Carver, G. A., Bemis, S. P., Solie, D. N., Castonguay, S. R., and Obermiller, K. E., 2010, Active and potentially active faults in or near the Alaska Highway corridor, Dot Lake to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2010-1, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.Online Links:
This is a Point data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.0005
Ordinates (y-coordinates) are specified to the nearest 0.0005
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.978698.
free text - names of geologic features
free text - name of the trench
| Value | Definition |
|---|---|
| 6V | the UTM zone in which the sample was collected |
| 7V | the UTM zone in which the sample was collected |
| Range of values | |
|---|---|
| Minimum: | 379831 |
| Maximum: | 647503 |
| Units: | meters |
| Range of values | |
|---|---|
| Minimum: | 6999311 |
| Maximum: | 7064849 |
| Units: | meters |
free text - unique sample number given to each radiocarbon sample analyzed.
free text - description of location of each sample based on trench log
Type of carbon analyzed (i.e., detrital charcoal, peaty material, wood, charcoal).
paleoseismic event or timing constrained by age date.
Unique sample identifying numbers, preceded by "B" (e.g., B252298)
| Range of values | |
|---|---|
| Minimum: | 70 |
| Maximum: | 10690 |
| Units: | years |
| Range of values | |
|---|---|
| Minimum: | -28.2 |
| Maximum: | -22.8 |
| Units: | 0/00 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 12,840 |
| Units: | years |
This research was supported by 2009, and 2010 Alaska State Capital Improvement Projects funding.Additional Acknowledgments: Peter Haeussler (USGS) and Gordon Seitz (San Diego State University) for reviews of the Dot "T" Johnson trench III and 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. We also appreciate suggestions and insight provided by the ADGGS bedrock-mapping group, Joe Andrews, Larry Freeman and Melanie Werdon. The report was reviewed by Richard Koehler.
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This report is a part of ADGGS's Alaska 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.
Bemis, S. P., and Wallace, W. K., 2007, Neotectonic framework of the north-central Alaska Range foothills: Geological Society of America Special Paper 431 Special Paper 431.
Ridgeway, K. D., Trop, J. M., Glen, M. G., and O'Neill, J. M., 2007, Tectonic growth of a collisional continental margin: Geological Society of America Special Paper Special Paper 431.
Bemis, S. P., 2004, Neotectonic framework of the north-central Alaska Range foothills: University of Alaska Fairbanks, Fairbanks AK.
Bemis, S. P., Weldon, R. J., and Burns, P. A. C., 2005, Progress in characterizing active faults of the northern flank of the Alaska Range: Geological Society of America Abstracts with Programs v. 37, no. 7, p.78.
Burns, L. E., Surveys, Fugro Airborne , and 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: Geophysical Report GR 2006-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.
Carver, G. A., Plafker, George, Metz, M.C., Cluff, Lloyd, Slemmons, Burt, Johnson, Elden, Roddick, Jim, and 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: Bulletin of the Seismological Society of America vol 94, no. 6B.
Rowe, C. A., Christensen, Douglas, and Carver, G. A., 2004, The 2002 Denali fault earthquake sequence: Bulletin of the Seismoloigcal Society of America Dedicated Issue.
Carver, G. A., Plafker, George, Metz, M.C., Cluff, Lloyd, Bemis, S.P., Jim, Roddick., Redington, J., and 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: American Geophysical Union, Alaska.
Matmon, Ari, Schwartz, D. P., Haeussler, P. J., Finkel, R., Lienkaemper, J. J., Stenner, H. D., and Dawson, T. E., 2006, Denali fault slip rates and Holocene-late Pleistocene kinematics of central Alaska: Geology v.34, no.8.
Page, R. A., Plafker, George, and Pulpan, Hans, 1995, Block rotation in east-central Alaska: a framework for evaluating earthquake potential?: Geology v.23, no.7.
Plafker, George, Gilpin, L. M., and Lahr, J. C., 1994, Neotectonic map of Alaska:.
Plafker, George, and Berg, H. C., 1994, The geology of Alaska: DNAG v.G-1, Geological Society of America, Boulder CO.
Reger, R. D., Stevens, D. S. P., and Solie, D. N., 2008, Surficial-geologic map of the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3A, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.
Carver, G. A., P., Bemis S. , Solie, D. N., and Obermiller, K. E., 2008, Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Investigative Report PIR 2008-3D, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.
Reger, R. D., Hubbard, T. D., and Carver, G. A., Unpublished material, Surficial geology of the Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Investigative Report PIR 2009-6A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.
Hubbard, T. D., and Reger, R. D., 2010, Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2009-6B, Alaska Department of Geological & Geophysical Surveys, Fairbanks, AK.
Data sources used in this process:
Reger, R. D., Stevens, D. S. P., and Solie, D. N., 2008, Surficial-geologic map, Alaska Highway Corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3A, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.
Reger, R. D., and Solie, D. N., 2008, Engineering-geologic map, Alaska Highway Corridor, Delta Junction to Dot Lake, Alaska: Preliminary Interpretive Report PIR 2008-3B, Alaska Division of Geological & Geophysical Surveys, Fairbanks AK.
Carver, G. A., Bemis, S. P., Solie, D. N., and Obermiller, K. E., 2008, Active and potentially active faults in or near the Alaska Highway corridor, Delta Junction to Dot Lake, Alaska: Preliminary Investigative Report PIR 2008-3D, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.
Reger, R. D., Hubbard, T. D., and Carver, G. A., Unpublished material, Surficial geology of the Alaska Highway corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Investigative Report PIR 2009-6A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, AK.
Hubbard, T. D., and Reger, R. D., 2010, Engineering-geologic map of the Alaska Highway Corridor, Robertson River to Tetlin Junction, Alaska: Preliminary Interpretive Report PIR 2009-6B, Alaska Department of Geological & Geophysical Surveys, Fairbanks, AK.
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.
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 Appendix 1 are referred to their respective trenches and core sites whose locations are listed in Table 1. The spreadsheet distribution file is a compilation of Table 1 and Appendix 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.
All of the samples collected for dating were submitted for analysis and presented in this report.
not applicable
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Preliminary Interpretive Report PIR 2010-1
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| Data format: | PDF (version 1.6) |
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| Network links: |
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| Data format: | CSV (version None) |
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