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• W3176200135 endingPage "106325" @default.
• W3176200135 startingPage "106325" @default.
• W3176200135 abstract "Both slab-derived high-pressure (HP) or ultrahigh-pressure (UHP) aqueous fluids and hydrous melts are important agents for material cycling in subduction zones. Although numerous studies have investigated the genesis of both fluid phases, the temporal–spatial relationship and the chemical difference between aqueous fluids and hydrous melts during subduction-zone metamorphism remain mysterious. In this study, we present detailed petrological and geochemical studies on the UHP eclogites and enclosed epidote-quartz veins in the Dabie terrane (eastern China) to understand the compositions and behaviors of fluids/melts in subduction zones. The eclogites consist mainly of garnet, omphacite, and hydrous minerals (epidote, phengite, and paragonite). Two stages of epidote, including epidote inclusions in omphacite (Ep-in) and porphyroblastic epidote (Ep-p), are recognized in the eclogites. The obviously higher contents of strontium (Sr) and light rare earth elements (LREEs) in Ep-p than in Ep-in demonstrate the previous coexistence of lawsonite and Ep-in. The combination of petrographic analyses, epidote Sr isotopes, and phase equilibria modeling indicates lawsonite in the eclogite breakdown at ~2.2–2.7 GPa and 620–750 °C during the initial exhumation, accompanied by the significant release of H2O-rich fluids. This process led to the growth of Ep-p in eclogite and the precipitation of vein omphacite, quartz, and epidote (Ep-v1). On the other hand, many lines of evidence for partial melting in the eclogites are found, including (1) multiphase solid inclusions (MSIs) of Ky + Kfs ± other phases, which represent the in situ products of phengite partial melting; (2) MSIs of Kfs ± Pl ± Qz, which represent the crystallized products of hydrous melts; and (3) veinlets of Kfs ± Di that crosscut the omphacite. Importantly, the MSIs in texture (1) are exclusively hosted in the Ep-p, which formed by lawsonite breakdown. This distinctive phenomenon indicates that the partial melting of phengite was most likely triggered by the injection of H2O from the lawsonite breakdown (i.e., water-fluxed melting). Phase equilibria modeling suggests that the partial melting of phengite occurred at ~1.5–2.0 GPa and 700–750 °C during the further exhumation stage of the eclogites. The occurrence of Ep (Ep-v2) + Pl + Kfs in the veins indicates that melts derived from the eclogites infiltrated the vein system. The compositions of the fluids and melts are quantitatively constrained using the epidote compositions (Ep-v1 and Ep-v2, respectively) and epidote–fluid/melt partition coefficients. The results indicate that the fluids have trace element patterns similar to those of the melts with high contents of large ion lithophile elements (LILEs), Th, U, Pb, and LREEs. Thus, aqueous fluids have the ability to transfer significant amounts of mobile elements from the slab like the hydrous melts, if the appropriate P–T conditions and chemical characteristics of wallrocks can be satisified. Our study reveals multistage metamorphic-fluid/melt evolution in the UHP eclogites, involving metamorphic dehydration and subsequent partial melting during the exhumation of subducted continental crust. We provide petrological evidence linking fluid liberation to the occurrence of partial melting in eclogites. Moreover, this study indicates that the development of vein systems in HP–UHP rocks may provide high-permeability channels that allow the flow and escape of melts formed during later-stage process. We propose that the occurrence of early-stage dehydration events in deeply subducted slabs facilitates the generation of hydrous melts and their transport in subduction zones." @default.
• W3176200135 created "2021-07-05" @default.
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• W3176200135 date "2021-10-01" @default.
• W3176200135 modified "2023-10-16" @default.
• W3176200135 title "Evolution of fluids and melts in deeply subducted continental crust: Insights from an UHP eclogite–vein system in the Dabie terrane, China" @default.
• W3176200135 cites W1523733318 @default.
• W3176200135 cites W1536496118 @default.
• W3176200135 cites W1847069267 @default.
• W3176200135 cites W1900130984 @default.
• W3176200135 cites W1965434351 @default.
• W3176200135 cites W1968077829 @default.
• W3176200135 cites W1972614550 @default.
• W3176200135 cites W1972909865 @default.
• W3176200135 cites W1977965778 @default.
• W3176200135 cites W1978801698 @default.
• W3176200135 cites W1981278331 @default.
• W3176200135 cites W1983665471 @default.
• W3176200135 cites W1984351481 @default.
• W3176200135 cites W1984990132 @default.
• W3176200135 cites W1988430692 @default.
• W3176200135 cites W1996532328 @default.
• W3176200135 cites W1998885623 @default.
• W3176200135 cites W2002322258 @default.
• W3176200135 cites W2005022719 @default.
• W3176200135 cites W2014845614 @default.
• W3176200135 cites W2017649324 @default.
• W3176200135 cites W2020318458 @default.
• W3176200135 cites W2022628471 @default.
• W3176200135 cites W2027975305 @default.
• W3176200135 cites W2029243975 @default.
• W3176200135 cites W2029602159 @default.
• W3176200135 cites W2034188275 @default.
• W3176200135 cites W2035283420 @default.
• W3176200135 cites W2042816588 @default.
• W3176200135 cites W2049606755 @default.
• W3176200135 cites W2053512394 @default.
• W3176200135 cites W2054312647 @default.
• W3176200135 cites W2060963469 @default.
• W3176200135 cites W2066991357 @default.
• W3176200135 cites W2068957660 @default.
• W3176200135 cites W2069675753 @default.
• W3176200135 cites W2073803629 @default.
• W3176200135 cites W2077276950 @default.
• W3176200135 cites W2079993403 @default.
• W3176200135 cites W2083841543 @default.
• W3176200135 cites W2085275195 @default.
• W3176200135 cites W2087631250 @default.
• W3176200135 cites W2090615171 @default.
• W3176200135 cites W2091735058 @default.
• W3176200135 cites W2093701233 @default.
• W3176200135 cites W2095458117 @default.
• W3176200135 cites W2097142591 @default.
• W3176200135 cites W2100411277 @default.
• W3176200135 cites W2105875032 @default.
• W3176200135 cites W2111451105 @default.
• W3176200135 cites W2116113566 @default.
• W3176200135 cites W2119474517 @default.
• W3176200135 cites W2120210811 @default.
• W3176200135 cites W2121117622 @default.
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• W3176200135 cites W2143699013 @default.
• W3176200135 cites W2149457841 @default.
• W3176200135 cites W2164924649 @default.
• W3176200135 cites W2322045914 @default.
• W3176200135 cites W2325514473 @default.
• W3176200135 cites W2328782933 @default.
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• W3176200135 doi "https://doi.org/10.1016/j.lithos.2021.106325" @default.
• W3176200135 hasPublicationYear "2021" @default.
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