements
Foreign Clearance Required? No 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.)
Port Calls
Requested Start Port Intermediate Port(s) Requested End Port
Cape Town, South Africa None, Durban, South Africa
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops
Closest ports to work area

 Important Info on Working in Foreign Ports

Science Party
Chief Scientist: Henry J. Dick, WHOI
# in Science Party 26 # of different science teams 1 # Marine Technicians to be
provided by ship operator:
(include in science party total)
Explanation of Science Party Requirements and Technician Requirements Need technicians to run magnetometer, gravimeter and seabeam systems, and run dredging operation,
Instrumentation Requirements That Impact Scheduling Decisions
Selected Dynamic PositioningUnselected ADCPSelected MultibeamUnselected Seismic
Selected Dredging/Coring/Large Dia. Trawl WireUnselected Stern A-frameUnselected Fiber Optic (.681)Unselected 0.680 Coax Wire
Unselected SCUBA DivingUnselected Radioisotope use - briefly describeUnselected NO Radioisotope use/Natural level workUnselected Other Operator Provided Inst. - Describe
0 PI-Provided Vans - briefly describe Unselected MOCNESS  
Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling.

need good coring winch with 90-m/min hauling and deploying speed

Major Ancillary Facilities (that require coordination of schedules with ship schedule)
Unselected Helicopter Ops (USCG)Unselected Twin OtterUnselected Unmanned Aerial Systems (UAS) 
Autonomous Underwater Vehicle (AUV)
Unselected Other AUVSelected Sentry  
Coring Facility
Unselected Jumbo Piston CoringUnselected Large Gravity Core Unselected MC800 multicorer w/ MISO camera/telemetryUnselected OSU Coring Facility (MARSSAM)
Unselected Other Large Coring FacilityUnselected WHOI Long Core  
Human Occupied Vehicle (HOV)
Unselected AlvinUnselected Clelia (HBOI)Unselected JSL I & II (HBOI)Unselected Other HOV
Other Facility
Unselected MISO Facility - deep-sea imagingUnselected Other FacilityUnselected Potential Fields Pool Equipment 
Remotely Operated Vehicle (ROV)
Unselected JasonUnselected Other ROV  
Seismic Facility
Unselected Ocean Bottom Seismograph Instrument Center (OBSIC)Unselected Ocean Bottom Seismograph Instrument Pool (OBSIP)Unselected Ocean-Bottom Seismometer Program (UTIG)Unselected Other Seismic/OBS Facility
Unselected PASSCALUnselected Portable MCS groupUnselected Portable MCS/SCS groupUnselected U.S. Geological Survey Ocean Bottom Seismometer Facility (USGS at WHOI)
Towed Underwater Vehicle
Unselected ARGO IIUnselected Hawaii MR1 (HMRG)Unselected IMI12 (HMRG)Unselected IMI120 (HMRG - formerly DSL 120A)
Unselected IMI30 (HMRG)Unselected Other Towed Underwater VehicleUnselected Towfish 
UNOLS Van Pool
Unselected AUV Lab Van #1Unselected Clean Lab VanUnselected Cold Lab VanUnselected General Purpose Lab Van
Unselected Radioisotope Lab VanUnselected Wet Lab Van  
UNOLS Winch Pool
Unselected Mooring SpoolerUnselected Portable WinchUnselected Turn Table 
Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems.
This request is for the use of SENTRY on an NSF Funded cruise to the Marion Rise with separate funding provided through the Woods Hole Oceanographic Institution to do high resolution mapping, magnetics, and side-scan on the SW Indian Ridge mapping the rift valley floor and adjacent rift mountains.
Summary of Facility Requirements: AUV SENTRY

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