Evaporitic-source model for igneous-related Fe oxide–(REE-Cu-Au-U) mineralization

Abstract

Research Article| March 01, 1996 Evaporitic-source model for igneous-related Fe oxide–(REE-Cu-Au-U) mineralization Mark D. Barton; Mark D. Barton 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar David A. Johnson David A. Johnson 1Department of Geosciences, University of Arizona, Tucson, Arizona 85721 Search for other works by this author on: GSW Google Scholar Geology (1996) 24 (3): 259–262. https://doi.org/10.1130/0091-7613(1996)024<0259:ESMFIR>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Mark D. Barton, David A. Johnson; Evaporitic-source model for igneous-related Fe oxide–(REE-Cu-Au-U) mineralization. Geology 1996;; 24 (3): 259–262. doi: https://doi.org/10.1130/0091-7613(1996)024<0259:ESMFIR>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract We propose that many igneous-related Fe oxide–rich (REE-Cu-Au-U–bearing) deposits form by hydrothermal processes involving evaporitic ligand sources, either coeval salars or older evaporites. These deposits are abundant in both Phanerozoic and Proterozoic extensional continental and continent-margin settings. They commonly form in global arid zones, but they also occur where magmatism is superimposed upon older evaporites. Magmatic compositions exert only second-order control, mainly on alteration mineralogy and on element abundances. Hot S-poor brines generated by interaction with evaporitic materials are consistent with geologic settings and help rationalize the distinctive element enrichments (siderophile, lithophile) and hydrothermal alteration (sodic, locally alkaline) found in these systems. This model contrasts with immiscible oxide melt and magmatic-hydrothermal origins commonly proposed for these deposits, although all three mechanisms can occur. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.