Application of the Restite Model to the Deddick Granodiorite and its Enclaves --a Reinterpretation of the Observations and Data of Maas et al. (1997)

Abstract

distinctive suite of enclaves, dominated by schists and gneisses of high Maas et al. (1997, Journal of Petrology 38, chemical and isotopic features of several kinds of enclaves 815-841) recently described enclaves from the S-type Deddick in the S-type Deddick Granodiorite of the Lachlan Fold Granodiorite. They concluded that the metasedimentary enclaves Belt (LFB), exposed at McKillops Bridge. That grancould be either source lithologies or accidental xenoliths, and that odiorite is a member of the Bullenbalong Suite (area the most common microgranular enclaves formed as globules of ~3100 km 2 ; All features of very extensive and slightly more diverse Bullenbalong the metasedimentary enclaves are consistent with an origin as lithic Supersuite (total area ~8750 km 2 plus ~4000 km 2 of restite fragments from the source, and their ubiquity in the mafic Svolcanic rocks); it occurs near the southern extremity of type granites and their rarity in both felsic varieties and in I-type those granites. These are the rocks that have been used granites conform with such an origin. The argument that these as primary examples of restite and of the restite model enclaves are not in chemical equilibrium with the host granite in S-type granites (Hine et al., 1976; White & Chappell, because they do not complement its composition is not valid, as they 1977; Unaltered cores of microgranular enclaves in the restite sediment is probable. Partial melting during that metamorphism