High-resolution magnetic susceptibility of sediment cores from the New England collected on USGS Field Activity 2016-001-FA

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Frequently anticipated questions:


What does this data set describe?

Title:
High-resolution magnetic susceptibility of sediment cores from the New England collected on USGS Field Activity 2016-001-FA
Abstract:
Variability in sediment properties with depth and the thickness of individual sedimentary layers are critical determinants of seabed acoustic response. The New England Mud Patch (NEMP), located south of Cape Cod, is an unusual feature on the U.S. Continental Shelf in that it is composed of fine-grained sediment layers containing a relatively-homogeneous mix of sand, silt, and clay-sized particles bounded by more typical sandy shelf sediments. The unique characteristics and nature of this deposit is due to a derivation of sediments that have been transported to, and deposited in, a basal bowl-shaped depression since the last glacial maximum. Ninety-two piston, vibra-, and gravity cores with a maximum length of 8.2 meters were collected from across the New England Mud Patch during a 2-leg, 10-day cruise aboard the R/V Endeavor in the spring of 2016. Geologic characterization and analysis of a subset of the cores including grain size, CaCO3, mineral composition, and bulk index properties (undrained shear strength, water content, density, and porosity) of discrete samples was carried out at the USGS Woods Hole Coastal and Marine Science Center's (WHCMSC) Sediment Analysis Laboratory. This data release contains the results of these analyses, along with visual core descriptions and summary sheets for each core analyzed for this study.
Supplemental_Information:
Cores were collected on the 2016 R/V Endeavor cruise EN577 from April 19, 2016 to May 2, 2016. Information about this expedition, also known as USGS Field Activity 2016-001-FA, is available at https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-001-FA
  1. How might this data set be cited?
    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 20210819, High-resolution magnetic susceptibility of sediment cores from the New England collected on USGS Field Activity 2016-001-FA: data release DOI: 10.5066/P9ZYK3PX, U.S. Geological Survey, Coastal and Marine Hazards and Resources Program, Woods Hole Coastal and Marine Science Center, Woods Hole, MA.

    Online Links:

    This is part of the following larger work.

    Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey, Reston, VA.

    Online Links:

    Other_Citation_Details:
    Suggested citation: Boggess, A.A., Buczkowski, B.J., and Chaytor, J.D., 2021, Sedimentological and geotechnical analyses of marine sediment cores from the New England Mud Patch: U.S. Geological Survey data release, https://doi.org/10.5066/P9ZYK3PX.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -70.7979
    East_Bounding_Coordinate: -70.4370
    North_Bounding_Coordinate: 40.5952
    South_Bounding_Coordinate: 40.3058
  3. What does it look like?
    https://www.sciencebase.gov/catalog/file/get/60551febd34e1894882d0a86/?name=MudPatchCores_BrowseGraphic.png (PNG)
    Browse image of the core collection locations and spatial extent of the study area
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 19-Apr-2016
    Ending_Date: 02-May-2016
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    EN577_HRMS_PistonCores.csv
    High-resolution magnetic susceptibility data for mud patch piston cores. Point dataset, 11478 data records. (Source: Producer Defined)
    Core ID
    Core identification number assigned in field. Naming convention EN577-XXPC (EN577=Cruise ID) (XX=Core number) (PC=Piston Core) (Source: Producer Defined) character string
    Depth (cm)
    Depth of core at which the data point was scanned. (Source: Producer Defined)
    Range of values
    Minimum:1
    Maximum:802
    Units:centimeters
    Vol. Susc. in SI (x10^-6)
    Volume magnetic susceptibility using the international system of units (SI); ratio of the magnetization to the magnetic field of the system. Both magnetization and magnetic field strength are measured in amperes^-1, so volume susceptibility is a unitless quantity. (Source: Producer Defined)
    ValueDefinition
    -Indicates that an anomalous data point was omitted due to the presence of a known gap (core section end or void space that was previously noted in initial visual description), which prevented full coupling of sensor device and sediment surface.
    Range of values
    Minimum:-30.8578
    Maximum:98.9468
    Units:(unitless)
    EN577_HRMS_AcousticCores.csv
    High-resolution magnetic susceptibility data for mud patch acoustic/gravity cores. Point dataset, 1628 data records. (Source: Producer Defined)
    Core ID
    Core identification number assigned in field. Naming convention EN577-ACXX (AC=Acoustic Core) (EN577=Cruise ID) (XX=Core number) (Source: Producer Defined) character string
    Depth (cm)
    Depth of core at which the data point was scanned. (Source: Producer Defined)
    Range of values
    Minimum:1
    Maximum:231
    Units:centimeters
    Vol. Susc. Meas. (SI x 10-6)
    Volume magnetic susceptibility using the international system of units (SI); ratio of the magnetization to the magnetic field of the system. Both magnetization and magnetic field strength are measured in amperes^-1, so volume susceptibility is a unitless quantity. (Source: Producer Defined)
    ValueDefinition
    -Indicates that an anomalous data point was omitted due to the presence of a known gap (core section end or void space that was previously noted in initial visual description), which prevented full coupling of sensor device and sediment surface.
    Range of values
    Minimum:11.4950
    Maximum:99.0819
    Units:(unitless)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • A.A. Boggess
    • B.J. Buczkowski
    • J.D. Chaytor
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Jason Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov

Why was the data set created?

The data gained through the analyses of cores collected from the New England Mud Patch help provide a comprehensive understanding of the nature and properties of the sediments found in this geographic location. High-resolution magnetic susceptibility (HRMS) measurements were collected to determine the presence and abundance of ferromagnetic and paramagnetic minerals in the cores.

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: 2016 (process 1 of 5)
    Each core was cut into sections on the ship after collection. The cores were then split into halves back on shore. Person who carried out this activity:
    Jason Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov
    Date: 2020 (process 2 of 5)
    Data were collected using Bartington's probe software, Bartsoft for Windows version 4.2.1.2. A Bartington MS3 magnetic susceptibility (MS) meter with a MS2E surface point probe was used to take surface measurements of magnetic susceptibility at 1 cm intervals down sediment cores, starting at a depth of 1 cm. Drift correction measurements were collected every 30 cm to account for temperature change. Person who carried out this activity:
    Jason Chaytor
    U.S. Geological Survey, Northeast Region
    Research Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2351 (voice)
    jchaytor@usgs.gov
    Date: 2020 (process 3 of 5)
    Bartsoft software was used to export HRMS data for each core as a tab-delineated text file, which was imported into Microsoft Excel 2008 for data processing. Data from gaps in the core (e.g., core section ends), where full coupling between the sensor and the sediment could not be achieved, were removed from the results. Each core's data were saved as a CSV file. Person who carried out this activity:
    Allyson A Boggess
    U.S. Geological Survey, NORTHEAST REGION
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2341 (voice)
    508-457-2310 (FAX)
    aboggess@usgs.gov
    Date: 2020 (process 4 of 5)
    Each core's individual HRMS data were compiled into two CSV spreadsheets, each pertaining to one core type: piston cores and acoustic/gravity cores. Person who carried out this activity:
    Allyson A Boggess
    U.S. Geological Survey, NORTHEAST REGION
    Geologist
    384 Woods Hole Road
    Woods Hole, MA
    US

    508-548-8700 x2341 (voice)
    508-457-2310 (FAX)
    aboggess@usgs.gov
    Date: 17-Nov-2021 (process 5 of 5)
    Tweaked a thesaurus name (20211117). Person who carried out this activity:
    U.S. Geological Survey
    Attn: VeeAnn A. Cross
    Marine Geologist
    384 Woods Hole Road
    Woods Hole, MA

    508-548-8700 x2251 (voice)
    508-457-2310 (FAX)
    vatnipp@usgs.gov
  3. What similar or related data should the user be aware of?
    Chaytor, Jason D., Ballard, Megan S., Buczkowski, Brian J., Goff, John A., Lee, Kevin M., Reed, Allen H., and Boggess, Allyson A., 2021, Measurements of Geologic Characteristics and Geophysical Properties of Sediments from the New England Mud Patch: IEEE Oceanic Engineering Society, Piscataway, NJ.

    Online Links:

    Other_Citation_Details:
    This journal article is the publication supported by this data release.

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

  1. How well have the observations been checked?
    Drift correction, a measurement of background air to account for any change in sample temperature during the scanning process, was performed every 30 cm down each core.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Of the 98 total cores collected during the R/V Endeavor EN577 cruise, 19 piston cores and 9 acoustic/gravity cores were scanned for high-resolution magnetic susceptibility. Cores chosen for analysis were those that were thought to represent the full range of sediments expected to be encountered. Any cores omitted from analysis were not included because the coring locations were in close proximity to previously analyzed cores. Data from known gaps in the core (e.g., core section ends), where full coupling between the sensor and the sediment could not be achieved, were removed from the results.
  5. How consistent are the relationships among the observations, including topology?
    Magnetic susceptibility data are consistent with expected values according to components and visual observations of sediment cores.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None.
Use_Constraints:
Not to be used for navigation. The public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey as the originator of the dataset.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey - ScienceBase
    Denver Federal Center, Building 810, Mail Stop 302
    Denver, CO
    United States

    1-888-275-8747 (voice)
    sciencebase@usgs.gov
  2. What's the catalog number I need to order this data set? The dataset includes the data files (EN577_HRMS_PistonCores.csv, EN577_HRMS_AcousticCores.csv), the browse graphic (MudPatchCores_BrowseGraphic.png) and the FGDC CSDGM metadata in XML format (EN577_HRMS_Metadata.xml).
  3. What legal disclaimers am I supposed to read?
    Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 17-Nov-2021
Metadata author:
Allyson A Boggess
U.S. Geological Survey, NORTHEAST REGION
Geologist
384 Woods Hole Road
Woods Hole, MA
US

508-548-8700 x2341 (voice)
508-457-2310 (FAX)
aboggess@usgs.gov
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://cmgds.marine.usgs.gov/catalog/whcmsc/SB_data_release/DR_P9ZYK3PX/EN577_HRMS_Metadata.faq.html>
Generated by mp version 2.9.50 on Thu Nov 18 14:49:53 2021