Layer, P.W.
Benowitz, J.A.
Freeman, L.K.
2011
40AR/39AR Ages from the East Bonnifield geologic map area, Fairbanks A-1, Fairbanks A-2, Healy D-1, and Healy D-2 quadrangles, Alaska
tabular digital data
Raw Data File
RDF 2011-2
Fairbanks, Alaska - USA
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
22 p.
http://dx.doi.org/10.14509/22482
40Ar/39Ar data from plutonic, dike, and alteration samples collected during geologic mapping of the eastern part of the Bonnifield mining district geologic map area in parts of Fairbanks A-1 and Fairbanks A-2 and Healy D-1 and Healy D-2 quadrangles yield results indicating the plutons, dikes, and a gold-bearing quartz vein in the Bonnifield Map area range from 85 to 95 m.y.
In 2008, the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted a geologic mapping project in parts of the Fairbanks A-1, Fairbanks A-2, Healy D-1, and Healy D-6quadrangles. Our purpose was to map the bedrock geology at a scale of 1:50,000 as part of the Alaska Geophysical/Geological Mineral Inventory (AGGMI) program investigations in the Bonnifield mining district. DGGS published geochemical data resulting from the 2008 work in 2009 (Freeman and others, 2009a). A brief discussion of the results was given in Freeman and others (2009b) and Freeman and others (2010). The purpose of this DGGS Raw Data File is to present the 40Ar/39Ar results and make them available for use to the public that are interested in the area.
Attribute information for the three tables (entities) is included in this metadata file under the "Entity_and_Attribution_Information" section. The tables are hierarchical with the SampleLocationDescription table being the parent of of the SummaryAges table which is in turn the parent of StepHeatingData table. The the tables are connected by the SampleNumber and DatedMaterial columns. All tables comprise a single layer as follows:
>ArgonGeochronologicData: SampleLocationDescription, SummaryAges, and StepHeatingData
062008
072008
ground condition
None planned
-147.8028
-147.1864
64.0634
62.9455
ISO 19115 Topic Category
geoscientificInformation
None
Geology
40Ar/39Ar
Age Dates
Geochronology
STATEMAP Project
None
Alaska, State of
Alaska Range
Fairbanks Quadrangle
Healy Quadrangle
Denali Borough
Wood River
West Fork Little Delta River
Dry Creek
Kansas Creek
Chute Creek
Rogers Creek
Sheep Creek
Glacier Creek
Threemile Creek
Snow Mountain Gulch
Slide Creek
Glory Creek
Red Mountain Creek
Newman Creek
Forgotten Creek
Slate Creek
WTF (Western Tundra Flats) prospect
Red Mountain Creek prospect
Dry Creek prospect
LEA Creek prospect
Buzby prospect
Smog prospect
Glory Creek prospect
Kansas Creek prospect
Dry Creek placer mine
Newman Creek placer mine
None
Cretaceous
Late Cretaceous
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).
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.
Alaska Division of Geological & Geophysical Surveys
GIS Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
dggsgis@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
This project is part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Partial funding for the geologic mapping and 39Ar/40Ar geochronology was also provided through the State of Alaska General Fund and the U.S. Geological Survey STATEMAP Program under award number 08HQAG0051. Samples were collected as part of the geologic mapping program during 2008 by J.E. Andrew, M.B. Werdon, D.J. Szumigala, and L.K Freeman of DGGS and by R.J. Newberry of the Department of Geology & Geophysics, University of Alaska Fairbanks
Microsoft Windows XP SP2, Microsoft Excel 2003
Coordinates of sample locations were determined by the geologists in the field using Garmin 12XL GPS receivers with no differential correction. The coordinates were recorded in field notes along with hand sample descriptions and other locality information. The coordinates were up-loaded into an MS Access database and were checked against recorded coordinates in geologists field notes. DGGS submitted eight rock samples to the UAF Geochronology Laboratory for 40Ar/39Ar dating. Separates for 40Ar/39Ar dating were prepared to >99.5% purity (visual inspection) using standard heavy liquid and magnetic separation techniques followed by hand-picking under a binocular microscope.Thin section examination of the samples prior to crushing indicated that the chosen minerals were free from alteration and sufficiently coarse-grained for mechanical separation.For all minerals, grains in the size range of 250 - 500 microns were used.For each sample, ~50-80 mg of biotite or 250-350 mg of hornblende or whole rock (phenocryst-free groundmass) was packaged in an aluminium foil tube and irradiated in position 5C at the McMaster University nuclear reactor, in Hamilton, Ontario.Approximately 20 samples were irradiated at a time.Six packages containing ~20 mg of the standard mineral mmhb-1 (Samson and Alexander, 1987) with an age of 513.9 Ma (Lanphere and others, 1990) were also irradiated with the samples to determine the irradiation parameter (J) and the flux gradient in the reactor.Samples and standards were analyzed 45 to 90 days after irradiation. The irradiated samples were step-heated on-line in a Modifications Ltd. low-blank furnace.Temperature control was better than 5 degrees and a maximum temperature in excess of 1600o C was achievable to ensure complete sample fusion.The extracted argon was purified in a two-stage process using a liquid nitrogen cold finger and two SAES Zr-Al getters.Prior to measurement of the Ar, the gas was collected on an activated charcoal finger.The purified Ar gas was measured using a Nuclide 6-60-SGA 15 cm mass spectrometer.The sensitivity of the spectrometer is 6.5 x 10-15 mol/mV and system noise is generally around 0.02 mV.System blanks are generally better than 1 X 10-14 mol for 40Ar.Argon isotopic measurements for both samples and standards were corrected for the system blanks, for decay of37Ar and 39Ar, and for reactor-induced isotopic interferences.Ages were calculated using the equations and corrections from McDougall and Harrison (1999) and the constants from Steiger and Jaeger (1977) and are shown in Table 2 (age summary) and Table 3 (analytical data).All errors on analyses are reported at the 1-sigma level. For each mass spectrometer analysis, five Ar isotope abundances are measured.36Ar is used to determine the amount of atmospheric or initial Ar in the sample, 37Ar provides an estimation of the Ca content in the mineral, 38Ar provides an estimation of the Cl content, 39Ar reflects the K content and 40Ar is a mixture of initial and radiogenic Ar.The age of the sample is proportional to the ratio of the amount of radiogenic 40Ar to the amount of 39Ar produced by neutron bombardment from 40K.
No topologic relationships are present in the data. Sample numbers in the each of the three tables were recorded by geologists in the field, recorded on sample bags and on field note sheets. The sample numbers were transcribed into an Access database by a field assistant. Table 1 was generated from the database and was cross checked against the sample numbers recorded on the bags for consistency. Sample numbers in tables 2 and 3 were generated by the UAF geochronology lab from the a list provided by DGGS and cross checked with sample numbers on the bags. We are certain that the sample numbers in the table are logically correct.
This dataset includes all of the samples submitted for 40Ar/39Ar age date analyses from the Healy and Fairbanks quadrangle that were collected by DGGS during the summer of 2008.
All field locations were determined by the geologists in the field using Garmin 12XL GPS receivers with no differential correction. Estimated position errors as calculated by the Garmin 12XL receivers were recorded in the field and range from 3 to 6 meters for the samples used in this data.
Freeman, L.K.
Werdon, M.B.
Szumigala, D.A.
Andrew, J.A.
Newberry, R.J.
Athey, J.A.
2009
Geochemical, major-oxide, minor-oxide, trace-element and carbon data from rocks collected in 2008 in the eastern Bonnifield mining district, Fairbanks and Healy quadrangles, Alaska
tabular data
Alaska Division of Geological & Geophysical Surveys Raw Data File
RDF 2009-1
69 p.
paper and digital
2009
publication date
Freeman and others, 2009a
Provides chemical data for classification and description of samples
Freeman, L.K.
Newberry, R.J.
Andrew, J.A.
Werdon, M.B.
Szumigala, D.A.
Athey, J.A.
Burns, L.E.
2009
Recent geologic mapping in the eastern Bonnifield mining district, Alaska
poster presentation
Geological Society of America Abstracts with Programs
v. 41, no. 7
(abstract), P. 282
paper
2009
publication date
Freeman and others, 2009b
Describes field work and initial geologic findings, reports preliminary ages
Lanphere, M.A.
Dalrymple, G.B.
2000
First-principles calibration of 38Ar tracers: Implications for the ages of 40Ar/39Ar fluence monitors
document
U.S. Geological Survey Professional Paper
1621
10 p.
paper
2000
publication date
Lanphere and Dalrymple, 2000
Describes inter-calibration standards
Samson, S.D.
Alexander, E.C.
1987
Calibration of the inter laboratory 40Ar/39Ar dating standard, MMhb-1
journal article
Chemical Geology
v. 66
p. 27-34
paper
1987
publication date
Samson and Alexander, 1987
Inter laboratory calibration data for age determination
York, D.
Hall, C.M.
Yanase, Y.
Kenyon, W.J.
1981
40Ar/39Ar dating of terrestrial minerals with a continuous laser
journal article
Geophysical Research Letter
v. 8
p. 1136-1138
paper
1981
publication date
York, and others, 1981
Description of laser heating mass-spectrographic analysis method
Layer, P.W.
Hall, C.M.
York, D.
1987
The derivation of 40Ar/39Ar age spectra of single grains of hornblende and biotite by laser step heating
journal article
Geophysical Research Letter
v. 14
p. 757-760
paper
1987
publication date
Layer and others, 1981
Description of laser step-heating mass-spectrographic analysis method
Layer, P.W.
2000
Argon-40/argon-39 age of the El'gygytgyn impact event, Chukotka, Russia
journal article
Meteoritics and Planetary Science
v. 35
p. 591-599
paper
2000
publication date
Layer, 2000
Description of laser step-heating mass-spectrographic analysis method
McDougall, I
Harrison, T.M.
1999
Geochronology and Thermochronology by the 40Ar/39Ar method
2
book chapter
Oxford
Oxford University Press
269 pp.
paper
1999
publication date
McDougall and others, 1999
Source reference for equations and corrections used in age calculation.
Steiger, R.H.
Jager, E.
1977
Sub-commission on geochronology: convention on the use of decay constants in geo- and cosmochronology
document
Earth and Planetary Science Letters
v.36
p. 359-363
paper
1977
publication date
Steiger and Jager, 1977
discussion of use of decay constants in age determination
Fieldwork - The eastern Bonnifield map area, including parts of the Fairbanks A-1, A-2, Healy D-1, and Healy D-2 quadrangles was mapped at 1:50,000 scale. As part of the mapping geologic, samples of igneous rocks and mineralized rocks with sericite were collected as potential samples for geochronology. Sample locations were determined using Garmin 12 XL GPS receivers. Field descriptions were recorded onto field note forms which were later transcribed into a MS Access database by a geological field assistant.
Freeman and others, 2009b
200807
Sample selection - A list of samples that were collected for radiometric ages was generated from the MS Access database and checked against available samples. Petrographic thin sections for the prospective samples were examined to eliminate samples that were altered. Sample locations were plotted in GIS along with the preliminary geologic map to determine which samples would provide the most geologically significant age information.
Freeman and others, 2009b
200812
Sample description - Sample descriptions were generated from field descriptions, petrographic descriptions, and major oxide geochemistry. The sample descriptions were also used in Freeman, and others, 2009
Freeman and others, 2009a
200901
Sample preparation - Mineral separates for 40Ar/39Ar dating were prepared to greater than 99.5 percent purity (determined by visual inspection) where they were crushed, sieved, washed, and hand-picked for mineral phases or small, phenocryst-free whole-rock chips. The monitor mineral MMhb-1 (Samson and Alexander, 1987) with an age of 513.9 Ma (Lanphere and Dalrymple, 2000) was used to monitor neutron flux (and calculate the irradiation parameter, J). The samples and standards were wrapped in aluminium foil and loaded into aluminium cans 2.5 cm in diameter and 6 cm in height. The samples were irradiated in position 5c of the uranium-enriched research reactor of McMaster University in Hamilton, Ontario, Canada, for 20 megawatt-hours.
Samson and Alexander, 1987
Lanphere and Dalrymple, 2000
200903
Sample analysis - Upon their return from the reactor, the samples and monitors were loaded into 2-mm-diameter holes in a copper tray that was then loaded into an ultra-high-vacuum extraction line. The monitors were fused and samples heated using a 6-watt argon-ion laser following the technique described in York and others(1981), Layer and others (1987), and Layer (2000). Argon purification was achieved using a liquid nitrogen cold trap and an SAES Zr-Al getter at 400C. The samples were analyzed in a VG-3600 mass spectrometer at the Geophysical Institute, University of Alaska Fairbanks. The argon isotopes measured were corrected for system blank and mass discrimination, as well as calcium, potassium, and chlorine interference reactions following procedures outlined in McDougall and Harrison (1999). System blanks generally were 2x10e-16 mol 40Ar and 2x10e-18mol 36Ar, which are 10 to 50 times smaller than fraction volumes. Mass discrimination was monitored by running both calibrated air shots and a zero-age glass sample. These measurements were made on a weekly to monthly basis to check for changes in mass discrimination. A summary of all the 40Ar/39Ar results is given in table 2, with all ages quoted to the +-1 sigma level and calculated using the constants of Steiger and Jaeger (1977). The integrated age is the age given by the total gas measured and is equivalent to a potassium-argon (K-Ar) age. The spectrum provides a plateau age if three or more consecutive gas fractions represent at least 50 percent of the total gas release and are within two standard deviations of each other (Mean Square Weighted Deviation less than ~2.5). All samples were run three times to verify sample consistency.
York, and others, 1981
Layer, and others, 1987
Layer, 2000
McDougall and Harrison, 1999
Steiger and Jaeger, 1977
200905
Errata Corrections - Errors were found in the original text and data that were released in November 2009; this version provides corrected location coordinates for 2008JOE409
2016
Point
Universal Transverse Mercator
6
0.9996
-147
0
500000
0
coordinate pair
1
1
meters
ArgonGeochronologicData
North American Datum of 1927
Clarke 1866
6378137
298.25722210088
SampleLocationDescription.csv
Location and description of rock samples collected for trace-element geochemical analyses in the eastern Bonnifield mining district, Fairbanks and Circle quadrangles, Alaska
Alaska Division of Geological & Geophysical Surveys
ArgonGeochronologicData
SampleNumber
Unique sample identifier
Alaska Division of Geological & Geophysical Surveys
Generic example of unique sample identifier: 20YYAAA9999X: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X=unique alpha character designating a sample was taken at the field station. Geologists' initials represent the following: 'JOE' = Joe Andrew; 'LF' = Larry Freeman; 'MBW' = Melanie Werdon; 'RN' = Rainer Newberry; 'Z' = David Szumigala.
Latitude
Latitude in decimal degrees, NAD 27
Alaska Division of Geological & Geophysical Surveys
63.8411
64.066
decimal degrees
Longitude
Longitude in decimal degrees, NAD 27
Alaska Division of Geological & Geophysical Surveys
-147.8358
-147.3248
decimal degrees
UTME
Easting
Alaska Division of Geological & Geophysical Surveys
459098
484148
meters
UTMN
Northing
Alaska Division of Geological & Geophysical Surveys
7079208
7104209
meters
Zone
UTM Zone
Alaska Division of Geological & Geophysical Surveys
"6" indicates 06W NAD27 Alaska Projection
Description1
Brief rock description part 1 0f 3 (truncated to 255 characters)
Alaska Division of Geological & Geophysical Surveys
Brief rock description
Description2
Brief rock description part 2 of 3 (for descriptions longer than 255 characters)
Alaska Division of Geological & Geophysical Surveys
Brief rock description
Description3
Brief rock description part 2 of 3 (for descriptions longer than 510 characters)
Alaska Division of Geological & Geophysical Surveys
Brief rock description
SummaryAges.csv
Summary of 40Ar/39Ar radiometric ages of samples in this report. Preferred interpreted ages are underlined in the Adobe Acrobat portable document version of the tables.
Alaska Division of Geological & Geophysical Surveys
ArgonGeochronologicData
SampleNumber
Unique sample identifier, corresponds to "SampleNumber" attribute in "SampleLocationDescription.csv
Alaska Division of Geological & Geophysical Surveys
Generic example of unique sample identifier: 20YYAAA9999X; Where: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X=unique alpha character designating a sample was taken at the field station. Geologists' initials represent the following: 'JOE' = Joe Andrew; 'LF' = Larry Freeman; 'MBW' = Melanie Werdon; 'RN' = Rainer Newberry; 'Z' = David Szumigala.
DatedMaterial
Material used for age date
Alaska Division of Geological & Geophysical Surveys
Identifies material that was used to for the age analysis includes either mineral name for mineral seperates or "Whole Rock" for samples of fine-grained or aphanitic groundmass. Some samples were run as duplicates.
IntegratedAgeMa
Integrated age and age error in million years (Ma).
Alaska Division of Geological & Geophysical Surveys
84.3 +- 0.5
111.1 +- 1.3
Ma
PlateauAgeMa
Plateau age and age error in million years (Ma) for each sample. Preferred interpreted ages are underlined in the Adobe Acrobat portable document version of the tables. Null values indicate that the age could not be determined.
Alaska Division of Geological & Geophysical Surveys
64.2 +- 1.0
102.5 +- 1.5
Ma
PlateauInformation
Describes the number of fractions, percent 39Ar released, and Mean Standard Weighted Deviation (MSWD) used for the plateau age. Null values indicate that the age could not be determined.
Alaska Division of Geological & Geophysical Surveys
number of fractions, % 39Ar released, MSWD.
IsochronOrOtherInformation
Lists the isochron age and information of the isochron age if appropriate. Comments regarding some of the other age analyses are also listed in this column.
Alaska Division of Geological & Geophysical Surveys
If an isochron age is listed the column contains the age and age error in Ma, the initial ratio and error of 40Ar to 36 Ar (40Ar/36Ari), number (N) of fractions, and the Mean Standard Weighted Deviation (MSWD). Other values include "Loss Spectrum", "Reset, and "Reset/Loss".
StepHeatingData.csv
The Step heating data is the root 40Ar/39Ar analytical data associated with each recorded Power output level for each run of dated material from a sample in this report.
Alaska Division of Geological & Geophysical Surveys
ArgonGeochronologicData
SampleNumber
Sample number contains an identifier that along with the "DatedMaterial" column relates the Step Heating data to the "SummaryAges" entity. The "SampleNumber" attribute corresponds to the "SampleNumber' attribute inboth the "SampleLocationDescription" and "SummaryAges" entities.
Alaska Division of Geological & Geophysical Surveys
Generic example of unique sample identifier: 20YYAAA9999X; Where: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X=unique alpha character designating a sample was taken at the field station. Geologists' initials represent the following: 'JOE' = Joe Andrew; 'LF' = Larry Freeman; 'MBW' = Melanie Werdon; 'RN' = Rainer Newberry; 'Z' = David Szumigala.
DatedMaterial
Dated Material contains a string describing the material used to for the analysis along with the "SampleNumber" attribute relates the "StepHeatingData" entity to the "SummaryAges" entity. The information in this attribute and corresponds to the "Dated Material" attributes in the "SummaryAges" entity respectively.
Alaska Division of Geological & Geophysical Surveys
Identifies material that was used to for the age analysis includes either mineral name for mineral seperates or "Whole Rock" for samples of fine-grained or aphanitic groundmass. Some samples were run as duplicates.
Laser_mW
Laser output level in megawatts, or "integrated" of each heating step
University of Alaska Department of Geosciences Geochronology Laboratory
300
9000
Megawatts
Integrated
Indicates row of data from entire step heating run
Alaska Division of Geological & Geophysical Surveys and ALS Chemex.
Cum39Ar
Cumulative ratio of 39Argon released at this step. Null indicates that a cumulative value is not appropriate.
Alaska Division of Geological & Geophysical Surveys
0.0022
1.0001
Ratio40Ar39ArMeasured
Measured 40Ar/39Ar ratio for each heating step, corrected for blank and 39Ar decay
Alaska Division of Geological & Geophysical Surveys
-87.3886
887.4823
Ratio40Ar39ArMeasuredError
The one sigma error for each 40Ar/39Ar measurement.
Alaska Division of Geological & Geophysical Surveys
0.0332
122.5255
Ratio37Ar39ArMeasured
The ratio of measured 37Ar to measured 39Ar for each heating interval for each sample corrected for blank and 37Ar and 39Ar decay
Alaska Division of Geological & Geophysical Surveys
-0.4268
0.6338
Ratio37Ar39ArMeasuredError
The one sigma error for each 37Ar/39Ar measurement.
Alaska Division of Geological & Geophysical Surveys
0.0001
2.7043
Ratio36Ar39ArMeasured
Ratio of measured 36Ar to measured 39Ar for each step interval for each sample corrected for blank and 39Ar decay
Alaska Division of Geological & Geophysical Surveys
-0.0458
0.6338
Ratio36Ar39ArMeasuredError
The one sigma error for each 36Ar/39Ar measurement.
Alaska Division of Geological & Geophysical Surveys
0.0000
0.7423
PercentAtm40Ar
Percent of 40Ar which is atmospheric in composition at each step level
Alaska Division of Geological & Geophysical Surveys
-107.7808
1044.4022
RatioCaK
ratio of Calcium to Potassium as determined from 37Ar/39Ar
Alaska Division of Geological & Geophysical Surveys
-0.0047
20.4314
RatioCaKError
The one sigma error for each Ca/K determination.
Alaska Division of Geological & Geophysical Surveys
0.0001
4.9721
RatioClK
ratio of Chlorine to Potassium as determined from 38Ar/39Ar
Alaska Division of Geological & Geophysical Surveys
-0.0002
0.1204
RatioClKError
The one sigma error for each Cl/K determination.
Alaska Division of Geological & Geophysical Surveys
0.0000
0.0964
Ratio40ArRad39ArK
ratio of radiogenic 40Ar to 39Ar derived from potassium
Alaska Division of Geological & Geophysical Surveys
5.592
783.8764
Ratio40ArRad/39ArKError
One sigma error for each 40ArRad/39ArK value
Alaska Division of Geological & Geophysical Surveys
0.0403
147.7079
AgeMa
calculated age for each temperature step for each sample
Alaska Division of Geological & Geophysical Surveys
35.9800
2418.7300
Millions of years
AgeErrorMa
one sigma error of the age determination of each heating step
Alaska Division of Geological & Geophysical Surveys
0.2500
841.5300
Millions of years
WeightedAverageOfJFromStandards
one sigma error of the age determination of each heating step
Alaska Division of Geological & Geophysical Surveys
J value, calculated from the weighted average of standards placed in various positions in the nuclear reactor
Alaska Division of Geological & Geophysical Surveys
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
(907)451-5050
dggspubs@alaska.gov
8 am to 4:30 pm, Monday through Friday, except State holidays
Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
RDF 2011-2
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.
DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
Contact DGGS for current pricing
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http://dx.doi.org/10.14509/22482
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DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media over the counter, by mail, phone, fax, or email from the DGGS Fairbanks office. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for exact shipping amount.
20160329
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
mailing and physical
3354 College Road
Fairbanks
AK
99709-3707
USA
(907)451-5020
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
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 Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.
http://www.dggs.alaska.gov/metadata/dggs.ext
dggs metadata extensions