FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4288045409> ?p ?o ?g. }

• W4288045409 endingPage "106813" @default.
• W4288045409 startingPage "106813" @default.
• W4288045409 abstract "Ultramafic and carbonate-rich rocks juxtaposed in an oceanic sedimentary mélange that experienced Alpine subduction (Champorcher, Aosta Valley, Italy) show evidence of metasomatic alteration at their contacts. The reactions that occurred at these contacts afford an assessment of the sources and compositions of fluids associated with the alteration, the degree and scale at which these reactions mobilized carbon. At these contacts, carbonate-rich rocks display calcite replacement by diopside and tremolite along foliations and pressure-dissolution planes as the result of decarbonation and/or carbonate dissolution. The associated ultramafic bodies record serpentine replacement by carbonates and formation of metamorphic veins hosting carbonate and carbonate + diopside + chlorite. These two sets of observations point to coeval, coupled decarbonation and carbonation reactions resulting in C mobility along the subduction interface (at about 60 km depth) but conceivably without considerable net loss and large-scale transport. The δ18OV-SMOW values of all the samples analyzed in this study are lower than expected for oceanic protoliths (for marine limestone, carbonate with values of +28 to +30‰; for seafloor ophicarbonate somewhat lower), suggesting pervasive interaction of these rocks with externally derived fluids, as has been observed throughout the region (for calcschists such as the Schistes Lustrés, lowering values to +20 ± 2‰). The calcschist unit at Champorcher has δ18O (+21.9 to +23.6‰) falling into this regionally developed range; however, the other rocks at this locality (carbonate mélange/broken formation, metasomatic rinds, and veins) tend to have lower values (to as low as +13.5‰). These lower values appear to require interaction with a fluid with δ18O lower than that affecting the calcschist on a regional scale and more consistent with derivation from a mafic/ultramafic (ophiolitic) source. Some metamorphic veins showing carbonate δ18O values 1 to 2‰ lower than their hosts and the occurrence of metamorphic veins and metasomatic horizons with anomalously high 87Sr/86Sr point to circulation of isotopically distinct external fluids enriched in radiogenic Sr within the Champorcher suite, perhaps involving a source in devolatilizing terrigenous rocks. Juxtaposition of rocks at scales observed in these mélange units could enhance the mobilization of C via decarbonation reactions if this deformation is accompanied by the infiltration by H2O-rich fluids capable of driving the reaction process. Information regarding the metasomatism within this hybrid carbonate-ultramafic unit bears on the question of C mobilization along subduction interfaces and whether the magnitude of any loss or gain at the scales investigated could significantly influence whole-margin C cycling." @default.
• W4288045409 created "2022-07-27" @default.
• W4288045409 creator A5009264509 @default.
• W4288045409 creator A5015773109 @default.
• W4288045409 creator A5017618631 @default.
• W4288045409 creator A5035607102 @default.
• W4288045409 creator A5044740643 @default.
• W4288045409 creator A5055207532 @default.
• W4288045409 creator A5058712438 @default.
• W4288045409 creator A5066397956 @default.
• W4288045409 date "2022-11-01" @default.
• W4288045409 modified "2023-09-26" @default.
• W4288045409 title "Carbon mobility and exchange in a plate-interface subduction mélange: A case study of meta-ophiolitic rocks in Champorcher Valley, Italian Alps" @default.
• W4288045409 cites W1151548684 @default.
• W4288045409 cites W1481720020 @default.
• W4288045409 cites W153077243 @default.
• W4288045409 cites W1539109984 @default.
• W4288045409 cites W1655500776 @default.
• W4288045409 cites W1721380001 @default.
• W4288045409 cites W1847069267 @default.
• W4288045409 cites W1965050997 @default.
• W4288045409 cites W1966638266 @default.
• W4288045409 cites W1966870578 @default.
• W4288045409 cites W1979417827 @default.
• W4288045409 cites W1997842666 @default.
• W4288045409 cites W1999147496 @default.
• W4288045409 cites W1999323899 @default.
• W4288045409 cites W2002491258 @default.
• W4288045409 cites W2005846056 @default.
• W4288045409 cites W2008281306 @default.
• W4288045409 cites W2012152837 @default.
• W4288045409 cites W2019606633 @default.
• W4288045409 cites W2024483354 @default.
• W4288045409 cites W2025109266 @default.
• W4288045409 cites W2025364748 @default.
• W4288045409 cites W2029195908 @default.
• W4288045409 cites W2029742232 @default.
• W4288045409 cites W2030370657 @default.
• W4288045409 cites W2031981361 @default.
• W4288045409 cites W2034003688 @default.
• W4288045409 cites W2034566821 @default.
• W4288045409 cites W2038075102 @default.
• W4288045409 cites W2038325228 @default.
• W4288045409 cites W2045477941 @default.
• W4288045409 cites W2052847128 @default.
• W4288045409 cites W2052973516 @default.
• W4288045409 cites W2058083832 @default.
• W4288045409 cites W2064245664 @default.
• W4288045409 cites W2071339220 @default.
• W4288045409 cites W2072685698 @default.
• W4288045409 cites W2082009596 @default.
• W4288045409 cites W2091735272 @default.
• W4288045409 cites W2094679907 @default.
• W4288045409 cites W2100653978 @default.
• W4288045409 cites W2110737701 @default.
• W4288045409 cites W2111603720 @default.
• W4288045409 cites W2131817581 @default.
• W4288045409 cites W2135077016 @default.
• W4288045409 cites W2143255710 @default.
• W4288045409 cites W2143324296 @default.
• W4288045409 cites W2164161380 @default.
• W4288045409 cites W2284742500 @default.
• W4288045409 cites W2300910996 @default.
• W4288045409 cites W2327725617 @default.
• W4288045409 cites W2339321558 @default.
• W4288045409 cites W2343144178 @default.
• W4288045409 cites W2469948971 @default.
• W4288045409 cites W2580737982 @default.
• W4288045409 cites W2589502123 @default.
• W4288045409 cites W2606892490 @default.
• W4288045409 cites W2610428826 @default.
• W4288045409 cites W2732171282 @default.
• W4288045409 cites W2793667429 @default.
• W4288045409 cites W2806696847 @default.
• W4288045409 cites W2894264787 @default.
• W4288045409 cites W2894727584 @default.
• W4288045409 cites W2914526866 @default.
• W4288045409 cites W2947227508 @default.
• W4288045409 cites W2969094780 @default.
• W4288045409 cites W2979683701 @default.
• W4288045409 cites W2990456114 @default.
• W4288045409 cites W3000908444 @default.
• W4288045409 cites W3023711217 @default.
• W4288045409 cites W3035935443 @default.
• W4288045409 cites W3041104165 @default.
• W4288045409 cites W3092010446 @default.
• W4288045409 cites W3117188583 @default.
• W4288045409 cites W3122633474 @default.
• W4288045409 cites W3136630285 @default.
• W4288045409 cites W3185200631 @default.
• W4288045409 cites W3187044622 @default.
• W4288045409 cites W3188684023 @default.
• W4288045409 cites W3141301723 @default.
• W4288045409 doi "https://doi.org/10.1016/j.lithos.2022.106813" @default.
• W4288045409 hasPublicationYear "2022" @default.
• W4288045409 type Work @default.
• W4288045409 citedByCount "2" @default.
• W4288045409 countsByYear W42880454092023 @default.

• next