Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace
Major and trace element compositions and Sr, Nd, Pb, and Hf isotope ratios of Aleutian island arc lavas from Kanaga, Roundhead, Seguam, and Shishaldin volcanoes provide constraints on the com-position and origin of the material transferred from the subducted slab to the mantle wedge. 40Ar/39Ar datin...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.600.5675 2023-05-15T13:14:40+02:00 Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace Element Abundances B. R. Jicha B. S. Singer J. G. Brophy J. H. Fournelle C. M. Johnson B. L. Beard T. J. Lapen N. J. Mahlen The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.5675 http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.5675 http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf text 2003 ftciteseerx 2016-01-08T14:01:12Z Major and trace element compositions and Sr, Nd, Pb, and Hf isotope ratios of Aleutian island arc lavas from Kanaga, Roundhead, Seguam, and Shishaldin volcanoes provide constraints on the com-position and origin of the material transferred from the subducted slab to the mantle wedge. 40Ar/39Ar dating indicates that the lavas erupted mainly during the last 400 kyr. Along-arc geochemical and isotopic variations are consistent with variable degrees of fluid input to the mantle wedge. Addition of bulk sediment, partially melted sediment, or a combination of sediment and fluid components may also explain the major and trace element and isotopic composi-tions of some Aleutian lavas. Mass-balance modeling suggests that the fluid is derived from subducted sediment (10–25%) and under-lying oceanic crust (75–90%). Hf–Nd isotope data suggest that relative to Nd, little Hf is transferred to the mantle wedge via fluid. Lavas from Seguam Island in the central Aleutian arc have distinctly Text Aleutian Island Unknown |
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Major and trace element compositions and Sr, Nd, Pb, and Hf isotope ratios of Aleutian island arc lavas from Kanaga, Roundhead, Seguam, and Shishaldin volcanoes provide constraints on the com-position and origin of the material transferred from the subducted slab to the mantle wedge. 40Ar/39Ar dating indicates that the lavas erupted mainly during the last 400 kyr. Along-arc geochemical and isotopic variations are consistent with variable degrees of fluid input to the mantle wedge. Addition of bulk sediment, partially melted sediment, or a combination of sediment and fluid components may also explain the major and trace element and isotopic composi-tions of some Aleutian lavas. Mass-balance modeling suggests that the fluid is derived from subducted sediment (10–25%) and under-lying oceanic crust (75–90%). Hf–Nd isotope data suggest that relative to Nd, little Hf is transferred to the mantle wedge via fluid. Lavas from Seguam Island in the central Aleutian arc have distinctly |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
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Element Abundances B. R. Jicha B. S. Singer J. G. Brophy J. H. Fournelle C. M. Johnson B. L. Beard T. J. Lapen N. J. Mahlen |
spellingShingle |
Element Abundances B. R. Jicha B. S. Singer J. G. Brophy J. H. Fournelle C. M. Johnson B. L. Beard T. J. Lapen N. J. Mahlen Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
author_facet |
Element Abundances B. R. Jicha B. S. Singer J. G. Brophy J. H. Fournelle C. M. Johnson B. L. Beard T. J. Lapen N. J. Mahlen |
author_sort |
Element Abundances |
title |
Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
title_short |
Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
title_full |
Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
title_fullStr |
Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
title_full_unstemmed |
Variable Impact of the Subducted Slab on Aleutian Island Arc Magma Sources: Evidence from Sr, Nd, Pb, and Hf Isotopes and Trace |
title_sort |
variable impact of the subducted slab on aleutian island arc magma sources: evidence from sr, nd, pb, and hf isotopes and trace |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.5675 http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf |
genre |
Aleutian Island |
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Aleutian Island |
op_source |
http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.600.5675 http://petrology.oxfordjournals.org/content/45/9/1845.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766264871855325184 |