Evidence of magma mixing: Petrological study of Shirouma-Oike calc-alkaline andesite volcano, Japan

Sakuyama, M.

doi:10.1016/0377-0273(79)90040-4

Cited by 170 publications

(52 citation statements)

References 19 publications

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“…Magma mixing has been repeatedly dis cussed, and found to occur ubiquitously in calc alkaline volcanic suites (Eichelberger, 1975(Eichelberger, , 1980Anderson, 1976;Sakuyama, 1979Sakuyama, , 1981Gerlach and Grove, 1982;Grove et al, 1982;Sakuyama and Koyaguchi, 1984;Koyaguchi, 1986a, b). In the last decade, the con cept of the periodically refilled magma chamber (Yanagi, 1975;O'Hara, 1977;O'Hara and Mathews, 1981) has increasingly become an important idea for understanding the arc volcanism.…”

Section: Introductionmentioning

confidence: 99%

Petrochemical evidence for coupled magma chambers beneath the Sakurajima volcano, Kyushu, Japan.

1991

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Section: Introductionmentioning

confidence: 99%

Petrochemical evidence for coupled magma chambers beneath the Sakurajima volcano, Kyushu, Japan.

1991

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“…These petrographic features indicate an increasing temperature and a change of chemical composition of the low temperature magma accompanying magma mixing (Sakuyama, 1979;Venesky and Rutherford, 1999;Nakagawa et al, 2002;Reubi et al, 2002;Devine et al, 2003) caused by a recharge of more mafic magma.…”

Section: Interpretation Of Petrological Datamentioning

confidence: 99%

Morphometric age and petrological characteristics of volcanic rocks from the Bajawa Cinder Cone Complex, Flores, Indonesia

Sucipta

Takashima

Muraoka

2006

Journal of Mineralogical and Petrological Sciences

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The Bajawa Cinder Cone Complex consists of at least 78 cinder cones, which can be grouped into five morphometric ages. The oldest group, Bajawa 01, is dated between 0.53 and 0.73 Ma. The groups Bajawa 02, 03, and 04 have an age range from 0.41 Ma to 0.51 Ma, 0.32 Ma to 0.40 Ma, and 0.22 Ma to 0.31 Ma, respectively; the youngest cinder cone group, Bajawa 05, is aged between 0 and 0.20 Ma.Three batches of magma have contributed to the long eruptive episode of the complex. Magma mixing and fractional crystallization were important processes in differentiation. Magma mixing may have been caused by recharge of a mafic contributor to form a mixed magma in a temperature range of 836 °C 978 °C and at a pressure of less than 1.25 kbar before eruption.

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“…Several lines of evidence point to magma mixing as being a significant factor in controlling the composition of some Maungatautari lavas, and magma mixing is weil documented in many volcanoes of intermediate composition elsewhere (e.g., Eichelberger 1975;Anderson 1976;Stern 1979;Sakuyama 1979Sakuyama , 1981Luhr & Carmichael 1980). Evidence of mixing with more mafic olivine-bearing magma has already been discussed to explain the variation in trace element concentrations, particularly Ni, from those predicted by crystal fractionation models.…”

Section: Magma Mixingmentioning

confidence: 99%

Petrology and geochemistry of Maungatautari, a medium-K andesite-dacite volcano

Briggs

1986

New Zealand Journal of Geology and Geophysics

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Maungatautari is an isolated andesitedacite composite volcano of Pliocene-Pleistocene age located 70 km northwest of the Taupo Volcanic Zone, New Zealand. It is composed of a suite of pyroxene andesite, labradorite andesite, and hornblende dacite lavas, volcanic breccias, and Iatestage radial dikes. Maungatautari lavas have large K 2 0 contents that project within the medium-K andesite suites. Petrogenetic modelling of major and trace element abundances, combined with the presence of disequilibrium phenocryst assemblages, suggests that the pyroxene andesites are the result ofmixing ofandesitic magma with a primitive basaltic magma. One group of labradorite andesites and hornblende dacites is related by fractional crystallisation, but this was in part an open-system process and may have been slightly modified by such factors as magma mixing. Another group appears to be the product of mixing between endmembers that lie somewhere within the continuous fractionation trend from pyroxene andesite to hornblende dacite. The occurrence of accessory and accidental xenoliths also suggests that crustal contamination and assimilation is most likely although this is yet to be isotopically confirmed. It is considered that Maungatautari was a subductionrelated volcano situated behind the volcanic front 1.8 m.y. ago. It is geochemically and tectonically distinct from the Alexandra Voleanies or any of the other volcanic rocks of similar age northwest of the Taupo Volcanic Zone.

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Evidence of magma mixing: Petrological study of Shirouma-Oike calc-alkaline andesite volcano, Japan

Cited by 170 publications

References 19 publications

Petrochemical evidence for coupled magma chambers beneath the Sakurajima volcano, Kyushu, Japan.

Petrochemical evidence for coupled magma chambers beneath the Sakurajima volcano, Kyushu, Japan.

Morphometric age and petrological characteristics of volcanic rocks from the Bajawa Cinder Cone Complex, Flores, Indonesia

Petrology and geochemistry of Maungatautari, a medium-K andesite-dacite volcano

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