The transition from the Semail ophiolite mantle to underlying metamorphic sole was drilled at ICDP OmanDP Hole BT1B. We analyzed bulk major, volatile and trace element compositions of mantle-derived listvenite series rocks, with aim constrain chemical transfers associated peridotite carbonation along basal thrust. comprise variously carbonated serpentinites (fuchsite-bearing) listvenites. They ...

We have compiled data on textures, trace element contents, Hf isotope compositions and U-Pb ages of zircons from lower crustal xenoliths the central part Columbia supercontinent in Precambrian areas North America, Siberia Northern Europe to address question when host rocks became continental crust. The time crust reached its current state, a layer high-pressure granulite-facies rocks, is dated ...

Abstract Continental formation models invoke subduction or plume‐related processes to create the buoyant, refractory character of continental lithospheric mantle (CLM). From similarities in melt depletion, major element composition, modal clinopyroxene, and Os isotope systematics it has been proposed that oceanic lithosphere is likely protolith non‐cratonic CLM, however, a direct link between t...

Abstract This study describes mineralogical and crystallochemical characteristics of metamorphic tourmalines from an Alpine shear zone in a Variscan rock sequence the Maramures region northern part East Carpathians. We use this mineral to unravel aspects evolution tourmaline bearing host rocks compare crystallo-chemical other Alps. Petrographic microstructural observations, as well electron mic...

Hydrothermal gold mineralization is commonly associated with metasomatic processes resulting from interaction of hostrock infiltrating hot aqueous fluids. Understanding the alteration mechanism requires quantification element changes in altered rock, relative to unaltered or least-altered representing protolith. Balanced mineral reactions are used gain quantitative insight into process at Awak ...

P-wave anisotropy is significant in the mylonitic Alpine Fault shear zone. Mineral- and texture-induced are dominant these rocks but further complicated by presence of fractures. Electron back-scattered diffraction synchrotron X-ray microtomography (micro-CT) data acquired on exhumed schist, protomylonite, mylonite, ultramylonite samples to quantify mineral phases, crystal preferred orientation...

Abstract The Oulongbuluke Block is an integral part of the Columbia and Rodinia supercontinents, but lack rock records from transitional period between supercontinents during mid–late Mesoproterozoic has impeded our understanding tectonic relationship Block, which lies supercontinents. In this contribution, we present a systematic petrographic, geochemical, zircon U-Pb-Hf investigation newly di...

The article addresses the problem of functional purpose shaft-type furnaces with chimneys found at Late Bronze Age sites Northern Eurasia. This category thermal engineering structures became widespread in eastern wing West Asian (Eurasian) metallurgical province. Thermal sets flue channels are physical evidence implementation technological algorithms pastoral model metal production based primar...