Gofar TF Earthquakes

Ship

R/V Atlantis

Vehicles

Cruise Party

Mark Behn: Principal Investigator
Woods Hole Oceanographic Institution Clark 260B, MS#22 Woods Hole, Ma. USA 02543
+1 508 289 3637
mbehn@whoi.edu

John Collins: Chief Scientist, Principal Investigator
Organization Name USA
+1 508 289 2733
jcollins@whoi.edu

Wenyuan Fan: Principal Investigator
Florida State University USA
+1 850 644 6265
Wenyuan Fan

Jessica Warren: Principal Investigator, Chief Scientist
University of Delaware 255 Academy Street Newark, DE USA 19716
+1 302 831 8229
warrenj@udel.edu

Departure: San Diego, USA on Nov 16, 2019

Arrival: Manzanillo, Mexico on Dec 12, 2019

Mobilization Date: Nov 13, 2019

Demobilization Date: Dec 13, 2019

Supporting documentation:

»DeploymentSchedule.pdf

Operations Area: Gofar-Discovery-Quebrada Transform Faults, EPR

Lat/Lon: 4° 0.0′ S / 105° 0.0′ W

Depth Range: 2500 / 5000

Will the vessel be operating within 200 NM of a foreign country? no

Science objectives

The expedition consists of two activities:

1. Deployment of 51 OBS instruments on the Gofar Transform Fault. Deployments will occur for 16hrs per day and will take 11 days. The instruments will be left out for one year as part of a two year deployment.
2. Dredging at night (8hr) during the OBS deployment period, followed by 3 days of round-the-clock dredging. Dredging will be on Gofar, Discovery and Quebrada Transform Faults, starting in the area 106W, 4.6S and ending in the area 103W, 3.5S.

Science Activities

• Deployment of OBS instruments.
• Sampling via dredging.
• On board analysis of rocks, including cutting and describing.
• High-resolution multibeam to be collected when possible.

 

Pre-cruise planning meeting: Teleconference/Visit WHOI

Jessica Warren and John Collins will attend in person. Mark Behn may attend in person. The project lead, Margaret Boettcher, will call in from Australia (GMT+8). Our preferred meeting time is 9am to accommodate time zones.

Stations:

  Quebrada
  Distance: null
  Days: 3
  Latitude: 3° 30.0’ S
  Longitude: 103° 0.0’ W

  Gofar 3, Foreshock Zone
  Distance: 60
  Days: 5
  Latitude: 4° 33.0’ S
  Longitude: 106° 0.0’ W

  Gofar 1E, M6 Zone
  Distance: null
  Days: 6
  Latitude: 4° 30.0’ S
  Longitude: 104° 65.0’ W

Funding Agency: NSF #1832830, NSF #1833279, NSF #1832868, NSF #1832164

- added NSF #1832830 on Jul 1, 2019 11:55 AM by
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R/V Atlantis

Shipboard Equipment

Bathymetry System 12 kHz
Sippican XBT System (Mark 21)
12 kHz Pinger for Wire Use
Transponder Navigation - Sonardyne USBL
Navigation - Heading
Multibeam
Transducer well for visiting instrumentation
Navigation - Position
Crane

Shipboard Communication

Basic Internet access via HiSeasNet
Is there an expectation to use Skype or any other real-time video conference program?

CTD/Water Sampling

911+ Rosette 24-position, 10-liter bottle Rosette with dual T/C sensors
SBE43 oxygen sensor

Critical CTD Sensors: 

Sediment Sampling

Gravity corers
Rock dredges


Storage Notes: We will store rock samples on deck in wire baskets. The 6 baskets will be provided by WHOI.

Navigation

Will you be using Long Base Line (LBL) navigation? no

Will you be using Ultra-short baseline (USBL) navigation for other than Alvin operations? no

Navigation

GPS
USBL

Navigation Notes:

We will be using Ultra-short baseline (USBL) navigation for other than Alvin operations. (This question appears in the pdf created from this form, but the question is not available to answer on the form itself.)

Winches

Trawl Winch with 9/16th trawl wire
CTD Winch with .322" Electro-mechanical wire

Winch Notes: CTD winch will be used for OBS lowering.
Trawl winch will be used for dredging.
Need swivel for dredge.
Traction winch required for dredging.
Need 3 WHOI rock dredges.
Lee Ellett (SIO) is sending 3 SIO rock dredges with weaklinks.
We need 2 x 12 kHz Pinger for wire use (1 ready spare).
We would like confirmation of the condition of the winch ahead of the cruise. How recently has it been used? Where there any issues?

Wire use and application

CTD Winch with .322" Electro-mechanical wire


Wire Notes: We would like to confirm the condition of the wire:
What is the wire age?
When was the wire last pull tested?
When was the wire last unspooled to a seafloor depth of 5000 m, the maximum depth for our dredging?
Is the level wind working?

Slip ring required? no	Number of conductors:
Non-standard wire required? no	Type:
Traction winch required? no	Describe:

Other Science Vans:

Other Science Vans:

Science Van 1
Type/size: OBSIC Van		Location:
Water:		Power:

Specialized Deck Equipment

Mooring Deployment/Recovery Equipment Required: no	Type:
Cruise Specific Science Winch Required: no	Type:
Nets Required: no	Type:

Over the Side Equipment

Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? no

Special Requirements

Elecrical Power: yes	Identify: Rock saw on deck
Equipment Handling: no	Identify:
Inter/intraship Communications: no	Identify:
Science Stowage: yes	Identify: Stowage of equipment and samples to Panama or other safe port
Water: no	Identify:

Additional Cruise Items/Activities

Explosive Devices: no Portable Air Compressors: no Flammable Gases: no

Small Boat Operations: no SCUBA Diving Operations: no

Hazardous Material

Will hazardous material be utilized? no

Radioactive Material

Radioiosotopes: no

Additional Information

Is night time work anticipated on this cruise? yes

Specialized tech support (Seabeam, coring, other):  Dredging operations will be conducted at nighttime. OBS deployments may be conducted at night.
We have requested a UNOLS dredging technician and bosun support for nighttime deck operations.

Other required equipment and special needs:  Two rock saws, with spare blades and pumps.


Date Submitted: Jul 24, 2019 10:11 AM