e3def419-123c-4133-8f3d-03ded6e064e1_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 2014-12-05 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) 40Ar/39Ar data, Styx River map area, Lime Hills C-1 Quadrangle, Alaska 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Benowitz, J.A. originator Layer, P.W. originator Sicard, K.R. originator http://dx.doi.org/10.14509/29134 REPORT, Raw Data File RDF 2014-21 v. 1.0.1 13 p. This DGGS Raw Data File presents 40Ar/39Ar age dating results for selected igneous rocks encountered in the Styx River area of the western Alaska Range. Crystallization ages on biotite and hornblende from plutonic rocks range from about ~60 to ~63 Ma, while a sericite alteration age in plutonic rocks altered by a dike swarm also is around ~63 Ma. Sericite alteration associated with a copper-molybdenum porphyry ranges from ~10 to ~11 Ma. Analyses were performed by the University of Alaska Fairbanks Geochronology Laboratory, and results were reported by Paul Layer and Jeff Benowitz. This data release includes the following products: a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra, Ca/K, and Cl/K ratios. All components of this data release are downloadable from the DGGS website at no charge. We selected samples for 40Ar/39Ar analysis to characterize and distinguish plutonic complexes and mineralization events, and to unravel the magmatic, structural, and metallogenic evolution of the area. The study area was selected primarily because it was located in the survey tracts with the largest number of plutons and volcanic rocks according to previous regional geologic mapping. 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. Samples in this report were collected, described, logged, and prepared in part by Larry Freeman, David Reioux, Karri Sicard, Evan Twelker, Erik Bachmann, Amy Tuzzolino, and Alicja Wypych of DGGS and by Rainer Newberry of the University of Alaska Fairbanks Department of Geology & Geophysics. 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 40Ar/39Ar Age Dates Airborne Geophysical Survey Analyses and Sampling Analytical Results Ar-Ar Bedrock Geology Copper Economic Geology Faults Fracturing Geochronology Geology Gold Hornblende K-Feldspar Lab Methods Mica Mineral Deposit Mineral Prospect Mineralogy Minerals Mining Mining Claims Molybdenite Muscovite Ore Deposit Model Plutonic Rocks Plutons Polymetallic Vein Porphyry Pyrite Pyrrhotite Quartz Sample Location Sericite Sericite Alteration Volcanic Rocks theme Alaska Division of Geological & Geophysical Surveys Alaska Range Lime Hills Quadrangle Styx River place Alaska Division of Geological & Geophysical Surveys Cretaceous Jurassic Miocene 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). Major-oxide, minor-oxide, and trace-element geochemical data from rocks in the Styx River area, Lime Hills C-1 Quadrangle, Lime Hills, McGrath, Talkeetna, and Tyonek quadrangles, Alaska 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Sicard, K.R. originator Wypych, Alicja originator Twelker, Evan originator Bachmann, E.N. originator Freeman, L.K. originator Newberry, R.J. originator Reioux, D.A. originator Tuzzolino, A.L. originator Wright, T.C. originator http://dx.doi.org/10.14509/27289 Raw Data File RDF 2014-6 4 p crossReference vector eng; USA geoscientificInformation -153.320334 -153.022560 61.541464 61.695701 2013-01-01 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/10.14509/29134 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. 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. not applicable This lineage was generated by the FGDC CSDGM to 19139 transformation Fieldwork - Field geologists (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 The text and tables were revised to correct inconsistencies and to clarify reporting of the preferred ages. 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