New distribution coefficient for the incorporation of strontium into dolomite and its implications for the formation of ancient dolomites 论文

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Research Article| May 01, 1990 New distribution coefficient for the incorporation of strontium into dolomite and its implications for the formation of ancient dolomites Volker C. Vahrenkamp; Volker C. Vahrenkamp 1Geology and Geophysics, RSMAS, University of Miami, 4600 Rickenbacker Causeway,Miami, Florida 33149 Search for other works by this author on: GSW Google Scholar Peter K. Swart Peter K. Swart 1Geology and Geophysics, RSMAS, University of Miami, 4600 Rickenbacker Causeway,Miami, Florida 33149 Search for other works by this author on: GSW Google Scholar Author and Article Information Volker C. Vahrenkamp 1Geology and Geophysics, RSMAS, University of Miami, 4600 Rickenbacker Causeway,Miami, Florida 33149 Peter K. Swart 1Geology and Geophysics, RSMAS, University of Miami, 4600 Rickenbacker Causeway,Miami, Florida 33149 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): 387–391. https://doi.org/10.1130/0091-7613(1990)018<0387:NDCFTI>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 Volker C. Vahrenkamp, Peter K. Swart; New distribution coefficient for the incorporation of strontium into dolomite and its implications for the formation of ancient dolomites. Geology 1990;; 18 (5): 387–391. doi: https://doi.org/10.1130/0091-7613(1990)018<0387:NDCFTI>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 Late Tertiary dolomites from the Bahamas exhibit a strong inverse correlation between Sr and mol% MgCO3. It is proposed that this relation is a result of a distribution coefficient dependent on the concentration of Ca in dolomite. Because these dolomites precipitated from water with a Sr2+/Ca2+ ratio similar to that of seawater, distribution coefficient (DSrdolomite) of 0.0118 is calculated for Sr in stoichiometric dolomite. This coefficient increases by about 0.0039 for every additional mol% CaCO3 in monstoichiometric dolomite.These data have three important implications. First, the new DSrdolomite) is substantially lower than previously suggested. Second, a relation has been established among the Sr2+/Ca2+ ratio of dolomite-forming waters, the major element composition of dolomites, and the Sr content of dolomites, allowing the determination of the Sr2+/Ca2+ ratio of fluids involved in the formation of ancient dolomites. Third, some published data sets on dolomites show a similar relation between Sr content and major element composition suggesting that these dolomites may also have formed from seawater. Other data sets deviate from the correlation defined by Little Bahama Bank dolomites, indicating either dolomitization in fluids other than seawater or changes of the Sr2+/Ca2+ ratio of seawater through time. 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.