Research Article| August 01, 2009 Salt tectonics and collapse of Hebes Chasma, Valles Marineris, Mars J.B. Adams; J.B. Adams 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar A.R. Gillespie; A.R. Gillespie 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar M.P.A. Jackson; M.P.A. Jackson 2Bureau of Economic Geology, University of Texas at Austin, Austin, Texas 78713, USA Search for other works by this author on: GSW Google Scholar D.R. Montgomery; D.R. Montgomery 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar T.P. Dooley; T.P. Dooley 2Bureau of Economic Geology, University of Texas at Austin, Austin, Texas 78713, USA Search for other works by this author on: GSW Google Scholar J.-P. Combe; J.-P. Combe 3Bear Fight Center, P.O. Box 667, Winthrop, Washington 98862, USA Search for other works by this author on: GSW Google Scholar B.C. Schreiber B.C. Schreiber 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Author and Article Information J.B. Adams 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA A.R. Gillespie 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA M.P.A. Jackson 2Bureau of Economic Geology, University of Texas at Austin, Austin, Texas 78713, USA D.R. Montgomery 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA T.P. Dooley 2Bureau of Economic Geology, University of Texas at Austin, Austin, Texas 78713, USA J.-P. Combe 3Bear Fight Center, P.O. Box 667, Winthrop, Washington 98862, USA B.C. Schreiber 1Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA Publisher: Geological Society of America Received: 09 Jan 2009 Revision Received: 18 Mar 2009 Accepted: 19 Mar 2009 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2009 Geological Society of America Geology (2009) 37 (8): 691–694. https://doi.org/10.1130/G30024A.1 Article history Received: 09 Jan 2009 Revision Received: 18 Mar 2009 Accepted: 19 Mar 2009 First Online: 03 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 J.B. Adams, A.R. Gillespie, M.P.A. Jackson, D.R. Montgomery, T.P. Dooley, J.-P. Combe, B.C. Schreiber; Salt tectonics and collapse of Hebes Chasma, Valles Marineris, Mars. Geology 2009;; 37 (8): 691–694. doi: https://doi.org/10.1130/G30024A.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 A photogeologic and physical modeling study indicates that Hebes Chasma, Mars, formed by collapse of the megaregolith. Local heating facilitated drainage of ~105 km3 of brines and entrained particulates through fractures in the chasma floor and into a regional aquifer. A megaregolith rich in salts and water is implied by massive, low-gradient allochthonous flows that terminate in deep pits and troughs, by emergent diapirs, and by arching of Hebes Mensa. These structures are consistent with plastic and viscous deformation but inconsistent with collapse of basalt flows and/or tephra. Spectral measurements confirm that hydrated sulfate salts are spatially associated with allochthonous flows from depth and light-toned deposits. Collapse features and flows are present in many other chasmata in Valles Marineris, suggesting that widespread salt tectonics and dissolution may have shaped the region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.