The origins of Cenozoic granites in the Himalaya are key to understanding evolution Himalayan orogen. However, it is unclear whether these represent primary melts, and nature their magma source controversial. Here, we present a systematic element Sr–Nd–B–Mo isotope study from Yardoi area eastern Tethyan Himalaya, China. These can be divided into two groups: mid-Eocene porphyritic two-mica with ...

The Puncoviscana Formation, largely cropping out in NW Argentina, is mainly composed of a pelite-greywacke turbidite sequence affected by incipient regional metamorphism and polyphase deformation. Metapelites, composed mainly of quartz, albite, dioctahedral mica and chlorite, were sampled in the Lules-Puncoviscana and Choromoro belts. Lattice-fringe images, selected area electron diffraction an...

Structural analysis of quartz vein systems and fluid inclusion criteria were used to distinguish five different fluid types which flowed through a segment of Palaeozoic crust in southwest England during the Variscan orogeny. Mineralogical constraints in combination with fluid inclusion thermobarometry enabled the temperature of vein formation to be estimated, and isotopic compositions of fluids...

A study of natural oxy-tourmalines belonging to the system oxy-dravite – chromo-alumino-povondraite – oxy-chromium-dravite from the Sludyanka crystalline complex (Southern Baikal region, Russia) was carried out to explore the characteristic vibrational bands in the principal (OH)-stretching frequency and their relations to the O3 Revised Manuscript Click here to download Manuscript: Cr-tm_IR ms...

The Raja Au-Co mineralization in the Paleoproterozoic Peräpohja belt northern Finland is part of wider Rompas-Rajapalot mineralized area with several known occurrences. characterized by distinct tourmaline occurrences, spatially associated mineralization. Four texturally types were identified although all analysed tourmalines belong to alkali-group and are classified as dravite. δ 11B values fr...

This paper is an outgrowth of the compilation of metamorphic information for the Canadian Shield in Ontario, and complements the recently compiled Metamorphic Map of the Canadian Shield. The paper contains a summary of the Archean metamorphic history of the Superior Province in Ontario on a subprovince basis, with an emphasis on the limitations of the existing data and the reasoning applied in ...

Abstract Inclusions of relic high-pressure melts provide crucial information on the fate crustal rocks in deep roots orogens during collision and thickening, including at extreme temperature conditions exceeding 1000 °C. However, discoveries melt inclusions are still a relative rarity among case studies metamorphic minerals. Here we present results experimental microchemical investigations nano...