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Holocene shallow-subtidal dolomitization by near-normal seawater, northern Belize

1995; Geological Society of America; Volume: 23; Issue: 4 Linguagem: Inglês

10.1130/0091-7613(1995)023 2.3.co;2

1943-2682

S. J. Mazzullo, William D. Bischoff, C. Teal,

Geological and Geophysical Studies Worldwide

Research Article| April 01, 1995 Holocene shallow-subtidal dolomitization by near-normal seawater, northern Belize S. J. Mazzullo; S. J. Mazzullo 1Department of Geology, Wichita State University, Wichita, Kansas 67260 Search for other works by this author on: GSW Google Scholar William D. Bischoff; William D. Bischoff 1Department of Geology, Wichita State University, Wichita, Kansas 67260 Search for other works by this author on: GSW Google Scholar C. S. Teal C. S. Teal 1Department of Geology, Wichita State University, Wichita, Kansas 67260 Search for other works by this author on: GSW Google Scholar Geology (1995) 23 (4): 341–344. https://doi.org/10.1130/0091-7613(1995)023 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 MailTo Tools Icon Tools Get Permissions Search Site Citation S. J. Mazzullo, William D. Bischoff, C. S. Teal; Holocene shallow-subtidal dolomitization by near-normal seawater, northern Belize. Geology 1995;; 23 (4): 341–344. doi: https://doi.org/10.1130/0091-7613(1995)023 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 Calcic dolomite cements compose an average of 5% of the upper 4.3 m of subtidal deposits <5600 yr old in the Cangrejo shoals in Belize. Mean δ18O (+2‰) compositions of the high-Sr dolomites (mean October 1900 ppm), together with near-normal salinity and inherently normal Mg/Ca ratio of pore fluids, suggest precipitation from near-normal seawater. Tidal and wind-driven circulation of seawater through the sediments supplies most of the Mg for dolomitization, which appears to be promoted by elevated pore-water alkalinity resulting from bacterially mediated oxidation of organic matter and, locally, early stages of methanogenesis. Rapid dolomitization here supports the idea that significant quantities of dolomite can form syndepositionally, from normal seawater, in shallow subtidal deposits. 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.