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USGS Coastal and Marine Geology Program

Field Activity Details for field activity C194WF

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AKA: none

Other ID: C-1-94-WF,Dive 781

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center

Funding Program(s): Crustal Deformation Study (MU076)

Principal Investigator(s): Jan Morton, Carol Reiss

Affiliate Investigator(s):

Information Specialist(s):

Data Type(s): Imagery: Video, Environmental Data: CTD, Sonar: Single Beam, Location-Elevation: Navigation, Location-Elevation: Transects, Imagery: Photo, Sampling: Biology, Sampling: Chemistry, Sampling: Geology

Scientific Purpose/Goals: Measuring sea floor spreading acoustically, using dual frequency smart transponders

Vehicle(s):

Start Port/Location: Coos Bay, OR

End Port/Location: Coos Bay, OR

Start Date: 1994-08-17

End Date: 1994-08-25

Equipment Used: underwatertelevision, CTD, bathymetry, transitsatellite, bottomtransponder, submersible (Turtle)

Information to be Derived:

Summary of Activity and Data Gathered: Carol Reiss (Co-Chief), Stephanie Ross, and Tracy Vallier returned August 26, 1994 from a successful cruise to the southern Juan de Fuca Ridge, onboard the DSVSS LANEY CHOUEST, support ship to the DSV Turtle, and ATV (Advanced Tethered Vehicle). The Turtle and ATV are U.S. Navy owned and operated vehicles of the Deep Submergence Group One. Considerable planning, great weather, and hard work enabled us to successfully reposition several instruments that were previously deployed in 1992. A total of four tripods with dual frequency transponders were initially deployed across the axis of the spreading ridge to determine the rate and tectonic/volcanic relationship of plate separation using acoustic instruments. Two DVS Turtle dives and four ATV dives accomplished the complex task of repositioning two tripods, recovering a damaged transponder, and completing a detailed geologic reconnaisance (inclunding CTD casts) between and around the tripods. SeaBeam bathymetric data was collected during the transit between the Coos Bay, OR., and the Juan de Fuca Ridge. The cruise was funded by NURP (National Underwater Research Proogram) through the West Coast National Undersea Research Center, University of Alaska, Fairbanks. Future efforts will include annual site visits to retrieve range data from the transponders, as well as additional instrument deployments to extend the experiment to include older faults and fissures along the Juan de Fuca Ridge.

Staff: Stephanie Ross, Tracy Vallier

Affiliate Staff:

Notes: Locations 1-4 are the tripod locations of the dual frequency transponders deployed on C-1-92-WF. Data Inventory folder contains: Oceano SI printout (2 stacks), daily report 9pgs., ATV Camera and operations logs; 781-94-14 Turtle dive folder (communications log, nav plot, printout, and floppy nav); 782-94-15 Turtle dive folder (communications log, nav plot, printout, and floppy nav); 94-39-83 ATV folder (2 plots, printout and floppy); 94-40-84 ATV folder (1 plot, printout and floppy); 94-41-85 ATV folder (3 plots, 2 printouts and floppy); 94-42-86 ATV folder combined with 94-41-85 folder; 3.5" PC floppies (2 NS011 travel time data 4" Compac Tapes; 3 SeaBeam bathymetric data; maps; VHS tapes (94-39-83 ATV 3 of 3, 94-40-84 ATV 3 of 3, 94-41-85 ATV 5 of 5, 94-42-86 ATV 2 of 2); Hi 8 tapes (781-94-14 Turtle 5 of 5, 782-94-15 Turtle 6 of 6, 94-39-83 ATV 3 of 3, 94-40-84 ATV 5 of 5, 94-41-85 ATV 8 of 8, 94-42-86 ATV 2 of 2, Hand held on deck recording of ship activities 1 of 1).

Staff information imported from InfoBank
Jan Morton (USGS Western Region) - Chief Scientist
Carol Reiss (USGS Western Region) - Chief Scientist
Stephanie Ross (USGS Western Region) - Unspecified Investigator
Tracy Vallier (USGS Western Region) - Unspecified Investigator

Location:

Juan de Fuca Ridge

Boundaries
North: 44.67288 South: 44.66453 West: -130.3641 East: -130.35233

Platform(s):

photo of Laney Chouest
Laney Chouest

Publications

Portals/Viewers

Data Acquired

Survey EquipmentSurvey InfoData Type(s)Data Collected
underwatertelevision --- Video
CTD --- Surveys (geochemical)
Experiments (geochemical)
CTD
bathymetry --- Single Beam
transitsatellite --- Navigation
bottomtransponder --- Transects
submersible (Turtle) --- Photo
Video
Biology
Chemistry
Geology

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