{"id":321,"date":"2023-10-05T21:54:28","date_gmt":"2023-10-05T21:54:28","guid":{"rendered":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/chapter\/box-2-properties-of-slip-bands\/"},"modified":"2023-11-08T17:11:26","modified_gmt":"2023-11-08T17:11:26","slug":"box-2-properties-of-slip-bands","status":"publish","type":"chapter","link":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/chapter\/box-2-properties-of-slip-bands\/","title":{"raw":"Box 2 Properties of Slip Bands\u200c","rendered":"Box 2 Properties of Slip Bands\u200c"},"content":{"raw":"Scanning electron microscopy analyses of slip band infill along three transects showed strong peaks in Fe-rich mineral cement (goethite\/hematite mixture) and a corresponding decrease in Si- and O<span class=\"s30\">2<\/span>-rich mineral cement. The X-ray diffraction analyses of the samples with a whitish infill showed a strong peak corresponding to amorphous silica, which is believed to be opal. Opal as well as goethite\/hematite infill markedly reduce the porosity and permeability of slip bands. Permeability values of slip bands partially filled with hematite\/goethite cement were computed using thin-section image analyses in conjunction with a computational rock physics-based algorithm called PETS (permeability estimation from thin sections) and the Lattice-Boltzmann method (Keehm et al., 2004). Slip band permeabilities are commonly expressed in millidarcies (mD) and are estimated to be in the range of 7\u00d710<span class=\"s43\">-6 <\/span>mD to 3.9 mD. Partially filled slip band permeabilities range from 2.8 mD to 150 mD, whereas open slip surfaces have permeabilities as high as 5\u00d710<span class=\"s44\">6<\/span> mD.\r\n<p class=\"s45\" style=\"text-align: left;\"><a href=\"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/chapter\/6-4-fault-zones\/\"><strong>Return to where text linked to Box 2<\/strong><\/a><\/p>\r\n&nbsp;","rendered":"<p>Scanning electron microscopy analyses of slip band infill along three transects showed strong peaks in Fe-rich mineral cement (goethite\/hematite mixture) and a corresponding decrease in Si- and O<span class=\"s30\">2<\/span>-rich mineral cement. The X-ray diffraction analyses of the samples with a whitish infill showed a strong peak corresponding to amorphous silica, which is believed to be opal. Opal as well as goethite\/hematite infill markedly reduce the porosity and permeability of slip bands. Permeability values of slip bands partially filled with hematite\/goethite cement were computed using thin-section image analyses in conjunction with a computational rock physics-based algorithm called PETS (permeability estimation from thin sections) and the Lattice-Boltzmann method (Keehm et al., 2004). Slip band permeabilities are commonly expressed in millidarcies (mD) and are estimated to be in the range of 7\u00d710<span class=\"s43\">-6 <\/span>mD to 3.9 mD. Partially filled slip band permeabilities range from 2.8 mD to 150 mD, whereas open slip surfaces have permeabilities as high as 5\u00d710<span class=\"s44\">6<\/span> mD.<\/p>\n<p class=\"s45\" style=\"text-align: left;\"><a href=\"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/chapter\/6-4-fault-zones\/\"><strong>Return to where text linked to Box 2<\/strong><\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"author":6,"menu_order":18,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-321","chapter","type-chapter","status-publish","hentry"],"part":461,"_links":{"self":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapters\/321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/wp\/v2\/users\/6"}],"version-history":[{"count":6,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapters\/321\/revisions"}],"predecessor-version":[{"id":629,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapters\/321\/revisions\/629"}],"part":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/parts\/461"}],"metadata":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapters\/321\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/wp\/v2\/media?parent=321"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/pressbooks\/v2\/chapter-type?post=321"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/wp\/v2\/contributor?post=321"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/books.gw-project.org\/fractures-and-faults-in-sandstone-and-sandstone-shale-mudstone-sequences\/wp-json\/wp\/v2\/license?post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}