border: A polygon shapefile that provides a generalized outline of the map extent. BonBdrkPoly: Polygons that record the distribution of mapped or interpreted geologic units. BonFieldPoints: Locations of observation points by field geologists, includes locations where rocks samples were collected, described, structures were measured, or general notations were made. BonStrPoints: Data describing geologic structures measured in the field using geologic compass and inclinometer. Data includes planar measurements in azimuth and dip, dip direction 90 degrees clockwise from strike, lineation measurements in azimuth trend and plunge, and surficial trend measurements, dip is given as 0 but is annotated in comments attribute.
Freeman, L.K., Newberry, R.J., Werdon, M.B., Szumigala, D.J., Andrew, J.E., and Athey, J.E., 2016, Preliminary bedrock geologic map data for the eastern Bonnifield mining district, Fairbanks and Healy quadrangles, Alaska: Preliminary Interpretive Report PIR 2016-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This is a vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest .00000001
Ordinates (y-coordinates) are specified to the nearest .00000001
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 1/294.9786982.
| Formal codeset | |
|---|---|
| Codeset Name: | PIR 2016-3 |
| Codeset Source: | Alaska Division of Geological & Geophysical Surveys |
| Formal codeset | |
|---|---|
| Codeset Name: | FGDCGeoAge font |
| Codeset Source: | Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates. |
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: JC = James Clough, JEA= Jen Athey, JOE = Joe Andrew, KB = Kate Bull, LF= Larry Freeman, MBW = Melanie Werdon, RN = Rainer Newberry, Z = David Szumigala. Note: station numbers have been edited and standardized to provide consistency throughout various datasets in which they occur and may differ slightly from annotations written on sample bags, rock boxes, and samples.
| Range of values | |
|---|---|
| Minimum: | 459093 |
| Maximum: | 491921 |
| Units: | meters |
| Range of values | |
|---|---|
| Minimum: | 7104422 |
| Maximum: | 7078587 |
| Units: | meters |
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: JC = James Clough, JEA= Jen Athey, JOE = Joe Andrew, KB = Kate Bull, LF= Larry Freeman, MBW = Melanie Werdon, RN = Rainer Newberry, Z = David Szumigala. Note: station numbers have been edited and standardized to provide consistency throughout various datasets in which they occur and may differ slightly from annotations written on sample bags, rock boxes, and samples.
| Range of values | |
|---|---|
| Minimum: | 491921 |
| Maximum: | 459094 |
| Units: | meters |
| Range of values | |
|---|---|
| Minimum: | 7102926 |
| Maximum: | 7104422 |
| Units: | meters |
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| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 359 |
| Units: | degrees |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 90 |
| Units: | degrees |
free text
axial plane, not symbolized
bedding, 6.2 – inclined bedding
cleavage, 7.2 – inclined cleavage
contact, 1.4 – Inclined contact, dike, key bed, clay bed, coal bed,or bed of economically important commodity
crenulation, 9.133 – inclined crenulation lineation
dike, not symbolized
elongation, 9.49 – Inclined aligned stretched-object lineation
fault, 2.15.1 – Small, minor inclined fault
fold axis, 9.97 – Inclined fold hinge of generic small, minor fold
foliation, 8.3.2 – Inclined metamorphic or tectonic foliation
horiz bedding, 6.1 – Horizontal bedding
horiz cleavage, 7.1 – Horizontal cleavage
horiz fold axis, 9.99 – Horizontal fold hinge of generic small, minor fold
horiz foliation, 8.3.1 – Horizontal metamorphic or tectonic foliation
intersection, 9.81 – Inclined lineation at intersection of two cleavages
joint, 4.3.2 – Small, minor inclined joint
lineation, 9.3 – Inclined generic lineation or linear structure
overturned bedding, 6.4 – Overturned bedding
shear, 7.14 – Inclined disjunctive, spaced cleavage
slickensides, 9.17 – Inclined slickenline, groove, or striation on fault surface
striae, 9.17 – Inclined slickenline, groove, or striation on fault surface
vein, 19.1.12 – Small, minor inclined vein, veinlet, or mineralized stringer
vert axial plane, not symbolized
vert dike, not symbolized
vert fault, not symbolized
vert foliation, 8.3.4 – Vertical metamorphic or tectonic foliation
vert joint, 4.3.3 – Small, minor vertical or near-vertical joint
symbol
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 geochemical analyses was also provided through the State of Alaska General Fund and the U.S. Geological Survey STATEMAP Program under award number 08HQAG0051. 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.
907-451-5020 (voice)
dggsgis@alaska.gov
The objective of the eastern Bonnifield project is to produce a 1:50,000-scale geologic map to foster a better understanding of the area's geology and mineral potential. Although DGGS concentrated on mapping the Paleozoic metamorphic rocks that host the volcanogenic massive sulfide deposits (VMS) and Mesozoic igneous rocks associated with Au-Ag-As-Sb veins, we also studied the Tertiary sedimentary section, which could contain coal resources.
Athey, J.E., Newberry, R.J., Werdon, M.B., Freeman, L.K., Smith, R.L., and Szumigala, D.J., 2006, Bedrock geologic map of the Liberty Bell area, Fairbanks A-4 Quadrangle, Bonnifield mining district, Alaska: Report of Investigation RI 2006-2 v. 1.0.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Benowitz, J.A., Layer, P.W., and 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: Raw Data File RDF 2011-2 v. 1.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Burns, L.E., Fugro Airborne Surveys Corp., Stevens Exploration Management Corp., Graham, G.R.C., and Emond, A.M., 2016, Bonnifield mining district electromagnetic and magnetic airborne geophysical survey, data compilation: Geophysical Report GPR 2016-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Burns, L.E., Fugro Airborne Surveys Corp., and Stevens Exploration Management Corp., 2007, Line, grid, and vector data, and plot files for the airborne geophysical survey of part of the Bonnifield mining district, Interior Alaska: Geophysical Report GPR 2007-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Burns, L.E., Fugro Airborne Surveys Corp., and Stevens Exploration Management Corp., 2007, Total magnetic field of part of the Bonnifield mining district, Interior Alaska: Geophysical Report GPR 2007-1-1A, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Burns, L.E., Fugro Airborne Surveys Corp., and Stevens Exploration Management Corp., 2007, Total magnetic field of part of the Bonnifield mining district, Interior Alaska: Geophysical Report GPR 2007-1-1B, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Freeman, L.K., Newberry, R.J., Andrew, J.E., Szumigala, D.J., Werdon, M.B., Athey, J.E., and Burns, L.E., 2013, Geologic setting of syngenetic and epigenetic deposits in the eastern Bonnifield mining district, Alaska (presentation): Alaska Miners Association, 22nd Annual Biennial Mining Conference, March 9-13, 2010: Poster and Presentation Freeman, L.K. and others, 2013, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Freeman, L.K., Newberry, R.J., Wypych, Alicja, Werdon, M.B., Szumigala, D.J., Andrew, J.E., and Athey, J.E., 2016, Major-oxide, minor-oxide, and trace-element geochemical data from rocks collected in 2008 in the eastern Bonnifield mining district, Fairbanks and Healy quadrangles, Alaska: Raw Data File RDF 2016-6 v. 1.1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Freeman, L.K., Werdon, M.B., Szumigala, D.J., Andrew, J.E., Newberry, R.J., and Athey, J.E., 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: Raw Data File RDF 2009-1 v. 1.2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This report is intended to provide timely release of preliminary geologic interpretations. The report and accompanying digital dataset have been lightly reviewed for technical content. However, significant additional work is in progress to refine the geologic interpretations and ensure geospatial data integrity throughout the dataset. Note: station numbers have been edited and standardized to provide consistency throughout various datasets in which they occur and may differ slightly from annotations written on sample bags, rock boxes, and samples.
Estimated position errors calculated by the hand-held GPS were a minimum of 3 m; at many locations the horizon was limited by steep topography, resulting in positional errors of more than 100 m.
This report is intended to provide timely release of preliminary geologic interpretations. The report and accompanying digital dataset have been lightly reviewed for technical content. However, significant additional work is in progress to refine the geologic interpretations and ensure geospatial data integrity throughout the dataset.
not applicable
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.
(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov
PIR 2016-3
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.
| Data format: | Shapefiles |
|---|---|
| Network links: |
<http://dx.doi.org/10.14509/29661> |
(907)451-5020 (voice)