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- W2375841738 abstract "Mafic enclaves are widespread in the Mesozoic monzonitic batholiths of the Taihang mountains. Compositional and textural disequilibrium can be found in plagioclase crystals from both mafic enclaves and host rocks. Normally, plagioclase has a calcium-rich core with An=57～65, mantled by a sodium-rich rim with An=20～35. This abrupt change from a high-anorthite core to a low-anorthite rim in single plagioclase crystals is likely an indication of magma mixing between mantle- and crustal-derived melts. The cores represent plagioclase crystallized from a mantle-derived mafic magma, and the rims represent plagioclase from hybrid magma sources. Similarly, compositional zoning can be observed in hornblende crystals in which aluminum and titanium contents are high in the core (yellow- to brown in color) and low in the rim (green in color); these zones fall in the compositional fields of pargasite and edenite, respectively. Pargasite crystallized at significantly higher temperatures than edenite, which is consistent with our model of magma mixing. In addition, the magma-mixing model is supported by geochemical data. The characteristic geochemical signatures of high-K and Mg~#, highly fractionated REE patterns (with minor Eu anomalies), high Sr-Ba abundances, and enriched Sr-Nd isotopic compositions are believed to originate from the hybridization of enriched mantle-derived mafic magma with granitic melts of crustal origin." @default.
- W2375841738 created "2016-06-24" @default.
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- W2375841738 date "2006-01-01" @default.
- W2375841738 modified "2023-09-23" @default.
- W2375841738 title "Magma-mixing between mantle- and crustal-derived melts in the process of Mesozoic magmatism, Taihangshan: constraints from petrology and geochemistry." @default.
- W2375841738 hasPublicationYear "2006" @default.
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