Active tectonics west of New Zealand's Alpine Fault: South Westland Fault Zone activity shows Australian Plate instability
The 300 km long South Westland Fault Zone (SWFZ) is within the footwall of the Central Alpine Fault (
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| Veröffentlicht in: | Geophysical research letters 2016-04, Vol.43 (7), p.3120-3125 |
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| container_title | Geophysical research letters |
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| creator | De Pascale, Gregory P. Chandler‐Yates, Nicholas Dela Pena, Federico Wilson, Pam May, Elijah Twiss, Amber Cheng, Che |
| description | The 300 km long South Westland Fault Zone (SWFZ) is within the footwall of the Central Alpine Fault ( |
| doi_str_mv | 10.1002/2016GL068233 |
| format | Article |
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Key Points
Newly observed thrust faulting shows the South Westland Fault Zone (SFWZ) is an active seismogenic structure
Large but infrequent earthquakes (at least Mw 6.8) with the most recent rupture post −12.1 ± 1.7 ka based on OSL dating
Intra‐Australian Plate faulting shows that key structures remain uncharacterized in areas with rainforest cover</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL068233</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Alpine Fault ; CPT ; Dating ; Displacement ; Earthquakes ; Fault lines ; Faults ; Footwalls ; Holocene ; New Zealand ; Plate tectonics ; Plates (tectonics) ; Pleistocene ; Rupture ; Seismic activity ; Seismic response ; Seismology ; South Westland Fault Zone ; Stratigraphy ; Thrust ; uplift ; Westland Basin</subject><ispartof>Geophysical research letters, 2016-04, Vol.43 (7), p.3120-3125</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4655-6b9a3d2f74737b0d59ee279f829c419912dc9e98066a5b39d609f7be82cf6f43</citedby><cites>FETCH-LOGICAL-a4655-6b9a3d2f74737b0d59ee279f829c419912dc9e98066a5b39d609f7be82cf6f43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2F2016GL068233$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2F2016GL068233$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,781,785,1418,1434,11519,27929,27930,45579,45580,46414,46473,46838,46897</link.rule.ids></links><search><creatorcontrib>De Pascale, Gregory P.</creatorcontrib><creatorcontrib>Chandler‐Yates, Nicholas</creatorcontrib><creatorcontrib>Dela Pena, Federico</creatorcontrib><creatorcontrib>Wilson, Pam</creatorcontrib><creatorcontrib>May, Elijah</creatorcontrib><creatorcontrib>Twiss, Amber</creatorcontrib><creatorcontrib>Cheng, Che</creatorcontrib><title>Active tectonics west of New Zealand's Alpine Fault: South Westland Fault Zone activity shows Australian Plate instability</title><title>Geophysical research letters</title><description>The 300 km long South Westland Fault Zone (SWFZ) is within the footwall of the Central Alpine Fault (<20 km away) and has 3500 m of dip‐slip displacement, but it has been unknown if the fault is active. Here the first evidence for SWFZ thrust faulting in the “stable” Australian Plate is shown with cumulative dip‐slip displacements up to 5.9 m (with 3 m throw) on Pleistocene and Holocene sediments and gentle hanging wall anticlinal folding. Cone penetration test (CPT) stratigraphy shows repeated sequences within the fault scarp (consistent with thrusting). Optically stimulated luminescence (OSL) dating constrains the most recent rupture post‐12.1 ± 1.7 ka with evidence for three to four events during earthquakes of at least Mw 6.8. This study shows significant deformation is accommodated on poorly characterized Australian Plate structures northwest of the Alpine Fault and demonstrates that major active and seismogenic structures remain uncharacterized in densely forested regions on Earth.
Key Points
Newly observed thrust faulting shows the South Westland Fault Zone (SFWZ) is an active seismogenic structure
Large but infrequent earthquakes (at least Mw 6.8) with the most recent rupture post −12.1 ± 1.7 ka based on OSL dating
Intra‐Australian Plate faulting shows that key structures remain uncharacterized in areas with rainforest cover</description><subject>Alpine Fault</subject><subject>CPT</subject><subject>Dating</subject><subject>Displacement</subject><subject>Earthquakes</subject><subject>Fault lines</subject><subject>Faults</subject><subject>Footwalls</subject><subject>Holocene</subject><subject>New Zealand</subject><subject>Plate tectonics</subject><subject>Plates (tectonics)</subject><subject>Pleistocene</subject><subject>Rupture</subject><subject>Seismic activity</subject><subject>Seismic response</subject><subject>Seismology</subject><subject>South Westland Fault Zone</subject><subject>Stratigraphy</subject><subject>Thrust</subject><subject>uplift</subject><subject>Westland Basin</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0UtrGzEQAGARGqjj9NYfIMihPcTJ6LF69GZM7ARMElpDwZdFu6vFMsrKXWlrnF8fGfdQegg9SWg-DfNA6DOBGwJAbykQsViCUJSxMzQimvOJApAf0AhA5zuV4iO6iHELAAwYGaHXaZ3cb4uTrVPoXB3x3saEQ4sf7R6vrfGma75EPPU711k8N4NP3_CPMKQN_pnlMXx6xeuQgTmmc-mA4ybs87chpt54Zzr87E2y2HUxmcr5TC7ReWt8tJ_-nGO0mt-tZveT5dPiYTZdTgwXRTERlTasoa3kkskKmkJbS6VuFdU1J1oT2tTaagVCmKJiuhGgW1lZRetWtJyN0ddT2l0ffg255PLFxdr6XLkNQyyJAsWE0lz_F82DLiTJ9Oofug1D3-U-SiIVL7SUWmZ1fVJ1H2LsbVvuevdi-kNJoDyurPx7ZZnTE987bw_v2nLxfVlwCgV7A-31lss</recordid><startdate>20160416</startdate><enddate>20160416</enddate><creator>De Pascale, Gregory P.</creator><creator>Chandler‐Yates, Nicholas</creator><creator>Dela Pena, Federico</creator><creator>Wilson, Pam</creator><creator>May, Elijah</creator><creator>Twiss, Amber</creator><creator>Cheng, Che</creator><general>John Wiley & Sons, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</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>7UA</scope><scope>C1K</scope></search><sort><creationdate>20160416</creationdate><title>Active tectonics west of New Zealand's Alpine Fault: South Westland Fault Zone activity shows Australian Plate instability</title><author>De Pascale, Gregory P. ; Chandler‐Yates, Nicholas ; Dela Pena, Federico ; Wilson, Pam ; May, Elijah ; Twiss, Amber ; Cheng, Che</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4655-6b9a3d2f74737b0d59ee279f829c419912dc9e98066a5b39d609f7be82cf6f43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Alpine Fault</topic><topic>CPT</topic><topic>Dating</topic><topic>Displacement</topic><topic>Earthquakes</topic><topic>Fault lines</topic><topic>Faults</topic><topic>Footwalls</topic><topic>Holocene</topic><topic>New Zealand</topic><topic>Plate tectonics</topic><topic>Plates (tectonics)</topic><topic>Pleistocene</topic><topic>Rupture</topic><topic>Seismic activity</topic><topic>Seismic response</topic><topic>Seismology</topic><topic>South Westland Fault Zone</topic><topic>Stratigraphy</topic><topic>Thrust</topic><topic>uplift</topic><topic>Westland Basin</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>De Pascale, Gregory P.</creatorcontrib><creatorcontrib>Chandler‐Yates, Nicholas</creatorcontrib><creatorcontrib>Dela Pena, Federico</creatorcontrib><creatorcontrib>Wilson, Pam</creatorcontrib><creatorcontrib>May, Elijah</creatorcontrib><creatorcontrib>Twiss, Amber</creatorcontrib><creatorcontrib>Cheng, Che</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</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>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>De Pascale, Gregory P.</au><au>Chandler‐Yates, Nicholas</au><au>Dela Pena, Federico</au><au>Wilson, Pam</au><au>May, Elijah</au><au>Twiss, Amber</au><au>Cheng, Che</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Active tectonics west of New Zealand's Alpine Fault: South Westland Fault Zone activity shows Australian Plate instability</atitle><jtitle>Geophysical research letters</jtitle><date>2016-04-16</date><risdate>2016</risdate><volume>43</volume><issue>7</issue><spage>3120</spage><epage>3125</epage><pages>3120-3125</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>The 300 km long South Westland Fault Zone (SWFZ) is within the footwall of the Central Alpine Fault (<20 km away) and has 3500 m of dip‐slip displacement, but it has been unknown if the fault is active. Here the first evidence for SWFZ thrust faulting in the “stable” Australian Plate is shown with cumulative dip‐slip displacements up to 5.9 m (with 3 m throw) on Pleistocene and Holocene sediments and gentle hanging wall anticlinal folding. Cone penetration test (CPT) stratigraphy shows repeated sequences within the fault scarp (consistent with thrusting). Optically stimulated luminescence (OSL) dating constrains the most recent rupture post‐12.1 ± 1.7 ka with evidence for three to four events during earthquakes of at least Mw 6.8. This study shows significant deformation is accommodated on poorly characterized Australian Plate structures northwest of the Alpine Fault and demonstrates that major active and seismogenic structures remain uncharacterized in densely forested regions on Earth.
Key Points
Newly observed thrust faulting shows the South Westland Fault Zone (SFWZ) is an active seismogenic structure
Large but infrequent earthquakes (at least Mw 6.8) with the most recent rupture post −12.1 ± 1.7 ka based on OSL dating
Intra‐Australian Plate faulting shows that key structures remain uncharacterized in areas with rainforest cover</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL068233</doi><tpages>6</tpages></addata></record> |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library All Journals |
| subjects | Alpine Fault CPT Dating Displacement Earthquakes Fault lines Faults Footwalls Holocene New Zealand Plate tectonics Plates (tectonics) Pleistocene Rupture Seismic activity Seismic response Seismology South Westland Fault Zone Stratigraphy Thrust uplift Westland Basin |
| title | Active tectonics west of New Zealand's Alpine Fault: South Westland Fault Zone activity shows Australian Plate instability |
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