Carver, G.A
Bemis, S.P.
Solie, D.N.
Obermiller, K.E.
200811
Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska
tabular digital data
Preliminary Interpretive Report
PIR 2008-3D
Fairbanks, Alaska - USA
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
32 p.
http://www.dggs.alaska.gov/pubs/pubs
During the 2006 and 2007 field seasons, geologic features indicative of possible youthful surface faulting in or near the Alaska Highway corridor between Delta Junction and Dot Lake were identified by helicopter and fixed-wing air reconnaissance, augmented by interpretation of stereo air photos, remotely sensed images, and aeromagnetic and electromagnetic (EM) datanction to the eastern boundary of the Mt. Hayes Quadrangle. The largest of these faults is the previously unrecognized Dot "T" Johnson fault, a major west-trending, south-dipping thrust fault bordering the northern margin of the Alaska Range along the south side of the Tanana River valley. Two other faults identified as active in this study, the Canteen and Granite Mountain-Panoramic faults, are northeast-trending, left-lateral, strike-slip faults that connect segments of the Dot "T" Johnson thrust system, where they are separated by large left steps. The Billy Creek fault is a northeast-trending, left-lateral, strike-slip fault in the Yukon-Tanana Upland north of the Tanana River valley.
This report is a part of ADGGS'sAlaska Natural Gas Pipeline Geology and Geohazards project. The study was done in anticipation of the proposed natural gas pipeline along the Alaska Highway corridor. Recognition of potentially active faults is an important factor in design engineering of infrastructure.
Attribute information for the following tables (entities) is included in this metadata file under the "Entity_and_Attribution_Information" section. Layers include:
> Table1_Coordinates geographic coordinates for trenches, core site, and profiles
> Appendix1_14C_Ages analytical results for radiocarbon samples
2006
2007
ground condition
Unknown
-145.50000
-143.90000
64.00000
63.50000
None
Alaska Pipeline
C14
Geologic Hazards
Faults
Faulting
Strike-Slip
Structural Geology
Structure
Thrust
Transportation Corridor
None
Alaska Highway Corridor
Big Delta
Big Delta Quadrangle
Delta Junction
Delta River
Mount Hayes Quadrangle
Tanana River
Dot Lake
None
White River Ash
Nenana Gravel
Yukon-Tanana Upland
Denali Fault
None
Holocene
Quaternary
Pleistocene
This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
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. 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.
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
GIS Data Manager/Cartographer
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
(907) 451-5029
(907) 451-5020
(907) 451-5050
dggspubs@alaska.gov
You may view our web site at http://www.dggs.alaska.gov for the latest information on available data.Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change.
This research was supported by 2005 and 2006 Alaska State Capital Improvement Projects funding.Additional Acknowledgments: Ray J. Weldon (University of Oregon) for reviews of the Billy Creek, Canteen, and Dot "T" Johnson I and II trenches; Peter Haeussler (USGS) and Gordon Seitz (San Diego State University) for reviews of the Sears Creek trench. Valuable discussions with Richard D. Reger (Reger Geologic Consulting), Robert F. Swenson (ADGGS Director and State Geologist), and Rodney A. Combellick (ADGGS Deputy Director) are also acknowledged. The report was reviewed by Richard D. Reger.
Adobe Acrobat Reader, and any text editor.
Reger, R.D.
Stevens, D.S.P.
Solie, D.N.
2008
Surficial-geologic map, Alaska Highway Corridor, Delta Junction to Dot Lake, Alaska
map
Preliminary Interpretive Report
PIR 2008-3a
Fairbanks AK
Alaska Division of Geological & Geophysical Surveys
2 sheets, scale 1:63,360
Reger, R.D.
Solie, D.N.
2008
Engineering-geologic map, Alaska Highway Corriodor, Delta Junction to Dot Lake, Alaska
tabular digital data
Preliminary Interpretive Report
PIR 2008-3b
Fairbanks AK
Alaska Division of Geological & Geophysical Surveys
2 sheets, scale 1:63,360
Locations of trenches, core sites and profiles are given for the approximate mid-point of each feature. The radiocarbon samples were carefully extracted from trench walls and cores to minimize contamination. Samples were stored in the field in aluminum foil packets which were placed in labeled plastic bags after air-drying, and the dry samples transferred to labeled glass vials once they were out of the field. Before being sent to the laboratory for analyses, each sample was inspected through a binocular microscope, picked clean of mineral debris, and for some samples, individual plant macrofossils or charcoal grains were separated for analysis. Beta Analytic Radiocarbon Dating Laboratory in Miami Florida performed the radiocarbon age analyses on the 14C samples. Samples were pretreated using the acid/alkali/acid standard pretreatment protocol. All analysis was done using AMS methods and included 13C corrections. Quoted errors for laboratory ages represent 1 standard deviation statistics (68% probability) and are based on combined measurements of the sample, background, and modern reference standards. Measured 13C/12C ratios were calculated relative to the PDB-1 international standard and the radiocarbon years before present ("Lab Age") were normalized to -25 per mil.
Laboratory ages were then calibrated using the OxCal v4.0 calibration program and the IntCal 04 calibration curve. All calibrated ages are reported as calibrated 2 sigma ranges before present (cal BP). The data in Appendix 1 report the method used, material type, paleoseismic significance, sample and lab numbers, lab age, 13C/12C ratios, and two-sigma calendar calibration result for each of the 20 radiocarbon samples. References for the calibration methods, as reported by Beta Analytic Inc. are:
Stuiver, M., and van der Plicht, H., Radiocarbon, 1998, vol. 40, no. 3, p. xii-xiii.
Stuiver, M. and others, Radiocarbon, 1998, vol. 40, no. 3, p. 1041-1083.
Talma, A.S. and Vogel, J.C., Radiocarbon, 1993, vol. 35, no. 2, p. 317-322.
not applicable
This dataset includes 18 of the 23 carbon samples that were submitted from this project to Beta Analytic Inc. after the 2007 field season. Of the 23 submitted, three did not have sufficient carbon material to date and the analyses were cancelled. The two unreported samples, from the Billy Creek Trench, yielded results with modern 14C signatures. These samples, both from within a half meter from the surface, are interpreted as being the result of recent localized animal activity and thus not representative.
Locations of points recorded in the table were recorded using a Garmin GPS model 76CSx with a horizontal error of 4 meters or less. The locations are for approximate mid-point of each trench. Individual radiocarbon age samples in Apppendix 1 are referred to their respective trenches and core sites whose locations are listed in Table 1. The actual location of each radiocarbon sample within the trench or core is shown in the trench logs and core logs in the figures of this report. Locations shown on the logs were determined using a metric tape, measuring distances from defined origins, to half-centimeter accuracy.
Bemis, S.P.
Wallace, W.K.
2007
Neotectonic framework of the north-central Alaska Range foothills
book chapter
Geological Society of America Special Paper 431
SP 431
p. 549-572
Ridgeway, K.D.
Trop, J.M.
Glen, M.G.
O'Neill, J.M.
2007
Tectonic growth of a collisional continental margin
document
Geological Society of America Special Paper
Speical Paper 431
editors
paper
2007
publication date
Bemis and Wallace, 2007
tectonic framework
Bemis, S.P.
2004
Neotectonic framework of the north-central Alaska Range foothills
document
Fairbanks, AK
University of Alaska Fairbanks
Masters Theses, 142 pages
paper
2004
publication date
Bemis thesis, 2004
tectonic framework
Bemis, S.P.
Weldon, R.J.
Burns, P.A.C.
2005
Progress in characterizing active faults of the northern flank of the Alaska Range
conference proceedings
Geological Society of America Abstracts with Programs
v. 37, no. 7, p.78
Geological Society of America Abstracts with Programs, vol.37, no. 7, p. 78, Annual Meeting, October 16, 2005
paper
2005
publication date
Bemis, Weldon & Burns, 2005
Canteen fault abstract
Burns, L.E.
Fugro Airborne Surveys
Stevens Exploration Management Corp.
2006
Line, grid and vector data, and plot files for the airborne geophysical survey of the Alaska Highway corridor, east-central Alaska
vector digital data
Geophysical Report
GR 2006-6
Fairbanks AK
Alaska Division of Geological & Geophysical Surveys
DVD
2006
ground condition
Burns, 2006
airborne geophysical data
Carver, G.A.
Plafker, George
Metz, Mike
Cluff, Lloyd
Slemmons, Burt
Johnson, Elden
Roddick, Jim
Sorensen, Steve
2004
Surface rupture on the Denali fault interpreted from tree damage during the 1912 Delta River MW7.2-7.4 earthquake: Implications for the 2002 Denali fault earthquake slip distribution
journal article
Bulletin of the Seismological Society of America
vol 94, no. 6B
p. S58-S71
Rowe, C.A.
Christensen, Doug
Carver, G.A.
2004
The 2002 Denali fault earthquake sequence
document
Bulletin of the Seismoloigcal Society of America
Dedicated Issue
v.94, no.6B
paper
2002
ground condition
Carver and others, 2004
Denali fault surface rupture
Carver, G.A.
Plafker, George
Metz, Mike
Cluff, Lloyd
Bemis, Sean
Roddick, Jim
Redington, Julie
Sorensen, Steve
2006
Late Quaternary growth of thrust faults and associated folds in the eastern part of the Northern Foothills Fold and Thrust Belt, central Alaska Range, Alaska
conference proceedings
Alaska
American Geophysical Union
Chapman Conference on Active Tectonics and Seismic Potential of Alaska, May 11-14, 2006
paper
2006
publication date
Carver and others, 2006
eastern Northern Foothills fold and thrust belt
Matmon, Ari
Schwartz, D.P.
Haeussler, P.J.
Finkel, Robert
Lienkaemper, J.J.
Stenner, H.D.
Dawson, T.E.
2006
Denali fault slip rates and Holocene-late Pleistocene kinematics of central Alaska
journal article
Geology
v.34, no.8
p.645-648
paper
2006
publication date
Matmon and others, 2006
Denali slip rates, central Alaska kinematics
Page, R.A.
Plafker, George
Pulpan, Hans
1995
Block rotation in east-central Alaska: a framework for evaluating earthquake potential?
journal article
Geology
v.23, no.7
p.629-632
paper
1995
publication date
Page and others, 1995
block rotation in east-central Alaska
Plafker, George
Gilpin, L.M.
Lahr, J.C.
1994
Neotectonic map of Alaska
book chapter
scale 1:2,500,000
Plafker, George
Berg, H.C.
1994
The geology of Alaska
document
DNAG
v.G-1
Boulder, CO
Geological Society of America
editors
12 plates
paper
1994
publication date
Plafker and others, 1994
Neotectonic map of Alaska
Reger, R.D.
Stevens, D.S.P.
Solie, D.N.
2008
Surficial-geologic map of the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska
map
Preliminary Interpretive Report
PIR 2008-3a
Fairbanks, AK
Alaska Division of Geological & Geophysical Surveys
2 sheets, scale 1:63,360
digital database file
2008
publication date
Reger and others, 2008
surficial geology map
Initial reconnaissance - an initial interpretation of stereo air photos, remote sensed images, DEM's, and topographic maps of the corridor and surrounding regions was done prior to fieldwork. We also conducted a review of published and unpublished reports and geologic and geophysical survey maps to identify and locate lineaments and potentially active faults for further study. This initial phase was followed by fixed wing and helicopter reconnaissance of the corridor and adjacent regions with emphasis on potential faults and lineaments identified from the review of literature, air photos, remote sensed images, and maps. Based on the initial studies and the air reconnaissance, we identified lineaments and potentially active faults judged to warrant further studied in the field and selected sites for detailed investigation.
Bemis and Wallace, 2007
Bemis thesis, 2004
Bemis, Weldon & Burns, 2005
Burns, 2006
Carver and others, 2004
Carver and others, 2006
Matmon and others, 2006
Page and others, 1995
Plafker and others, 1994
Reger and others, 2008
2007
Fieldwork - In July-August 2007, to further study specific sites identified in preliminary reconnaissance. The detailed investigations included geologic and geomorphic mapping, scarp profiling, measurement of scarp height and fault offset, and at selected sites, trenching and coring to develop paleoseismic information for active fault characterization
2007
Trenching - Trench sites were chosen to transect features suspected to be active faults, in order to expose a cross sectional view of faults and the most recent stratigraphy. At sites that were inaccessible to motorized excavation equipment we hand-dug the trenches. To facilitate field interpretation and logging we used nails to pin colored flagging along exposed contacts and faults on the cleaned trench walls. Logging of the trench walls was done by placing a grid of horizontal and vertical string lines over the exposed trench wall, and used this grid to accurately measure and transfer each feature to cross section Mylar. Each stratigraphic layer and feature of interest was described and locations of radiocarbon samples were recorded. Soil and sediment colors for each stratigraphic unit were defined using a Munsell Soil Color chart. Where possible, we collected radiocarbon samples from layers bounding faulting events to bracket the age of paleo-earthquakes interpreted from the stratigraphy. Upon completion, we backfilled the trenches, re-contoured the trench sites and replaced the natural vegetation.
2007
Labwork - The radiocarbon samples were carefully extracted to minimize contamination. Samples were stored in the field in aluminum foil bindles which were placed in labeled plastic bags after air-drying, and the dry samples transferred to labeled glass vials once they were out of the field. Before being sent to the laboratory for analyses, each sample was inspected through a binocular microscope, picked clean of mineral debris, and for some samples, individual plant macrofossils or charcoal grains were separated for analysis. Beta Analytic Radiocarbon Dating Laboratory in Miami Florida performed the radiocarbon age analyses on the 14C samples.
2007
Metadata creation - Metadata were assembled by D.N. Solie to FGDC Standards using Metavist 1.2, DGGS 7.05, a data entry program for FGDC metadata with XML output.
2008
Universal Transverse Mercator
6
0.9996
-147.00000
0
500000.0
0
coordinate pair
0.0005
0.0005
meters
UTM
North American Datum of 1927
Clarke 1866
6378206.4
294.978698
Table1_coordinates
Table1_coordinates.csv
Geographic coordinates for trenches, core site and profiles
Alaska Division of Geological & Geophysical Surveys
Name
Name of the trench, core site or profile
Alaska Division of Geological & Geophysical Surveys
Name of the trench, core site or profile
Latitude
Latitude of trench, core site or profile, NAD 27 Alaska datum.
Alaska Division of Geological & Geophysical Surveys
63.6067
63.8421
degrees
Longitude
Longitude of trench, core site or profile, NAD 27 Alaska datum
Alaska Division of Geological & Geophysical Surveys
-145.4560
-143.9254
degrees
UTM E NAD 27
Easting in UTM zone 6 or 7, NAD 27, Clark 1866
Alaska Division of Geological & Geophysical Surveys
351570
638523
meters
UTM N NAD 27
Northing in UTM, zone 6 or 7, NAD 27, Clark 1866
Alaska Division of Geological & Geophysical Surveys
7057887
7080146
meters
UTM Zone
UTM zone in which trench, core site or profile is located
Alaska Division of Geological & Geophysical Surveys
6
7
zone
USGS quadrangle
1:63,360 USGS quadrangle in which trench, core site or profile is located
Alaska Division of Geological & Geophysical Surveys
1:63,360 USGS quadrangle in the Mount Hayes or Tanacross quadrangles.
Appendix1_14C_ages
Appendix1_14C_ages.csv
Analytical results for radiocarbon samples
Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc.
Site
Name of the trench, core site or profile
Alaska Division of Geological & Geophysical Surveys
Name of the trench, core site or profile
Sample Number
Sample number which is unique identifier for each radiocarbon sample, based on an abbreviation for trench followed by a consecutive number of sample collected from trench and depth in cm from surface.
Alaska Division of Geological & Geophysical Surveys
Unique sample number given to each radiocarbon sample analyzed.
Location
Location of sample within trench wall, as shown on gridded trench log, or in core.
Alaska Division of Geological & Geophysical Surveys
Description of location of each sample based on trench log.
Sample Material
Type of carbon material dated
Alaska Division of Geological & Geophysical Surveys
Type of carbon analyzed (ie, detrital charcoal, peaty material, wood, charcoal).
Paleoseismic Significance
Purpose for obtaining the age date; what constraints on timing the age imparts
Alaska Division of Geological & Geophysical Surveys
Paleoseismic event or timing constrained by age date.
Lab Number
Unique identifying sample number assigned by the laboratory at Beta Analytic Inc.
Beta Analytic Inc.
Unique sample identifying numbers, preceded by "Beta" (eg, Beta-235569)
Lab_Age_BP
Radiocarbon years before present, ("present" being 1950). Quoted errors represent 1 standard deviation statistics.
Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc.
10
8690
years
13C/12C
Measured ratio of 13C to 12C, calculated relative to the PCB-1 international standard.
Alaska Division of Geological & Geophysical Surveys and Beta Analytic Inc.
-28.2
-23.5
0/00
Cal BP
Radiocarbon age calibrated to calendar years using the OxCal v4.0 calibration program and teh IntCal 04 calibration curve. Ages reported as calibrated 2 sigma ranges before present.
Alaska Division of Geological & Geophysical Surveys and Beta Analytic In.
0
12,870
years
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Natural Resource Technician
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
907-451-5020
None available.
907-451-5050
dggspubs@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
Please view our Web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
Preliminary Interpretive Report PIR 2008-3D
The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product.
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CSV
2008
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20080930
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Metadata Manager
mailing and physical address
3354 College Road
Fairbanks
AK
99709-3707
USA
907-451-5039
907-451-5050
dggspubs@alaska.gov
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Please contact us through the e-mail address above whenever possible.
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If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.