Abstract The paper presents data on granites and gneisses recovered by Kulindinskaya-1 hole drilled in the central part of Siberian Craton. biotite retain a porphyritic texture, correspond to I-type according their compositional features, are enriched LREE moderately depleted HREE, have negative Eu, Sr, Nb positive Zr anomalies. U−Pb zircon age is Neoarchean (2525 ± 10 Ma), with single cores gr...

Zircons from charnockitoids of the Tashlyk complex Pryinhul syncline were studied and dated in order to determine their chronostratigraphic position. two age generations identified, namely Early Archean (ca. 3 Ga) Proterozoic (2.0±0.1 Ga). The presence former generation indicates that protolith for charnockites have been represented by rocks older than Spasove Series, which is considered be age...

The article provides a novel detailed petrographic, petrochemical and mineralogical description of the Talatshinskoye-2 slab stone deposit. Fergusonite was found in rocks Uraltau anticlinorium for first time. correlation studied object with other deposits carried out. An increased content alkalis revealed, which is an atypical characteristic shales eastern flank anticlinorium. contents niobium ...

Lithological, structural, metamorphic and geochronological data for the North China Craton enable its division into the Western and Eastern Blocks of Archean to Paleoproterozoic age separated by a north–south trending Paleoproterozoic orogenic belt: the Central Zone. The Central Zone is divisible into a series of lowto medium-grade granite–greenstone belts and high-grade metamorphic terrains co...

Abstract Drilling related to development of the platinum-group element deposit J-M Reef Stillwater Complex returned samples a rare chromitite seam between anorthosite and norite in discordant anorthositic body. Plagioclase core An concentrations are marginally higher modestly reversely zoned on side (average Ancore = 83·8; average – Anrim –1·1) as compared with 82·5; +1·0). The anorthosites als...

Talc formation via silica-metasomatism of ultramafic rocks is believed to play key roles in subduction zone processes. Yet, the conditions talc remain poorly constrained. We used thermodynamic reaction-path models assess at slab-mantle interface and show that it restricted a limited set pressure–temperature conditions, protolith, fluid compositions. In contrast, our predict chlorite ubiquitous ...

We estimated the protolith age and peak metamorphic temperature of Yokokawagawa rocks (YMR) east Itoigawa–Shizuoka Tectonic Line using detrital zircon U–Pb dating Raman carbonaceous material geothermometry, respectively. a psammitic rock yielded youngest ∼100 Ma, which corresponds to age. geothermometry results for five pelitic samples give temperatures ∼350–380 °C. The is consistent with those...