Relationship between eruption volume and neodymium isotopic composition at Unzen volcano
SILICA-rich lavas, erupted at island-arc or continental volcanoes, are often produced by a complex process involving the assimilation of crust into a crystallizing, mantle-derived basaltic magma 1 . The different strontium, neodymium and oxygen isotopic compositions of mantle-derived magmas and cont...
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| Veröffentlicht in: | Nature (London) 1993-04, Vol.362 (6423), p.831-834 |
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| creator | Chen, Chang-Hwa DePaolo, Donald J. Nakada, Setsuya Shieh, Yuch-Ning |
| description | SILICA-rich lavas, erupted at island-arc or continental volcanoes, are often produced by a complex process involving the assimilation of crust into a crystallizing, mantle-derived basaltic magma
1
. The different strontium, neodymium and oxygen isotopic compositions of mantle-derived magmas and continental crust provide a powerful method for tracing the different contributions to continental silicic magmas, and for understanding the parameters controlling the composition and volume of erupted magma
1–4
. In the large rhyolite eruptive centres of the western United States, the largest-volume, explosive rhyolite eruptions have more mantle-like Nd isotope ratios than other silicic lavas from the same centre
2–4
, a relationship that has been interpreted as reflecting increased influx of mantle-derived basaltic magma to a crustal magma chamber before large-volume eruptions
1
. Here we report isotope data for lavas from Unzen volcano, which suggest a similar relationship: the Nd isotope composition is more mantle-like in three larger-volume dacite eruptions (>0.1 km
3
) than in one small-volume (0.02 km
3
) eruption. We accordingly suggest that, in small-volume systems like Unzen, where the timescales for magma-chamber evolution are of the order of decades, isotope data such as those presented here might be used in volcanic hazard evaluation. |
| doi_str_mv | 10.1038/362831a0 |
| format | Article |
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1
. The different strontium, neodymium and oxygen isotopic compositions of mantle-derived magmas and continental crust provide a powerful method for tracing the different contributions to continental silicic magmas, and for understanding the parameters controlling the composition and volume of erupted magma
1–4
. In the large rhyolite eruptive centres of the western United States, the largest-volume, explosive rhyolite eruptions have more mantle-like Nd isotope ratios than other silicic lavas from the same centre
2–4
, a relationship that has been interpreted as reflecting increased influx of mantle-derived basaltic magma to a crustal magma chamber before large-volume eruptions
1
. Here we report isotope data for lavas from Unzen volcano, which suggest a similar relationship: the Nd isotope composition is more mantle-like in three larger-volume dacite eruptions (>0.1 km
3
) than in one small-volume (0.02 km
3
) eruption. We accordingly suggest that, in small-volume systems like Unzen, where the timescales for magma-chamber evolution are of the order of decades, isotope data such as those presented here might be used in volcanic hazard evaluation.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/362831a0</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Crystalline rocks ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Geological hazards ; Humanities and Social Sciences ; Igneous and metamorphic rocks petrology, volcanic processes, magmas ; Isotope geochemistry ; Isotope geochemistry. Geochronology ; Isotopes ; Lava ; letter ; multidisciplinary ; Neodymium ; Science ; Science (multidisciplinary) ; Volcanoes</subject><ispartof>Nature (London), 1993-04, Vol.362 (6423), p.831-834</ispartof><rights>Springer Nature Limited 1993</rights><rights>1993 INIST-CNRS</rights><rights>Copyright Macmillan Journals Ltd. Apr 29, 1993</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a435t-425356f1e4f338b5b2f732259b94f4ba2352178758c0222185e469507dae7fc73</citedby><cites>FETCH-LOGICAL-a435t-425356f1e4f338b5b2f732259b94f4ba2352178758c0222185e469507dae7fc73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/362831a0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/362831a0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=4722046$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Chen, Chang-Hwa</creatorcontrib><creatorcontrib>DePaolo, Donald J.</creatorcontrib><creatorcontrib>Nakada, Setsuya</creatorcontrib><creatorcontrib>Shieh, Yuch-Ning</creatorcontrib><title>Relationship between eruption volume and neodymium isotopic composition at Unzen volcano</title><title>Nature (London)</title><addtitle>Nature</addtitle><description>SILICA-rich lavas, erupted at island-arc or continental volcanoes, are often produced by a complex process involving the assimilation of crust into a crystallizing, mantle-derived basaltic magma
1
. The different strontium, neodymium and oxygen isotopic compositions of mantle-derived magmas and continental crust provide a powerful method for tracing the different contributions to continental silicic magmas, and for understanding the parameters controlling the composition and volume of erupted magma
1–4
. In the large rhyolite eruptive centres of the western United States, the largest-volume, explosive rhyolite eruptions have more mantle-like Nd isotope ratios than other silicic lavas from the same centre
2–4
, a relationship that has been interpreted as reflecting increased influx of mantle-derived basaltic magma to a crustal magma chamber before large-volume eruptions
1
. Here we report isotope data for lavas from Unzen volcano, which suggest a similar relationship: the Nd isotope composition is more mantle-like in three larger-volume dacite eruptions (>0.1 km
3
) than in one small-volume (0.02 km
3
) eruption. We accordingly suggest that, in small-volume systems like Unzen, where the timescales for magma-chamber evolution are of the order of decades, isotope data such as those presented here might be used in volcanic hazard evaluation.</description><subject>Crystalline rocks</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Geological hazards</subject><subject>Humanities and Social Sciences</subject><subject>Igneous and metamorphic rocks petrology, volcanic processes, magmas</subject><subject>Isotope geochemistry</subject><subject>Isotope geochemistry. 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1
. The different strontium, neodymium and oxygen isotopic compositions of mantle-derived magmas and continental crust provide a powerful method for tracing the different contributions to continental silicic magmas, and for understanding the parameters controlling the composition and volume of erupted magma
1–4
. In the large rhyolite eruptive centres of the western United States, the largest-volume, explosive rhyolite eruptions have more mantle-like Nd isotope ratios than other silicic lavas from the same centre
2–4
, a relationship that has been interpreted as reflecting increased influx of mantle-derived basaltic magma to a crustal magma chamber before large-volume eruptions
1
. Here we report isotope data for lavas from Unzen volcano, which suggest a similar relationship: the Nd isotope composition is more mantle-like in three larger-volume dacite eruptions (>0.1 km
3
) than in one small-volume (0.02 km
3
) eruption. We accordingly suggest that, in small-volume systems like Unzen, where the timescales for magma-chamber evolution are of the order of decades, isotope data such as those presented here might be used in volcanic hazard evaluation.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/362831a0</doi><tpages>4</tpages></addata></record> |
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| ispartof | Nature (London), 1993-04, Vol.362 (6423), p.831-834 |
| issn | 0028-0836 1476-4687 |
| language | eng |
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| source | SpringerLink Journals; Nature Journals Online |
| subjects | Crystalline rocks Earth sciences Earth, ocean, space Exact sciences and technology Geological hazards Humanities and Social Sciences Igneous and metamorphic rocks petrology, volcanic processes, magmas Isotope geochemistry Isotope geochemistry. Geochronology Isotopes Lava letter multidisciplinary Neodymium Science Science (multidisciplinary) Volcanoes |
| title | Relationship between eruption volume and neodymium isotopic composition at Unzen volcano |
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