Mafic microgranular enclaves provide significant information on the nature of source rocks, the genesis of granitic magma (Pin et al.
The parental granitic magma underwent the mixing of mantle-derived mafic magma and crustal felsic magma, coupled with fractional crystallization during magma ascent before emplacement.
1997, Successive granitic magma
batches during pluton emplacement: The case study of Cabeza de Araya, Spain: Journal of Petrology, v.
transport by fracture propagation // Tectonophysics.
This indicates more dynamic conditions during crystallization than previously thought for granitic magma
chambers, and represents an important mechanism for crystal-melt fractionation.
All these effects must be carefully evaluated before a conclusive determination of D for a metal during evolution of a granitic magma system as described here can be achieved.
However, early crystallization of magnetite did not appear to severely influence the ability of a calc-alkaline granitic magma to yield a gold-rich ore fluid, according to experimental study of Au partitioning between magnetite and granitic magma (Simon et al.
Topics include: Plutonism versus Neptunism, the sanukitoid series, the geochemistry of Archaean plagioclase-rich granites as a marker of source enrichment and depth of melting, chemical structure in granitic magmas
, and more.
This variation is consistent with the saturation behaviour of zircon in crystallizing granitic magmas (Hanchar and Watson 2004), and the decreasing REE contents noted above.
Mafic silicates as indicators of intensive variables in granitic magmas.
They described evidence of magma mingling, and concluded that the gabbroic, dioritic, and granitic magmas
that formed these plutons were coeval.
The generation of granitic magmas
by intrusion of basalt into continental crust.