Metadata: Identification_Information: Citation: Citation_Information: Originator: Reifenstuhl, R.R. Originator: Newberry, R.J. Originator: Haug, S.A. Originator: Clautice, K.H. Originator: Liss, S.A. Originator: Weber, F.R. Publication_Date: 200903 Title: Chert geochemistry discriminant analysis and K-meas cluster analysis: Rampart Project area, Tanana B-1 Quadrangle, east-central Alaska Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2009-2 Publication_Information: Publication_Place: Fairbanks, Alaska Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: http://dx.doi.org/10.14509/19341 Description: Abstract: A pilot study using discriminant analysis on major oxide and minor element data from 67 chert samples in the Rampart area, southeastern Tanana and southwest Livengood Quadrangles, western Yukon-Tanana Upland, Alaska, generally indicates a unique geochemical signature for the cherts of a given unit. Chert samples from five known type locales were used as standards of comparison: 1) Livengood Dome Chert (Ordovician), 2) Amy Creek unit (Proterozoic to early Paleozoic), 3) Rampart Group (Mississippian to Triassic), 4) Troublesome Creek unit (Devonian), and 5) Permian-Triassic clastic unit (associated with the Triassic-dated gabbro). Samples from the above units were compared to chert from Tanana B-1 area-units of unknown or uncertain affinity. We have determined that discriminant analysis of chert geochemistry can assign chert profiles to specific units with only minor exceptions, and is useful in geologic mapping of the Tanana B-1 Quadrangle (Reifenstuhl and others, 1997). Purpose: This data was created to determine if discriminant analysis of chert geochemistry can assign chert profiles to specific units in order to facilitate geologic mapping of the Tanana B-1 Quadrangle Supplemental_Information: The data are available in tabular format as comma delimited ascii files organized into one layer in this metadata file under the "Entity_and_Attribute_Information" section. The layer is as follows: >Geochemistry sample locations sample names and locations, formation designations, geochemical results (Table 1) Time_Period_of_Content: Time_Period_Information: Multiple_Dates/Times: Single_Date/Time: Calendar_Date: 1988 Single_Date/Time: Calendar_Date: 1996 Single_Date/Time: Calendar_Date: 1998 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -150.533 East_Bounding_Coordinate: -138.333 North_Bounding_Coordinate: 65.09 South_Bounding_Coordinate: 65.5333 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Barium Theme_Keyword: Bedrock Geologic Map Theme_Keyword: Chemistry Theme_Keyword: Chert Theme_Keyword: Geochemical Surveys Theme_Keyword: Geochemical Data Theme_Keyword: Geochemistry Theme_Keyword: Major Oxides Theme_Keyword: Metasedimentary rocks Theme_Keyword: Methods Theme_Keyword: Phosphorus Theme_Keyword: Potassium Theme_Keyword: Rare Earth Elements Theme_Keyword: Rubidium Theme_Keyword: Silica Theme_Keyword: Strontium Theme_Keyword: Titanium Theme_Keyword: Trace Elements Theme_Keyword: Vanadium Theme_Keyword: Yttrium Theme_Keyword: Zirconium Place: Place_Keyword_Thesaurus: None Place_Keyword: Rampart Mining District Place_Keyword: Rampart-Manley Mining District Place_Keyword: Tanana Quadrangle Place_Keyword: Livengood Quadrangle Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Amy Dolomite Stratum_Keyword: Livengood Dome Chert Stratum_Keyword: Rampart Group Stratum_Keyword: Ruby Terrane Stratum_Keyword: Wickersham Unit Stratum_Keyword: Yukon-Tanana Terrane Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Devonian Temporal_Keyword: Mesozoic Temporal_Keyword: Paleozoic Temporal_Keyword: Permian Temporal_Keyword: Triassic Access_Constraints: This report, map, and/or data set are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Use_Constraints: Any hardcopies or published data sets utilizing these data sets 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 data sets, 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Contact_Position: GIS Data Manager/Cartographer Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Contact_Voice_Telephone: (907) 451-5020 Contact_Facsimile_Telephone: (907) 451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Contact_Instructions: You may view our web site at http://www.dggs.alaska.gov for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. Native_Data_Set_Environment: Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attributes in this dataset consist of: positional information reported in latitude and longitude (decimal degrees - NAD27) and major oxide and minor element geochemical data. All field locations were visually determined by the geologists in the field using a Brunton compass and altimeter and recorded on a 1:63,360 United States Geologic Survey topographic map. Coordinates were digitized visually from the field maps in the office on a digitizing table. The collected cherts were crushed and pelletized for X-Ray Fluorescence analyses at the University of Alaska Fairbanks, further detail regarding analytical methodology is not available. Logical_Consistency_Report: No topologic relationships are present in this data set. Completeness_Report: This dataset contains all of the chert samples that were collected from outcrops in the Tanana A-1 quadrangles from rock units of unknown or uncertain affinity. Representative samples of cherts typical each of local were selected based on a visual determination of their lithology. In addition several samples that were collected outside the primary area were also included. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Exact horizontal position accuracy is unknown but the locations are estimated to be accurate within 20 meters. Several samples have unknown or vaugely known localities and are noted as '---' within the dataset. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Dover, J.H. Publication_Date: 1994 Title: Geology of part of east-central Alaska Edition: v. G-1 Geospatial_Data_Presentation_Form: book chapter Publication_Information: Publication_Place: Boulder, CO Publisher: Geological Society of America Other_Citation_Details: in Plafker, G., and Berg, H.C., eds,. The Geology of Alaska Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: Unknown Ending_Date: Unknown Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Dover, 1994 Source_Contribution: source of regional geologic rock unit distribution Source_Information: Source_Citation: Citation_Information: Originator: Weber, F.R. Originator: Wheeler, K.L. Originator: Rinchart, C.D. Originator: Chapman, R.M. Originator: Blodgett, R.B. Publication_Date: 1992 Title: Geologic map of the Livengood quadrangle, Alaska Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 92-562 Other_Citation_Details: 20 p., 1 sheet (scale 1:250,000) Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1992 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Weber and others, 1992 Source_Contribution: Source of regional geologic rock unit distribution, description and correlation of surface exposures immediately east of the Tanana B-1 map area. Process_Step: Process_Description: As part of our 1:63,360 scale geologic field mapping of the Tanana B-1 Quadrangle, we collected chert outcrop samples with the plan of using geochemistry to test whether we might be able to discern differences in the cherts of different ages and different mappable rock units. Source_Used_Citation_Abbreviation: Dover, 1994 Source_Used_Citation_Abbreviation: Weber and others, 1992 Process_Date: 1996 Process_Step: Process_Description: The collected cherts were crushed and pelletized for X-Ray Fluorescence analyses at the University of Alaska Fairbanks. The pellets were analyzed for nineteen elements: ten major oxide elements measured in weight percent (aluminum, calcium, iron, potassium, magnesium, manganese, sodium, phosphorous, silicon, and titanium) and nine trace elements measured in parts per million (barium, cerium, chromium, lanthanum, rubidium, strontium, vanadium, yttrium, and zirconium). Process_Date: 1998 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.25722210088 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: Table 1 Entity_Type_Label: Table_1_data.csv Entity_Type_Definition: Table 1 is a summary of samples analyzed for geochemistry from the Rampart project area. Information includes sample name, the formation from which the samples were collected, coordinates of sample collection, and the geochemistry results. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Sample Attribute_Definition: "Sample" refers to the name of the sample given by the geologist. Naming convention is based on the two-digit year, the two-digit collector initials, and a unique sample identifier number. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: "Sample" refers to a unique identifier assigned by the geologist. Samples are named by 2 digit year, followed by 2-3 digit geologist initials, and a 2-3 digit unique sample number. If more than one sample was collected from the station location, each is assigned a letter (a, b, c, and so forth). Attribute: Attribute_Label: Rock unit/Comments Attribute_Definition: Refers to the geologic uniit from which the sample was collected and/or comments regarding the sample location. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite/Livengood Quadrangle Enumerated_Domain_Value_Definition: sample was Amy Creek Dolomite collected in the Livengood 250:000 Quadrangle Enumerated_Domain_Value_Definition_Source: Alaska Division of Geologica & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Livengood Dome Chert pit/Livengood Quadrangle Enumerated_Domain_Value_Definition: sample was collected from the Livengood Dome Chert pit in the Livengood 250:000 Quadrangle Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Devonian age-Troublesome Creek Unit/Livengood Quadrangle Enumerated_Domain_Value_Definition: sample is Devonian age, collected from Troublesome Creek Unit in the Livengood 250:000 Quadrangle Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Triassic age chert Enumerated_Domain_Value_Definition: sample is Triassic age chert Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Livengood Dome Chert? Enumerated_Domain_Value_Definition: sample may be Livengood Dome Chert Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite? - location approximate Enumerated_Domain_Value_Definition: sample may be Amy Creek Dolomite and the collection location is approximated Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite? Enumerated_Domain_Value_Definition: sample is questionably Amy Creek Dolomite Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite?/Tanana A-1 Quadrangle, S19T5N R14W Enumerated_Domain_Value_Definition: sample may be Amy Creek Dolomite and the location was not identified by GPS device, but was collected from the Tanana A-1 1:63,360 Quadrangle in specified township and range Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Not Amy Creek Dolomite Enumerated_Domain_Value_Definition: Sample was not Amy Creek Dolomite Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite? apatite rich! Enumerated_Domain_Value_Definition: sample is questionably Amy Creek Dolomite, and is apatite-rich Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Not Amy Creek Dolomite or Devonian age unit Enumerated_Domain_Value_Definition: sample is not Amy Creek Dolomite or Devonian in age Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Livengood Dome Chert? Near sample 96SL174? Enumerated_Domain_Value_Definition: Sample may be Livengood Dome Chert and was collected near sample 96SL174 Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Rampart Group Enumerated_Domain_Value_Definition: sample is from the Rampart Group Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Not Livengood Chert Enumerated_Domain_Value_Definition: sample is not Livengood Dome Chert Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Devonian? or Traissic? SW1/4 S19 T5N R13W, Tanana A-1 Quadrangle Enumerated_Domain_Value_Definition: sample may be Devonian or Triassic and was collected from the specified township and range in the Tanana A-1 1:63,360 Quadrangle Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Amy Creek Dolomite? Livengood Dome Chert? Enumerated_Domain_Value_Definition: sample may be Amy Creek Dolomite or Livengood Dome Chert Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: Latitude (dec. degree) Attribute_Definition: Latitude of sample collection measured in decimal degrees Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 65.2542 Range_Domain_Maximum: 65.5333 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude (dec. degrees) Attribute_Definition: Longitude of sample collection measured in decimal degrees Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -138.333 Range_Domain_Maximum: -150.4151728 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Ba Attribute_Definition: Elemental Barium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5 Range_Domain_Maximum: 4938 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Ce Attribute_Definition: Elemental Cesium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 68 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Rb Attribute_Definition: Elemental Rubidium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 82 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Sr Attribute_Definition: Elemental Stronium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 134 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Y Attribute_Definition: Elemental Yttrium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 90 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Zr Attribute_Definition: Elemental Zirconium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 220 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: Cr Attribute_Definition: Elemental Chromium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 173 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: V Attribute_Definition: Elemental Vanadium Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 189 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: La Attribute_Definition: Elemental Lanthanum Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 40 Attribute_Units_of_Measure: parts per million (ppm) Attribute: Attribute_Label: SiO2 Attribute_Definition: Silicon Dioxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 99.1 Range_Domain_Maximum: 75.6 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: TiO2 Attribute_Definition: Titanium Dioxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: .01 Range_Domain_Maximum: .66 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: Al3O3 Attribute_Definition: Aluminum Oxide Attribute_Definition_Source: Alaska Division of Geologica & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: .2 Range_Domain_Maximum: 10.89 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: Fe2O3 Attribute_Definition: Iron Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: .03 Range_Domain_Maximum: 8.49 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: MnO Attribute_Definition: Manganese Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00 Range_Domain_Maximum: .40 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: MgO Attribute_Definition: Magnesium Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: .03 Range_Domain_Maximum: 3.79 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: CaO Attribute_Definition: Calcium Oxide Attribute_Definition_Source: Alaska Divsion of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 7.83 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: Na2O Attribute_Definition: Sodium Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 2.76 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: K2O Attribute_Definition: Potassium Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 2.25 Attribute_Units_of_Measure: weight percent (wt%) Attribute: Attribute_Label: P2O5 Attribute_Definition: Phosphorous Oxide Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0 Range_Domain_Maximum: 6.4 Attribute_Units_of_Measure: weight percent (wt%) Metadata_Reference_Information: Metadata_Date: 20090226 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: Alaska Postal_Code: 99709 Country: United States Contact_Voice_Telephone: (907) 451-5010 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998