Whole Rock Geochemical Data For Paleozoic Sedimentary Rocks of the western Brooks Brooks Range, Alaska

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: John F. Slack

Originator: Jeanine M. Schmidt

Originator: Julie A. Dumoulin

Publication_Date: 2004

Title:

Whole Rock Geochemical Data For Paleozoic Sedimentary Rocks of the western Brooks Brooks Range, Alaska

Geospatial_Data_Presentation_Form: table

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report

Issue_Identification: 2004-1371

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <http://pubs.usgs.gov/of/2004/1371/>

Description:

Abstract:

This report presents geochemical analyses for 210 unaltered and unmineralized rock samples of Paleozoic age in the western Brooks Range of northern Alaska. These data form the basis for a study by Slack et al. (2004a) on the provenance and depositional history of the Paleozoic strata, and on their metallogenic significance relative to the formation of large stratabound Zn- Pb-Ag deposits in the Red Dog mining district. Principal rock types that were analyzed include shale, siltstone, sandstone, chert, bedded siliceous rock, and calcareous radiolarite; selected samples of limestone, phosphate, and argillite, and one siderite concretion, were also analyzed. Note that the phosphate samples are from the central Brooks Range, east of the Red Dog district. The geochemical analyses are presented here in Microsoft Excel and .dbf spreadsheet formats in order to facilitate calculations and plotting of data. A related geochemical database on altered and mineralized rocks in the Red Dog Zn-Pb-Ag district is available in Slack and others (2004b).

Purpose:

These data form the basis for a study by Slack et al. (2004a) on the provenance and depositional history of the Paleozoic strata, and on their metallogenic significance relative to the formation of large stratabound Zn-Pb-Ag deposits in the Red Dog mining district.

Supplemental_Information:

Data for elements, oxides, and other components are presented either in weight percent or parts per million, except for Au and Pd that are in parts per billion. Qualified values (shown by the '<' symbol) represent values less than the specified minimum detection limit (MDL). In some cases, the MDL for a particular element or component is not uniform, which reflects changing analytical conditions or matrix effects, or use of newer ICP-MS instruments that have higher precision and lower MDLs. For statistical treatment of data and other calculations, it is recommended that qualified values be substituted by one-half the analytical detection limit (Sanford and others, 1993). Note that the abbreviation "n.a." refers to a lack of analysis for the specified element or component.

Values for the magnitude of the Ce and Eu anomalies are also presented. The magnitude of the Ce anomaly, Ce/Ce*, is calculated as: Ce[CN]/((La[CN])**0.667 * (Nd[CN])**0.333) where Ce[CN], La[CN], and Nd[CN] represent normalization of Ce, La, and Nd respectively to average chondrites using the data of Nakamura (1974). The magnitude of the Eu anomaly, Eu/Eu*, is calculated as: Eu[CN]/(Sm[CN]*Gd[CN])**0.5 with chondrite normalization of Eu, Sm, and Gd represented respectively as Eu[CN], Sm[CN], and Gd[CN]. For those samples without ICP-MS analyses for Gd, the Eu/Eu* values were calculated by a curve-fitting Excel macro program using INAA data for La, Ce, Nd, Sm, Eu, Tb, Yb, and Lu.

In these formulae, two asterisks (**) are used to represent exponentiation; one alone indicates multiplication.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2004

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -163.899950

East_Bounding_Coordinate: -151.864400

North_Bounding_Coordinate: 68.634480

South_Bounding_Coordinate: 63.381070

Keywords:

Theme:

Theme_Keyword_Thesaurus: Gateway to the Earth version 1.0

Theme_Keyword: geochemistry

Theme_Keyword: rocks and deposits

Theme_Keyword: mass spectroscopy

Theme_Keyword: neutron activation analysis

Theme_Keyword: atomic absorption analysis

Theme_Keyword: chemical analysis

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0

Place_Keyword: 02188 = Northwest Arctic

Stratum:

Stratum_Keyword_Thesaurus: none

Stratum_Keyword: Kuna Formation

Stratum_Keyword: Lower Siksikpuk Formation

Stratum_Keyword: Noatak Sandstone

Access_Constraints: none

Use_Constraints: none

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: John F Slack

Contact_Organization: USGS ER GD

Contact_Address:

Address_Type: mailing address

Address:

Mail Stop 954 USGS National Center
12201 Sunrise Valley Drive

City: Reston

State_or_Province: VA

Postal_Code: 20192-0002

Country: USA

Contact_Voice_Telephone: 703-648-6337

Contact_Facsimile_Telephone: 703-648-6383

Contact_Electronic_Mail_Address: jfslack@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2004/1371/reddog.png>

Browse_Graphic_File_Description:

Index map showing general location of the study area, 790x570 pixels, 53k bytes

Browse_Graphic_File_Type: PNG

Data_Set_Credit:

I.L. Tailleur and J.M. Kurtak donated phosphorite samples for analysis.

Native_Data_Set_Environment: Microsoft Excel

Cross_Reference:

Citation_Information:

Originator: John F. Slack

Originator: Karen D. Kelley

Originator: Jeffrey L. Clark

Publication_Date: 2004

Title:

Whole rock geochemical data for altered and mineralized rocks, Red Dog Zn-Pb-Ag district, western Brooks Range, Alaska

Geospatial_Data_Presentation_Form: table

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report

Issue_Identification: 2004-1372

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: <http://pubs.usgs.gov/of/2004/1372/>

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Precision and accuracy for concentrations 100x the minimum detection limit (MDL) was generally better than ±5 % relative, and in many cases such as for major elements was better than ±1 % relative. For concentrations approximately 10x the MDL, precision and accuracy were about ±10-20 % relative depending on the method used.

Logical_Consistency_Report:

Multiple standards were analyzed together with the submitted rock samples. Analyses by ACT Labs included data on 8 to 10 compositionally different standards with well-defined elemental concentrations. In addition to these standards, analyses were routinely obtained on duplicate samples and Ohio black shale SDO-1 (<http://minerals.cr.usgs.gov/geochem/ohioshale.html>).

Completeness_Report:

Data are available for most elements in most samples. The code "n.a." is used to indicate an unavailable analysis; it occurs in only 21 fields:

Database
field                  Percent   Chemical
label     # missing    missing   species
-----------------------------------------
LOI          65          30%      (loss on ignition)
F            50          23%      F
TOTAL_C       3           1%      (total carbon)
CO2          31          14%      (carbon dioxide)
CORG         31          14%      (organic carbon)
S            30          14%      S
SO4          63          30%      (sulfate)
PR           66          31%      Pr
GD           66          31%      Gd
DY           66          31%      Dy
HO           66          31%      Ho
ER           66          31%      Er
TM           66          31%      Tm
CD          110          52%      Cd
AU           23          10%      Au
GE           65          30%      Ge
TL           66          31%      Tl
SE           23          10%      Se
W            66          31%      W
LI          103          49%      Li
PD          121          57%      Pd

Lineage:

Process_Step:

Process_Description:

Geochemical analyses were obtained mostly on samples from natural outcrops; some samples are of diamond drill core 3.5 or 4.5 cm in diameter. Samples were cut using water-cooled diamond saws in order to remove oxidized and(or) weathered surfaces. A small number of samples contain veins composed of quartz with or without associated carbonate and sulfides; these veins were also cut out before analysis. All samples were pulverized in an alumina ceramic mortar, which in some cases may have produced very minor contamination by trace amounts of Al, Ba, and(or) rare earth elements (REE).

Prior to analysis all samples were fused with lithium metaborate/ tetraborate to insure nearly complete acid digestion of resistate minerals such as zircon, monazite, rutile, chromite, and barite. Most samples were analyzed by Activation Laboratories (ACT Labs) in Ancaster, Ontario, using methods described on their web site: www. actlabs.com. Major elements, most trace elements, and REE were determined by inductively-coupled plasma mass spectrometry (ICP-MS), using an approach similar to that of Jenner and others (1990). REE in some barite samples were analyzed by high-resolution, magnetic sector ICP-MS using an ion exchange technique in order to eliminate Ba interference on Eu. Volatiles and related components (total C, CO2, Corg, S, SO4) were determined using conventional methods as described in Jackson and others (1987). Fluorine was analyzed by the ion selective electrode technique (Jackson and others, 1987). Data for Sc, Cr, Co, Au, Sb, As, and Se in most samples were obtained by instrumental neutron activation analysis (INAA) (Hoffman, 1992), which provides more precise results than by ICP-MS. Au concentrations in most samples of semimassive and massive sulfide were also obtained by flame atomic absorption (Aruscavage and Crock, 1987) by XRAL Laboratories of Denver, CO, using on splits of the same rock powders that were earlier run for major and trace elements, and REE.

A smaller group of samples was analyzed by the U.S. Geological Survey in laboratories at Denver, Colorado, Reston, Virginia, and Menlo Park, California. Major elements were determined by X-ray fluorescence using the methods of Taggart and others ( 1987). Concentrations of volatiles and fluorine were determined by the same procedures as outlined above, except that separate determinations of organic carbon were not made. Where data for CO2 are available, organic carbon contents were calculated by percent difference using results for total carbon. Minor elements were analyzed by inductively coupled plasma-atomic emission spectometry (Lichte and others, 1987), except for Rb, Cs, Ba, Zr, Hf, Ta, Th, U, Sc, Cr, Co, Ni, Mo, Zn, Au, Sb, and As and REE (La, Ce, Nd, Sm, Eu, Tb, Yb, Lu) that were determined by INAA (Baedecker and McKown, 1987).

Process_Date: 2004

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Point

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

Point_and_Vector_Object_Count: 210

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution:

Longitude_Resolution:

Geographic_Coordinate_Units: decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: brooks.dbf

Entity_Type_Definition: Samples for which geochemical analyses have been conducted

Attribute:

Attribute_Label: SAMPLE_NO

Attribute_Definition: Sample number

Attribute_Domain_Values:

Unrepresentable_Domain: Textual identifier without further scientific significance

Attribute:

Attribute_Label: STRATIGRAP

Attribute_Definition: Stratigraphic unit sampled

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Hunt Fork Shale

Enumerated_Domain:

Enumerated_Domain_Value: Kanayut Conglomerate

Enumerated_Domain:

Enumerated_Domain_Value: Kayak Shale

Enumerated_Domain:

Enumerated_Domain_Value: Kuna Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kuna Formation (Kivalina unit)

Enumerated_Domain:

Enumerated_Domain_Value: Lisburne Group (drowned shelf facies)

Enumerated_Domain:

Enumerated_Domain_Value: Lisburne Group (shelf facies)

Enumerated_Domain:

Enumerated_Domain_Value: Lisburne Group (Zebra Creek facies)

Enumerated_Domain:

Enumerated_Domain_Value: Noatak Sandstone

Enumerated_Domain:

Enumerated_Domain_Value: Siksikpuk Formation

Attribute:

Attribute_Label: SAMPLE_DES

Attribute_Definition: Description of the sample

Attribute_Domain_Values:

Unrepresentable_Domain: Plain descriptive text

Attribute:

Attribute_Label: SAMPLE_TYP

Attribute_Definition: Type of sampled material

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Drill core

Enumerated_Domain:

Enumerated_Domain_Value: Outcrop

Attribute:

Attribute_Label: LATITUDE

Attribute_Definition: Latitude in decimal degrees

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 63.38107

Range_Domain_Maximum: 68.63448

Attribute:

Attribute_Label: LONGITUDE

Attribute_Definition: Longitude in decimal degrees

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -163.89995

Range_Domain_Maximum: -151.8644

Attribute:

Attribute_Label: ANALYTICAL

Attribute_Definition: Name of the organization whose laboratory provided the analysis

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Activation Laboratories

Enumerated_Domain_Value_Definition:

Enumerated_Domain:

Enumerated_Domain_Value: U.S. Geological Survey

Enumerated_Domain_Value_Definition:

Attribute:

Attribute_Label: SIO2

Attribute_Definition: Silica as SiO2 in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5.42

Range_Domain_Maximum: 97.63

Attribute:

Attribute_Label: TIO2

Attribute_Definition: Titanium Oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.009

Range_Domain_Maximum: 1.18

Attribute:

Attribute_Label: AL2O3

Attribute_Definition: Aluminum oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.16

Range_Domain_Maximum: 23.6

Attribute:

Attribute_Label: FE2O3

Attribute_Definition: Iron oxide in percent by weight (total iron reported as Fe2O3)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.07

Range_Domain_Maximum: 45.8

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: MNO

Attribute_Definition: Manganese oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 1.016

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: MGO

Attribute_Definition: Magnesium oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 15.11

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: CAO

Attribute_Definition: Calcium oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 51.09

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: NA2O

Attribute_Definition: Sodium oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 1.97

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: K2O

Attribute_Definition: Potassium oxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.06

Range_Domain_Maximum: 4.28

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: P2O5

Attribute_Definition: Phosphate as P2O5 in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 30.91

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: LOI

Attribute_Definition: Loss on ignition in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 39.04

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: TOTAL

Attribute_Definition: Total of major element analysis, including LOI

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 57.06

Range_Domain_Maximum: 99.77

Attribute_Units_of_Measure: percent by weight

Attribute:

Attribute_Label: F

Attribute_Definition: Fluorine (F) in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.005

Range_Domain_Maximum: 6.43

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: TOTAL_C

Attribute_Definition: Total carbon in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 23.2

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: CO2

Attribute_Definition: Carbon dioxide in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 38

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: CORG

Attribute_Definition: Organic carbon in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 22.38

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: S

Attribute_Definition: Sulfur (S) in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 4.06

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: SO4

Attribute_Definition: Sulfate (SO4) in percent by weight

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.05

Range_Domain_Maximum: 4.55

Attribute_Units_of_Measure: percent by weight

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: RB

Attribute_Definition: Rubidium (Rb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 256

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CS

Attribute_Definition: Cesium (Cs) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 53.6

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: SR

Attribute_Definition: Strontium (Sr) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 9

Range_Domain_Maximum: 1900

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: BA

Attribute_Definition: Barium (Ba) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 39

Range_Domain_Maximum: 39500

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Y

Attribute_Definition: Yttrium (Y) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.5

Range_Domain_Maximum: 339.8

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: LA

Attribute_Definition: Lanthanum (La) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.61

Range_Domain_Maximum: 170.09

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CE

Attribute_Definition: Cerium (Ce) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.46

Range_Domain_Maximum: 165

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: PR

Attribute_Definition: Praseodymium (Pr) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.38

Range_Domain_Maximum: 30.79

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: ND

Attribute_Definition: Neodymium (Nd) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.47

Range_Domain_Maximum: 133.15

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: SM

Attribute_Definition: Samarium (Sm) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.25

Range_Domain_Maximum: 39.9

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: EU

Attribute_Definition: Europium (Eu) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.028

Range_Domain_Maximum: 9.78

Attribute_Units_of_Measure: ppm (parts per million by weight)

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Attribute:

Attribute_Label: GD

Attribute_Definition: Gadolinium (Gd) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.24

Range_Domain_Maximum: 30.01

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: TB

Attribute_Definition: Terbium (Tb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.03

Range_Domain_Maximum: 5.98

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: DY

Attribute_Definition: Dysprosium (Dy) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.22

Range_Domain_Maximum: 31.58

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: HO

Attribute_Definition: Holmium (Ho) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.05

Range_Domain_Maximum: 6.81

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: ER

Attribute_Definition: Erbium (Er) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.18

Range_Domain_Maximum: 23.74

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: TM

Attribute_Definition: Thulium (Tm) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.03

Range_Domain_Maximum: 4.118

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: YB

Attribute_Definition: Ytterbium (Yb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.13

Range_Domain_Maximum: 25

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: LU

Attribute_Definition: Lutetium (Lu) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.02

Range_Domain_Maximum: 4.222

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CE_CE

Attribute_Definition:

Cerium anomaly (dimensionless). The magnitude of the Ce anomaly, Ce/Ce*, is calculated as: Ce[CN]/((La[CN])**0.667 * (Nd[CN])**0.333) where Ce[CN], La[CN], and Nd[CN] represent normalization of Ce, La, and Nd respectively to average chondrites using the data of Nakamura (1974). Here two asterisks (**) are used to represent exponentiation; one alone indicates multiplication.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.0877

Range_Domain_Maximum: 1.3357

Attribute_Units_of_Measure: (ratio, no units)

Attribute:

Attribute_Label: EU_EU

Attribute_Definition:

Europium anomaly (dimensionless). The magnitude of the Eu anomaly, Eu/Eu*, is calculated as: Eu[CN]/(Sm[CN]*Gd[CN])**0.5 with chondrite normalization of Eu, Sm, and Gd represented respectively as Eu[CN], Sm[CN], and Gd[CN]. Here two asterisks (**) are used to represent exponentiation; one alone indicates multiplication.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.2138

Range_Domain_Maximum: 0.9055

Attribute_Units_of_Measure: (ratio, no units)

Attribute:

Attribute_Label: ZR

Attribute_Definition: Zirconium (Zr) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 5

Range_Domain_Maximum: 621

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: HF

Attribute_Definition: Hafnium (Hf) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 14.8

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: NB

Attribute_Definition: Niobium (Nb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 20.5

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: TA

Attribute_Definition: Tantalum (Ta) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.01

Range_Domain_Maximum: 1.9

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: TH

Attribute_Definition: Thorium (Th) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.22

Range_Domain_Maximum: 21.78

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: U

Attribute_Definition: Uranium (U) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.58

Range_Domain_Maximum: 162.12

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: V

Attribute_Definition: Vanadium (V) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 15

Range_Domain_Maximum: 1720

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: SC

Attribute_Definition: Scandium (Sc) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.5

Range_Domain_Maximum: 27.1

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CR

Attribute_Definition: Chromium (Cr) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 8

Range_Domain_Maximum: 1690

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CO

Attribute_Definition: Cobalt (Co) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 49

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: NI

Attribute_Definition: Nickel (Ni) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 8

Range_Domain_Maximum: 621

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: MO

Attribute_Definition: Molybdenum (Mo) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2

Range_Domain_Maximum: 88

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CU

Attribute_Definition: Copper (Cu) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 7

Range_Domain_Maximum: 590

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: ZN

Attribute_Definition: Zinc (Zn) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 4

Range_Domain_Maximum: 1300

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: CD

Attribute_Definition: Cadmium (Cd) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.3

Range_Domain_Maximum: 100

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: PB

Attribute_Definition: Lead (Pb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2

Range_Domain_Maximum: 180

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: AG

Attribute_Definition: Silver (Ag) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 32.1

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: AU

Attribute_Definition: Gold (Au) in ppb (parts per billion by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2

Range_Domain_Maximum: 34

Attribute_Units_of_Measure: ppb (parts per billion by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: GA

Attribute_Definition: Gallium (Ga) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 33

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: GE

Attribute_Definition: Germanium (Ge) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 4.99

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: TL

Attribute_Definition: Thallium (Tl) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.03

Range_Domain_Maximum: 1.84

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: SB

Attribute_Definition: Antimony (Sb) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.1

Range_Domain_Maximum: 19

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: AS

Attribute_Definition: Arsenic (As) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.5

Range_Domain_Maximum: 68.2

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: BI

Attribute_Definition: Bismuth (Bi) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.08

Range_Domain_Maximum: 3.4

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: SE

Attribute_Definition: Selenium (Se) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 44

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: SN

Attribute_Definition: Tin (Sn) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 7

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: W

Attribute_Definition: Tungsten (W) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.5

Range_Domain_Maximum: 16.1

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: BE

Attribute_Definition: Beryllium (Be) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 3

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute:

Attribute_Label: LI

Attribute_Definition: Lithium (Li) in ppm (parts per million by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3

Range_Domain_Maximum: 200

Attribute_Units_of_Measure: ppm (parts per million by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Attribute:

Attribute_Label: PD

Attribute_Definition: Palladium (Pd) in ppb (parts per billion by weight)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.5

Range_Domain_Maximum: 36

Attribute_Units_of_Measure: ppb (parts per billion by weight)

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n.a.

Enumerated_Domain_Value_Definition: no analytic result available

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USGS Information Services

Contact_Address:

Address_Type: mailing address

Address: Box 25286 Denver Federal Center

City: Denver

State_or_Province: CO

Postal_Code: 80225

Country: USA

Contact_Voice_Telephone: 1-888-ASK-USGS

Contact_Facsimile_Telephone: 303-202-4693

Contact_Electronic_Mail_Address: ask@usgs.gov

Resource_Description: USGS Open-File Report 2004-1371

Distribution_Liability:

Although all data published in these grids have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: Shapefile

Format_Version_Number: 1.0

Format_Information_Content: Sample point locations and geochemical analyses

File_Decompression_Technique: unzip

Transfer_Size: 34 kilobytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/2004/1371/gisdata.zip>

Digital_Form:

Digital_Transfer_Information:

Format_Name: Microsoft Excel

Format_Version_Number: 97

Format_Information_Content: Sample point locations and geochemical analyses

File_Decompression_Technique: none

Transfer_Size: 185 kilobytes

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <http://pubs.usgs.gov/of/2004/1371/brooks.xls>

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20041021

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Peter N. Schweitzer

Contact_Address:

Address_Type: mailing address

Address:

Mail Stop 954 National Center
U.S. Geological Survey
12201 Sunrise Valley Drive

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: (703) 648-6533

Contact_Facsimile_Telephone: (703) 648-6560

Contact_Electronic_Mail_Address: <pschweitzer@usgs.gov>

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998