• Login
    View Item 
    •   Home
    • Colleges, Departments, and Organizations
    • Arizona Geological Survey (AZGS)
    • AZGS Document Repository
    • View Item
    •   Home
    • Colleges, Departments, and Organizations
    • Arizona Geological Survey (AZGS)
    • AZGS Document Repository
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    The geology and mineral deposits of the northern Plomosa District, La Paz County, Arizona

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    OFR_90_10.pdf
    Size:
    2.525Mb
    Format:
    PDF
    Download
    Thumbnail
    Name:
    PlomosaDistrict_AZGS-OFR90-10.pdf
    Size:
    40.88Mb
    Format:
    PDF
    Download
    Author
    Duncan, J.T.
    Issue Date
    1990-12-01
    Keywords
    Arizona Geological Survey Open File Reports
    Plomosa Mountains
    La Paz County
    Arizona
    fault
    malachite
    chrysocolla
    gold
    lacustrine sediment
    economic mineralogy
    mineral deposits
    Geology
    Miocene
    hematite
    fluid inclusions
    detachment fault
    Show allShow less
    
    Metadata
    Show full item record
    Citation
    Duncan, J.T., 1990, The geology and mineral deposits of the northern Plomosa District, La Paz County, Arizona. Arizona Geological Survey Open File Report, OFR-90-10, 1 map sheet, 55 p.
    Publisher
    Arizona Geological Survey (Tucson, AZ)
    Description
    The Northern Plomosa district in west-central Arizona is a mid-Miocene Au-Cu district hosted by Miocene lacustrine sedimentary and volcanic rocks and their Proterozoic crystalline depositional basement. The host rocks are in the upper plate of the Plomosa detachment fault and are broken and tilted to the southwest by numerous northwest-striking listric normal faults which are the main controls on mineralization. The primary ore minerals are native gold, chrysocolla, and malachite. Gangue minerals include specular and earthy hematite, quartz, barite, fluorite, calcite and manganese oxides. Although open-space filling textures are locally abundant, most of the economic mineralization occurs as fault-controlled replacements in calcareous sediments. Fluid inclusions indicate that the mineralizing system involved low temperature (150 to 250°C), high salinity (17 to 26 eq. wt. % NaCI) fluids. Oxygen, sulfur, and carbon isotopes from the hydrothermal minerals are consistently heavy and, combined with fluid salinities, suggest that the mineralizing fluids were basin brines. (55 pages)
    URI
    http://hdl.handle.net/10150/630805
    Additional Links
    http://repository.azgs.az.gov/uri_gin/azgs/dlio/315
    Language
    en
    Series/Report no.
    OFR-90-10
    Rights
    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
    33.9707
    South Bounding Coordinate
    33.5506
    West Bounding Coordinate
    -114.329
    East Bounding Coordinate
    -113.862
    Collections
    AZGS Document Repository

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.