Olivine dissolution by acidic fluids in Argyre Planitia, Mars: Evidence for a widespread process

Research Article| July 01, 2008 Olivine dissolution by acidic fluids in Argyre Planitia, Mars: Evidence for a widespread process? Joshua L. Bandfield; Joshua L. Bandfield * 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195-1310, USA * E-mails: joshband@u.washington.edu; adrogers@notes.cc.sunysb.edu. Search for other works by this author on: GSW Google Scholar A. Deanne Rogers A. Deanne Rogers * 2Department of Geosciences, State University of New York, 255 Earth and Space Sciences Building, Stony Brook, New York 11794-2100, USA * E-mails: joshband@u.washington.edu; adrogers@notes.cc.sunysb.edu. Search for other works by this author on: GSW Google Scholar Author and Article Information Joshua L. Bandfield * 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195-1310, USA A. Deanne Rogers * 2Department of Geosciences, State University of New York, 255 Earth and Space Sciences Building, Stony Brook, New York 11794-2100, USA * E-mails: joshband@u.washington.edu; adrogers@notes.cc.sunysb.edu. Publisher: Geological Society of America Received: 21 Dec 2007 Revision Received: 27 Mar 2008 Accepted: 04 Apr 2008 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (7): 579–582. https://doi.org/10.1130/G24724A.1 Article history Received: 21 Dec 2007 Revision Received: 27 Mar 2008 Accepted: 04 Apr 2008 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Joshua L. Bandfield, A. Deanne Rogers; Olivine dissolution by acidic fluids in Argyre Planitia, Mars: Evidence for a widespread process?. Geology 2008;; 36 (7): 579–582. doi: https://doi.org/10.1130/G24724A.1 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 Compositional and morphological analyses of basin rim units in Argyre Planitia are consistent with local olivine-rich materials that become relatively olivine-poor in the process of being transformed from rocky materials to finer particulate regolith. Where high-thermal-inertia rocky surfaces are observed, the composition is more mafic than the surrounding fines. This relationship between rocks and soils appears to be common on Mars as a similar pattern is observed in other locations, such as Gusev Crater, Isidis Planitia, and Nili Fossae. Despite the lack of local detectable alteration products, these trends may be an indication that most Martian dark regions are not similar in composition to the primary igneous composition from which they are derived. The Martian crust may be significantly more mafic, and alteration of these surfaces may be more pervasive than has been inferred from the bulk surface mineralogy derived from orbital observations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.