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Magnetic fabrics in the basal ice of a surge-type glacier
Anisotropy of magnetic susceptibility (AMS) has been shown to provide specific useful information regarding the kinematics of deformation within subglacially deformed sediments. Here we present results from debris‐rich basal glacier ice to examine deformation associated with glacier motion. Basal ic...
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| Published in: | Journal of geophysical research. Earth surface 2013-12, Vol.118 (4), p.2263-2278 |
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| Main Authors: | , , , , , , |
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| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-a4264-c14c56c22f0981582f913259f9f3df63147d7c0dfd4c1c74cc1e703ca676bf63 |
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| container_end_page | 2278 |
| container_issue | 4 |
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| container_title | Journal of geophysical research. Earth surface |
| container_volume | 118 |
| creator | Fleming, Edward J. Lovell, Harold Stevenson, Carl T. E. Petronis, Michael S. Benn, Douglas I. Hambrey, Michael J. Fairchild, Ian J. |
| description | Anisotropy of magnetic susceptibility (AMS) has been shown to provide specific useful information regarding the kinematics of deformation within subglacially deformed sediments. Here we present results from debris‐rich basal glacier ice to examine deformation associated with glacier motion. Basal ice samples were collected from Tunabreen, a polythermal surge‐type glacier in Svalbard. The magnetic fabrics recorded show strong correlation with structures within the ice, such as sheath folds and macroscopic stretching lineations. Thermomagnetic, low‐temperature susceptibility, varying field susceptibility, and isothermal remanent magnetism acquisition experiments reveal that the debris‐rich basal ice samples have a susceptibility and anisotropy dominated by paramagnetic phases within the detrital sediment. Sediment grains entrained within the basal ice are inferred to have rotated into a preferential alignment during deformation associated with flow of the glacier. An up‐glacier directed plunge of magnetic lineations and subtle deviation from bulk glacier flow at the margins highlight the importance of noncoaxial strain during surge propagation. The results suggest that AMS can be used as an ice petrofabric indicator for investigations of glacier deformation and interactions with the bed.
Key Points
Fabrics in basal ice are measured through the novel use of AMS
AMS fabrics reflect the preferential alignment of detrital mineral grains
AMS analysis reveals the kinematics of basal ice deformation |
| doi_str_mv | 10.1002/jgrf.20144 |
| format | article |
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Key Points
Fabrics in basal ice are measured through the novel use of AMS
AMS fabrics reflect the preferential alignment of detrital mineral grains
AMS analysis reveals the kinematics of basal ice deformation</description><identifier>ISSN: 2169-9003</identifier><identifier>EISSN: 2169-9011</identifier><identifier>DOI: 10.1002/jgrf.20144</identifier><language>eng</language><publisher>Hoboken, NJ: Blackwell Publishing Ltd</publisher><subject>Alignment ; Anisotropy ; basal ice ; Deformation ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Fabrics ; Geophysics ; Geophysics: general, magnetic, electric and thermic methods and properties ; Glacial drift ; Glaciers ; Ice ; Internal geophysics ; Kinematics ; Low temperature ; magnetic anisotropy ; Magnetic permeability ; Magnetism ; Marine and continental quaternary ; Sediments ; Snow. Ice. Glaciers ; strain ; structural glaciology ; Surficial geology</subject><ispartof>Journal of geophysical research. Earth surface, 2013-12, Vol.118 (4), p.2263-2278</ispartof><rights>2013. American Geophysical Union. All Rights Reserved.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4264-c14c56c22f0981582f913259f9f3df63147d7c0dfd4c1c74cc1e703ca676bf63</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjgrf.20144$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjgrf.20144$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,11514,27924,27925,46468,46892</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28200135$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Fleming, Edward J.</creatorcontrib><creatorcontrib>Lovell, Harold</creatorcontrib><creatorcontrib>Stevenson, Carl T. E.</creatorcontrib><creatorcontrib>Petronis, Michael S.</creatorcontrib><creatorcontrib>Benn, Douglas I.</creatorcontrib><creatorcontrib>Hambrey, Michael J.</creatorcontrib><creatorcontrib>Fairchild, Ian J.</creatorcontrib><title>Magnetic fabrics in the basal ice of a surge-type glacier</title><title>Journal of geophysical research. Earth surface</title><addtitle>J. Geophys. Res. Earth Surf</addtitle><description>Anisotropy of magnetic susceptibility (AMS) has been shown to provide specific useful information regarding the kinematics of deformation within subglacially deformed sediments. Here we present results from debris‐rich basal glacier ice to examine deformation associated with glacier motion. Basal ice samples were collected from Tunabreen, a polythermal surge‐type glacier in Svalbard. The magnetic fabrics recorded show strong correlation with structures within the ice, such as sheath folds and macroscopic stretching lineations. Thermomagnetic, low‐temperature susceptibility, varying field susceptibility, and isothermal remanent magnetism acquisition experiments reveal that the debris‐rich basal ice samples have a susceptibility and anisotropy dominated by paramagnetic phases within the detrital sediment. Sediment grains entrained within the basal ice are inferred to have rotated into a preferential alignment during deformation associated with flow of the glacier. An up‐glacier directed plunge of magnetic lineations and subtle deviation from bulk glacier flow at the margins highlight the importance of noncoaxial strain during surge propagation. The results suggest that AMS can be used as an ice petrofabric indicator for investigations of glacier deformation and interactions with the bed.
Key Points
Fabrics in basal ice are measured through the novel use of AMS
AMS fabrics reflect the preferential alignment of detrital mineral grains
AMS analysis reveals the kinematics of basal ice deformation</description><subject>Alignment</subject><subject>Anisotropy</subject><subject>basal ice</subject><subject>Deformation</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Fabrics</subject><subject>Geophysics</subject><subject>Geophysics: general, magnetic, electric and thermic methods and properties</subject><subject>Glacial drift</subject><subject>Glaciers</subject><subject>Ice</subject><subject>Internal geophysics</subject><subject>Kinematics</subject><subject>Low temperature</subject><subject>magnetic anisotropy</subject><subject>Magnetic permeability</subject><subject>Magnetism</subject><subject>Marine and continental quaternary</subject><subject>Sediments</subject><subject>Snow. Ice. Glaciers</subject><subject>strain</subject><subject>structural glaciology</subject><subject>Surficial geology</subject><issn>2169-9003</issn><issn>2169-9011</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNpdkFtLAzEQhRdRsGhf_AUBEXzZOpNkb49SbFXqBS34GNJsUlO3uzXZRfvvTS_0wXmZYc53huFE0QXCAAHozWLuzIACcn4U9SimRVwA4vFhBnYa9b1fQKg8rJD2ouJJzmvdWkWMnDmrPLE1aT81mUkvK2KVJo0hkvjOzXXcrleazCuprHbn0YmRldf9fT-LpqO76fA-nryMH4a3k1hymvJYIVdJqig1UOSY5NQUyGhSmMKw0qQMeVZmCkpTcoUq40qhzoApmWbpLOhn0fXu7Mo13532rVhar3RVyVo3nReYQMpyAI4BvfyHLprO1eE5gYHhFDJWBOpqT0mvZGWcrJX1YuXsUrq1oDkFQJYEDnfcj630-qAjiE3YYhO22IYtHsdvo-0UPPHOY32rfw8e6b5EmrEsER_PYzEcjegU3xPxyv4A5Dl_vg</recordid><startdate>201312</startdate><enddate>201312</enddate><creator>Fleming, Edward J.</creator><creator>Lovell, Harold</creator><creator>Stevenson, Carl T. E.</creator><creator>Petronis, Michael S.</creator><creator>Benn, Douglas I.</creator><creator>Hambrey, Michael J.</creator><creator>Fairchild, Ian J.</creator><general>Blackwell Publishing Ltd</general><general>Wiley</general><scope>BSCLL</scope><scope>IQODW</scope><scope>7ST</scope><scope>7TG</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>SOI</scope></search><sort><creationdate>201312</creationdate><title>Magnetic fabrics in the basal ice of a surge-type glacier</title><author>Fleming, Edward J. ; Lovell, Harold ; Stevenson, Carl T. E. ; Petronis, Michael S. ; Benn, Douglas I. ; Hambrey, Michael J. ; Fairchild, Ian J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4264-c14c56c22f0981582f913259f9f3df63147d7c0dfd4c1c74cc1e703ca676bf63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Alignment</topic><topic>Anisotropy</topic><topic>basal ice</topic><topic>Deformation</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Fabrics</topic><topic>Geophysics</topic><topic>Geophysics: general, magnetic, electric and thermic methods and properties</topic><topic>Glacial drift</topic><topic>Glaciers</topic><topic>Ice</topic><topic>Internal geophysics</topic><topic>Kinematics</topic><topic>Low temperature</topic><topic>magnetic anisotropy</topic><topic>Magnetic permeability</topic><topic>Magnetism</topic><topic>Marine and continental quaternary</topic><topic>Sediments</topic><topic>Snow. Ice. Glaciers</topic><topic>strain</topic><topic>structural glaciology</topic><topic>Surficial geology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Fleming, Edward J.</creatorcontrib><creatorcontrib>Lovell, Harold</creatorcontrib><creatorcontrib>Stevenson, Carl T. E.</creatorcontrib><creatorcontrib>Petronis, Michael S.</creatorcontrib><creatorcontrib>Benn, Douglas I.</creatorcontrib><creatorcontrib>Hambrey, Michael J.</creatorcontrib><creatorcontrib>Fairchild, Ian J.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Journal of geophysical research. Earth surface</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Fleming, Edward J.</au><au>Lovell, Harold</au><au>Stevenson, Carl T. E.</au><au>Petronis, Michael S.</au><au>Benn, Douglas I.</au><au>Hambrey, Michael J.</au><au>Fairchild, Ian J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetic fabrics in the basal ice of a surge-type glacier</atitle><jtitle>Journal of geophysical research. Earth surface</jtitle><addtitle>J. Geophys. Res. Earth Surf</addtitle><date>2013-12</date><risdate>2013</risdate><volume>118</volume><issue>4</issue><spage>2263</spage><epage>2278</epage><pages>2263-2278</pages><issn>2169-9003</issn><eissn>2169-9011</eissn><abstract>Anisotropy of magnetic susceptibility (AMS) has been shown to provide specific useful information regarding the kinematics of deformation within subglacially deformed sediments. Here we present results from debris‐rich basal glacier ice to examine deformation associated with glacier motion. Basal ice samples were collected from Tunabreen, a polythermal surge‐type glacier in Svalbard. The magnetic fabrics recorded show strong correlation with structures within the ice, such as sheath folds and macroscopic stretching lineations. Thermomagnetic, low‐temperature susceptibility, varying field susceptibility, and isothermal remanent magnetism acquisition experiments reveal that the debris‐rich basal ice samples have a susceptibility and anisotropy dominated by paramagnetic phases within the detrital sediment. Sediment grains entrained within the basal ice are inferred to have rotated into a preferential alignment during deformation associated with flow of the glacier. An up‐glacier directed plunge of magnetic lineations and subtle deviation from bulk glacier flow at the margins highlight the importance of noncoaxial strain during surge propagation. The results suggest that AMS can be used as an ice petrofabric indicator for investigations of glacier deformation and interactions with the bed.
Key Points
Fabrics in basal ice are measured through the novel use of AMS
AMS fabrics reflect the preferential alignment of detrital mineral grains
AMS analysis reveals the kinematics of basal ice deformation</abstract><cop>Hoboken, NJ</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/jgrf.20144</doi><tpages>16</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 2169-9003 |
| ispartof | Journal of geophysical research. Earth surface, 2013-12, Vol.118 (4), p.2263-2278 |
| issn | 2169-9003 2169-9011 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1506380041 |
| source | Wiley-Blackwell AGU Digital Library; Wiley-Blackwell Read & Publish Collection |
| subjects | Alignment Anisotropy basal ice Deformation Earth sciences Earth, ocean, space Exact sciences and technology External geophysics Fabrics Geophysics Geophysics: general, magnetic, electric and thermic methods and properties Glacial drift Glaciers Ice Internal geophysics Kinematics Low temperature magnetic anisotropy Magnetic permeability Magnetism Marine and continental quaternary Sediments Snow. Ice. Glaciers strain structural glaciology Surficial geology |
| title | Magnetic fabrics in the basal ice of a surge-type glacier |
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