Identification_Information:  
	Citation:  
		Citation_Information:  
			Originator:  Peter E. Bittenbender, Kirby W. Bean, Jeff L. Borhauer, Edward G. Gensler
			Publication_Date:  2003
			Title:  Delta River Mining District--Data Release, 2003
			Publication_Information:  
				Publication_Place:  Anchorage, AK
				Publisher:  U.S. Bureau of Land Management
	Description:  
		Abstract:  This release contains a compilation of all samples collected by the BLM during 2001, 2002, and 2003 of the Delta River Mining District study.  These data represent sample location and assay results for 960 rock, soil, stream sediment, pan concentrate, and placer samples. The analyses were performed by commercial laboratories contracted by the BLM.
		Purpose:  The objective of the Delta River Mining District investigation is to evaluate
			the mineral resources and mineral development potential of the district.
			The geochemical dataset is the compilation of the analytical results for the Delta
			River Mining District study through September 2003.
		Supplemental_Information:  Samples were collected during the field seasons of 2001 through 2003
	Time_Period_of_Content:  
		Time_Period_Information:  
			Single_Date/Time:  
				Calendar_Date:  2003
		Currentness_Reference:  publication date
	Status:  
		Progress:  In Work
		Maintenance_and_Update_Frequency:  As needed
	Spatial_Domain:  
		Bounding_Coordinates:  
			West_Bounding_Coordinate:  -147
			East_Bounding_Coordinate:  144
			North_Bounding_Coordinate:  65
			South_Bounding_Coordinate:  62
	Keywords:  
		Theme:  
			Theme_Keyword_Thesaurus:  Report
			Theme_Keyword:  minerals
			Theme_Keyword:  mining district study
			Theme_Keyword:  geochemical database
			Theme_Keyword:  geochemistry
			Theme_Keyword:  mineral assessment
			Theme_Keyword:  central Alaska
		Theme:  
			Theme_Keyword_Thesaurus:  BLM-THEME
			Theme_Keyword:  Minerals
		Place:  
			Place_Keyword_Thesaurus:  Location
			Place_Keyword:  Alaska
			Place_Keyword:  Central
			Place_Keyword:  Delta River
			Place_Keyword:  Interior
		Place:  
			Place_Keyword_Thesaurus:  BLM-STATE
			Place_Keyword:  Alaska
		Temporal:  
			Temporal_Keyword_Thesaurus:  None
			Temporal_Keyword:  2001
			Temporal_Keyword:  2002
			Temporal_Keyword:  2003
	Access_Constraints:  Discretionary, contains no sensitive information - generally considered releasable.
	Use_Constraints:  Any hardcopies or published datasets using these data should clearly
		indicate their source. Any users wishing to modify the data are obligated
		to describe the types of modifications they have performed. User
		specifically agrees not to misrepresent the data, nor to imply that changes
		were approved or endorsed by the BLM.  Any discrepancies or errors in this data should be reported to Earle_Williams@ak.blm.gov
	Point_of_Contact:  
		Contact_Information:  
			Contact_Person_Primary:  
				Contact_Person:  Earle Williams
				Contact_Organization:  U.S. Bureau of Land Management
			Contact_Position:  Program Manager
			Contact_Address:  
				Address_Type:  mailing and physical address
				Address:  2222 W 7th Ave Ste 13
				City:  Anchorage
				State_or_Province:  Alaska
				Postal_Code:  99513
				Country:  U.S.A.
			Contact_Voice_Telephone:  907-271-5762
			Contact_Electronic_Mail_Address:  Earle_Williams@ak.blm.gov
			Hours_of_Service:  0800-1630
	Native_Data_Set_Environment:  Microsoft Access database
	Cross_Reference:  
		Citation_Information:  
			Originator:  Peter E. Bittenbender, Kirby W. Bean, and Edward G. Gensler
			Publication_Date:  2003
			Title:  Mineral Investigations in the Delta River Mining District, East-Central Alaska 2001-2002
			Geospatial_Data_Presentation_Form:  map
			Series_Information:  
				Series_Name:  Open-File Report
				Issue_Identification:  91
			Publication_Information:  
				Publication_Place:  Anchorage, AK
				Publisher:  U.S. Bureau of Land Management
Data_Quality_Information:  
	Attribute_Accuracy:  
		Attribute_Accuracy_Report:  The samples in the dataset were analyzed by a variety of techniques. The
			accuracy and detection limits vary with each element and each method. When
			appropriate, qualifiers are given to the data.  Not all sample analyses that resulted in values above the upper detection limit for
			a given analysis were re-analyzed by alternative test methods.  Occasionally the
			sample did not have sufficient volume for re-analysis or the sample collector decided
			further analyses were not necessary.
	Completeness_Report:  This dataset provides chemical data for Au, Ag, Al, As, B, Ba, Bi, Ca, Cd, Ce, Co, Cr, Cu, Eu, Fe, Ga, Hg, Ho, Ir, K, La, Li, Mg, Mn, Mo, Na, Nb, Ni, Os, P, Pb, Pd, Pt, Re, Rh, Ru, S, Sb, Sc, Sn, Sr, Ta, Te, Th, Ti, Tl, U, V,  W, Y,  Yb, Zn, and, Zr.  Not all samples contain results for every element. The sample submitter may have elected not to analyze for certain elements due to the geology of the sample area. Also, some samples were of limited volume.
	Positional_Accuracy:  
		Horizontal_Positional_Accuracy:  
			Horizontal_Positional_Accuracy_Report:  Sample locations are specified in geographic coordinates - latitude and longitude. The values are stated in decimal degrees. Sample locations were determined from hand-held global positioning system (GPS) units.  The accuracy depends on several factors, including the U.S. Department of Defense imposed Selective Availability and the position of the available satellites at the time of use. The accuracy ofthe GPS units with imposed SA is approximately
				100 meters (328 feet).  SA has been deactivated since May of 2000 so locations aquired after that date are  generally accurate to 25 meters (82 feet).  Also, the GPS units do not allow post-processing of the data. The maps and the GPS units use the 1927 North American Datum (NAD27) based on the Clarke 1866 ellipsoid.
		Vertical_Positional_Accuracy:  
			Vertical_Positional_Accuracy_Report:  No vertical information is included in these data.
	Lineage:  
		Source_Information:  
			Source_Citation:  
				Citation_Information:  
					Originator:  Bondar Clegg laboratories (2001),  ALS  USA Inc. (ALS Chemex) (2002,2003)
					Publication_Date:  2001-2003
					Title:  Geochemical Lab Report
			Source_Time_Period_of_Content:  
				Time_Period_Information:  
					Range_of_Dates/Times:  
						Beginning_Date:  2001
						Ending_Date:  2003
				Source_Currentness_Reference:  date of publication
			Source_Citation_Abbreviation:  Lab Reports
			Source_Contribution:  Analytical results
		Process_Step:  
			Process_Description:  Collection of samples in field.  Samples locations were determined via GPS (Garmin GPS models 12, 12CX, and etrex).  Occasionally locations were determined from maps when GPS signal quality was inadequate.
			Process_Date:  2001-2003
			Process_Contact:  
				Contact_Information:  
					Contact_Person_Primary:  
						Contact_Person:  Kirby Bean
						Contact_Organization:  Bureau of Land Management, Alaska
					Contact_Position:  Geologist
					Contact_Address:  
						Address_Type:  physical and mailing
						Address:  100 Savikko Rd
						City:  Douglas
						State_or_Province:  AK
						Postal_Code:  99824
						Country:  United States of America
					Contact_Voice_Telephone:  907-364-1566
					Contact_Facsimile_Telephone:  907-271-1574
					Contact_Electronic_Mail_Address:  Kirby_Bean@ak.blm.gov
					Hours_of_Service:  0800-1630
		Process_Step:  
			Process_Description:  Submit samples for analyses.  Samples were shipped from field locations to
				the selected laboratory.  The analysis company underwent a buyout during the
				mining district study.  The change in company names are indicated below:
				
				2001
				Bondar Clegg
				
				2002-2003
				ALS USA Inc.
			Process_Date:  2001-2003
			Process_Contact:  
				Contact_Information:  
					Contact_Person_Primary:  
						Contact_Person:  Kirby Bean
						Contact_Organization:  Bureau of Land Management, Alaska
					Contact_Position:  Geologist
					Contact_Address:  
						Address_Type:  physical and mailing
						Address:  100 Savikko Rd
						City:  Douglas
						State_or_Province:  AK
						Postal_Code:  99824
						Country:  United States of America
					Contact_Voice_Telephone:  907-364-1566
					Contact_Facsimile_Telephone:  907-271-1574
					Contact_Electronic_Mail_Address:  Kirby_Bean@ak.blm.gov
					Hours_of_Service:  0800-1630
		Process_Step:  
			Process_Description:  Retrieve laboratory reports in electronic form in comma separated format.
			Process_Date:  2001-2003
			Process_Contact:  
				Contact_Information:  
					Contact_Person_Primary:  
						Contact_Person:  Kirby Bean
						Contact_Organization:  Bureau of Land Management, Alaska
					Contact_Position:  Geologist
					Contact_Address:  
						Address_Type:  physical and mailing
						Address:  100 Savikko Rd
						City:  Douglas
						State_or_Province:  AK
						Postal_Code:  99824
						Country:  United States of America
					Contact_Voice_Telephone:  907-364-1566
					Contact_Facsimile_Telephone:  907-271-1574
					Contact_Electronic_Mail_Address:  Kirby_Bean@ak.blm.gov
					Hours_of_Service:  0800-1630
		Process_Step:  
			Process_Description:  Compiled all analytical results and field notes into Microsoft Acess database.
			Process_Date:  2003
			Process_Contact:  
				Contact_Information:  
					Contact_Person_Primary:  
						Contact_Person:  Kirby Bean
						Contact_Organization:  Bureau of Land Management, Alaska
					Contact_Position:  Geologist
					Contact_Address:  
						Address_Type:  physical and mailing
						Address:  100 Savikko Rd
						City:  Douglas
						State_or_Province:  AK
						Postal_Code:  99824
						Country:  United States of America
					Contact_Voice_Telephone:  907-364-1566
					Contact_Facsimile_Telephone:  907-271-1574
					Contact_Electronic_Mail_Address:  Kirby_Bean@ak.blm.gov
					Hours_of_Service:  0800-1630
	Cloud_Cover:  0
Spatial_Data_Organization_Information:  
	Direct_Spatial_Reference_Method:  Point
	Point_and_Vector_Object_Information:  
		SDTS_Terms_Description:  
			SDTS_Point_and_Vector_Object_Type:  Point
			Point_and_Vector_Object_Count:  960
Spatial_Reference_Information:  
	Horizontal_Coordinate_System_Definition:  
		Geographic:  
			Latitude_Resolution:  0.0001
			Longitude_Resolution:  0.0001
			Geographic_Coordinate_Units:  Decimal Degrees
		Geodetic_Model:  
			Horizontal_Datum_Name:  North American Datum of 1927
			Ellipsoid_Name:  Clarke 1866
			Semi-major_Axis:  6378206
			Denominator_of_Flattening_Ratio:  294.9786982
Entity_and_Attribute_Information:  
	Detailed_Description:  
		Entity_Type:  
			Entity_Type_Label:  Field names for "raw" geochemistry data
			Entity_Type_Definition:  Geochemistry and locations of geologic samples collected in the Delta River Mining District area.
			Entity_Type_Definition_Source:  U.S. Bureau of Land Management
		Attribute:  
			Attribute_Label:  Element
			Attribute_Definition:  Element analysed
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Typically atomic element, but may also include minerals.
		Attribute:  
			Attribute_Label:  Lat
			Attribute_Definition:  Latititude coordinates for the sample in decimal degrees using the NAD 1927 Alaska datum.
			Attribute_Definition_Source:  Global Positioning System
			Attribute_Domain_Values:  
				Range_Domain:  
					Range_Domain_Minimum:  62
					Range_Domain_Maximum:  65
					Attribute_Units_of_Measure:  decimal degrees
					Attribute_Measurement_Resolution:  0.0001
		Attribute:  
			Attribute_Label:  Long
			Attribute_Definition:  Longitude coordinates for the sample in decimal degrees using the NAD 1927 Alaska datum.
			Attribute_Definition_Source:  Global Positioning System
			Attribute_Domain_Values:  
				Range_Domain:  
					Range_Domain_Minimum:  -147
					Range_Domain_Maximum:  -144
					Attribute_Units_of_Measure:  decimal degrees
					Attribute_Measurement_Resolution:  0.0001
		Attribute:  
			Attribute_Label:  Lower
			Attribute_Definition:  Lower detection limit for the measurement technique
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Numeric value correlating with units of measure.
		Attribute:  
			Attribute_Label:  Method
			Attribute_Definition:  Analytical method used for the measurement.
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Dependent upon analyses required and lab equipment.
		Attribute:  
			Attribute_Label:  Preparation
			Attribute_Definition:  Type of preparation that preceded the analyses (i.e. partial or full digestion).
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Dependent upon analyses required and lab equipment.
		Attribute:  
			Attribute_Label:  Sample No
			Attribute_Definition:  Corresponds to sample numbers used in the written report.
			Attribute_Definition_Source:  Field Notes
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Number assigned at time sample is collected.
		Attribute:  
			Attribute_Label:  Unit
			Attribute_Definition:  Unit of measure for the analysis.
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Dependent upon test method and equipment.
		Attribute:  
			Attribute_Label:  Upper
			Attribute_Definition:  Upper detection limit for the analysis technique.
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Numeric value correlating with units of measure.
		Attribute:  
			Attribute_Label:  Value
			Attribute_Definition:  Measured value for element.  A negative symbol (-) denotes that a lower detection limit was reached.
			Attribute_Definition_Source:  Lab Reports
			Attribute_Domain_Values:  
				Unrepresentable_Domain:  Numeric value representing quantity of element analyzed.
Distribution_Information:  
	Distributor:  
		Contact_Information:  
			Contact_Person_Primary:  
				Contact_Person:  Jane Albrecht
				Contact_Organization:  Juneau Mineral Information Center
			Contact_Address:  
				Address_Type:  Physical and mailing
				Address:  100 Savikko Road, Mayflower Island
				City:  Juneau
				State_or_Province:  AK
				Postal_Code:  99824
				Country:  United States of America
			Contact_Voice_Telephone:  907-364-1553
			Contact_Facsimile_Telephone:  907-364-1574
			Contact_Electronic_Mail_Address:  Jane_Albrecht@ak.blm.gov
			Hours_of_Service:  0800-1630
	Distribution_Liability:  No warranty is made by the Bureau of Land Management as to the accuracy,
		reliability, or completeness of these data for individual use or
		aggregate use with other data.
	Standard_Order_Process:  
		Digital_Form:  
			Digital_Transfer_Information:  
				Format_Name:  All formats, compressed archive
				File_Decompression_Technique:  Compressed in ZIP format.  Decompression utilities can be downloaded from:
					http://www.pkzip.com
					http://www.winzip.com
			Digital_Transfer_Option:  
				Online_Option:  
					Computer_Contact_Information:  
						Network_Address:  
							Network_Resource_Name:  http://juneau.ak.blm.gov/data/geochem2003.zip
		Fees:  free
		Ordering_Instructions:  "raw" data available in digital form only
			available online at  http://juneau.ak.blm.gov/
	Technical_Prerequisites:  Digital data tables can be accessed with a text reader, spreadsheet, or database program.
	Available_Time_Period:  
		Time_Period_Information:  
			Single_Date/Time:  
				Calendar_Date:  2003
Metadata_Reference_Information:  
	Metadata_Date:  20030910
	Metadata_Review_Date:  20031021
	Metadata_Future_Review_Date:  
	Metadata_Contact:  
		Contact_Information:  
			Contact_Person_Primary:  
				Contact_Person:  Kirby Bean
				Contact_Organization:  Bureau of Land Management, Alaska
			Contact_Position:  Geologist
			Contact_Address:  
				Address_Type:  physical and mailing
				Address:  100 Savikko Rd
				City:  Douglas
				State_or_Province:  AK
				Postal_Code:  99824
				Country:  United States of America
			Contact_Voice_Telephone:  907-364-1566
			Contact_Facsimile_Telephone:  907-271-1574
			Contact_Electronic_Mail_Address:  Kirby_Bean@ak.blm.gov
			Hours_of_Service:  0800-1630
	Metadata_Standard_Name:  FGDC Content Standards for Digital Geospatial Metadata
	Metadata_Standard_Version:  FGDC-STD-001-1998
