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The late Variscan Nisa-Albuquerque batholith in the SW Iberian Massif, consists of a dominant very coarse-grained porphyritic S-type monzogranite to syenogranite (Nisa monzogranite) surrounding a discontinuous central core that includes contrasting very fine-grained I-type tonalite–granodiorite (Aldeia da Mata tonalite). The batholith is located at the boundary between the Central Iberian and Ossa-Morena...
Sensitive high-resolution ion microprobe (SHRIMP) zircon U–Pb ages, and whole-rock chemical and isotopic (Sr–Nd) compositions, have been measured on some Middle Triassic plutonic rocks associated with post-collisional magmatism in the Gyeonggi Massif (Hongseong, Namyang and Yangpyeong areas), South Korea. Plutonic rocks from the southwest (Hongseong) and central (Yangpyeong) Gyeonggi Massif and central...
Petrological analysis, zircon trace element analysis and SHRIMP zircon U–Pb dating of retrogressed eclogite and garnet granulite from Bibong, Hongseong area, SW Gyeonggi Massif, South Korea provide compelling evidence for Triassic (231.4±3.3 Ma) high-pressure (HP) eclogite facies (M1) metamorphisms at a peak pressure–temperature (P–T) of ca. 16.5–20.0kb and 775–850°C. This was followed by isothermal...
The Central Zone of the Limpopo Belt (South Africa) underwent high-grade metamorphism at ∼2.7–2.5 and ∼2.03 Ga. Quartz-rich, garnet-, cordierite-, biotite- and orthoamphibole-bearing, feldspar-free gneisses from the western Central Zone reached granulite-facies conditions (∼800 °C at ∼8–10 kbar) followed by decompression. Garnet from one such sample shows significant zonation in trace elements but...
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