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• W2042948853 endingPage "570" @default.
• W2042948853 startingPage "549" @default.
• W2042948853 abstract "The exhumation mechanism of high-pressure (HP) and ultrahigh-pressure (UHP) eclogites formed by the subduction of oceanic crust (hereafter referred to as oceanic eclogites) is one of the primary uncertainties associated with the subduction factory. The phase relations and densities of eclogites with MORB compositions are modelled using thermodynamic calculations over a P–T range of 1–4 GPa and 400–800 °C, respectively, in the NCKFMASHTO (Na2O–CaO–K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3) system. Our modelling suggests that the mineral assemblages, mineral proportions and density of oceanic crust subducted along a cold P–T path are quite different from those of crust subducted along a warm P–T path, and that the density of oceanic eclogites is largely controlled by the stability of low-density hydrous minerals, such as lawsonite, chlorite, glaucophane and talc. Along a cold subduction P–T path with a geotherm of ~6 °C km−1, lawsonite is always present at 1.1 to >4.0 GPa, and chlorite, glaucophane and talc can be stable at pressures of up to 2.3, 2.6 and 3.6 GPa respectively. Along such a P–T path, the density of subducted oceanic crust is always lower than that of the surrounding mantle at depths shallower than 110–120 km (< 3.3–3.6 GPa). However, along a warm subduction P–T path with a geotherm of ~10 °C km−1, the P–T path is outside the stability field of lawsonite, and the hydrous minerals of chlorite, epidote and amphibole break down completely into dry dense minerals at relatively lower pressures of 1.5, 1.85 and 1.9 GPa respectively. Along such a warm subduction P–T path, the subducted oceanic crust becomes denser than the surrounding mantle at depths >60 km (>1.8 GPa). Oceanic eclogites with high H2O content, oxygen fugacity, bulk-rock XMg [ = MgO/(MgO + FeO)], XAl [ = Al2O3/(Al2O3 + MgO + FeO)] and low XCa [ = CaO/(CaO + MgO + FeO + Na2O)] are likely suitable for exhumation, which is consistent with the bulk-rock compositions of the natural oceanic eclogites on the Earth's surface. On the basis of natural observations and our calculations, it is suggested that beyond depths around 110–120 km oceanic eclogites are not light enough and/or there are no blueschists to compensate the negative buoyancy of the oceanic crust, therefore explaining the lack of oceanic eclogites returned from ultradeep mantle (>120 km) to the Earth's surface. The exhumed light–cold–hydrous oceanic eclogites may have decoupled from the top part of the sinking slab at shallow depths in the forearc region and are exhumed inside the serpentinized subduction channel, whereas the dense–hot–dry eclogites may be retained in the sinking slab and recycled into deeper mantle." @default.
• W2042948853 created "2016-06-24" @default.
• W2042948853 creator A5000278014 @default.
• W2042948853 creator A5005075822 @default.
• W2042948853 creator A5012387711 @default.
• W2042948853 creator A5022802222 @default.
• W2042948853 date "2013-03-26" @default.
• W2042948853 modified "2023-10-14" @default.
• W2042948853 title "Exhumation of oceanic eclogites: thermodynamic constraints on pressure, temperature, bulk composition and density" @default.
• W2042948853 cites W124756346 @default.
• W2042948853 cites W1482168892 @default.
• W2042948853 cites W1505596006 @default.
• W2042948853 cites W1511878292 @default.
• W2042948853 cites W1525982392 @default.
• W2042948853 cites W1551106534 @default.
• W2042948853 cites W1552757520 @default.
• W2042948853 cites W1603705388 @default.
• W2042948853 cites W1825505754 @default.
• W2042948853 cites W1830358639 @default.
• W2042948853 cites W1867235778 @default.
• W2042948853 cites W1883021322 @default.
• W2042948853 cites W1900619244 @default.
• W2042948853 cites W1967766896 @default.
• W2042948853 cites W1973345512 @default.
• W2042948853 cites W1975353707 @default.
• W2042948853 cites W1976273059 @default.
• W2042948853 cites W1977950400 @default.
• W2042948853 cites W1978534444 @default.
• W2042948853 cites W1985160890 @default.
• W2042948853 cites W1986663731 @default.
• W2042948853 cites W1993869433 @default.
• W2042948853 cites W1995900655 @default.
• W2042948853 cites W1998426304 @default.
• W2042948853 cites W2002242075 @default.
• W2042948853 cites W2002491258 @default.
• W2042948853 cites W2007277439 @default.
• W2042948853 cites W2010668132 @default.
• W2042948853 cites W2012201259 @default.
• W2042948853 cites W2014845614 @default.
• W2042948853 cites W2016456230 @default.
• W2042948853 cites W2016788188 @default.
• W2042948853 cites W2016935458 @default.
• W2042948853 cites W2017649324 @default.
• W2042948853 cites W2018823072 @default.
• W2042948853 cites W2020264107 @default.
• W2042948853 cites W2031407346 @default.
• W2042948853 cites W2031981361 @default.
• W2042948853 cites W2035045796 @default.
• W2042948853 cites W2039707689 @default.
• W2042948853 cites W2041420592 @default.
• W2042948853 cites W2045287269 @default.
• W2042948853 cites W2047550028 @default.
• W2042948853 cites W2048522653 @default.
• W2042948853 cites W2054493155 @default.
• W2042948853 cites W2059968799 @default.
• W2042948853 cites W2061048095 @default.
• W2042948853 cites W2062221814 @default.
• W2042948853 cites W2065768478 @default.
• W2042948853 cites W2068144534 @default.
• W2042948853 cites W2070520414 @default.
• W2042948853 cites W2071965253 @default.
• W2042948853 cites W2078458138 @default.
• W2042948853 cites W2080613724 @default.
• W2042948853 cites W2082940713 @default.
• W2042948853 cites W2086699346 @default.
• W2042948853 cites W2090531886 @default.
• W2042948853 cites W2095458117 @default.
• W2042948853 cites W2095904732 @default.
• W2042948853 cites W2096160261 @default.
• W2042948853 cites W2100653978 @default.
• W2042948853 cites W2101882551 @default.
• W2042948853 cites W2102249420 @default.
• W2042948853 cites W2105092996 @default.
• W2042948853 cites W2105731467 @default.
• W2042948853 cites W2107837030 @default.
• W2042948853 cites W2108351842 @default.
• W2042948853 cites W2109865402 @default.
• W2042948853 cites W2115691804 @default.
• W2042948853 cites W2116671617 @default.
• W2042948853 cites W2118172271 @default.
• W2042948853 cites W2120200042 @default.
• W2042948853 cites W2120876108 @default.
• W2042948853 cites W2121440949 @default.
• W2042948853 cites W2122927556 @default.
• W2042948853 cites W2128336358 @default.
• W2042948853 cites W2128624170 @default.
• W2042948853 cites W2129143054 @default.
• W2042948853 cites W2132508573 @default.
• W2042948853 cites W2134736498 @default.
• W2042948853 cites W2137588825 @default.
• W2042948853 cites W2137750170 @default.
• W2042948853 cites W2139654255 @default.
• W2042948853 cites W2146803029 @default.
• W2042948853 cites W2148232034 @default.
• W2042948853 cites W2153647299 @default.
• W2042948853 cites W2153838440 @default.
• W2042948853 cites W2155272764 @default.
• W2042948853 cites W2158648190 @default.

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