border: Outline of the study area. geochron-data: geochronology lab files and applicable documentation. geochron-summary: Identification numbers, coordinates, sample descriptions, and summary ages of each sample.
Tuzzolino, A.L., O'Sullivan, P.B., Freeman, L.K., and Newberry, R.J., 2016, Zircon U-Pb age data, Ray Mountains area, Bettles Quadrangle, Alaska: Raw Data File RDF 2016-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This is a point data set.
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.
The horizontal datum used is World Geodetic System of 1984.
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.
Generic example of a sample identifier: YYYYAAA9999X: YYYY= four digits of year, AAA=geologist's initials (one to three characters), 999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.
The lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided to the lab does differ from the number assigned in the field. We provide both numbers to document instances in which the sample numbers in the lab files differ from the field sample number.
| Range of values | |
|---|---|
| Minimum: | 66.05439 |
| Maximum: | 66.51191 |
| Units: | decimal degrees |
| Range of values | |
|---|---|
| Minimum: | -150.5026 |
| Maximum: | -150.047 |
| Units: | decimal degrees |
The rock we sampled were collected from: Kgr - Kanuti Pluton, Kgr - Hot Springs Pluton, Kgr - Ray River Pluton, and Kgr - No Name Creek Pluton units.
A brief sample and/or station description.
| Range of values | |
|---|---|
| Minimum: | 46 |
| Maximum: | 55 |
| Range of values | |
|---|---|
| Minimum: | 17 |
| Maximum: | 26 |
| Range of values | |
|---|---|
| Minimum: | 60 |
| Maximum: | 60 |
| Range of values | |
|---|---|
| Minimum: | 98.6 |
| Maximum: | 111.7 |
| Units: | Ma |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 1.3 |
| Range of values | |
|---|---|
| Minimum: | 98 |
| Maximum: | 111.6 |
| Units: | Ma |
| Range of values | |
|---|---|
| Minimum: | 0.9 |
| Maximum: | 1.3 |
This project was funded by the Alaska State Legislature through the Strategic and Critical Minerals Assessment project, a constituent of the Alaska Airborne Geophysical/Geological Mineral Inventory program. Samples in this report were collected by Rainer Newberry, Amy Tuzzolino, and Colby Wright of the University of Alaska Fairbanks. Margaret Donelick (A2Z) provided technical assistance with sample preparation; Paul O'Sullivan and Ray Donelick (A2Z), as well as Rainer Newberry and Alicja Wypych (DGGS), provided assistance with LA-ICP-MS data interpretation.
907-451-5020 (voice)
dggsgis@alaska.gov
DGGS conducted a multi-year project, from 2012 through 2013, to study the geology and economic potential of rare-earth elements (REE) and other metals in the Ray Mountains in the Beaver, Bettles, Livengood, and Tanana quadrangles. To better understand the granitic rocks that are associated with REE and tin-polymetallic occurrences in the area, four samples were collected for U-Pb geochronologic analyses. These new age analyses will allow us to better evaluate the geochronology of the granitic rocks that are the apparent source of the alluvial REE and tin resources.
Barker, J.C., and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: Information Circular IC 9104, U.S. Bureau of Mines, United States.Online Links:
Miller, T.P., 1989, Contrasting Plutonic Rock Suites of the Yukon-Koyukuk basin and the Ruby Geanticline, Alaska: null v. 94, no. B11, American Geophysical Union, USA.
Data sources used in this process:
Bachmann, E.N., Blessington, M.J., Freeman, L.K., Newberry, R.J., Tuzzolino, A.L., Wright, T.C., and Wylie, William, 2013, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and stream sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska: Raw Data File RDF 2013-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Tuzzolino, A.L., Freeman, L.K., and Newberry, R.J., 2014, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock samples collected in 2013 in the Ray Mountains area, Bettles A-1 and A-6 quadrangles, Alaska: Raw Data File RDF 2014-17, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This data is being released in the DGGS Raw Data File series. The information has been examined by several geologists familiar with the study area, but the data and accompanying report have not been reviewed for technical content or for conformity to the editorial standards of DGGS. Questions regarding the accuracy of information in the the A2Z data files can be best answered by the originating lab.
Locations were recorded using handheld, WAAS-enabled GPS devices. WAAS-enabled GPS devices have a reported error of about 1 m (NSTB/WAAS T&E Team, 2006). Depending on degradation of the WAAS and GPS signals, the horizontal position error of sample locations in this report is in the range of 1-10 m. The originating coordinate system for samples collected in 2012 (2012CW033A, 2012RN364A and 2012RN418A) was NAD27, UTM zone 5. Sample 2013AT135A was collected using WGS1984 Web Mercator Auxiliary Sphere coordinate system as specified by the settings of the collectors used. To provide a consistent coordinate system for all samples, all location coordinates of the samples collected in 2012 were transformed to WGS1984 Web Mercator Auxiliary Sphere using NAD_1927_To_NAD_1983_Alaska+WGS_1984_(ITRF00)_To_NAD_1983 transformation.
This data release is complete.
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.
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RDF 2016-7
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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 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: | ASCII tabular files |
|---|---|
| Network links: |
<http://dx.doi.org/10.14509/29662> |
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