Rock strength properties of the Haines-Takshanuk Mountains-Chilkat Peninsula area statemap project, Southeast Alaska

Metadata also available as - [Parseable text] - [XML]

Frequently anticipated questions:


What does this data set describe?

Title:
Rock strength properties of the Haines-Takshanuk Mountains-Chilkat Peninsula area statemap project, Southeast Alaska
Abstract:
Rock strength properties of the Haines-Takshanuk Mountains-Chilkat Peninsula area statemap project, Southeast Alaska, Raw Data File 2024-28, provides Schmidt hammer testing data from selected in situ rock outcrops and unconfined compressive testing data of selected rock cores. This data release is part of a larger project developed in response to the deadly December 2, 2020 landslide in Haines, Alaska. The project area includes portions of the Skagway A-1, A-2, B-1, B-2, and B-3 15-minute quadrangles, an area of approximately 777 square kilometers and produced a 50,000-scale bedrock and surficial geologic map of the Haines Takshanuk Mountains-Chilkat Peninsula area of Southeast Alaska. These data and report are available from the DGGS website: http://doi.org/10.14509/31416.
Supplemental_Information:
schmidt-hammer-testing:    A table of field station locations and Schmidt hammer testing results from rock outcrops in selected field station locations, along with an accompanying data dictionary.	
ucs-testing-data:    A table of field station locations and unconfined compressive strength (UCS) test results from samples from rock outcrops in selected field station locations, along with an accompanying data dictionary.
  1. How might this data set be cited?
    Nicolazzo, J.A., Darrow, M.M., Larsen, M.C., and Walser, S.L., 2024, Rock strength properties of the Haines-Takshanuk Mountains-Chilkat Peninsula area statemap project, Southeast Alaska: Raw Data File RDF 2024-28, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -135.847340
    East_Bounding_Coordinate: -135.390240
    North_Bounding_Coordinate: 59.420860
    South_Bounding_Coordinate: 59.176690
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 2023
    Ending_Date: 2024
    Currentness_Reference:
    ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: csv
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a point data set.
    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 0.0000001. Longitudes are given to the nearest 0.0000001. Latitude and longitude values are specified in decimal degrees. The horizontal datum used is WGS84.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.
  7. How does the data set describe geographic features?
    rdf2024-28-schmidt-hammer-testing.csv, rdf2024-28-schmidt-hammer-testing-data-dictionary.csv
    A table of field station locations and Schmidt hammer testing results from rock outcrops in selected field station locations, along with an accompanying data dictionary. (Source: DGGS, see report for additional detail)
    rdf2024-28-ucs-testing-data.csv, rdf2024-28-ucs-testing-data-dictionary.csv
    A table of field station locations and unconfined compressive strength (UCS) test results from samples from rock outcrops in selected field station locations, along with an accompanying data dictionary. (Source: DGGS, see report for additional detail)

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?
    This project was funded by the U.S. Geological Survey, National Cooperative Geologic Mapping Program under STATEMAP award number G22AC00606, 2022, and the State of Alaska General Fund. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey or by any branch or employee of the State of Alaska.
  3. To whom should users address questions about the data?
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.

Why was the data set created?

During the 2023 summer field season, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted fieldwork supporting surficial and bedrock mapping for the Haines-Takshanuk Mountains-Chilkat Peninsula area STATEMAP project. This publication serves as an archive of Schmidt hammer testing and unconfined compressive testing results from selected rock cores and supports research discussion and collaboration.

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: 2023 (process 1 of 3)
    Sample collection - In August of 2023, field teams from the Alaska Division of Geological & Geophysical Surveys (DGGS) and the University of Alaska Fairbanks (UAF) conducted Schmidt hammer testing on 30 rock outcrops at selected field station locations and collected rock samples from four locations for unconfined compressive strength (UCS) testing. We recorded location information using GPS-enabled tablets running Esri's ArcGIS Field Maps app, with a reported horizontal error of approximately 5 to 10 meters. Latitude and longitude are reported in the WGS84 coordinate system.
    Date: 2023 (process 2 of 3)
    Schmidt hammer testing - The hammer is pressed perpendicularly against the concrete or rock surface until the spring-loaded piston rebounds. The rebound values displayed on the scale can be correlated to compressive strength using a conversion chart. We used Schmidt hammer types L and N, specifically designed explicitly for rocks and manufactured by Proceq, at each selected outcrop to assess the compressive strength of the rock. We took ten readings at each location using each hammer type. We performed the tests in general accordance with ASTM D5873-14, except that we did not use a grinding stone to smooth in situ rock surfaces. Testing was performed where the rock appeared most intact rather than being conducted on a grid pattern. The accompanying report provides additional detail.
    Date: 2023 (process 3 of 3)
    Unconfined compressive strength testing - We collected rock samples representing major rock types in the region for UCS testing. We collected at least five samples of each rock type that could potentially yield cores longer than 10.2 cm (4.0 in); because of weight and space constraints in transporting samples to Fairbanks, we only collected samples from four selected locations. We submitted samples to the Frozen Soil Testing Laboratory at UAF for preparation and testing. Testing was performed in accordance with ASTM D7012-14e1, "Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures, Method C" (ASTM International, 2014b). To obtain the 2:1 length-to-diameter ratio required by this method, a 5.08 cm (2 in) diameter coring bit was used to obtain cores that were then trimmed to a length of 10.16 cm (4 in). Depending on the dimensions and competency of the collected rock samples, up to four cores were obtained from each rock and subjected to UCS testing.
  3. What similar or related data should the user be aware of?
    Truskowski, C.M., Walser, S.L., Larsen, M.C., Nicolazzo, J.A., Gillis, R.J., Bull, K.F., Regan, S.P., Darrow, M.M., and Montayne, Simone, 2024, Field station locations and data for the geologic map of the Haines-Takshanuk Mountains-Chilkat Peninsula area STATEMAP project, southeast Alaska, collected in 2022 and 2023: Raw Data File RDF 2024-17, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 3 p
    Truskowski, C.M., Gillis, R.J., Bull, K.F., and Regan, S.P., 2024, Major oxide and trace element analyses for rock samples from the Haines-Takshanuk Mountains-Chilkat Peninsula area STATEMAP project, southeast Alaska: Raw Data File RDF 2024-18, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Zechmann, J.M., Daanen, R.P., Wikstrom Jones, K.M., and Wolken, G.J., 2024, Lidar-derived elevation data for Haines, Southeast Alaska, collected October 2021 and October 2022: Raw Data File RDF 2023-18, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 16 p
    Daanen, R.P., Herbst, A.M., Wikstrom Jones, K.M., and Wolken, G.J., 2021, High-resolution lidar data for Haines, southcentral Alaska, December 8-12, 2020: Raw Data File RDF 2021-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 8 p
    Wolken, G.J., Wikstrom Jones, K.M., Whorton, E.N., Gould, A.I., and Hendricks, M.D., 2017, Photogrammetric data of the Haines Highway corridor: May 26, 2014: Raw Data File RDF 2017-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 20 p

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

  1. How well have the observations been checked?
    The accompanying report provides a comprehensive discussion of processing methods. When applicable, errors are reported in the data tables. These data are being released in the DGGS Raw Data File series. Reports in this series present field data and analytical results with limited or no interpretation by DGGS staff or project collaborators. Analytical results may include interpretations by laboratories when an interpretive review of the analytical findings is necessary to develop usable output. The reports and accompanying data have been evaluated by project staff for general readability and logical consistency but have not undergone technical peer review.
  2. How accurate are the geographic locations?
    We recorded location information using GPS-enabled tablets running Esri ArcGIS Field Maps app, with a reported horizontal error of approximately 5 to 10 meters. Latitude and longitude are reported in the WGS84 coordinate system.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    This data release is complete.
  5. How consistent are the relationships among the observations, including topology?
    Not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  1. Who distributes the data set? (Distributor 1 of 1)
    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov
    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set? RDF 2024-28
  3. What legal disclaimers am I supposed to read?
    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 04-Nov-2024
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov
Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.50 on Mon Nov 04 20:06:22 2024