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Sea of solitude download size5/28/2023 ![]() ![]() The systematic field observations together with textural observation at both µm- and nm-scales, geochemical signatures from whole-rock analyses and microanalysis and thermodynamic modelling were used to figure out the processes that promoted magnetite and copper formation in ophiolitic peridotites during serpentinization.To conclude, the strongly reducing conditions associated with serpentinization of oceanic peridotites is considered to be a prerequisite for the formation of native copper and magnetite deposits in serpentinites. These two occurrences have been selected since they provide a remarkable case study to better constrain Fe, Cr and Cu mobility during the hydrothermal evolution of peridotite-hosted hydrothermal systems. thesis presents the results of two natural case studies of key processes of mass transfer and RedOx evolution during fluid-rock interaction: (i) serpentinite-hosted podiform magnetite ores in the Sabzevar ophiolite (NE Iran) and (ii) Cu-rich hydrothermally altered pyroxenites in the Cheshmeh-Bid ophiolitic massif (Southern Iran). The study of the effect of these extreme RedOx conditions achieved during serpentinization, on the mobility of metals is at the heart of this PhD work.To advance in this overall research goal, this Ph.D. Indeed, serpentinization of peridotite triggers the generation of substantial amounts of dihydrogen (H2,aq) which favors the stability of native metals in serpentinites. One of the characteristics of the serpentinisation process is to generate highly reducing conditions in its early stages. ![]() During the last decade, processes of formation of serpentinite-hosted metal deposits with mineable sizes has attracted attention as curiosities. dissertation is to better understand mass transfer of Fe, Cr and Cu, three elements of economical interest, during serpentinization of ultramafic rocks. Small faults and a present-day weaker tectonic regime with respect to that acting during the Pleistocene might explain the lack of strong seismicity in the long historical record, suggesting that a large earthquake is not likely to occur. We also show that the evident structural control over the drainage network in this area reflects an extreme degree of fragmentation of a set of buried faults generated under two competing stress fields throughout the Pleistocene. Through the analysis of the focal mechanism and the morphostructural setting of the epicentral area of a “typical” moderate earthquake (Ml= 3.3) that recently occurred in the northern urban area of Rome, we demonstrate that this event reactivated a buried segment of an ancient fault generated under both a different and a stronger tectonic regime than that which is presently active. While this fact suggests that a moderate seismotectonic regime characterizes the Roman area, no study has provided a comprehensive explanation for the lack of strong earthquakes in the region. However, no destructive earthquake has been reported in the sources, and all of the greatest damage suffered in the past has been attributed to far-field events. Software Usage Terms apply, See eu./legal for full usage rights.Rome has the world's longest historical record of felt earthquakes, with more than 100 events during the last 2600 years. exclusively licensed to Sony Interactive Entertainment Europe. Library programs ©Sony Interactive Entertainment Inc. See Health Warnings for important health information before using this product. Sign in to PlayStation Network is not required to use this on your primary PS4, but is required for use on other PS4 systems. One-time licence fee to download to multiple PS4 systems. See Terms of Service for more important information. If you do not wish to accept these terms, do not download this product. See /bc for more details.ĭownload of this product is subject to the PlayStation Network Terms of Service and our Software Usage Terms plus any specific additional conditions applying to this product. To play this game on PS5, your system may need to be updated to the latest system software. When playing on PS5, this game may exhibit errors or unexpected behaviour and some features available on PS4 may be absent.
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