{"title":"The Solubility of CaF2 in Seawater of Normal and Increased Salinity (Associated with Genesis of Fluorite in Sedimentary Rocks)","authors":"A. V. Savenko, V. S. Savenko","doi":"10.3103/s0145875223060145","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The solubility of crystalline and precipitated calcium fluoride in seawater and brines of the first stages of its evaporative concentration (before the beginning of gypsum and halite setting) has been experimentally studied. It is established that in the entire studied range of salinity, seawater and its derivatives are strongly undersaturated in calcium fluoride, which excludes its spontaneous precipitation in drying isolated sea basins. A necessary condition for the formation of sedimentary fluorite is the entry of significant amounts of dissolved fluorine from external sources, which can be river runoff, volcanic emanations, and hydrothermal solutions, into drying sea basins.</p>","PeriodicalId":44391,"journal":{"name":"Moscow University Geology Bulletin","volume":"35 1","pages":""},"PeriodicalIF":0.3000,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Moscow University Geology Bulletin","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3103/s0145875223060145","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The solubility of crystalline and precipitated calcium fluoride in seawater and brines of the first stages of its evaporative concentration (before the beginning of gypsum and halite setting) has been experimentally studied. It is established that in the entire studied range of salinity, seawater and its derivatives are strongly undersaturated in calcium fluoride, which excludes its spontaneous precipitation in drying isolated sea basins. A necessary condition for the formation of sedimentary fluorite is the entry of significant amounts of dissolved fluorine from external sources, which can be river runoff, volcanic emanations, and hydrothermal solutions, into drying sea basins.
期刊介绍：
Moscow University Geology Bulletin is the journal that mainly publishes scientific articles, short reports of graduate students, and reviews. Publications made by the members of the Faculty of Geology of the Moscow State University and their collaborators are published. Publications encompass all branches of geology.
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