WebApr 1, 2012 · This study reports examples of midcrustal hybridization in the Norwegian Caledonides. In these examples, partial to complete hybridization of mafic magmas with granitic magmas resulted in relatively Fe-rich hybrids that straddle the metaluminous-peraluminous boundary, contain characteristic Ca-rich garnet, span a range of initial Nd … WebNov 1, 2001 · This arises from the fact that the geochemical compositions of granitic magmas reflect the compositions of their source rocks rather than their tectonic setting (e.g. Pearce et al., 1984). For example, the geochemical classification is not able to distinguish a granitoid formed in a subduction setting and one formed from source rocks that had ...

Supplemental material: Dynamic growth of garnet in granitic magmas

WebJul 6, 2009 · Garnet-rich zones, on the scale of decimeters to a few meters, are present in nearly all rock types of the SMB, but they are most common along and near contacts with the metapelitic Halifax Group. There, the garnet-rich zones make up ≤2 vol. % of the rocks (Fig. 3a). Garnet crystals are subhedral, and up to c. 2 cm in size (Fig. 5; Table 1). impulsive in asl

Magma, Magma, Quite Contaminated, How Does Your Garnet Grow?

WebJun 1, 1998 · The microtexture formed during D 1 has been variably modified by dynamic recrystallization, and then by later grain growth during the 2678 Ma metamorphism. The typical grain size for felsic (>66% SiO 2 ) grey gneiss from the lower amphibolite facies is ∼0.7 mm. Samples of grey gneiss that retain their S 1 foliation and banding in the ... WebMar 1, 2012 · The source is the primary control on granite magma chemistry; it dictates what is available to dissolve in the melt and what will be formed as the entrainable peritectic … Webadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A lithium from battery in water