Geology and production of Middle Tertiary Mineral Districts in Arizona
Issue Date
1985-01-31Keywords
Arizona Geological Survey Open File ReportsYuma County
Coconino County
Mohave County
Santa Cruz County
Greenlee County
La Paz County
Graham County
Gila County
Cochise County
Yavapai County
Navajo County
Apache County
Pinal County
Maricopa County
Pima County
Arizona
geochronology
economic mineralogy
geomorphology
metallic mineralization
mineral districts
Geology
Middle Tertiary
Metadata
Show full item recordCitation
Welty, J.W., Spencer, J.E., Allen, G.B., Reynolds, S.J. and Trapp, R.A., 1985, Geology and production of Middle Tertiary Mineral Districts in Arizona. Arizona Geological Survey Open File Report, OFR-85-01, 88 p.Description
Areas of known metallic mineralization in Arizona, with recorded production, have been divided into 453 mineral districts, nearly 180 of which are known or suspected to be mid-Tertiary in age (Keith and others, 1983a,b). This report briefly describes the geology of mid-Tertiary mineral districts in Arizona that were considered by Keith and others (1983a,b) to be mid-Tertiary, and examines the basis of age determinations for each of them. This report is preliminary in nature, and Bureau-directed mapping and research continues in order to clarify the nature of mid-Tertiary metallogenesis. Table 1 consists of summaries, based largely upon a review of the published literature, of the geology of mid-Tertiary mineral districts of Arizona. Only mineral districts with greater than 100 tons recorded production are included in the compilation. Following each mineral district name is a list of the metals produced, in order of decreasing value at the time of production. A brief description of the geology of each mineral district is provided and succeeded by a discussion of the data constraining the age of each district. Many of the districts designated as mid-Tertiary by Keith and others (1983a,b) are thought by us to be older, but are included for completeness. The essential references for each mineral district are also provided. The references are cited by number and listed alphabetically and numerically at the end of this report. Keith and others (1983b) provide a comprehensive list of references for all metallic mineral districts in the Basin and Range Province of Arizona. Many of these references are of limited value; therefore, we list only those most useful in compiling the basic geologic and geochronologic information. Figure 1 is a map showing all the mineral districts in Arizona of presumed middle Tertiary age. We have included districts of problematic age on the figure for completeness. (88 pages)Additional Links
http://repository.azgs.az.gov/uri_gin/azgs/dlio/475Language
enSeries/Report no.
OFR-85-01Rights
Arizona Geological Survey. All rights reserved.Collection Information
Documents 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 azgs-info@email.arizona.edu.North Bounding Coordinate
37.0552South Bounding Coordinate
31.3161West Bounding Coordinate
-114.785East Bounding Coordinate
-109.028Collections
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