Major-oxide and trace-element geochemical data from rocks collected in 2010 in the Tyonek Quadrangle, Alaska

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Freeman, L.K., Gillis, R.J., Elliott, B.A., and Wypych, Alicja, 2016, Major-oxide and trace-element geochemical data from rocks collected in 2010 in the Tyonek Quadrangle, Alaska: Raw Data File RDF 2016-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/29651>

   Other_Citation_Details: 2 p.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -152.251156

   East_Bounding_Coordinate: -151.399486

   North_Bounding_Coordinate: 61.343356

   South_Bounding_Coordinate: 61.007156

3. What does it look like?

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 2010

   Ending_Date: 2016

   Currentness_Reference: publication date

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: report and digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a point data set.

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .000001. Longitudes are given to the nearest .000001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.
      

7. How does the data set describe geographic features?

   rdf2016-5-border.shp

   Outline of the study area. (Source: Alaska Division of Geological & Geophysical Surveys)

   rdf2016-5-rock-major-oxide-trace-element.csv, rdf2016-5-rock-major-oxide-trace-element-limits.csv

   Major- and minor-oxide and trace-element analysis of rock samples. (Source: Alaska Division of Geological & Geophysical Surveys)

   SAMPLE

   Label assigned to identify the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

   Generic example of a sample identifier: YYAAA9999X: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database.

   BATCH_NUMBER

   Number provided by the laboratory to identify the samples and analyses included in the work order. (Source: ALS Minerals)

   FA11083196

   LONGITUDE

   Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	-152.221411
   Maximum:	-151.429439
   Units:	decimal degrees

   LATITUDE

   Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	61.021598
   Maximum:	61.328914
   Units:	decimal degrees

   SAMPLE_MATERIAL

   Type of material that was sent to the lab for processing. (Source: Alaska Division of Geological & Geophysical Surveys)

   rock

   COLLECTOR

   The geologist who collected the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

   The samples presented in this report were collected by: Brent Elliott, and Larry Freeman

   DESCRIPTION

   Description of the sample (Source: Alaska Division of Geological & Geophysical Surveys)

   Characters 1 to 254 of a brief sample or station description.

   DESCRIP_2

   Extension of the sample or station description for descriptions which are greater than 254 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	The descriptive text is shorter than 254 characters.

   Characters greater than 254 of the sample or station description.

   WEIGHT_KG

   Sample weight (as received by the lab) in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Minerals)

   Range of values
   Minimum:	0.45
   Maximum:	5.55
   Units:	kilograms

   As_ppm_ME-XRF05

   Arsenic values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 5 parts per million; Upper detection limit = 5000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	5
   Maximum:	22
   Units:	parts per million

   Ba_ppm_ME-XRF05

   Barium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	170
   Maximum:	2700
   Units:	parts per million

   Bi_ppm_ME-XRF05

   Bismuth values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	5
   Maximum:	8
   Units:	parts per million

   Ce_ppm_ME-XRF05

   Cerium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	80
   Units:	parts per million

   Cr_ppm_ME-XRF05

   Chromium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	5
   Maximum:	208
   Units:	parts per million

   Cu_ppm_ME-XRF05

   Copper values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	290
   Units:	parts per million

   Ga_ppm_ME-XRF05

   Gallium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	16
   Maximum:	24
   Units:	parts per million

   La_ppm_ME-XRF05

   Lanthanum values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	30
   Units:	parts per million

   Mo_ppm_ME-XRF05

   Molybdenum values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	4
   Maximum:	4
   Units:	parts per million

   Nb_ppm_ME-XRF05

   Niobium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	2
   Maximum:	23
   Units:	parts per million

   Ni_ppm_ME-XRF05

   Nickel values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	120
   Units:	parts per million

   Pb_ppm_ME-XRF05

   Lead values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	7
   Maximum:	23
   Units:	parts per million

   Rb_ppm_ME-XRF05

   Rubidium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	7
   Maximum:	166
   Units:	parts per million

   Sb_ppm_ME-XRF05

   Antimony values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Se_ppm_ME-XRF05

   Selenium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	2
   Maximum:	2
   Units:	parts per million

   Sn_ppm_ME-XRF05

   Tin values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Sr_ppm_ME-XRF05

   Strontium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	53
   Maximum:	1965
   Units:	parts per million

   Ta_ppm_ME-XRF05

   Tantalum values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Th_ppm_ME-XRF05

   Thorium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	7
   Maximum:	39
   Units:	parts per million

   Ti_ppm_ME-XRF05

   Titanium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	319
   Maximum:	>10000
   Units:	parts per million

   U_ppm_ME-XRF05

   Uranium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 4 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	4
   Maximum:	9
   Units:	parts per million

   W_ppm_ME-XRF05

   Tungsten values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	10
   Units:	parts per million

   Y_ppm_ME-XRF05

   Yttrium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	6
   Maximum:	47
   Units:	parts per million

   Zr_ppm_ME-XRF05

   Zirconium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	46
   Maximum:	279
   Units:	parts per million

   Zn_ppm_ME-XRF05

   Zinc values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	10
   Maximum:	140
   Units:	parts per million

   V_ppm_ME-XRF05

   Vanadium values measured in parts per million; Method: X-Ray Fluorescence (XRF), Pressed Pellet; Lower detection limit = 10 parts per million; Upper detection limit = parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	20
   Maximum:	570
   Units:	parts per million

   SiO2_pct_ME-XRF06

   Silicon dioxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	44.37
   Maximum:	75.33
   Units:	percent

   Al2O3_pct_ME-XRF06

   Aluminum oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	11.72
   Maximum:	19.26
   Units:	percent

   Fe2O3_pct_ME-XRF06

   Iron oxide (+3) values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	1.28
   Maximum:	16.97
   Units:	percent

   CaO_pct_ME-XRF06

   Calcium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.56
   Maximum:	13.68
   Units:	percent

   MgO_pct_ME-XRF06

   Magnesium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.18
   Maximum:	8.25
   Units:	percent

   Na2O_pct_ME-XRF06

   Sodium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	1.52
   Maximum:	4.64
   Units:	percent

   K2O_pct_ME-XRF06

   Potassium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.44
   Maximum:	8.54
   Units:	percent

   Cr2O3_pct_ME-XRF06

   Chromium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.04
   Units:	percent

   TiO2_pct_ME-XRF06

   Titanium dioxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.07
   Maximum:	3.7
   Units:	percent

   MnO_pct_ME-XRF06

   Manganese oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.03
   Maximum:	0.24
   Units:	percent

   P2O5_pct_ME-XRF06

   Phosphorus oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.005
   Maximum:	0.805
   Units:	percent

   SrO_pct_ME-XRF06

   Strontium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.01
   Maximum:	0.18
   Units:	percent

   BaO_pct_ME-XRF06

   Barium oxide values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.01
   Maximum:	0.31
   Units:	percent

   LOI_pct_ME-XRF06

   Loss on Ignition values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 100 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	0.19
   Maximum:	4.79
   Units:	percent

   Total_pct_ME-XRF06

   Total values measured in percent; Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 percent; Upper detection limit = 101 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Range of values
   Minimum:	98.08
   Maximum:	99.9
   Units:	percent

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Freeman, L.K.
   • Gillis, R.J.
   • Elliott, B.A.
   • Wypych, Alicja

2. Who also contributed to the data set?

   Primary funding for the Tyonek work was provided by the State of Alaska. Geologic mapping during the 2010 field season was supported by the U.S. Geological Survey's National Cooperative Geologic Mapping Program (STATEMAP award number: G10AC00321).

3. To whom should users address questions about the data?
   Alaska Division of Geological & Geophysical Surveys
   GIS Manager
   3354 College Road
   Fairbanks, AK 99709-3707
   USA
   

   (907)451-5020 (voice)
   dggsgis@alaska.gov
   

   Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

To better understand the petroleum system and the geologic relationships between the exhumed arc intrusive rocks and adjacent Cenozoic stratigraphy of the Cook Inlet forearc basin, during the summer of 2010 the Alaska Division of Geological & Geophysical Surveys conducted a federally-funded geologic field mapping project. As a part of this project DGGS collected 44 rock samples for geochemical analyses from Late Cretaceous and Paleogene intrusive and volcanic lithologies that compose part of the Alaska-Aleutian Range batholith and arc. Major-oxide, minor-oxide, and trace-element geochemical data presented here provide new information about the genesis and potential mineralization of igneous rocks in the western Neacola and southern Tordrillo mountains.

How was the data set created?

1. From what previous works were the data drawn?

2. How were the data generated, processed, and modified?

   Date: 2010 (process 1 of 3)

   Sample selection - Igneous rocks showing little alteration or weathering were collected for whole-rock major-oxide, minor-oxide, and trace-element analyses to aid in classification and study of petrogenesis and tectonic setting. Most samples are 'grab'' samples, which were collected for their overall representation of the outcrop.

   Date: 2010 (process 2 of 3)

   Sample preparation - Rock samples were processed by ALS Minerals using their CRU-31, SPL-21, and PUL-31 methods. The samples were crushed to better than 70 percent passing 2 mm, and a 250 g split was pulverized to better than 85 percent passing 75 microns. Prior to crushing, samples for whole-rock analysis were trimmed by DGGS staff to remove weathered surfaces.

   Date: 2011 (process 3 of 3)

   Whole-rock geochemistry - Samples were analyzed for a variety of suites of major and trace elements depending on the sample type. In addition to relying on ALS Minerals' accredited (ISO/IEC 17025-2005) internal quality-control program, DGGS monitored analysis quality with one standard reference material per batch of 20 analyses. For whole-rock geochemistry samples, major and minor oxides were analyzed using lithium metaborate fusion digestion and XRF (ALS Minerals method ME-XRF06). Trace elements were determined using XRF on powder pellets (ALS Minerals method ME-XRF05).

3. What similar or related data should the user be aware of?

   Herriott, T.M., Nye, C.J., Reger, R.D., Wartes, M.A., LePain, D.L., and Gillis, R.J., 2014, Geologic context, age constraints, and sedimentology of a Pleistocene volcaniclastic succession near Mount Spurr volcano, south-central Alaska: Report of Investigation RI 2014-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27261>

   Other_Citation_Details: 35 p

   Solie, D.N., Werdon, M.B., Nye, C.J., and Combellick, R.A., 1993, Land selection unit 6 (Tyonek Quadrangle): References, DGGS sample locations, geochemical and major oxide data: Public Data File PDF 93-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/1555>

   Other_Citation_Details: 11 p

   Solie, D.N., Werdon, M.B., Nye, C.J., and Combellick, R.A., 1993, Land selection unit 7 (Tyonek and Kenai quadrangles): References, DGGS sample location, geochemical and major oxide data: Public Data File PDF 93-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/1556>

   Other_Citation_Details: 11 p

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   Coordinates of sample locations were determined by the geologists in the field using using hand-held GPS devices. Sample numbers were recorded in the field on sample bags and on field note sheets. The sample location tables were plotted in GIS software to visually verify location accuracy and cross checked for consistency against the sample numbers recorded on the bags. In addition to ALS Minerals' accredited (ISO/IEC 17025-2005) internal quality-control program, DGGS monitored analysis quality with one standard reference material per batch. Lab results were examined by the DGGS geologists to ensure that they are reasonable given the geologic context of the sample.

2. How accurate are the geographic locations?

   Location data were collected with handheld GPS devices, with location accuracy error typically less than 10 meters.

3. How accurate are the heights or depths?

4. Where are the gaps in the data? What is missing?

   This data release is complete. The data tables have been lightly edited for clarity, but are generally provided as received from the lab.

5. How consistent are the relationships among the observations, including topology?

   not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

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).

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.

1. Who distributes the data set? (Distributor 1 of 1)
   Alaska Division of Geological & Geophysical Surveys
   3354 College Road
   Fairbanks, AK 99709-3707
   USA
   

   (907)451-5020 (voice)
   (907)451-5050 (FAX)
   dggspubs@alaska.gov
   

   Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

   Contact_Instructions:

   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.

2. What's the catalog number I need to order this data set?

   RDF 2016-5

3. What legal disclaimers am I supposed to read?

   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.

4. How can I download or order the data?
   • Availability in non-digital form:

     DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.

   • Cost to order the data: Contact DGGS for current pricing

   • Availability in digital form:

     Data format:	ASCII tabular files
     Network links:	<http://dx.doi.org/10.14509/29651>

   • Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 01-Apr-2016

Metadata author:

Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

Metadata standard:

FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

• <http://www.dggs.alaska.gov/metadata/dggs.ext>