Metadata: Identification_Information: Citation: Citation_Information: Originator: Rockwell, Barnaby W. Originator: Bonham, Lindsey C. Publication_Date: 2017 Title: Digital map of hydrothermal alteration type, key mineral groups, and green vegetation of the northwestern United States derived from automated analysis of ASTER satellite data Edition: 1.0 Geospatial_Data_Presentation_Form: Raster digital data Series_Information: Series_Name: USGS data release Issue_Identification: 10.5066/F7CR5RK7 Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/F7CR5RK7 Description: Abstract: Mineral groups identified through automated analysis of remote sensing data acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) were used to generate a map showing the type and spatial distribution of hydrothermal alteration, other exposed mineral groups, and green vegetation across the northwestern conterminous United States. Boolean algebra was used to combine mineral groups identified through analysis of visible, near-infrared, and shortwave-infrared ASTER data into attributed alteration types and mineral classes based on common mineralogical definitions of such types and the minerals present within the mineral groups. Alteration types modeled in this way can be stratified relative to acid producing and neutralizing potential to aid in geoenvironmental watershed studies. This mapping was performed in support of multidisciplinary studies involving the predictive modeling of mineral deposit occurrence and geochemical environments at watershed to regional scales. These studies seek to determine the relative effects of mining and non-anthropogenic hydrothermal alteration on watershed surface water geochemistry and faunal populations. The presence or absence of hydrothermally-altered rocks and (or) specific mineral groups can be used to model the favorability of occurrence of certain types of mineral deposits, and aid in the delineation of permissive tracts for these deposits. These data were used as a data source for the U.S. Geological Survey (USGS) Sagebrush Mineral-Resource Assessment (SaMiRA). This map, in ERDAS Imagine (.img) format, has been attributed by pixel value with material identification data that can be queried in most image processing and GIS software packages. Three files are included with this product: file with .img extension contains thematic image attributes and geographic projection data, file with .ige extension contains the raster data, and the file with .rrd extension includes pyramid data for fast display. Purpose: The purpose of the image is to display the spatial distribution of hydrothermal alteration types, key mineral groups, and green vegetation modeled by automated analysis of ASTER satellite remote sensing data covering the northwestern United States. Supplemental_Information: These data represent version 2 of the mosaic of the northwestern U.S. produced on June 11, 2013 using algorithm build AA61. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20000501 Ending_Date: 20071001 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -125.119620923 East_Bounding_Coordinate: -98.9894527256 North_Bounding_Coordinate: 49.5956281265 South_Bounding_Coordinate: 40.7688227906 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: propylitic Theme_Keyword: mineral mapping Theme_Keyword: ASTER Theme_Keyword: advanced argillic Theme_Keyword: hydrothermal alteration type Theme_Keyword: phyllic Theme_Keyword: remote sensing Theme_Keyword: epithermal Place: Place_Keyword_Thesaurus: Common geographic areas Place_Keyword: Washington Place_Keyword: North Dakota Place_Keyword: Oregon Place_Keyword: Montana Place_Keyword: Idaho Place_Keyword: Wyoming Place_Keyword: Nebraska Place_Keyword: South Dakota Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Access_Constraints: None Use_Constraints: Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Data have been checked to ensure the accuracy of the data. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcGIS and ERDAS Imagine formats, this metadata file may include some terminology specific to those software packages. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Barnaby W. Rockwell Contact_Position: Research Geophysicist Contact_Address: Address_Type: Mailing Address: Box 25046, Mail Stop 973 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: US Contact_Voice_Telephone: 303-236-1851 Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.4.1 (Build 5686) Service Pack N/A (Build N/A) Cross_Reference: Citation_Information: Originator: Rockwell, Barnaby W. Publication_Date: 20110101 Title: Description and validation of an automated methodology for mapping mineralogy, vegetation, and hydrothermal alteration type from ASTER satellite imagery with examples from the san juan mountains, Colorado Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3190 Publication_Information: Publication_Place: Denver, CO Publisher: U.S. Geological Survey Online_Linkage: https://pubs.usgs.gov/sim/3190 Data_Quality_Information: Lineage: Process_Step: Process_Description: Methods used to derive these data are described in https://pubs.usgs.gov/sim/3190/contents/SIM3190_pam.pdf . Process_Date: 2013 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 32699 Column_Count: 68458 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000269941139971 Longitude_Resolution: 0.000381696342245 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: aster_northwest_aa61_v2_6-11-13.img.vat Entity_Type_Definition: Table containing attribute information associated with the data set. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: OID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Value Attribute_Definition: Internal digital number Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: Count Attribute_Definition: Value frequency count Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 454432322 Attribute: Attribute_Label: Red Attribute_Definition: Red value of color table Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Green Attribute_Definition: Green value of color table Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Blue Attribute_Definition: Blue value of color table Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Opacity Attribute_Definition: Opacity of value - denotes whether or not a material ID has been assigned Attribute_Definition_Source: Author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: MaterialID Attribute_Definition: Material(s) identified in a pixel. Enumerated_Domain_Values correspond to the internal digital number values of the "Value" attribute. Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: No materials classified Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Minor ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Major ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Advanced argillic +/- ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Argillic (kandite clay +/- sericite +/- smectite) +/- minor advanced argillic Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Sericite and (or) smectite Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: Carbonate-propylitic Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: Dolomite (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 8 Enumerated_Domain_Value_Definition: Jarosite +/- sericite +/- smectite, or hydrous silica + ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: Hydrous silica Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: Sericite + chlorite or Fe/Mg sericite Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11 Enumerated_Domain_Value_Definition: Argillic + ferric iron or weathered phyllic +/- minor advanced argillic Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Sericite and (or) smectite + ferric iron (may include fresh phyllic) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: Carbonate-propylitic + sericite and (or) smectite Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 14 Enumerated_Domain_Value_Definition: Green vegetation Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 15 Enumerated_Domain_Value_Definition: Carbonate-propylitic + ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 16 Enumerated_Domain_Value_Definition: Sericite + chlorite or Fe/Mg sericite + ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 17 Enumerated_Domain_Value_Definition: Carbonate-propylitic + sericite and (or) smectite + ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 18 Enumerated_Domain_Value_Definition: Dolomite + ferric iron (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: Carbonate-propylitic +/- hydrous silica (may include some dolomite) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 20 Enumerated_Domain_Value_Definition: Carbonate-propylitic +/- hydrous silica + ferric iron (may include some dolomite) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 21 Enumerated_Domain_Value_Definition: Ferrous or coarse-grained ferric iron (may include oxidized basalts, fire ash, some moist soils, and any blue/green rocks) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 22 Enumerated_Domain_Value_Definition: Carbonate-propylitic + ferrous or coarse-grained ferric iron Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 23 Enumerated_Domain_Value_Definition: Dolomite + ferrous or coarse-grained ferric iron (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 45 Enumerated_Domain_Value_Definition: Dry vegetation in fallow agricultural fields - deep 2.17 and 2.20 micron absorption (identified as argillic, class 4, yellow) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 46 Enumerated_Domain_Value_Definition: Dry, yellow/brown veg. in fallow agricultural fields - 2.17 and 2.20 micron absorption (identified as argillic + Fe, class 11, orange) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 47 Enumerated_Domain_Value_Definition: Dry vegetation in fallow agricultural fields - deep 2.17 micron absorption (identified as advanced argilllic, class 3, red) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 48 Enumerated_Domain_Value_Definition: No data (clouds, cloud shadow, smoke, haze, data errors) Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 49 Enumerated_Domain_Value_Definition: Semi-corrupted SWIR band 5: identified advanced argillic and argillic alteration may be unreliable Enumerated_Domain_Value_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 50 Enumerated_Domain_Value_Definition: Semi-corrupted SWIR band 7: identified dolomite, hydrous silica, and jarosite may be unreliable Enumerated_Domain_Value_Definition_Source: Author Overview_Description: Entity_and_Attribute_Overview: Results of merging of mineral groups identified through automated analysis of ASTER multispectral data. The digital number (DN) values in this image have been attributed by modeled alteration type, mineral group, or green vegetation as shown in the following table. Each DN value corresponds to a particular color in the included color table. All pixels identified as a particular alteration type or mineral group have been assigned a single, discrete color. Pixels with a DN value of zero indicate either that no materials were identified or that no input spectral data were available. There are no DN data values in the range of 24-44 or greater than 50. >Value Count Red Green Blue Opacity MaterialID > 1 18455527 1 0.749 0.8 1 Minor ferric iron > 2 719220 0.929 0.51 0.929 1 Major ferric iron > 3 2595880 1 0 0 1 Advanced argillic +/- ferric iron > 4 2137365 1 1 0 1 Argillic (kandite clay +/- sericite +/- smectite) +/- minor advanced argillic > 5 78094642 0.129 0.788 0.718 1 Sericite and (or) smectite > 6 2140915 0 1 0 1 Carbonate-propylitic > 7 898039 0 0 1 1 Dolomite (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) > 8 203441 1 0 1 1 Jarosite +/- sericite +/- smectite, or hydrous silica + ferric iron > 9 2549741 0.588 0.247 0.8 1 Hydrous silica >10 1397612 0.298 0.62 0.42 1 Sericite + chlorite or Fe/Mg sericite >11 916940 1 0.647 0 1 Argillic + ferric iron or weathered phyllic +/- minor advanced argillic >12 32659247 0 1 1 1 Sericite and (or) smectite + ferric iron (may include fresh phyllic) >13 576976 0.82 0.71 0.549 1 Carbonate-propylitic + sericite and (or) smectite >14 454432322 0 0.388 0 1 Green vegetation >15 1328216 0.647 0.157 0.157 1 Carbonate-propylitic + ferric iron >16 252995 0.62 0.749 0.129 1 Sericite + chlorite or Fe/Mg sericite + ferric iron >17 5395824 0.859 0.557 0.486 1 Carbonate-propylitic + sericite and (or) smectite + ferric iron >18 140119 0.576 0.737 0.878 1 Dolomite + ferric iron (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) >19 9170 0.639 0.6 0.808 1 Carbonate-propylitic +/- hydrous silica (may include some dolomite) >20 555 0.71 0.576 0.808 1 Carbonate-propylitic +/- hydrous silica + ferric iron (may include some dolomite) >21 15910210 0.357 0.447 0.498 1 Ferrous or coarse-grained ferric iron (may include oxidized basalts, fire ash, some moist soils, and any blue/green rocks) >22 123166 0.486 0.486 0.188 1 Carbonate-propylitic + ferrous or coarse-grained ferric iron >23 50824 0.22 0.486 0.737 1 Dolomite + ferrous or coarse-grained ferric iron (may include Mg/Fe-OH phyllosilicates or epidote in igneous and metamorphic terranes) >24 0 0 0 0 1 >25 0 0 0 0 1 >26 0 0 0 0 1 >27 0 0 0 0 1 >28 0 0 0 0 1 >29 0 0 0 0 1 >30 0 0 0 0 1 >31 0 0 0 0 1 >32 0 0 0 0 1 >33 0 0 0 0 1 >34 0 0 0 0 1 >35 0 0 0 0 1 >36 0 0 0 0 1 >37 0 0 0 0 1 >38 0 0 0 0 1 >39 0 0 0 0 1 >40 0 0 0 0 1 >41 0 0 0 0 1 >42 0 0 0 0 1 >43 0 0 0 0 1 >44 0 0 0 0 1 >45 176399 0.4 0.2 0.086 1 Dry vegetation in fallow agricultural fields - deep 2.17 and 2.20 micron absorption (identified as argillic, class 4, yellow) >46 159482 0.529 0.239 0.11 1 Dry, yellow/brown veg. in fallow agricultural fields - 2.17 and 2.20 micron absorption (identified as argillic + Fe, class 11, orange) >47 451561 0.627 0.318 0.176 1 Dry vegetation in fallow agricultural fields - deep 2.17 micron absorption (identified as advanced argilllic, class 3, red) >48 21435017 0.149 0.149 0.149 1 No data (clouds, cloud shadow, smoke, haze, data errors) >49 103303300 0.2 0.2 0.2 1 Semi-corrupted SWIR band 5: identified advanced argillic and argillic alteration may be unreliable >50 107136639 0.247 0.247 0.247 1 Semi-corrupted SWIR band 7: identified dolomite, hydrous silica, and jarosite may be unreliable Raster filename: aster_northwest_aa61_v2_6-11-13.img Entity_and_Attribute_Detail_Citation: https://pubs.usgs.gov/sim/3190/ Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: US Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) Contact_Electronic_Mail_Address: sciencebase@usgs.gov Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. This database, identified as USGS Data Release 10.5066/F7CR5RK7, has been approved for release and publication by the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Raster Digital Data Set Format_Version_Number: 11.0.1 File_Decompression_Technique: no compression applied Transfer_Size: 9.04 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/F7CR5RK7 Fees: none Metadata_Reference_Information: Metadata_Date: 20190128 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Eastern Mineral and Environmental Resources Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998