Pseudomorphs after evaporitic minerals interbedded with 2.2 Ga stromatolites of the Yerrida basin, Western Australia: Origin and significance

Abstract

Research Article| October 01, 1999 Pseudomorphs after evaporitic minerals interbedded with 2.2 Ga stromatolites of the Yerrida basin, Western Australia: Origin and significance Mohamed El Tabakh; Mohamed El Tabakh 1School of Earth and Environmental Sciences, Queens College, Flushing, New York 11367, USA Search for other works by this author on: GSW Google Scholar Kathleen Grey; Kathleen Grey 2Department of Minerals and Energy, Geological Survey of Western Australia, 100 Plain Street, Western Australia 6004, Australia Search for other works by this author on: GSW Google Scholar Franco Pirajno; Franco Pirajno 2Department of Minerals and Energy, Geological Survey of Western Australia, 100 Plain Street, Western Australia 6004, Australia Search for other works by this author on: GSW Google Scholar B. Charlotte Schreiber B. Charlotte Schreiber 3Department of Geology, 195 Rankin Science Building, Appalachian State College, Boone, North Carolina 28608, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Mohamed El Tabakh 1School of Earth and Environmental Sciences, Queens College, Flushing, New York 11367, USA Kathleen Grey 2Department of Minerals and Energy, Geological Survey of Western Australia, 100 Plain Street, Western Australia 6004, Australia Franco Pirajno 2Department of Minerals and Energy, Geological Survey of Western Australia, 100 Plain Street, Western Australia 6004, Australia B. Charlotte Schreiber 3Department of Geology, 195 Rankin Science Building, Appalachian State College, Boone, North Carolina 28608, USA Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1999) 27 (10): 871–874. https://doi.org/10.1130/0091-7613(1999)027<0871:PAEMIW>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 Email Permissions Search Site Citation Mohamed El Tabakh, Kathleen Grey, Franco Pirajno, B. Charlotte Schreiber; Pseudomorphs after evaporitic minerals interbedded with 2.2 Ga stromatolites of the Yerrida basin, Western Australia: Origin and significance. Geology 1999;; 27 (10): 871–874. doi: https://doi.org/10.1130/0091-7613(1999)027<0871:PAEMIW>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 Widespread quartz pseudomorphs after evaporitic minerals are interbedded with stromatolites in 2.2 Ga sedimentary rocks in the Yerrida rift basin of Western Australia. These deposits preserve diverse original crystal morphologies that grew displacively either as individuals or as clusters within stromatolitic horizons and associated fine-grained siliciclastic beds. The stromatolites were deposited in shallow-marine, restricted environments. Although evaporitic minerals are largely replaced by quartz, their crystal shapes include lenticular, rosette, needle, and nodular forms, suggesting that they formed from calcium sulfate–rich brines. Textures suggest that replacement by quartz occurred during early alteration of the sediments. Original calcium sulfate minerals such as gypsum or anhydrite are indicated by the morphologies of the pseudomorphs; this concept is supported by anhydrite inclusions in the quartz crystals that form the pseudomorphs, and this finding indicates that calcium sulfate existed in Early Proterozoic sedimentary environments. 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.