Identification_Information: Citation: Citation_Information: Originator: V.J.S. Grauch Originator: Viki Bankey Publication_Date: 2003 Title: Aeromagnetic Interpretations for Understanding the Hydrogeologic Framework of the Southern Espanola Basin, New Mexico Edition: Version 1.0 Geospatial_Data_Presentation_Form: raster digital data Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: Open-File Report 03-124 Publication_Information: Publication_Place: Denver, Colorado, USA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2003/ofr-03-124 Description: Abstract: This report presents preliminary interpretations of aeromagnetic and gravity data of the southern Espanola Basin, New Mexico. The results depict the presence of and depth to many geologic features that have hydrogeologic significance, including shallow faults, different types of igneous units, and basement rocks. From these results, we can estimate the thickness of Santa Fe Group sediments, which constitute the primary aquifer system for residents of Santa Fe, Espanola, six Pueblo nations, and surrounding communities. Purpose: High-resolution aeromagnetic data were flown over the southern Espanola basin for the purposes of better understanding geologic controls on ground-water flow and storage. Supplemental_Information: The interpretations were accomplished using state-of-the-art magnetic- interpretation methods and geophysical profile modeling that incorporated gravity data and other geophysical and geologic constraints. Discussion of the interpretation results is divided by generalized geologic unit: Precambrian basement, Tertiary intrusive rocks and volcanic vents, Oligocene volcanic rocks (layered volcaniclastic and volcanic flow rocks), Pliocene-Quaternary volcanic rocks , Santa Fe Group, and shallow faults. Depths to the Oligocene volcanic rocks are significant because these rocks represent the base of the Santa Fe Group in the southern half of the study area. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 March Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: as needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.3 degrees West longitude East_Bounding_Coordinate: -105.875 degrees West longitude North_Bounding_Coordinate: 36.125 degrees North latitude South_Bounding_Coordinate: 35.375 degrees North latitude Keywords: Place: Place_Keyword_Thesaurus: none Place_Keyword: United States Place_Keyword: New Mexico Place_Keyword: Santa Fe Place_Keyword: Espanola Place_Keyword: Pueblo Nations Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geophysical data Theme_Keyword: aeromagnetic data Theme_Keyword: aeromagnetic grid Access_Constraints: none Use_Constraints: This digital database is not meant to be used or displayed at any scale larger than 1:24,000. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: V.J.S. (Tien) Grauch Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25046, MS964 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-1393 Contact_Electronic_Mail_Address: tien@usgs.gov Data_Set_Credit: Aeromagnetic data are subset from: Sweeney, R.E. Grauch, V.J.S. Phillips, J.D. U.S. Geological Survey Open-File Report 02-0205 Native_Data_Set_Environment: These grids were created using a combination of USGS processing programs on a UNIX system and Geosoft/Oasis software that is PC-based.. Cross_Reference: Citation_Information: Originator: R.E. Sweeney Originator: V.J.S. Grauch Originator: J.D. Phillips Publication_Date: 2002 Title: Merged digital aeromagnetic data for the Albuquerque and southern Espanola Basins, New Mexico Geospatial_Data_Presentation_Form: digital aeromagnetic grids Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: OFR 02-0205 Publication_Information: Publication_Place: Denver, CO, USA Publisher: U.S. Geological Survey Other_Citation_Details: Report contains digital aeromagnetic grids merged from airborne surveys flown in the United States for the USGS. These data were processed from the original digital data provided by the contractor to the USGS. Data are available online at the address below. Online_Linkage: http://pubs.usgs.gov/of/2002/ofr-02-0205 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The geotif image was created from gridded aeromagnetic data. Grid values represent the total intensity of the Earth's magnetic field after removal of the International Geomagnetic Reference Field (IGRF), and reduction to the pole (rtp). The data in the original grids have been processed using formulas and methods that are not usually documented but that represent industry standard practices for airborne data reduction. Logical_Consistency_Report: The data used to make the original grid was collected using different instruments (magnetometers, altimeters, navigational systems) throughout the survey. Survey contracts specified the conditions and specifications under which these data were collected. Standard industry practices of the time were followed in data collection and processing. More details are found in the report describing the compilation of the original grids: http://pubs.usgs.gov/of/2002/ofr-02-0205 Completeness_Report: Areas with no aeromagnetic data are left blank in the image. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Flight Path Recovery - Horizontal position of the survey aircraft used to collect data were determined using GPS satellite navigation. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The aircraft vertical position was determined using the navigational positioning equipment on the aircraft, which were radar altimeter and barometric altimeter. The final verticle position used for this grid is described in detail in Open-File Report 02-0205. Lineage: Process_Step: Process_Description: A subset of gridded aeromagnetic data, described in open-file report 02-0205, was created. The original grid was merged, filtered, and downward continued, and the above report describes the processing in detail. The color shaded-relief image of the reduced-to-pole magnetic data is included with minimal annotation in tagged image format (TIF) format for import into GIS programs or use with other overlays. The color shaded-relief images of the aeromagnetic data were derived originally from displays created by ERMAPPER, using a sun azimuth of 270 degrees (west), sun elevation of 60 degrees and nonlinear color scale. Process_Date: 2003 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: raster Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Universal_Transverse_Mercator: UTM_Zone_Number: 13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -105.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000.0 False_Northing: 0.0 Grid_Coordinate_System_Name: Universal Transverse Mercator Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 50 Ordinate_Resolution: 50 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 1/294.98 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: V.J.S. (Tien) Grauch Contact_Organization: U. S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25046, MS 964 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-1393 Contact_Electronic_Mail_Address: tien@usgs.gov Resource_Description: USGS Open-File Report OFR 03-124 Distribution_Liability: Although all data published in the grid has 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: geotif - filename sebrtp.tif geotif header file - filename sebrtp.tfw Format_Information_Content: tif: Tagged Image Format file of reduced-to-pole aeromagnetic data with tick marks as the only annotation. tfw: Without the header file, the tif file can be imported into many standard graphics programs. The header file provides geographic information(geotif) for direct import into ARC/INFO and ARC/VIEW. The .tfw file must be in the same directory as the .tif file. Transfer_Size: 3,574 KB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2003/ofr-03-124 Fees: no charge for online downloads Metadata_Reference_Information: Metadata_Date: 20030403 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Viki Bankey Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Box 25046 Mail Stop 964 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 303-236-1348 Contact_Electronic_Mail_Address: viki@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998