Schmidt hammer exposure-age dating (SHD) of late Quaternary fluvial terraces in New Zealand
ABSTRACT Schmidt hammer (SH) R‐values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R‐values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence...
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| Veröffentlicht in: | Earth surface processes and landforms 2013-12, Vol.38 (15), p.1838-1850 |
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| container_title | Earth surface processes and landforms |
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| creator | Stahl, Timothy Winkler, Stefan Quigley, Mark Bebbington, Mark Duffy, Brendan Duke, Daniel |
| description | ABSTRACT
Schmidt hammer (SH) R‐values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R‐values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence terrace ages to derive SH R‐value chronofunctions for greywacke clasts from four distinct locations. Our results show that different weathering rates affect the form of the SH R‐value versus Age curve, however a fundamental dependency between the two remains constant over timescales ranging from 102 to 105 years. Power law scaling constants suggest changes in clast weathering rates are primarily affected by climatic (precipitation and temperature) and sedimentologic variables (source terrane petrology). Age uncertainties of ~22% of the surface age suggest that Schmidt hammer exposure‐age dating (SHD) is a reliable calibrated‐age dating technique for fluvial terraces. Copyright © 2013 John Wiley & Sons, Ltd. |
| doi_str_mv | 10.1002/esp.3427 |
| format | Article |
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Schmidt hammer (SH) R‐values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R‐values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence terrace ages to derive SH R‐value chronofunctions for greywacke clasts from four distinct locations. Our results show that different weathering rates affect the form of the SH R‐value versus Age curve, however a fundamental dependency between the two remains constant over timescales ranging from 102 to 105 years. Power law scaling constants suggest changes in clast weathering rates are primarily affected by climatic (precipitation and temperature) and sedimentologic variables (source terrane petrology). Age uncertainties of ~22% of the surface age suggest that Schmidt hammer exposure‐age dating (SHD) is a reliable calibrated‐age dating technique for fluvial terraces. Copyright © 2013 John Wiley & Sons, Ltd.</description><identifier>ISSN: 0197-9337</identifier><identifier>EISSN: 1096-9837</identifier><identifier>DOI: 10.1002/esp.3427</identifier><language>eng</language><publisher>Bognor Regis: Blackwell Publishing Ltd</publisher><subject>Age ; Dating ; Dating techniques ; exposure-age dating ; fluvial terrace ; Hammers ; Mathematical analysis ; Mathematical models ; outwash plain ; Schmidt hammer ; Terraces ; Weathering</subject><ispartof>Earth surface processes and landforms, 2013-12, Vol.38 (15), p.1838-1850</ispartof><rights>Copyright © 2013 John Wiley & Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4207-f120688fd2bd749dc3ba4259c7c1fee3e6a8437608ba974ab2ddf187ca74b7cd3</citedby><cites>FETCH-LOGICAL-a4207-f120688fd2bd749dc3ba4259c7c1fee3e6a8437608ba974ab2ddf187ca74b7cd3</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%2Fesp.3427$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fesp.3427$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,778,782,1414,27911,27912,45561,45562</link.rule.ids></links><search><creatorcontrib>Stahl, Timothy</creatorcontrib><creatorcontrib>Winkler, Stefan</creatorcontrib><creatorcontrib>Quigley, Mark</creatorcontrib><creatorcontrib>Bebbington, Mark</creatorcontrib><creatorcontrib>Duffy, Brendan</creatorcontrib><creatorcontrib>Duke, Daniel</creatorcontrib><title>Schmidt hammer exposure-age dating (SHD) of late Quaternary fluvial terraces in New Zealand</title><title>Earth surface processes and landforms</title><addtitle>Earth Surf. Process. Landforms</addtitle><description>ABSTRACT
Schmidt hammer (SH) R‐values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R‐values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence terrace ages to derive SH R‐value chronofunctions for greywacke clasts from four distinct locations. Our results show that different weathering rates affect the form of the SH R‐value versus Age curve, however a fundamental dependency between the two remains constant over timescales ranging from 102 to 105 years. Power law scaling constants suggest changes in clast weathering rates are primarily affected by climatic (precipitation and temperature) and sedimentologic variables (source terrane petrology). Age uncertainties of ~22% of the surface age suggest that Schmidt hammer exposure‐age dating (SHD) is a reliable calibrated‐age dating technique for fluvial terraces. 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Schmidt hammer (SH) R‐values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R‐values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence terrace ages to derive SH R‐value chronofunctions for greywacke clasts from four distinct locations. Our results show that different weathering rates affect the form of the SH R‐value versus Age curve, however a fundamental dependency between the two remains constant over timescales ranging from 102 to 105 years. Power law scaling constants suggest changes in clast weathering rates are primarily affected by climatic (precipitation and temperature) and sedimentologic variables (source terrane petrology). Age uncertainties of ~22% of the surface age suggest that Schmidt hammer exposure‐age dating (SHD) is a reliable calibrated‐age dating technique for fluvial terraces. Copyright © 2013 John Wiley & Sons, Ltd.</abstract><cop>Bognor Regis</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/esp.3427</doi><tpages>13</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Age Dating Dating techniques exposure-age dating fluvial terrace Hammers Mathematical analysis Mathematical models outwash plain Schmidt hammer Terraces Weathering |
| title | Schmidt hammer exposure-age dating (SHD) of late Quaternary fluvial terraces in New Zealand |
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