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What does this data set describe?

Title:
Geological data of field activity W-4-09-WO in Pacific Northwest, Oregon to Canadian border: Hydrate Ridge, Barkley Canyon,and Bullseye Vent from 08/05/2009 to 08/11/2009
Abstract:
Monterey Bay Aquarium Research Institute,United States Geological Survey, Menlo Park, California. Chief Scientist: Charlie Paull (MBARI). Geological data of field activity W-4-09-WO in Pacific Northwest, Oregon to Canadian border: Hydrate Ridge, Barkley Canyon,and Bullseye Vent from 08/05/2009 to 08/11/2009, <http://walrus.wr.usgs.gov/infobank/w/w409wo/html/w-4-09-wo.meta.html>.
Supplemental_Information:

Notes -
Our AUV mapping and ROV diving operations associated with MBARI’s northern expedition this summer are focused on investigatingknown gas vents, chemosynthetic biological communities (CBC), and gas hydrate bearing sites along the North American margin. The plans for the expedition involve collecting a series of AUV mapping surveys from the R/V Zephyr at four sites. This data will then be used to direct Doc Ricketts dives to ground truth the mapping surveys and to help direct the design of other experiments and installations. Among sites include the two summits of Hydrate Ridge
(Oregon), Bullseye Vent (Canada), and Barkley Canyon (Canada). These sites continue to be targets for exploration and experimentation by researchers at MBARI and many other institutions.
The installation of a seafloor observatory to monitor natural variations in gas and gas hydrate dynamics and to conduct perturbation experiments remains one of the most supported concepts within the various Ocean Observing Initiative efforts. The planned sites for the installation of gas hydrate observatories, as part of NEPTUNE Canada (including future capacity to include an IODP CORK), are Bullseye vent and Barkley
Canyon. The other candidate for a cable-connected system is Hydrate Ridge. While an initial deployment of instruments is planned for NEPTUNE Canada in 2009, detailed high-resolution mapping is still lacking in parts of these areas and is necessary for the long-term planning for expansion of hydrate observatory infrastructure. This can be best (and perhaps only) provided with a system like the MBARI mapping AUV.
A particular focus of this expedition is the nature and origin of the micro-topography associated with these gas-rich seafloor environments. Visual observations in many such environments have already shown that the seafloor where CBCs are on the surface and gas hydrate are believed to be in the near subsurface is commonly associated with seafloor blisters or mounds of various sizes, shallow depressions (e.g., ~3 m wide and ~1 m deep), as well as an occasional small up-turned ridge of truncated strata. The origin of this topography remains unexplained, yet is potentially critical for assessing the extent to which gas hydrates are geo-hazards and to understand how gas hydrates may shape the seafloor. Moreover, up-to-date maps that document these features do not exist, largely because of the limitations of previously available surveying tools. We are interested in documenting these features and evaluating two possible processes that may play a role in creating these features:
(a) The area around these vents may be experiencing seafloor modification because
of gas hydrate growth. Subsurface gas hydrate formation may inflate the seafloor producing pingo-like features that range from 1 to 10 m in height and width. When sections of seafloor contain >92% gas hydrate by volume they are buoyant in seawater.
Thus, gas hydrate-bearing sediment masses may break loose from the seafloor and float away, leaving depressions on the seafloor (Paull et al., 1996). Repeat visits with an ROV or HOV to vent sites in the Gulf of Mexico (Roberts et al., 2001) and Barkley Canyon
(Ross Chapman, personal communication) have shown that gas hydrate mounds observed in previous years have disappeared, apparently leaving holes. Presently, it is unknown whether these changes are of a magnitude that will be within the resolution of the
mapping tools on the AUV.
(b) We will also focus on documenting the extent and importance of seafloor erosion on the flanks of these structures. Occurrences of carbonate-cemented nodules and concretions exposed on the seafloor that contain cements with light carbon isotopes, indicating a contribution of methane-derived carbon, are commonly interpreted to be indicators of seafloor fluid venting and occur around all these vent systems. However, the fine-grained clastic sediments that typically host these carbonates indicate that many, if not most, of these carbonates were formed within the subsurface, presumably associated with anaerobic oxidation of methane at the sulfate-methane transition zone. We hypothesize that the widespread occurrence of these carbonates on the seafloor may result from persistent seafloor erosion, which preferentially removes the uncemented sediments and leaves the more resistant, cemented sediments standing in relief. Combined multibeam bathymetry, sub-bottom profiling, and side-scan sonar data obtained by the mapping AUV will provide a basic context to understand the nature of these systems and the broad area around them. ROV ground truth sampling also will be required to evaluate these questions.
An MBARI mapping AUV survey was conducted at Barkley Canyon in 2007.
However, we are interested in returning, in part, to assess whether any changes in the morphology can be quantified and to refine and enlarge the existing survey coverage.
The existing schedule allows for up to 7 18-hour long AUV mapping survey missions. We have scheduled this as 2 at Hydrate Ridge (44° 34’N 125° 09’W); 2 at Bullseye vent (48° 41’ N 126° 51’W); 2 at Barkley Canyon (48° 19’N, 126° 04 W); and one as a contingency. These would be followed by a 10-day Western Flyer expedition out of Newport, Oregon, to ground truth these survey areas. We intend to work with Ross Chapman (University of Victoria) on the Barkley Canyon surveys and Michael Riedel (McGill University) on the Bullseye vent surveys, both as a scientific collaboration and to assist in plans for the installation of Neptune observatories.
The day-by-day plan for this trip will be highly dependant on the weather and the results of the AUV survey’s. However, it is likely that we will dive on Hydrate Ridge the first day, as it will make logistical sense. On this dive we will focus on sampling up the side of the feature called the Pinnacle which has that has been described as an upward growing chemoherm (e.g., Teicher et al., 2005), but we hypothesis it is an erosional feature (Paull and Ussler, 2008).
At Barkley canyon we anticipate picking up some gear of Ross Chapman’s. At Bulleye Vent we expect to deploy an Osmo-sampler probe that is to be stuck into the sediment. This probe is designed by Laura Lapham. We believe that this is of a size that will allow it to be carried on the Doc Ricketts.
Publications -
____, 2009, 2009 Pacific Northwest expedition leg 3
Monterey Bay Aquarium Research Institute, accessed 22 October 2009, URL:
<A HREF="<http://www.mbari.org/expeditions/Northern09/L3/index_L3.htm>" target="MBARI"><http://www.mbari.org/expeditions/Northern09/L3/index_L3.htm>

Similar information is available for thousands of other USGS/CMG-related Activities.
If known, available are Activity-specific navigation, gravity, magnetics, bathymetry, seismic, and sampling data; track maps; and equipment information; as well as summary overviews, crew lists, and information about analog materials.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at:
<http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Primary access to the USGS/CMG Information Bank's digital data, analog data, and metadata is provided through... <http://walrus.wr.usgs.gov/infobank/>
This page accomodates a variety of search approaches (e.g., by platform, by region, by scientist, by equipment type, etc.).
  1. How should this data set be cited?

    U.S. Geological Survey (USGS) <http://www.usgs.gov/>, Coastal and Marine Geology Program (CMGP) <http://marine.usgs.gov/>, 20131030, Geological data of field activity W-4-09-WO in Pacific Northwest, Oregon to Canadian border: Hydrate Ridge, Barkley Canyon,and Bullseye Vent from 08/05/2009 to 08/11/2009: U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -126.90771
    East_Bounding_Coordinate: -126.06196
    North_Bounding_Coordinate: 48.71552
    South_Bounding_Coordinate: 48.30668

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 05-Aug-2009
    Ending_Date: 11-Aug-2009
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      Indirect_Spatial_Reference:
      Pacific Northwest, Oregon to Canadian border: Hydrate Ridge, Barkley Canyon,
      This is a Point data set. It contains the following vector data types (SDTS terminology):
      • Point

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257.

      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 0.1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Attribute values


  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    Navigation with Time Stamp <http://walrus.wr.usgs.gov/infobank/programs/html/definition/nav.html>


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Charlie Paull); Bill Ussler); Michael Riedel); Mary McGann); Laura Lapham); Tessie Menotti); Yireng Cho)

  3. To whom should users address questions about the data?

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>


Why was the data set created?

These data and information are intended for science researchers, students from elementary through college, policy makers, and general public.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 16-Oct-2009 (process 1 of 1)
    Navigation Data
    /infobank/w/w409wo/nav/w-4-09-wo.060
    time/lat/long style, multi-record, in caps, without tabs
    temporal-spatial data
    
    Input was...
    /infobank/w/w409WO/samp/w-4-09-WO.onoff.vibratingcore
    time/lat/long style, multi-record, in caps, without tabs
    temporal domain
    Reformatted from Mary McGann's Excel spreadsheet, DR59-DR69.xls, that has these columns:
    Dive_and_Core, Dive, Core, Date, Time_GMT, Depth_m, Longitude, Latitude, FACS_ID, Length_cm, WaypointName, Comment
           1         2         3
    345678901234567890123456789012345
    
    

    Person who carried out this activity:

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

  3. What similar or related data should the user be aware of?

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Unknown, USGS/CMG Information Bank <http://walrus.wr.usgs.gov/infobank/>: U.S. Geological Survey (USGS) <http://www.usgs.gov> Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>, Menlo Park, CA.

    Online Links:

    Other_Citation_Details:
    ____, 2009, 2009 Pacific Northwest expedition leg 3 Monterey Bay Aquarium Research Institute, accessed 22 October 2009, URL: <A HREF="<http://www.mbari.org/expeditions/Northern09/L3/index_L3.htm>" target="MBARI"><http://www.mbari.org/expeditions/Northern09/L3/index_L3.htm>



How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Identified as best available version.

  2. How accurate are the geographic locations?

    Unspecified

  3. How accurate are the heights or depths?

    Unspecified

  4. Where are the gaps in the data? What is missing?

    Start and end date/times of data

    Navigation Data (w-4-09-wo.060 [GPS])
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    200908051654540    200908051654540
    200908051740290    200908051740290
    200908051931290    200908051931290
    200908052048130    200908052048130
    200908060021480    200908060021480
    200908061443290    200908061443290
    200908061520530    200908061520530
    200908061548190    200908061548190
    200908061619470    200908061619470
    200908061642470    200908061642470
    200908061926320    200908061926320
    200908061954220    200908061954220
    200908062013470    200908062013470
    200908062040340    200908062040340
    200908062111000    200908062111000
    200908071542250    200908071542250
    200908071614500    200908071614500
    200908071708170    200908071708170
    200908071747090    200908071747090
    200908071821390    200908071821390
    200908072306020    200908072306020
    200908072347150    200908072347150
    200908080004120    200908080004120
    200908081723210    200908081723210
    200908081832040    200908081832040
    200908082022570    200908082022570
    200908082117170    200908082117170
    200908091530190    200908091530190
    200908091755030    200908091755030
    200908091835570    200908091835570
    200908091950060    200908091950060
    200908092010080    200908092010080
    200908092302200    200908092302200
    200908092346030    200908092346030
    200908092359560    200908092359560
    200908100021130    200908100021130
    200908100038230    200908100038230
    200908101437160    200908101437160
    200908101449140    200908101449140
    200908101522230    200908101522230
    200908101739410    200908101739410
    200908101852220    200908101852220
    200908101927490    200908101927490
    200908102215160    200908102215160
    200908102346580    200908102346580
    200908111507440    200908111507440
    200908111532470    200908111532470
    200908111556260    200908111556260
    200908111625280    200908111625280
    YYYYMMDDHHMMSST    YYYYMMDDHHMMSST
    

  5. How consistent are the relationships among the observations, including topology?

    Unspecified


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Physical materials are under controlled on-site access.
If available, access to physical samples is described in the "WR CMG Sample Distribution Policy" at: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
Use_Constraints:
Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Physical materials are under controlled on-site access.
Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

  2. What's the catalog number I need to order this data set?

    Downloadable Data W-4-09-WO data set <http://walrus.wr.usgs.gov/infobank/w/w409wo/html/w-4-09-wo.meta.html>

  3. What legal disclaimers am I supposed to read?

    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
    Physical materials are under controlled on-site access.
    Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
    This information is not intended for navigational purposes.
    Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  4. How can I download or order the data?

    • Availability in digital form:

Data format: ASCII Size: 0.1
Network links: <http://walrus.wr.usgs.gov/infobank/w/w409wo/html/w-4-09-wo.nav.html>

  • Cost to order the data: None


  • Who wrote the metadata?

    Dates:
    Last modified: 30-Oct-2013
    Metadata author:
    U.S. Geological Survey (USGS) <http://www.usgs.gov>, Coastal and Marine Geology (CMG) <http://walrus.wr.usgs.gov>
    Attn: Clint Steele <http://walrus.wr.usgs.gov/staff/csteele.html>
    InfoBank Group Leader <http://walrus.wr.usgs.gov/staff/csteele.html>
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA 94025-3561
    USA

    (650) 329-5055 (voice)
    (650) 329-5190 (FAX)
    infobank@octopus.wr.usgs.gov <mailto:infobank@octopus.wr.usgs.gov>

    Metadata standard:
    FGDC Content Standards for Digital Geospatial Metadata <http://www.fgdc.gov/> (FGDC-STD-001-1998 <http://www.its.nbs.gov/nbs/meta/meta.html>)


    Generated by mp version 2.9.13 on Wed Oct 30 08:53:49 2013