The relationship between crustal magmatic underplating and granite genesis: an example from the Velay granite complex, Massif Central, France

B. J. Williamson; H. Downes; M. F. Thirlwall

doi:10.1130/SPE272-p235

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The relationship between crustal magmatic underplating and granite genesis: an example from the Velay granite complex, Massif Central, France

Author(s)

B. J. Williamson

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;

H. Downes

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;

M. F. Thirlwall

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GSW

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Doi:

https://doi.org/10.1130/SPE272-p235

Published:

January 01, 1992

The Velay granite pluton (Massif Central, France) is the youngest (304 ± 5 Ma) and largest (∼6,900 km²) of the major Massif Central monzogranites/granodiorites and was formed nearly 50 Ma after the cessation of Hercynian continental collision (Pin & Duthou 1990). It is a highly heterogeneous pluton consisting of I-type, high-Sr granites (Sr= 500–900 ppm) with low ε_{Sr₍₃₀₄₎} (+35 to +41) and high ε_{Nd₍₃₀₄₎} (−3 to −5), at its centre, grading into S-type and mixed I–S-type heterogeneous granites of more normal Sr content (100–420 ppm) and higher ε_{Sr₍₃₀₄₎} (+40 to +210) and...

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