Halite focusing and amplification of salt layer thickness: From the Dead Sea to deep hypersaline basins
2018; Geological Society of America; Volume: 46; Issue: 10 Linguagem: Inglês
10.1130/g45339.1
ISSN1943-2682
AutoresIdo Sirota, Yehouda Enzel, Nadav G. Lensky,
Tópico(s)Building materials and conservation
ResumoResearch Article| September 07, 2018 Halite focusing and amplification of salt layer thickness: From the Dead Sea to deep hypersaline basins Ido Sirota; Ido Sirota * 1Geological Survey of Israel, Jerusalem 95501, Israel2The Fredy and Nadine Herrmann Institute of Earth Sciences, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel *E-mails: ido.sirota@mail.huji.ac.il; Yehouda.Enzel@mail.huji.ac.il; nadavl@gsi.gov.il Search for other works by this author on: GSW Google Scholar Yehouda Enzel; Yehouda Enzel * 2The Fredy and Nadine Herrmann Institute of Earth Sciences, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel *E-mails: ido.sirota@mail.huji.ac.il; Yehouda.Enzel@mail.huji.ac.il; nadavl@gsi.gov.il Search for other works by this author on: GSW Google Scholar Nadav G. Lensky Nadav G. Lensky * 1Geological Survey of Israel, Jerusalem 95501, Israel *E-mails: ido.sirota@mail.huji.ac.il; Yehouda.Enzel@mail.huji.ac.il; nadavl@gsi.gov.il Search for other works by this author on: GSW Google Scholar Author and Article Information Ido Sirota * 1Geological Survey of Israel, Jerusalem 95501, Israel2The Fredy and Nadine Herrmann Institute of Earth Sciences, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel Yehouda Enzel * 2The Fredy and Nadine Herrmann Institute of Earth Sciences, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel Nadav G. Lensky * 1Geological Survey of Israel, Jerusalem 95501, Israel *E-mails: ido.sirota@mail.huji.ac.il; Yehouda.Enzel@mail.huji.ac.il; nadavl@gsi.gov.il Publisher: Geological Society of America Received: 12 Nov 2017 Revision Received: 06 Aug 2018 Accepted: 08 Aug 2018 First Online: 07 Sep 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2018) 46 (10): 851–854. https://doi.org/10.1130/G45339.1 Article history Received: 12 Nov 2017 Revision Received: 06 Aug 2018 Accepted: 08 Aug 2018 First Online: 07 Sep 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Ido Sirota, Yehouda Enzel, Nadav G. Lensky; Halite focusing and amplification of salt layer thickness: From the Dead Sea to deep hypersaline basins. Geology 2018;; 46 (10): 851–854. doi: https://doi.org/10.1130/G45339.1 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 Worldwide stratigraphic records present thick halite layers accreted in deep hypersaline basins under dry climate conditions. The thickness and distribution of these halite units are used in basin analyses and paleoenvironmental reconstructions. Recent studies have raised doubts regarding the assumption that a given halite layer’s thickness is directly related to net evaporation of the overlying water, where the areas of both water surface and deposited halite are similar. Here we present halite focusing, a limno-sedimentological model for halite accumulation based on observations from the Dead Sea. The model accounts for a halite-saturated hypersaline basin under negative water balance and a stratified water column. Under such stratification, double-diffusive flux transfers dissolved salt from the epilimnion (upper water layer in a stratified lake) down to the hypolimnion, resulting in an undersaturated epilimnion and continuous halite focusing; i.e., large amplification (increasing thickness of halite layers) of its accretion in the depocenter, at the expense of dissolution from the shallow basin margins. Halite focusing can almost triple the thickness calculated by uniform precipitation, meaning that a given halite unit may have accumulated faster, during shorter, less-arid intervals than previously proposed. Halite focusing explains (1) extremely high deposition rates, (2) accretion of exceptionally thick halite sequences in deep basins, and (3) a marginal basin that is fully or partially devoid of halite, with coeval thick sequence deposition in the deep basin. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Referência(s)