The Pre-Caledonian margin of Baltica has been outlined as a tapering wedge with increasing magmatism towards the ocean–continent transition. It is, however, well known that margins are complex, different and diachronous evolution along across strike. Baltica’s vestiges in Scandes have complexities akin to modern margins. included microcontinent magma-poor hyperextended magma-rich segments. was ...

Abstract Mantle serpentinization influences the rheology of altered peridotites and global fluxes energy volatiles, generation seafloor sub-seafloor chemolithotrophic life, carbon cycle. As a by-product serpentinization, molecular hydrogen (H2) is generated, which supports chemosynthetic communities, this mechanism may have driven origin life on early Earth. At continent-ocean transition zones ...

Serpentinized mantle peridotites form prominent mountains, including the highest elevations of Troodos ophiolite in Cyprus (Mount Olympus, 1,952 m), but to date, only qualitative mechanisms have been proposed explain uplift rocks high altitudes. Serpentinization reactions between and water result profound changes rheology physical properties significant density reduction (∼900 kg/m3). Field obs...

Abstract We present a summary of peridotite in the Subantarctic (46–60° S) surrounding Antarctic Plate. Peridotite xenoliths occur on Kerguelen Islands and Auckland Islands. The are underlain by plume, whereas part continental Zealandia, which is Gondwana-rifted fragment. Small amounts serpentinized has been dredged from fracture zones Southeast Indian Ridge, Southwest Ridge Pacific represent u...

Dunites in ophiolites form by pyroxene dissolution and olivine precipitation during melt-peridotite interaction. We present structural geochemical data on peridotites from the Batin region (Wadi Tayin massif) of Oman ophiolite, where an exceptionally large (∼9.5 km long) dunite body was sampled ICDP Drilling Project (BA4A borehole). 900–1,200 m beneath petrological Moho, this is overlain harzbu...

In the Cheshmeh-Bid district of Khajeh-Jamali ophiolitic massifs (Southern Iran), mantle peridotites are intruded by abundant pyroxenite dykes. A few these dykes remarkable for occurrence native copper associated with development a metasomatic reaction zone. The progressively reacted, from their margins towards center, an amphibole + antigorite selvage, followed centimeter-thick clinopyroxene a...