Diagenetic, nonevaporative origin for gypsum

Research Article| May 01, 1990 Diagenetic, nonevaporative origin for gypsum Roger J. Bain Roger J. Bain 1Department of Geology, University of Akron, Akron, Ohio 44325 Search for other works by this author on: GSW Google Scholar Author and Article Information Roger J. Bain 1Department of Geology, University of Akron, Akron, Ohio 44325 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (5): 447–450. https://doi.org/10.1130/0091-7613(1990)0182.3.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 Roger J. Bain; Diagenetic, nonevaporative origin for gypsum. Geology 1990;; 18 (5): 447–450. doi: https://doi.org/10.1130/0091-7613(1990)0182.3.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 Paleoenvironmental interpretations commonly cite the occurrence of gypsum associated with nonfossiliferous redbeds as evidence for arid conditions and high evaporation rates. Such interpretations ignore the common occurrence of gypsum in gossan, on weathered black shale surfaces, and especially in Pleistocene glacial deposits. Glaciolacustrine deltaic sequences in Ohio contain abundant large gypsum crystals that formed diagenetically as a result of oxidation of sulfides by calcium-rich, oxidizing ground water. Crystals display two forms related to the host sediment. Euhedral, tabular crystals occur in pliable prodelta mud, whereas bladed, dovetail gypsum sand crystals occur in grain-supported delta-front sand. The diagenetic non-evaporative model could explain the formation of gypsum in numerous sedimentary sequences: dune-tidal flat, beach-lagoon, reef-lagoon, deltaic, and barrier bar-lagoon. Massive, extensive sulfate accumulations probably formed under arid conditions; however, the nonevaporative, diagenetic model should be considered in the interpretation of scattered gypsum crystals and thin gypsum crusts. 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.