Magmatic tempo of Earth’s youngest exposed plutons as revealed by detrital zircon U-Pb geochronology
Identifieur interne : 000027 ( Ncbi/Merge ); précédent : 000026Magmatic tempo of Earth’s youngest exposed plutons as revealed by detrital zircon U-Pb geochronology
Auteurs : Hisatoshi Ito [Japon] ; Christopher J. Spencer ; Martin Danišík ; Carl W. Hoiland [États-Unis]Source :
- Scientific Reports [ 2045-2322 ] ; 2017.
Abstract
Plutons are formed by protracted crystallization of magma bodies several kilometers deep within the crust. The temporal frequency (i.e. episodicity or ‘tempo’) of pluton formation is often poorly constrained as timescales of pluton formation are largely variable and may be difficult to resolve by traditional dating methods. The Hida Mountain Range of central Japan hosts the youngest exposed plutons on Earth and provides a unique opportunity to assess the temporal and spatial characteristics of pluton emplacement at high temporal resolution. Here we apply U-Pb geochronology to zircon from the Quaternary Kurobegawa Granite and Takidani Granodiorite in the Hida Mountain Range, and from modern river sediments whose fluvial catchments include these plutons in order to reconstruct their formation. The U-Pb data demonstrate that the Kurobegawa pluton experienced two magmatic pulses at ~2.3 Ma and ~0.9 Ma; whereas, to the south, the Takidani pluton experienced only one magmatic pulse at ~1.6 Ma. These data imply that each of these magmatic systems were both spatially and temporally distinct. The apparent ~0.7 Myr age gap between each of the three magmatic pulses potentially constrains the recharge duration of a single pluton within a larger arc plutonic complex.
Url:
DOI: 10.1038/s41598-017-12790-w
PubMed: 28963475
PubMed Central: 5622053
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<volume>7</volume>
<elocation-id>12457</elocation-id>
<history><date date-type="received"><day>6</day>
<month>6</month>
<year>2017</year>
</date>
<date date-type="accepted"><day>15</day>
<month>9</month>
<year>2017</year>
</date>
</history>
<permissions><copyright-statement>© The Author(s) 2017</copyright-statement>
<license license-type="OpenAccess"><license-p><bold>Open Access</bold>
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/4.0/">http://creativecommons.org/licenses/by/4.0/</ext-link>
.</license-p>
</license>
</permissions>
<abstract id="Abs1"><p id="Par1">Plutons are formed by protracted crystallization of magma bodies several kilometers deep within the crust. The temporal frequency (i.e. episodicity or ‘tempo’) of pluton formation is often poorly constrained as timescales of pluton formation are largely variable and may be difficult to resolve by traditional dating methods. The Hida Mountain Range of central Japan hosts the youngest exposed plutons on Earth and provides a unique opportunity to assess the temporal and spatial characteristics of pluton emplacement at high temporal resolution. Here we apply U-Pb geochronology to zircon from the Quaternary Kurobegawa Granite and Takidani Granodiorite in the Hida Mountain Range, and from modern river sediments whose fluvial catchments include these plutons in order to reconstruct their formation. The U-Pb data demonstrate that the Kurobegawa pluton experienced two magmatic pulses at ~2.3 Ma and ~0.9 Ma; whereas, to the south, the Takidani pluton experienced only one magmatic pulse at ~1.6 Ma. These data imply that each of these magmatic systems were both spatially and temporally distinct. The apparent ~0.7 Myr age gap between each of the three magmatic pulses potentially constrains the recharge duration of a single pluton within a larger arc plutonic complex.</p>
</abstract>
<custom-meta-group><custom-meta><meta-name>issue-copyright-statement</meta-name>
<meta-value>© The Author(s) 2017</meta-value>
</custom-meta>
</custom-meta-group>
</article-meta>
</front>
</pmc>
<affiliations><list><country><li>Japon</li>
<li>États-Unis</li>
</country>
<region><li>Californie</li>
</region>
</list>
<tree><noCountry><name sortKey="Danisik, Martin" sort="Danisik, Martin" uniqKey="Danisik M" first="Martin" last="Danišík">Martin Danišík</name>
<name sortKey="Spencer, Christopher J" sort="Spencer, Christopher J" uniqKey="Spencer C" first="Christopher J." last="Spencer">Christopher J. Spencer</name>
</noCountry>
<country name="Japon"><noRegion><name sortKey="Ito, Hisatoshi" sort="Ito, Hisatoshi" uniqKey="Ito H" first="Hisatoshi" last="Ito">Hisatoshi Ito</name>
</noRegion>
</country>
<country name="États-Unis"><region name="Californie"><name sortKey="Hoiland, Carl W" sort="Hoiland, Carl W" uniqKey="Hoiland C" first="Carl W." last="Hoiland">Carl W. Hoiland</name>
</region>
</country>
</tree>
</affiliations>
</record>
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