{"id":44,"date":"2022-07-13T17:38:23","date_gmt":"2022-07-13T17:38:23","guid":{"rendered":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/chapter\/fluorine-in-metamorphic-rocks\/"},"modified":"2022-07-18T19:10:09","modified_gmt":"2022-07-18T19:10:09","slug":"fluorine-in-metamorphic-rocks","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/chapter\/fluorine-in-metamorphic-rocks\/","title":{"raw":"5.3  Fluorine in Metamorphic Rocks","rendered":"5.3  Fluorine in Metamorphic Rocks"},"content":{"raw":"<div class=\"fluorine-in-metamorphic-rocks\">\r\n<p class=\"import-Normal\">Metamorphic rocks cover a broad spectrum of lithologies that include metamorphosed igneous rocks, metamorphosed sediments, and hydrothermally altered rocks. Rocks that have been hydrothermally altered are more likely to have higher concentrations of F but might also have large F gradients in different parts of the rock. Many metamorphic rocks contain micas and amphiboles with a hydroxide lattice site that often contains some substituted F. However, if the rock contains high concentrations of F in the hydroxide site, it is also likely to contain some fluorite and fluorapatite which is usually more soluble. Examples of high groundwater F in metamorphic aquifers are scarce, partly because these rock types often do not provide a reliable water supply because of low permeability unless highly fractured. Chae and others (2007) reported high F concentrations in aquifers in South Korea where metamorphic rocks seem to be a greater source rock than other types, with granitoids a close second.<\/p>\r\n\r\n<\/div>","rendered":"<div class=\"fluorine-in-metamorphic-rocks\">\n<p class=\"import-Normal\">Metamorphic rocks cover a broad spectrum of lithologies that include metamorphosed igneous rocks, metamorphosed sediments, and hydrothermally altered rocks. Rocks that have been hydrothermally altered are more likely to have higher concentrations of F but might also have large F gradients in different parts of the rock. Many metamorphic rocks contain micas and amphiboles with a hydroxide lattice site that often contains some substituted F. However, if the rock contains high concentrations of F in the hydroxide site, it is also likely to contain some fluorite and fluorapatite which is usually more soluble. Examples of high groundwater F in metamorphic aquifers are scarce, partly because these rock types often do not provide a reliable water supply because of low permeability unless highly fractured. Chae and others (2007) reported high F concentrations in aquifers in South Korea where metamorphic rocks seem to be a greater source rock than other types, with granitoids a close second.<\/p>\n<\/div>\n","protected":false},"author":1,"menu_order":8,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-44","chapter","type-chapter","status-publish","hentry"],"part":124,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapters\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":2,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapters\/44\/revisions"}],"predecessor-version":[{"id":264,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapters\/44\/revisions\/264"}],"part":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/parts\/124"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapters\/44\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/pressbooks\/v2\/chapter-type?post=44"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/wp\/v2\/contributor?post=44"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/fluoride-in-groundwater\/wp-json\/wp\/v2\/license?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}