Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc: Various fluid and melt slab fluxes in response to slab temperature

Takeshi Hanyu, James Gill, Yoshiyuki Tatsumi, Jun Ichi Kimura, Keiko Sato, Qing Chang, Ryoko Senda, Takashi Miyazaki, Yuka Hirahara, Toshiro Takahashi, Iskandar Zulkarnain

研究成果: ジャーナルへの寄稿記事

8 引用 (Scopus)

抄録

[1] The Sangihe arc, northern Indonesia, is an oceanic arc that is the western half of the only active arc - arc collision on Earth. To elucidate magma genesis and slab thermal structure in such a setting, we have obtained new geochemical data for lavas from the entire Sangihe arc. In the southern arc, the volcanic front lavas are enriched in fluid-mobile elements, while the rear arc lavas are more enriched in melt-mobile elements. The proportion of sediment versus altered oceanic crust in the slab component is only ∼20% but still larger in Sangihe than other arcs in the western Pacific such as Izu, suggesting more subduction of the thick sediments in the narrowing Molucca Sea. The slab component changes in character across the arc from low-temperature fluid, through high-temperature fluid, to partial melt during progressive subduction. The geochemical systematics, the estimated mass fraction of the slab component, and the inferred stability of accessory rutile, zircon, and phengite in the slab are all similar between the southern Sangihe and Izu arcs, indicating that the thermal structure of the slab is not affected by impending collision. In contrast, lavas from the dormant northern Sangihe arc show geochemical characteristics similar to the Quaternary rear arc rather than the Quaternary volcanic front lavas in the southern arc. This may be related to advanced collision in the northern arc that could have slowed the subduction rate and heated the slab in the Pliocene followed by cessation of volcanic activity in the Quaternary.

元の言語英語
記事番号Q10021
ジャーナルGeochemistry, Geophysics, Geosystems
13
発行部数10
DOI
出版物ステータス出版済み - 10 1 2012

Fingerprint

lava
slab
slabs
arcs
melt
chemistry
Fluxes
Fluids
fluid
fluids
Sediments
temperature
Accessories
subduction
Temperature
thermal structure
Earth (planet)
arc-arc collision
collision
volcanology

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

これを引用

Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc : Various fluid and melt slab fluxes in response to slab temperature. / Hanyu, Takeshi; Gill, James; Tatsumi, Yoshiyuki; Kimura, Jun Ichi; Sato, Keiko; Chang, Qing; Senda, Ryoko; Miyazaki, Takashi; Hirahara, Yuka; Takahashi, Toshiro; Zulkarnain, Iskandar.

:: Geochemistry, Geophysics, Geosystems, 巻 13, 番号 10, Q10021, 01.10.2012.

研究成果: ジャーナルへの寄稿記事

Hanyu, T, Gill, J, Tatsumi, Y, Kimura, JI, Sato, K, Chang, Q, Senda, R, Miyazaki, T, Hirahara, Y, Takahashi, T & Zulkarnain, I 2012, 'Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc: Various fluid and melt slab fluxes in response to slab temperature', Geochemistry, Geophysics, Geosystems, 巻. 13, 番号 10, Q10021. https://doi.org/10.1029/2012GC004346
Hanyu, Takeshi ; Gill, James ; Tatsumi, Yoshiyuki ; Kimura, Jun Ichi ; Sato, Keiko ; Chang, Qing ; Senda, Ryoko ; Miyazaki, Takashi ; Hirahara, Yuka ; Takahashi, Toshiro ; Zulkarnain, Iskandar. / Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc : Various fluid and melt slab fluxes in response to slab temperature. :: Geochemistry, Geophysics, Geosystems. 2012 ; 巻 13, 番号 10.
@article{c68cff305581488aaebd55681666616a,
title = "Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc: Various fluid and melt slab fluxes in response to slab temperature",
abstract = "[1] The Sangihe arc, northern Indonesia, is an oceanic arc that is the western half of the only active arc - arc collision on Earth. To elucidate magma genesis and slab thermal structure in such a setting, we have obtained new geochemical data for lavas from the entire Sangihe arc. In the southern arc, the volcanic front lavas are enriched in fluid-mobile elements, while the rear arc lavas are more enriched in melt-mobile elements. The proportion of sediment versus altered oceanic crust in the slab component is only ∼20{\%} but still larger in Sangihe than other arcs in the western Pacific such as Izu, suggesting more subduction of the thick sediments in the narrowing Molucca Sea. The slab component changes in character across the arc from low-temperature fluid, through high-temperature fluid, to partial melt during progressive subduction. The geochemical systematics, the estimated mass fraction of the slab component, and the inferred stability of accessory rutile, zircon, and phengite in the slab are all similar between the southern Sangihe and Izu arcs, indicating that the thermal structure of the slab is not affected by impending collision. In contrast, lavas from the dormant northern Sangihe arc show geochemical characteristics similar to the Quaternary rear arc rather than the Quaternary volcanic front lavas in the southern arc. This may be related to advanced collision in the northern arc that could have slowed the subduction rate and heated the slab in the Pliocene followed by cessation of volcanic activity in the Quaternary.",
author = "Takeshi Hanyu and James Gill and Yoshiyuki Tatsumi and Kimura, {Jun Ichi} and Keiko Sato and Qing Chang and Ryoko Senda and Takashi Miyazaki and Yuka Hirahara and Toshiro Takahashi and Iskandar Zulkarnain",
year = "2012",
month = "10",
day = "1",
doi = "10.1029/2012GC004346",
language = "English",
volume = "13",
journal = "Geochemistry, Geophysics, Geosystems",
issn = "1525-2027",
publisher = "American Geophysical Union",
number = "10",

}

TY - JOUR

T1 - Across- and along-arc geochemical variations of lava chemistry in the Sangihe arc

T2 - Various fluid and melt slab fluxes in response to slab temperature

AU - Hanyu, Takeshi

AU - Gill, James

AU - Tatsumi, Yoshiyuki

AU - Kimura, Jun Ichi

AU - Sato, Keiko

AU - Chang, Qing

AU - Senda, Ryoko

AU - Miyazaki, Takashi

AU - Hirahara, Yuka

AU - Takahashi, Toshiro

AU - Zulkarnain, Iskandar

PY - 2012/10/1

Y1 - 2012/10/1

N2 - [1] The Sangihe arc, northern Indonesia, is an oceanic arc that is the western half of the only active arc - arc collision on Earth. To elucidate magma genesis and slab thermal structure in such a setting, we have obtained new geochemical data for lavas from the entire Sangihe arc. In the southern arc, the volcanic front lavas are enriched in fluid-mobile elements, while the rear arc lavas are more enriched in melt-mobile elements. The proportion of sediment versus altered oceanic crust in the slab component is only ∼20% but still larger in Sangihe than other arcs in the western Pacific such as Izu, suggesting more subduction of the thick sediments in the narrowing Molucca Sea. The slab component changes in character across the arc from low-temperature fluid, through high-temperature fluid, to partial melt during progressive subduction. The geochemical systematics, the estimated mass fraction of the slab component, and the inferred stability of accessory rutile, zircon, and phengite in the slab are all similar between the southern Sangihe and Izu arcs, indicating that the thermal structure of the slab is not affected by impending collision. In contrast, lavas from the dormant northern Sangihe arc show geochemical characteristics similar to the Quaternary rear arc rather than the Quaternary volcanic front lavas in the southern arc. This may be related to advanced collision in the northern arc that could have slowed the subduction rate and heated the slab in the Pliocene followed by cessation of volcanic activity in the Quaternary.

AB - [1] The Sangihe arc, northern Indonesia, is an oceanic arc that is the western half of the only active arc - arc collision on Earth. To elucidate magma genesis and slab thermal structure in such a setting, we have obtained new geochemical data for lavas from the entire Sangihe arc. In the southern arc, the volcanic front lavas are enriched in fluid-mobile elements, while the rear arc lavas are more enriched in melt-mobile elements. The proportion of sediment versus altered oceanic crust in the slab component is only ∼20% but still larger in Sangihe than other arcs in the western Pacific such as Izu, suggesting more subduction of the thick sediments in the narrowing Molucca Sea. The slab component changes in character across the arc from low-temperature fluid, through high-temperature fluid, to partial melt during progressive subduction. The geochemical systematics, the estimated mass fraction of the slab component, and the inferred stability of accessory rutile, zircon, and phengite in the slab are all similar between the southern Sangihe and Izu arcs, indicating that the thermal structure of the slab is not affected by impending collision. In contrast, lavas from the dormant northern Sangihe arc show geochemical characteristics similar to the Quaternary rear arc rather than the Quaternary volcanic front lavas in the southern arc. This may be related to advanced collision in the northern arc that could have slowed the subduction rate and heated the slab in the Pliocene followed by cessation of volcanic activity in the Quaternary.

UR - http://www.scopus.com/inward/record.url?scp=84868328587&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868328587&partnerID=8YFLogxK

U2 - 10.1029/2012GC004346

DO - 10.1029/2012GC004346

M3 - Article

AN - SCOPUS:84868328587

VL - 13

JO - Geochemistry, Geophysics, Geosystems

JF - Geochemistry, Geophysics, Geosystems

SN - 1525-2027

IS - 10

M1 - Q10021

ER -