fe660971-073d-454b-84c8-e02f8060e629_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 2014-08-06 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) 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 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Tuzzolino, A.L. originator Freeman, L.K. originator Newberry, R.J. originator http://dx.doi.org/10.14509/27325 REPORT,DIGITAL DATA Raw Data File RDF 2014-17 3 p. In 2012, the State of Alaska established its Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), to evaluate Alaska's statewide potential for SCM resources. The project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For decades, the Ray Mountains area of west-central Alaska has been explored for its potential mineral resources. To further assess the rare-earth-element (REE) potential of the State-selected and top-filed lands in the Ray Mountains area, mineral-resource geologists at DGGS carried out a helicopter-supported geological and geochemical resource assessment spanning the Beaver, Bettles, Livengood, and Tanana quadrangles. The results of this work highlighted anomalously high heavy-REE concentrations in panned concentrate samples from No Name Creek gravels, as well as variability of REE concentrations in the source plutons, specifically the Fort Hamlin Hills pluton. Consequently, the mineral-resource staff at DGGS undertook an additional resource assessment in the northern Fort Hamlin Hills area, part of the Bettles A-1 and A-6 quadrangles, from August 20 through 23, 2013, to augment the current geochemical data for the northern part of the Fort Hamlin Hills pluton (now designated the No Name pluton) and to better understand the petrogenesis of the granites and their contribution to the potential alluvial REE resource. The geochemistry dataset generated by this project is being released in digital format as .PDF and .CSV files. These files are available from the DGGS website at no charge. In 2012, the State of Alaska established its Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), to evaluate Alaska's statewide potential for SCM resources. The project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For decades, the Ray Mountains area of west-central Alaska has been explored for its potential mineral resources. To further assess the rare-earth-element (REE) potential of the State-selected and top-filed lands in the Ray Mountains area, mineral-resource geologists at DGGS carried out a helicopter-supported geological and geochemical resource assessment spanning the Beaver, Bettles, Livengood, and Tanana quadrangles. The results of this work highlighted anomalously high heavy-REE concentrations in panned concentrate samples from No Name Creek gravels, as well as variability of REE concentrations in the source plutons, specifically the Fort Hamlin Hills pluton. Consequently, the mineral-resource staff at DGGS undertook an additional resource assessment in the northern Fort Hamlin Hills area, part of the Bettles A-1 and A-6 quadrangles, from August 20 through 23, 2013, to augment the current geochemical data for the northern part of the Fort Hamlin Hills pluton (now designated the No Name pluton) and to better understand the petrogenesis of the granites and their contribution to the potential alluvial REE resource. The geochemistry dataset generated by this project is being released in digital format as .PDF and .CSV files. These files are available from the DGGS website at no charge. Location data were, in part, prepared by Erik Bachmann. Geochemical analyses were assisted by Alicja Wypych. Analyses were funded by the State of Alaska's Strategic and Critical Minerals Assessment CIP, which is 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 notPlanned Base Metals Batholith Bedrock Cerium Chlorite Critical Minerals Dysprosium Economic Geology Erbium Europium Exploration Felsic Fluorine Gadolinium Geochemical Data Geochemical Surveys Geochemistry Geology Gneiss Greisen Heavy Metals Holmium Hornfels Igneous Rocks Iron Lanthanide Elements Lanthanum Lode Lutetium Major Oxides Metals Metamorphic Rocks Metavolcanic rocks Mineral Assessment Mineral Deposit Mineral Localities Mineral Resources Minor Oxides Monazite Neodymium Phosphorus Placer Praseodymium Promethium Rare Earth Elements Ree Resource Assessment Resources Rhyolite Rubidium Samarium Sample Location Scheelite Schist Silica Silver Strategic Minerals Strategic and Critical Minerals Assessment Project Thallium Thorium Tin Titanium Tourmaline Trace Elements Trace Geochemical Trace Metals theme Alaska Division of Geological & Geophysical Surveys Bettles Quadrangle Dalton Highway Fort Hamlin Hills No Name Creek Ray Mountains Ray River place Alaska Division of Geological & Geophysical Surveys Angayucham Terrane Fort Hamlin Hills Pluton No Name Creek Pluton Ruby Terrane Tozitna Terrane stratum Alaska Division of Geological & Geophysical Surveys Cretaceous Mesozoic Phanerozoic Quaternary Tertiary 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 vector eng; USA geoscientificInformation -150.123602 -150.045819 66.097936 66.126818 2013-01-01 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. >rock-major-minor-oxide-trace-element-ree: Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples >rock-trace-element-ree: Trace-element analysis of pulverized rock samples >slab-xrf-major-minor-oxide-trace-element: Major- and minor-oxide and trace-element analysis of rock-slab samples 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/10.14509/27325 ASCII tabular files CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report Location data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Data were merged into an ArcGIS geodatabase. WAAS-enabled GPS devices have a reported error of about 1 m; 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 to 10 meters. Latitude and longitude are reported in the WGS 1984 datum. This dataset provides the analytical results for all of the samples that were submitted for geochemical analysis. This dataset provides the analytical results for all of the samples that were submitted for geochemical analysis. not applicable This lineage was generated by the FGDC CSDGM to 19139 transformation Sample collection - Samples of visibly mineralized rock or those containing features associated with mineralization were preferentially collected and later analyzed for their trace-element geochemistry. Samples are typically 'grab' samples, which were randomly collected at a location. Igneous and meta-igneous rocks showing minor alteration or weathering were collected for major-oxide, minor-oxide, and trace-element analyses to determine bulk rock compositions, or to identify the tectonic setting of a sample's protolith from petrogenetically important trace elements. Several fine-grained igneous and meta-igneous rocks were collected for 'slab' X-ray fluorescence (slab XRF) petrographic analysis. Location data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Data were merged into an ArcGIS geodatabase. 2013-01-01T00:00:00 Sample preparation - Rock samples were prepared by ALS Minerals in accordance with their PREP-31 package, which involves crushing the entire sample to greater than 70 percent passing -10 mesh (2 mm), then splitting off 250 grams and pulverizing the split to greater than 85 percent passing 75 microns. Prior to crushing, samples for whole-rock analyses were trimmed by DGGS staff to remove weathering, and cut surfaces were sanded to remove any saw metal. Rock samples that were collected for slab XRF analysis were cut into nominal 4-cm-diameter disks using a tile saw. The surfaces to be analyzed were polished to a smooth, uniform surface using 60 grit and 220 grit compound on a lapidary wheel. 2013-01-01T00:00:00 Analysis of major- and trace-element compositions - Trace-element compositions for rock samples were determined using four-acid digestion, followed by inductively coupled plasma-mass spectroscopy (ICP-MS) (ALS Minerals method ME-MS61, and ME-MS61r). Considering REEs may not be totally soluble in the aforementioned method, trace-element compositions were also determined using lithium metaborate fusion digestion, again followed by ICP-MS (ALS Minerals method ME-MS81). 2013-01-01T00:00:00 Whole-rock geochemistry analysis - Major and minor oxides for whole-rock geochemistry samples were analyzed by lithium metaborate fusion digestion and ICP-AES (ALS Minerals method ME-ICP06), loss on ignition was determined via OA-GRA05 method. Trace elements, including rare-earth elements, were determined using lithium metaborate fusion digestion, and ICP-MS (ALS Minerals method ME-MS81). Metals were determined by four-acid digestion and ICP-AES (ALS Minerals method ME-ICP61). 2013-01-01T00:00:00 Slab XRF analysis - For slab XRF samples, polished sample slabs were directly analyzed using the PANalytical Axios wavelength-dispersive XRF and SuperQâ„¢ software at the University of Alaska Fairbanks. Nb, Rb, Sr, Y, and Zr were measured using the 37mmRbSrYZr analytical routine; other elements were measured with the IQ+37mmVac analytical routine. The 37mmRbSrYZr routine uses specific predetermined peak and background positions for which X-ray intensities are measured for 2-800 seconds (depending on the element). The intensity of the Rh Compton peak is used to estimate mass-absorption coefficients (MACs) for both unknowns and well-characterized natural standards. Peak intensities are computed and converted to concentrations using calibration curves employing at least ten natural rock standards. These procedures are routinely checked by analysis of secondary natural standards that were not employed in making the calibration curves. Elemental abundances are typically within 2-5 percent of the amount present for concentrations greater than 10 times the detection limit; within 5-10 percent of the amount present for concentrations 4-10 times the detection limit, and within 30 percent of the amount present for concentrations near the detection limit. The IQ37mmVac program scans over a series of energies corresponding to a range from Ce K-alpha to O K-alpha. Peak heights and backgrounds, and X-ray elemental interferences are picked with the software and checked manually to ensure quality control. Elemental abundances for all elements with atomic numbers between 8 and 92 are estimated from artificial standards; these estimations are used to calculate MACs for each element present above the detection limit. Revised concentrations are employed to calculate revised MACs until a stable solution is determined. The software is routinely checked using pressed pellets of well-characterized natural rock standards. Elemental abundances are within 1-2 percent of the amount present for major elements, 2-5 percent of the amount present for minor elements, and 5-10 percent of the amount present for trace elements. 2013-01-01T00:00:00 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