4d90b597-474a-48b9-be6c-4521986df48b_source eng; USA utf8 dataset Jennifer Athey State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Geologist 907-451-5020 907-451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8:00 am to 4:30 pm, Monday through Friday, except State holidays. Please contact us through the e-mail address given above whenever possible. pointOfContact 2010-04-20 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Major-oxide, minor-oxide, and trace-element geochemical data from rocks collected in the Chistochina mining district, Mount Hayes Quadrangle, Alaska, in 2005-2009 2010-01-01 publication State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Fairbanks AK, USA publisher Athey, J.E. originator Freeman, L.K. originator Hults, C.P. originator Szumigala, D.J. originator Werdon, M.B. originator Denny, C.L. originator International Tower Hill Mines Ltd. originator http://dx.doi.org/10.14509/20661 TABULAR DIGITAL DATA, REPORT Raw Data File RDF 2010-2 130 pp. Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a geological field survey, including mapping and sampling in the Chistochina mining district in the Mount Hayes A-2 and A-3 quadrangles, Alaska, from June 30 to July 15, 2009. The fieldwork provides basic information critical to building an understanding of Alaska's geology and is part of an integrated program of airborne geophysical surveys followed by geological mapping. During 2009, 57 rock samples were collected for geochemical trace-element analysis, 107 rock samples were collected for whole rock (major- and minor-oxide and petrogenetically important trace elements) analyses, and 2 samples were collected for analysis of non-carbonate carbon content. Additionally, 288 polished rock slabs were analyzed for whole rock and petrogenetically important trace elements. This report also contains geochemical trace-element analyses from the Mount Hayes A-2 Quadrangle, Alaska, for 359 rock samples collected by International Tower Hill Mines Ltd. (ITH) from July 2005 through August 2008 as part of the Chisna Project. These data were kindly donated to DGGS in 2009 to aid DGGS investigations. The analyses in this report were acquired as part of a geologic mapping program, the purpose of which is to provide 1:50,000-scale geologic mapping of a portion of the Slate Creek-Slana River airborne geophysical surveys released by DGGS in 2009 (Burns et al., 2009). The geophysical survey (helicopter-based aeromagnetic and electromagnetic data) and geologic mapping are part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program, a special multi-year investment by the State of Alaska to expand Alaska's geologic and mineral resources knowledge base, catalyze future private-sector mineral exploration and development, and guide state resource development planning. This project is part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by 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 U.S. Geological Survey STATEMAP Program under award number G09AC00177 and the Alaska State General Fund. completed notPlanned Geochemical Data Geochemistry Major Oxides Minor Oxides Platinum Group Elements STATEMAP Project Trace Elements Trace Metals theme None Alaska, State of Alaska Range Chisna Chistochina Mining District Mount Hayes Quadrangle Slate Creek (Mount Hayes) Slate Creek Prospect place None Mankomen Group Nikolai Greenstone Wrangellia Terrane stratum None Cretaceous Jurassic Pennsylvanian Permian Triassic temporal None The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester 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. 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. otherRestrictions Access Constraints: This report, map, and/or dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Line, grid, and vector data, and maps for the airborne geophysical survey of the Slate Creek-Slana River Survey, Chistochina mining district, south-central Alaska 2009-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks AK publisher Burns, L.E. originator Fugro Airborne Surveys Corp. originator Stevens Exploration Management Corp. originator http://dx.doi.org/10.14509/19621 RASTER DIGITAL DATA, TABULAR DIGITAL DATA, AND VECTOR DIGITAL DATA Alaska Division of Geological & Geophysical Surveys Geophysical Report GPR 2009-1 1 database, 6 grids, 6 vector files, and 18 maps crossReference vector eng; USA geoscientificInformation Native Dataset Environment: Adobe Acrobat Reader, any spreadsheet program or text editor. Technical Prerequisites: CSV (Comma Separated Value) files can be imported and formatted with Microsoft Excel, OpenOffice.org Calc, or most spreadsheet and text editor programs. -145.1403 -144.5990 63.0609 63.2217 2005-07-01 2009-07-15 The data are available in tabular format as comma delimited ascii files organized into five layers, as described in this metadata file under the "Entity_and_Attribute_Information" section. The layers are as follows: >DGGS trace-element rock geochemistry: sample locations and > descriptions, geochemical data, analytical methods and > detection limits (Tables 1, 2, 3) >DGGS whole rock major-oxides, minor-oxides, and trace-elements: > sample locations and descriptions, geochemical data, analytical > methods and detection limits (Tables 4, 5, 6) >DGGS non-carbonate carbon geochemistry: sample locations and > descriptions, and geochemical data (Table 7) >DGGS rock slab major-oxides, minor-oxides, and trace-elements: > sample locations and descriptions, geochemical data, analytical > methods and detection limits (Tables 8 and 9) >ITH trace-element rock geochemistry: sample locations and > descriptions, geochemical data, analytical methods and > detection limits (Tables 10, 11, 12) true Entity and Attribute Information Entity and Attribute Overview: RDF 2010-2 has twelve entities containing attributes that need to be defined. The entities are grouped in five thematic layers under the "Entity_and_Attribute_Information � Detailed_Description" section. The layers are as follows: >DGGS trace-element rock geochemistry: sample locations and > descriptions (Table 1), geochemical data (Table 2), analytical > methods and detection limits (Table 3) >DGGS whole rock major-oxides, minor-oxides, and trace-elements: > sample locations and descriptions (Table 4), geochemical data > (Table 5), analytical methods and detection limits (Table 6) >DGGS non-carbonate carbon geochemistry: sample locations and > descriptions, and geochemical data (Table 7) >DGGS rock slab major-oxides, minor-oxides, and trace-elements: > sample locations and descriptions, and geochemical data (Table > 8), analytical methods and detection limits (Table 9) >ITH trace-element rock geochemistry: sample locations and > descriptions (Table 10), geochemical data (Table 11), > analytical methods and detection limits (Table 12) Entity and Attribute Detail Citation: This report PDF 1.6 CSV unknown State of Alaska, Department of Natural Resources, 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 web site (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 Printed publication can be purchased for $13.00 (contact information below) plus shipping if mailed. Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. Ordering Instructions: Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (http://www.dggs.alaska.gov/) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Digital downloads: less than 30 minutes for most files. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid. http://dx.doi.org/10.14509/20661 PDF CSDGM IMPORT ERROR: No digtinfo/formcont information http://dx.doi.org/10.14509/20661 CSV CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report Location data collected by DGGS were downloaded from Garmin 12XL GPS units into an Access database. ITH location data were recorded by PDAs with an integrated GPS unit. Horizontal Positional Accuracy A value of estimated position error in meters was calculated by Garmin 12XL GPS units and recorded for each sample location. Estimated position error calculated by Garmin 12XL units was not better than 3 meters and averaged approximately 6 meters. The GPS system suffers from calculation and geometric error. This error results from items such as error in satellite positions, mathematical error introduced by the formulas used by the GPS unit for calculating position, and errors caused by narrow satellite alignments. Estimated position error is a value determined by the GPS manufacturer for the calculation and geometric error as a whole. Average position error of ITH�s GPS data is unknown but presumed to be of recreational GPS grade and similar in accuracy to the Garmin 12XL. 'Selective availability', a deliberate degradation of GPS data managed by the U.S. government, was not operating during the time period these samples were collected. meters 6 This dataset contains all of the analyses for trace-element geochemistry, whole rock (major- and minor-oxide, and trace element) geochemistry, and non-carbonate-carbon analyses for rock samples collected by DGGS in the Slate Creek project area in 2009. This dataset also contains Slate Creek area trace-element geochemical data collected by ITH, which is a subset of the data collected for the Chisna Project from 2005-2009. This dataset contains all of the analyses for trace-element geochemistry, whole rock (major- and minor-oxide, and trace element) geochemistry, and non-carbonate-carbon analyses for rock samples collected by DGGS in the Slate Creek project area in 2009. This dataset also contains Slate Creek area trace-element geochemical data collected by ITH, which is a subset of the data collected for the Chisna Project from 2005-2009. No topologic relationships are present in data. This lineage was generated by the FGDC CSDGM to 19139 transformation Fieldwork - Rock samples of visibly mineralized rock, or rock exhibiting features associated with mineralization, were collected and analyzed for geochemical trace elements. Spatially these rocks were collected randomly. Occasionally rocks exhibiting a specifc feature were selectively collected and these instances were noted in the sample description. 2009-07-01T00:00:00 Fieldwork - Rock samples collected for whole-rock (major oxides, minor oxides, and trace elements) analysis include samples representative of a typical lithology, igneous or possible meta-igneous samples in order to determine composition, and samples whose petrogenetically important trace-elements could indicate their original tectonic setting. Unweathered or minimally weathered rock samples were preferentially selected for analysis. Spatially these rocks were collected randomly. 2009-07-01T00:00:00 Fieldwork - Rock samples of visibly carbonaceous or graphitic rock were collected and analyzed for non-carbonate carbon content. Spatially these rocks were collected randomly. Unweathered or minimally weathered rock samples were preferentially selected for analysis. 2009-07-01T00:00:00 Sample Preparation - All sample preparation was conducted at the ALS Chemex sample preparation facility in Fairbanks, Alaska, except for preparation of whole-rock samples for analysis at the University of Alaska Fairbanks. Rocks intended for whole-rock analysis by ALS Chemex and with a weathering rind were trimmed with a tile saw prior to sample preparation at the laboratory. Rock samples were crushed with a Terminator oscillating jaw crusher with chrome steel alloy plates so that at least 70 percent of the material passes through a -10 mesh (2 mm) screen. Representative aliquots of 250 grams each were taken using a stainless steel riffle splitter. These samples were then pulverized in a chrome steel ring mill so that 85 percent of the sample passed through a -200 mesh (75 micron) screen. Trace-element analyses, whole-rock oxide analyses, and gold analyses were performed using representative splits of each 250 gram pulp. 2009-12-01T00:00:00 Analysis, Tables 1-3 - All potentially mineralized samples were assayed for gold by inductively coupled plasma-atomic emission spectroscopy following a 30 gram (g) fire assay fusion (FA-ICP-AES). Platinum and palladium were assayed for selected samples by inductively coupled plasma-atomic emission spectroscopy following a 30 g fire assay fusion (FA-ICP-AES). Trace-element geochemical analyses were performed by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) methods after four-acid, near-total digestion. This method of digestion is possibly incomplete for some elements and may result in lower analytical results for these elements. The elements that may be affected by incomplete digestion, analytical methods, and lower and upper reporting limits are tabulated in Table 3. Rock samples with trace gold and/or copper values above the detection limit in the initial trace element geochemical analysis were reanalyzed for those metals by the following methods: gold, fire assay with a gravimetric finish using a 30 gram sub-sample; copper, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) methods after four-acid, near-total digestion. Detection limits for the second set of analyses are listed in Table 3. 2009-12-01T00:00:00 Analysis, Tables 4-6 - Major- and minor-element oxides were determined at ALS Chemex by XRF following a lithium borate fusion. Trace-element values for Ba, Nb, Rb, Sr, Y, and Zr were determined by XRF on a pressed pellet. Analytical methods and detection limits are tabulated in Table 6. 2009-12-01T00:00:00 Analysis, Table 7 - Non-carbonate carbon analyses were performed by ALS Chemex. Non-carbonate carbon content was determined using a LECO furnace after a dilute acid digestion. The lower detection limit for non-carbonate carbon is 0.01 percent, and the upper detection limit is 50.00 percent. 2009-12-01T00:00:00 Analysis, Tables 8-9 - XRF spectroscopic analyses performed at UAF were standardized using well-characterized natural fine-grained rock and pure mineral standards as well as conventional pressed pellets of international rock standards. Because volatile components were not measured and rocks were of varying porosities, the analyses were normalized to 100 percent totals. In the vast majority of cases the original analyses yielded totals of approximately 95 to 102 weight percent. Comparison between these analyses and those produced on the same rocks by conventional pressed pellet (trace elements) and fused disk (major and minor oxides) techniques indicates that major- and minor-oxide and trace-element concentrations are most likely within 10 percent of the �true� concentrations. Analytical methods and detection limits are tabulated in Table 9. 2009-12-01T00:00:00 Analysis, Tables 10-12 - All samples were analyzed for gold using a 50 g fire assay fusion and either ICP-AES or atomic absorption spectrometry (AAS). Trace-element geochemical analyses were performed by inductively coupled plasma-mass spectrometry (ICP-MS) methods after four-acid, near-total digestion. This method of digestion is possibly incomplete for some elements and may result in lower analytical results for these elements. Samples with greater than 10 percent calcium and showing interference were reanalyzed by ICP-AES, and these results are shown. Mercury was analyzed by aqua regia digestion/cold vapor-AAS (detection limits on samples requiring dilutions for mercury analysis were increased according to the dilution factor). The elements that may be affected by incomplete digestion, analytical methods, and lower and upper reporting limits are tabulated in Table 12. Rock samples with trace metal values above the detection limit in the initial trace element geochemical analysis were reanalyzed for those metals by the following methods: gold, fire assay with a gravimetric finish using a 50 gram sub-sample; silver and copper, ICP-AES methods after four-acid, near-total digestion; sulfur, total sulfur by Leco furnace. Detection limits for the second set of analyses are listed in Table 12. 2008-01-01T00:00:00 Other - Latitude and Longitude values in Tables 1, 3, 7, 8, and 10 were converted from UTM values using a spreadsheet designed by Steven Dutch, Natural and Applied Sciences, University of Wisconsin - Green Bay, http://www.uwgb.edu/dutchs/usefuldata/UTMFormulas.HTM. 2010-01-01T00:00:00 otherRestrictions Metadata Access Constraints: none otherRestrictions Metadata Use Constraints: If the user has modified the data in any way the user is obligated to describe the types of modifications the user has performed in the supporting metadata file. User specifically agrees not to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, 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. Jennifer Athey State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Geologist 907-451-5020 907-451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8:00 am to 4:30 pm, Monday through Friday, except State holidays. Please contact us through the e-mail address given above whenever possible. pointOfContact