Nickel isotope fractionation patterns in continental ultramafic environments generally show a depletion of δ 60 Ni weathered rocks and an enrichment bedrock samples. The present study focuses on stable carbonate-rich, ophiolite samples with concomitant fluids at active serpentinization site southwestern Turkey, comparison to results from inactive the Eastern Desert Egypt carbonate-rich All soli...

New geochemical data were presented for the mafic (basalts and gabbros) ultramafic (dunites, serpentinites pyroxenites) rocks from Mawat ophiolite exposed in Zagros suture zone northeastern Iraq. The mantle section of is composed serpentinized peridotites, harzburgites, dunites, chromitites pyroxenite dykes. crustal layered amphibole-rich gabbros, pegmatitic gabbros as well basalts minor felsic...

We present the geological map (1:10.000) of Montecastelli Pisano area, where (i) relationships between Neogene-Quaternary transfer and normal faults have been carefully mapped (Sheet 1), (ii) mantle sequence Ligurian Ocean has analysed 2). Fault analyses allowed to define: NE-trending fault system (left-lateral strike- oblique-slip faults) belonging a shear zone; NW-trending faults. Their evolu...

the serpentinization of the harzburgitic mantle section of the bou azzer neoproterozoic ophiolite is studied by field mapping, structural observations, optical micrography, sem and x-ray diffractometry, and relationships with co, ni, cr and sulphides minerals are discussed. serpentinization occurred in two major steps with, i) intra-oceanic pseudomorphic serpentinization materialized by the iso...

biogeochemical investigation on s. orientalis, a flora growing on the soils derived from serpentinized dunite in the forumad area, sabzevar ophiolite has been conducted in order to examine the plant-soil relationship in chromite prospecting. due to engagement of cr in the chromite crystal structure and its non-essential role in the plant’s life cycle, ni was used as pathfinder element in biogeo...