Generation of trondhjemitic-tonalitic liquids and Archean bimodal trondhjemite-basalt suites

Episodic crustal growth in the southern segment of the Trans-North China Orogen across the Archean-Proterozoic boundary

“…In the Ab-Or-An diagram (Barker and Arth, 1976), the samples from the Dengfeng Complex range from tonalite, trondhjemite, and granodiorite to granite, although most plot in the fields of tonalite and trondhjemite (Fig. 6).…”

“…6. Ab-Or-An classification diagram (Barker and Arth, 1976) for the TTG gneisses of the Dengfeng and Taihua Complexes. Large symbols -data from Table 1; (Table 1), are most likely the result of plagioclase accumulation (Fig.…”

Volgo-Uralia: The first U-Pb, Lu-Hf and Sm-Nd isotopic evidence of preserved Paleoarchean crust

“…1) have lately attracted particular attention due to their deformation and migmatization in the proximity of the Bak 2 granitic intrusions. Preliminary geochrono- Barker and Arth, 1976). Sources: 70 chemical analyses from the archives of the Department of Lithology, the Gubkin State University of Oil and Gas, Moscow, were used together with 27 new ISP analyses (table 1).…”

Litogeoquímica do Complexo Campos Gerais e granitoides intrusivos, Arqueano/Paleoproterozoico, Brasil

“…O diagrama triangular que relaciona K 2 O, Na 2 O e CaO (Barker & Arth 1976) sugere que o Ortognaisse Campos Gerais pode estar relacionado a uma série trondhjemítica, enquanto o Ortognaisse Mandembo a uma série calcioalcalina (Fig. 6C).…”

“…Grão Mogol apresenta assinatura subalcalina, calcioalcalina (Irvine & Barangar 1971, Barker & Arth 1976, moderadamente a fracamente peraluminosa, de médio a alto-K (Fig. 10).…”