Preliminary description and interpretation of the Doone Creek fault and associated structures: The potential offset and northeastward continuation of the Bruin Bay fault system in the south-central Talkeetna Mountains, Alaska

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Frequently anticipated questions:


What does this data set describe?

Title:
Preliminary description and interpretation of the Doone Creek fault and associated structures: The potential offset and northeastward continuation of the Bruin Bay fault system in the south-central Talkeetna Mountains, Alaska
Abstract:
Preliminary description and interpretation of the Doone Creek fault and associated structures: The potential offset and northeastward continuation of the Bruin Bay fault system in the south-central Talkeetna Mountains, Alaska, Preliminary Interpretive Report 2024-1, provides station location data and fault and bedding plane dip angle measurements collected during reconnaissance field mapping in the southern Talkeetna Mountains. This publication discusses structural observations and presents a preliminary 1:25,000 scale geologic map of the Doone Creek area, southcentral Talkeetna Mountains. The map area encompasses the junction between the Castle Mountain and Caribou faults that cut obliquely across the Jurassic Talkeetna arc. The area also contains the newly identified Doone Creek fault and an intra-formational brittle fault zone that deform Talkeetna arc lithologies subparallel to the arc boundary. The Doone Creek fault and other north and northeast-trending faults and folds represent an unstudied family of structures that may be correlative to similar features that bound the southeastern margin of the Talkeetna arc in the Cook Inlet area to the southwest. These data and report are available from the DGGS website: http://doi.org/10.14509/31108.
Supplemental_Information:
doone_creek_fault_data:    Station location and fault and bedding plane dip measurements.
  1. How might this data set be cited?
    Gillis, R.J., Trop, J.M., and Kuyl, Leo, 2024, Preliminary description and interpretation of the Doone Creek fault and associated structures: The potential offset and northeastward continuation of the Bruin Bay fault system in the south-central Talkeetna Mountains, Alaska: Preliminary Interpretive Report PIR 2024-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 18 p.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -148.749800
    East_Bounding_Coordinate: -147.995800
    North_Bounding_Coordinate: 61.883332
    South_Bounding_Coordinate: 61.729520
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2023
    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?
    pir2024_001_doone_creek_fault_data.csv, pir2024_001_doone_creek_fault_data_dictionary.csv
    Station location and fault and bedding plane dip measurements. (Source: DGGS)

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?
    We thank Eric and Corrie Feige for generously allowing us access to their property for helicopter deployment to the field location. Soloy Helicopters deployed and demobilized our camp near Castle Mountain. This project was funded by State of Alaska In-State Gas Phase 2 and 3 Capital Improvement Projects and Geological Society of America Northeastern Section student grant (to Leo Kuyl). A technical review by Travis Naibert improved the clarity of the paper.
  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?

This publication provides observations and discussion of the nature and significance of faults that deform the Jurassic arc-forearc margin in the Talkeetna Mountains.

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 1)
    Geologic mapping - Staff from the DGGS and Bucknell University spent four days in June of 2022 conducting reconnaissance field mapping in the southern Talkeetna Mountains while collecting structural and stratigraphic information.
  3. What similar or related data should the user be aware of?
    Gillis, R.J., Trop, J.M., and Kuyl, Leo, 2023, The Doone Creek fault: A newly identified structure in the Talkeetna Mountains, Alaska, that belongs to a system of north- and northeast-trending faults that may delineate the Paleogene forearc basin boundary (poster): Alaska Geological Society Technical Conference, Anchorage, Alaska, April 22, 2023: Poster and Presentation Gillis, R.J. and others, 2023, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet

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

  1. How well have the observations been checked?
    The bedding and fault plane dip measurements were collected using a Brunton compass. Rock surface irregularities could introduce a few degrees of uncertainty in the accuracy of the measurements but would not significantly impact the overall data measurement trends.
  2. How accurate are the geographic locations?
    Location data were collected using handheld recreational grade Garmin GPS units. These devices have a typical reported accuracy of +/- 10 meters.
  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? PIR 2024-1
  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: 26-Aug-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 Aug 26 18:18:20 2024