Evolution and interaction of migrating cross-are volcanism and backare rifting : An example from the southern Havre Trough (35°S′-37°S)
Identifieur interne : 001F69 ( Main/Exploration ); précédent : 001F68; suivant : 001F70Evolution and interaction of migrating cross-are volcanism and backare rifting : An example from the southern Havre Trough (35°S′-37°S)
Auteurs : I. C. Wright [Nouvelle-Zélande] ; L. M. Parson [Royaume-Uni] ; J. A. Gamble [Nouvelle-Zélande]Source :
- Journal of geophysical research [ 0148-0227 ] ; 1996.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Migration.
English descriptors
- KwdEn :
Abstract
The active southern Havre Trough (35°20' - 37°S) backarc basin is interpreted to form from the evolution and interaction of migrating cross-arc magmatism, and the progressive development of longitudinal rift grabens. The proposed migration of the proto-Kermadec arc front from the Colville arc at ∼ 5 Ma to the active Kermadec arc margin is recorded by the construction of arc edifices trailed across the intervening, and contemporaneously rifting, backarc complex. Migration trails are identified for at least four arc volcano sources. The Rumble V arc migration trail is the most prominent, forming a continuous, high-standing, magmatic arc ridge. These postulated arc trails segment the backarc region and initially limit rift development to the intervening proto-arc crust blocks. Early rifling between the arc volcanoes forms fully developed rift grabens which, with progressive basin widening, propagate longitudinally across the trails of migrating constructional arc magmatism. A model of the balance between rates of constructional arc magma production MR and destructive back-arc (rifting) extension VF is proposed. When VE is high, MR is insufficient to keep abreast of destructional rifting, resulting in small, isolated arc massifs quickly dismembered by rifting. Conversely, when VE is low, MR is sufficiently greater than rifting to produce a continuous, high-standing cross-arc ridge which segments longitudinal rift development. Migrating arc magmatism will be best observed, and preserved, in rifting backarc basins when MR is > 600 km3 m.y.-1 100 km-1 of plate boundary and VE is < 25 mm a-1.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Evolution and interaction of migrating cross-are volcanism and backare rifting : An example from the southern Havre Trough (35°S′-37°S)</title><author><name sortKey="Wright, I C" sort="Wright, I C" uniqKey="Wright I" first="I. C." last="Wright">I. C. Wright</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>New Zealand Oceanographic Institute, National Institute of Water and Atmospheric Research</s1><s2>Wellington</s2><s3>NZL</s3><sZ>1 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Wellington</wicri:noRegion></affiliation></author><author><name sortKey="Parson, L M" sort="Parson, L M" uniqKey="Parson L" first="L. M." last="Parson">L. M. Parson</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Southampton Oceanography Centre</s1><s2>Southampton</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Southampton Oceanography Centre</wicri:noRegion></affiliation></author><author><name sortKey="Gamble, J A" sort="Gamble, J A" uniqKey="Gamble J" first="J. A." last="Gamble">J. A. Gamble</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Geology, Research School of Earth Sciences, Victoria University of Wellington</s1><s2>Wellingon</s2><s3>NZL</s3><sZ>3 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Wellingon</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">97-0014305</idno><date when="1996">1996</date><idno type="stanalyst">PASCAL 97-0014305 INIST</idno><idno type="RBID">Pascal:97-0014305</idno><idno type="wicri:Area/PascalFrancis/Corpus">000454</idno><idno type="wicri:Area/PascalFrancis/Curation">000701</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000475</idno><idno type="wicri:doubleKey">0148-0227:1996:Wright I:evolution:and:interaction</idno><idno type="wicri:Area/Main/Merge">002025</idno><idno type="wicri:Area/Main/Curation">001F69</idno><idno type="wicri:Area/Main/Exploration">001F69</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Evolution and interaction of migrating cross-are volcanism and backare rifting : An example from the southern Havre Trough (35°S′-37°S)</title><author><name sortKey="Wright, I C" sort="Wright, I C" uniqKey="Wright I" first="I. C." last="Wright">I. C. Wright</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>New Zealand Oceanographic Institute, National Institute of Water and Atmospheric Research</s1><s2>Wellington</s2><s3>NZL</s3><sZ>1 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Wellington</wicri:noRegion></affiliation></author><author><name sortKey="Parson, L M" sort="Parson, L M" uniqKey="Parson L" first="L. M." last="Parson">L. M. Parson</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Southampton Oceanography Centre</s1><s2>Southampton</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Southampton Oceanography Centre</wicri:noRegion></affiliation></author><author><name sortKey="Gamble, J A" sort="Gamble, J A" uniqKey="Gamble J" first="J. A." last="Gamble">J. A. Gamble</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Geology, Research School of Earth Sciences, Victoria University of Wellington</s1><s2>Wellingon</s2><s3>NZL</s3><sZ>3 aut.</sZ></inist:fA14><country>Nouvelle-Zélande</country><wicri:noRegion>Wellingon</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of geophysical research</title><title level="j" type="abbreviated">J. geophys. res.</title><idno type="ISSN">0148-0227</idno><imprint><date when="1996">1996</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of geophysical research</title><title level="j" type="abbreviated">J. geophys. res.</title><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Australian Plate</term><term>Kermadec Trench</term><term>North Island</term><term>Pacific Plate</term><term>Side scan sonar</term><term>active margins</term><term>back-arc basins</term><term>bathymetry</term><term>grabens</term><term>imagery</term><term>magmatism</term><term>migration</term><term>rifting</term><term>seismic surveys</term><term>subduction zones</term><term>volcanic arcs</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Bassin arrière arc</term><term>Arc volcanique</term><term>Fosse Kermadec</term><term>Marge active</term><term>Zone subduction</term><term>Magmatisme</term><term>Graben</term><term>Plaque Australienne</term><term>Plaque Pacifique</term><term>Nouvelle Zélande Ile Nord</term><term>Bathymétrie</term><term>Levé sismique</term><term>Imagerie</term><term>Rifting</term><term>Migration</term><term>Sonar vision latérale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Migration</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The active southern Havre Trough (35°20' - 37°S) backarc basin is interpreted to form from the evolution and interaction of migrating cross-arc magmatism, and the progressive development of longitudinal rift grabens. The proposed migration of the proto-Kermadec arc front from the Colville arc at ∼ 5 Ma to the active Kermadec arc margin is recorded by the construction of arc edifices trailed across the intervening, and contemporaneously rifting, backarc complex. Migration trails are identified for at least four arc volcano sources. The Rumble V arc migration trail is the most prominent, forming a continuous, high-standing, magmatic arc ridge. These postulated arc trails segment the backarc region and initially limit rift development to the intervening proto-arc crust blocks. Early rifling between the arc volcanoes forms fully developed rift grabens which, with progressive basin widening, propagate longitudinally across the trails of migrating constructional arc magmatism. A model of the balance between rates of constructional arc magma production M<sub>R</sub> and destructive back-arc (rifting) extension V<sub>F</sub> is proposed. When V<sub>E</sub> is high, M<sub>R</sub> is insufficient to keep abreast of destructional rifting, resulting in small, isolated arc massifs quickly dismembered by rifting. Conversely, when V<sub>E</sub> is low, M<sub>R</sub> is sufficiently greater than rifting to produce a continuous, high-standing cross-arc ridge which segments longitudinal rift development. Migrating arc magmatism will be best observed, and preserved, in rifting backarc basins when M<sub>R</sub> is > 600 km<sup>3</sup> m.y.<sup>-1</sup> 100 km<sup>-1</sup> of plate boundary and V<sub>E</sub> is < 25 mm a<sup>-1</sup>.</div></front></TEI><affiliations><list><country><li>Nouvelle-Zélande</li><li>Royaume-Uni</li></country></list><tree><country name="Nouvelle-Zélande"><noRegion><name sortKey="Wright, I C" sort="Wright, I C" uniqKey="Wright I" first="I. C." last="Wright">I. C. Wright</name></noRegion><name sortKey="Gamble, J A" sort="Gamble, J A" uniqKey="Gamble J" first="J. A." last="Gamble">J. A. Gamble</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Parson, L M" sort="Parson, L M" uniqKey="Parson L" first="L. M." last="Parson">L. M. Parson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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