Geologic Map of the Esperanza Mill 7.5' Quadrangle, Pima County, Arizona, v. 2.0
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KeywordsArizona Geological Survey Digital Geologic Maps
National Geologic Mapping Act
extensive mine tailings
Santa Cruz River deposits
MetadataShow full item record
CitationSpencer, J.E., Ferguson, C.A., Richard, S.M., and Youberg, A., 2019, Geologic Map of the Esperanza Mill 7.5' Quadrangle, Pima County, Arizona: Arizona Geological Survey Digital Geologic Map DGM-33, version 2.0, map scale 1:24,000, 10 p., 1 map sheet and metadata.
PublisherArizona Geological Survey (Tucson, AZ)
DescriptionThe Esperanza Mill 7 ½' Quadrangle is located approximately 40 km south-southwest of downtown Tucson, and is on the southeast flank of the Sierrita Mountains. The quadrangle encompasses the eastern edge of the Esperanza ore body, which is now mined from within a single large open pit that encompasses both the Sierrita and Esperanza ore bodies. It also encompasses bedrock hills on the southeastern flank of the Sierrita Mountains, extensive piedmont alluvial deposits, Santa Cruz River deposits, and extensive mine tailings from the Sierrita-Esperanza mine. Bedrock in the area was mapped during December 2002 to May 2003. Quaternary deposits, mapped earlier by Pearthree and Youberg (2000), were the target of mapping in specific areas that were considered to be incompletely understood. In addition, all of the Quaternary deposits were evaluated and in part reinterpreted based on aerial photograph interpretation. All of this mapping was done as part of a multiyear mapping program directed at producing complete geologic map coverage for the Phoenix-Tucson metropolitan corridor. This map is one of four 1:24,000 scale geologic maps that cover most of the Sierrita Mountains and that were produced for this study. This mapping was done under the joint State-Federal STATEMAP program, as specified in the National Geologic Mapping Act of 1992. Mapping was jointly funded by the Arizona Geological Survey and the U.S. Geological Survey under STATEMAP Program Contract #02HQAG0016.
RightsArizona Geological Survey. All rights reserved.
Collection InformationDocuments in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact firstname.lastname@example.org.
North Bounding Coordinate31.875
South Bounding Coordinate31.75
West Bounding Coordinate-111.126
East Bounding Coordinate-111
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