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- W2005097427 abstract "The Bündnerschiefer of the Swiss-Italian Alps is a large sedimentary complex deposited on the Piemonte–Liguria and Valais oceans and associated continental margins from the upper Jurassic to Eocene. It is made of a large variety of sequences associated or not with an ophiolitic basement. The Bündnerschiefer makes an accretionary prism that developed syn-tectonically from the onset of alpine subduction, and it records orogenic metamorphism following episodes of HP metamorphism. The Bündnerschiefer shares important similarities with the Otago schists of New Zealand and with the Wepawaug schists of Connecticut, both of which form accretionary prisms and have an orogenic metamorphic imprint. With the aim of testing the hypothesis of mobility of chemical components as a function of metamorphic grade, in this work I present fifty-five bulk chemical analyses of various lithological facies of the Bündnerschiefer collected along the well-studied field gradient of the Lepontine dome of Central Switzerland, in the Prättigau half window of East Switzerland, and in the Tsaté Nappe of Valle d'Aosta (Italy). The dataset includes the concentration of major components, large ion lithophile elements (Rb, Sr, Ba, Cs), high field strength elements (Zr, Ti, Nb, Th, U, Ta, Hf), fluid-mobile light elements (B, Li), volatiles (CO2, S), REEs, and Y, V, Cr, Co, Sn, Pb, Cu, Zn, Tl, Sb, Be, and Au. These data are compared against the compositions of the global marine sediment reservoir, typical crustal reservoirs, and against the previously measured compositions of Otago and Wepawaug schists. Results reveal that, irrespective of their metamorphic evolution, the bulk chemical compositions of orogenic metasediments are characterized by mostly constant compositional ratios (e.g., K2O/Al2O3, Ba/Al2O3, Sr/CaO, etc.), whose values in most cases are undistinguishable from those of actual marine sediments and other crustal reservoirs. For these rocks, only volatile concentrations decrease dramatically as a function of metamorphic temperature, and significant deviations from the reservoir signatures are evident for SiO2, B, and Li. These results are interpreted as an indication of residual enrichment in the sediments, a process taking place during syn-metamorphic dehydration from the onset of metamorphism in a regime of chemical immobility. Residual enrichment increased the absolute concentrations of the chemical components of these rocks, but did not modify significantly their fundamental ratios. This poor compositional modification of the sediments indicates that orogenic metamorphism in general does not promote significant mass transfer from accretionary prisms. In contrast, mass transfer calculations carried out in a shear zone crosscutting the Bündnerschiefer shows that significant mass transfer occurs within these narrow zones, resulting in gains of H2O, SiO2, Al2O3, K2O, Ba, Y, Rb, Cu, V, Tl, Mo, and Ce during deformation and loss of Na2O, CO2, S, Ni, B, U, and Pb from the rock. These components were presumably transported by an aquo-carbonic fluid along the shear zone. These distinct attitudes to mobilize chemical elements from orogenic sediments may have implications for a potentially large number of geochemical processes in active continental margins, from the recycling of chemical components at plate margins to the genesis of hydrothermal ore deposits." @default.
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- W2005097427 date "2012-01-01" @default.
- W2005097427 modified "2023-09-27" @default.
- W2005097427 title "The composition of Alpine marine sediments (Bündnerschiefer Formation, W Alps) and the mobility of their chemical components during orogenic metamorphism" @default.
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- W2005097427 cites W1880555926 @default.
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- W2005097427 cites W1966764996 @default.
- W2005097427 cites W1966799498 @default.
- W2005097427 cites W1969598356 @default.
- W2005097427 cites W1974231939 @default.
- W2005097427 cites W1975546571 @default.
- W2005097427 cites W1975757281 @default.
- W2005097427 cites W1979790829 @default.
- W2005097427 cites W1981914011 @default.
- W2005097427 cites W1992933809 @default.
- W2005097427 cites W1998707404 @default.
- W2005097427 cites W2000310043 @default.
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- W2005097427 cites W2034012268 @default.
- W2005097427 cites W2035283420 @default.
- W2005097427 cites W2046166301 @default.
- W2005097427 cites W2049386485 @default.
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- W2005097427 cites W2073638697 @default.
- W2005097427 cites W2074539112 @default.
- W2005097427 cites W2076451718 @default.
- W2005097427 cites W2080048493 @default.
- W2005097427 cites W2080843712 @default.
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- W2005097427 cites W2113315111 @default.
- W2005097427 cites W2118755672 @default.
- W2005097427 cites W2145401399 @default.
- W2005097427 cites W2152195282 @default.
- W2005097427 cites W2155272764 @default.
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- W2005097427 cites W2973549452 @default.
- W2005097427 cites W3033618948 @default.
- W2005097427 doi "https://doi.org/10.1016/j.lithos.2011.10.009" @default.
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