Primitive andesites from the Taupo Volcanic Zone formed by magma mixing

@article{Beier2017PrimitiveAF,
  title={Primitive andesites from the Taupo Volcanic Zone formed by magma mixing},
  author={Christoph Beier and Karsten M. Haase and P. A. Brandl and Stefan Krumm},
  journal={Contributions to Mineralogy and Petrology},
  year={2017},
  volume={172},
  pages={1-14}
}
Andesites with Mg# >45 erupted at subduction zones form either by partial melting of metasomatized mantle or by mixing and assimilation processes during melt ascent. Primitive whole rock basaltic andesites from the Pukeonake vent in the Tongariro Volcanic Centre in New Zealand’s Taupo Volcanic Zone contain olivine, clino- and orthopyroxene, and plagioclase xeno- and antecrysts in a partly glassy matrix. Glass pools interstitial between minerals and glass inclusions in clinopyroxene… Expand

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References

SHOWING 1-10 OF 106 REFERENCES
Oxygen isotope evidence for the formation of silicic Kermadec island arc and Havre-Lau backarc magmas by fractional crystallisation
Abstract Silicic magmas in subduction-related settings are believed to form either by extreme crystal fractionation or by partial melting of crustal rocks, particularly hydrothermally metamorphosedExpand
Rift-Related Transition from Andesite to Rhyolite Volcanism in the Taupo Volcanic Zone (New Zealand) Controlled by Crystal–melt Dynamics in Mush Zones with Variable Mineral Assemblages
The Taupo Volcanic Zone (TVZ), located in the North Island of New Zealand, represents part of a magmatic arc that is at present undergoing active extension. Around 0·9 Myr ago, an acceleration inExpand
High-magnesian andesite from Mount Shasta: A product of magma mixing and contamination, not a primitive mantle melt
It has been proposed that high-Mg andesites (HMAs) from the Mount Shasta area may represent near-primary mantle melts, carrying signatures of slab melt interaction with the Cascadia mantle wedge. WeExpand
Magnesian andesite in the western Aleutian Komandorsky region: Implications for slab melting and processes in the mantle wedge
The role of the subducting lithospheric slab in the genesis of mantle-derived (primitive) magmas is investigated through a study of volcanic rocks formed in the tectonically strike-slip–dominatedExpand
Formation of hybrid arc andesites beneath thick continental crust
Abstract Andesite magmatism at convergent margins is essential for the differentiation of silicate Earth, but no consensus exists as to andesite petrogenesis. Models proposing origin of primaryExpand
Petrology and petrogenesis of volcanic rocks from the Taupo Volcanic Zone: a review
Abstract Taupo Volcanic Zone (TVZ) volcanic rocks comprise three major compositional series: high-alumina basalt (HAB), andesite, and rhyolite, plus a fourth, minor, dacitic series resulting fromExpand
Crustal and mantle influences and U-Th-Ra disequilibrium in andesitic lavas of Ngauruhoe volcano, New Zealand
Abstract The andesitic volcano Ngauruhoe, which is located within the Tongariro Volcanic Complex at the southern end of the Taupo Volcanic Zone in North Island, New Zealand, has been constructed overExpand
Formation of island arc dacite magmas by extreme crystal fractionation: An example from Brothers Seamount, Kermadec island arc (SW Pacific)
Abstract Dacitic to rhyolitic glasses from Brothers Seamount in the southern Kermadec island arc lie on very tight major element trends and have formed by fractional crystallization from a basalticExpand
Oxygen isotope evidence for the formation of andesitic-dacitic magmas from the fast-spreading Pacific-Antarctic Rise by assimilation-fractional crystallisation
Abstract Andesitic to dacitic lavas occur along a 300 km long portion of the Pacific–Antarctic Rise close to the intersection of the spreading axis with the Foundation seamount chain. The freshExpand
Derivation of some modern arc magmas by melting of young subducted lithosphere
MOST volcanic rocks in modern island and continental arcs are probably derived from melting of the mantle wedge, induced by hydrous fluids released during dehydration reactions in the subductedExpand
...
1
2
3
4
5
...