1bcdee04-c74a-47b7-8993-4349d5eeae10_source eng; USA utf8 dataset Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 3354 College Road Fairbanks AK 99709-3707 USA pointOfContact 2014-10-10 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) 40Ar/39Ar data, Ray Mountains area, Bettles Quadrangle, Alaska 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Tuzzolino, A.L. originator Newberry, R.J. originator Benowitz, J.A. originator Layer, P.W. originator Freeman, L.K. originator http://dx.doi.org/10.14509/29124 REPORT, Raw Data File RDF 2014-19 12 p. 40Ar/39Ar analyses were performed on igneous rocks from the Ray Mountains area of west-central Alaska. The plutonic samples have ages from about 89 Ma to 109 Ma, while the volcanic samples show ranges from about 30 Ma to 64 Ma. The three volcanic samples fall into two age groups: the younger sample, a basalt, has an age of about 30 Ma, while the two older, rhyolitic samples fall between 58 Ma and 64 Ma. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. Products included in this data release are: a summary of sample collection method; the laboratory report, analytical data tables and associated metadata; and plots of the 40Ar/39Ar age spectra, Ca/K ratios, and Cl/K ratios. All components of this data release are available for download on the DGGS website at no charge. DGGS conducted a multi-year project from 2012 through 2013 studying the geology and economic potential of rare-earth elements (REEs) and base metals in the Ray Mountains in the Beaver, Bettles, Livengood, and Tanana quadrangles (Bachmann and others, 2013). As part of the bedrock geologic mapping, seven samples in the Bettles Quadrangle were collected for geochronologic analyses using 40Ar/39Ar techniques. These new age dates will allow us to better evaluate the geochronology of the granitic rocks that are the apparent source of the alluvial REE resources, and the geochronology of the volcanic rocks that relate to the development of the basins hosting the alluvial deposits. This project is funded through the Governor's Strategic and Critical Minerals Assessment Capital Improvement Project, a component of the ongoing 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. completed Alaska Division of Geological & Geophysical Surveys GIS Manager (907)451-5020 3354 College Road Fairbanks AK 99709-3707 USA dggsgis@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact asNeeded 40Ar/39Ar Age Dates Analyses Analyses and Sampling Analytical Lab Results Analytical Results Ar-Ar Bedrock Bedrock Geology Geochronology Geology Lab Methods Mineral Assessment Mineral Deposit Mineral Resources Sample Location Strategic and Critical Minerals Assessment Project theme Alaska Division of Geological & Geophysical Surveys Bettles Quadrangle Ray Mountains place Alaska Division of Geological & Geophysical Surveys Hot Springs Pluton Kanuti Pluton No Name Creek Pluton Ray River Pluton stratum Alaska Division of Geological & Geophysical Surveys Cretaceous Paleogene temporal Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America 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. otherRestrictions 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. otherRestrictions 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). 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 2013-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Bachmann, E.N. originator Blessington, M.J. originator Freeman, L.K. originator Newberry, R.J. originator Tuzzolino, A.L. originator Wright, T.C. originator Wylie, William originator http://dx.doi.org/10.14509/25386 Raw Data File RDF 2013-5 4 p crossReference Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska 2013-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Blessington, M.J. originator Reioux, D.A. originator Werdon, M.B. originator http://dx.doi.org/10.14509/25581 Raw Data File RDF 2013-7 2 p crossReference Rare-earth-element (REE) potential in the Ray Mountains area, central Alaska (poster): Alaska Miners Association Annual Convention, November 4-10, 2013 2013-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Tuzzolino, A.L. originator Newberry, R.J. originator Freeman, L.K. originator http://dx.doi.org/10.14509/26781 Poster and Presentation Tuzzolino, A.L. and others, 2013 1 sheet crossReference vector eng; USA geoscientificInformation -150.455470 -150.068310 66.057300 66.619410 2012-01-01 2014-01-01 The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >border: Outline of the study area >arar-summary-data-locations: Identification numbers, coordinates, sample descriptions, and summary ages of each sample >step-heating-data: Power output levels and resultant measurements from each sample run true ASCII tabular files unknown Alaska Division of Geological & Geophysical Surveys (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA 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. distributor Contact DGGS for current pricing Free download http://dx.doi.org/10.14509/29124 ASCII tabular files CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report 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 each sample varied according to the GPS settings specified by the collector. To provide a consistent coordinate system for all samples, all location coordinates were converted to decimal degrees, North American Datum of 1983 (NAD 83). Users should note that the interpretive summaries that are provided in the text report have been lightly edited for clarity but are generally provided as received from the lab. Users should note that the interpretive summaries that are provided in the text report have been lightly edited for clarity but are generally provided as received from the lab. No topologic relationships are present in the data. We plotted the data points using GIS software to ensure that they are correctly located and we visually reviewed the sample identification numbers and other attribute values to ensure that they are free of typological errors. This lineage was generated by the FGDC CSDGM to 19139 transformation Fieldwork - Field geologists (2012-2013) collected rock samples from surface outcrops. Care was taken to collect fresh, unweathered samples displaying, when possible, sufficiently large grains for mineral separate sampling. 2013-01-01T00:00:00 Sample preparation and analysis - Prior to processing, thin sections of the samples were petrographically inspected to ensure that mineral specimens selected for dating were free of alteration. Rock samples that we found to be suitable for dating by 40Ar/39Ar geochronology analysis were submitted to the Geochronology Laboratory at the University of Alaska Fairbanks (UAF) where they were dated according to the protocols outlined in the accompanying report. 2013-01-01T00:00:00 Coordinate system conversion - The originating coordinate system for each sample varied according to the GPS settings specified by the collector. To provide a consistent coordinate system for all samples, all location coordinates were converted to decimal degrees, North American Datum of 1983. 2014-01-01T00:00:00 otherRestrictions Metadata Use Constraints: 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. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 3354 College Road Fairbanks AK 99709-3707 USA pointOfContact