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• W3150971808 abstract "Abstract Volcán Quizapu, Chile, is an under-monitored volcano that was the site of two historical eruptions: an effusive eruption in 1846–1847 and a Plinian eruption in 1932, both of which discharged ∼5 km3 (dense rock equivalent) of lava and/or tephra. The majority of material erupted in both cases is trachydacite, nearly identical for each event. We present H2O-saturated, phase equilibrium experiments on this end-member dacite magma, using a pumice sample from the 1932 eruption as the main starting material. At an oxygen fugacity (fO2) of ∼NNO + 0·2 (where NNO is the nickel–nickel oxide buffer), the phase assemblage of An25–30 plagioclase + amphibole + orthopyroxene, without biotite, is stable at 865 ± 10 °C and 110 ± 20 MPa H2O pressure (PH2O), corresponding to ∼4 km depth. At these conditions, experiments also reproduce the quenched glass composition of the starting pumice. At slightly higher PH2O and below 860 °C, biotite joins the equilibrium assemblage. Because biotite is not part of the observed Quizapu phase assemblage, its presence places an upper limit on PH2O. At the determined storage PH2O of ∼110 MPa, H2O undersaturation of the magma with XH2Ofluid = 0·87 would align Ptotal to mineral-based geobarometry estimates of ∼130 MPa. However, XH2Ofluid &lt; 1 is not required to reproduce the Quizapu dacite phase assemblage and compositions. A second suite of experiments at lower fO2 shows that the stability fields of the hydrous silicates (amphibole and biotite) are significantly restricted at NNO – 2 relative to NNO + 0·2. Additional observations of Quizapu lava and pumice samples support the existing hypothesis that rapid pre-eruptive heating drove the effusive 1846–1847 eruption, with important refinements. We demonstrate that microlites in the end-member dacite lavas are consistent with in situ crystallization (during ascent), rather than transfer from an andesite. In one end-member dacite lava, newly identified reverse zoning in orthopyroxene and incipient destabilization of amphibole are consistent with small degrees of heating. Our work articulates a clear direction for future Quizapu studies, which are warranted given the active nature of the Cerro Azul–Descabezado Grande volcanic axis." @default.
• W3150971808 created "2021-04-13" @default.
• W3150971808 creator A5000198125 @default.
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• W3150971808 date "2021-03-26" @default.
• W3150971808 modified "2023-10-18" @default.
• W3150971808 title "Experimental Constraints on Dacite Magma Storage beneath Volcán Quizapu, Chile" @default.
• W3150971808 cites W1508004464 @default.
• W3150971808 cites W1603894573 @default.
• W3150971808 cites W1610447046 @default.
• W3150971808 cites W1846057075 @default.
• W3150971808 cites W1968681946 @default.
• W3150971808 cites W1972275555 @default.
• W3150971808 cites W1982724469 @default.
• W3150971808 cites W1986360854 @default.
• W3150971808 cites W1988269975 @default.
• W3150971808 cites W1988339658 @default.
• W3150971808 cites W1991633650 @default.
• W3150971808 cites W1995069949 @default.
• W3150971808 cites W1996089667 @default.
• W3150971808 cites W2002132035 @default.
• W3150971808 cites W2003541641 @default.
• W3150971808 cites W2003809497 @default.
• W3150971808 cites W2012179736 @default.
• W3150971808 cites W2013282641 @default.
• W3150971808 cites W2016641925 @default.
• W3150971808 cites W2016875897 @default.
• W3150971808 cites W2017875459 @default.
• W3150971808 cites W2018050219 @default.
• W3150971808 cites W2020956696 @default.
• W3150971808 cites W2022006623 @default.
• W3150971808 cites W2027663896 @default.
• W3150971808 cites W2029880158 @default.
• W3150971808 cites W2033971335 @default.
• W3150971808 cites W2035297658 @default.
• W3150971808 cites W2035534401 @default.
• W3150971808 cites W2036459553 @default.
• W3150971808 cites W2040549377 @default.
• W3150971808 cites W2041402580 @default.
• W3150971808 cites W2045764565 @default.
• W3150971808 cites W2052389778 @default.
• W3150971808 cites W2059811363 @default.
• W3150971808 cites W2060588282 @default.
• W3150971808 cites W2060760993 @default.
• W3150971808 cites W2071329652 @default.
• W3150971808 cites W2072536276 @default.
• W3150971808 cites W2073113143 @default.
• W3150971808 cites W2080296657 @default.
• W3150971808 cites W2083807101 @default.
• W3150971808 cites W2085177845 @default.
• W3150971808 cites W2097386223 @default.
• W3150971808 cites W2098806427 @default.
• W3150971808 cites W2099401875 @default.
• W3150971808 cites W2104721638 @default.
• W3150971808 cites W2105662998 @default.
• W3150971808 cites W2127161778 @default.
• W3150971808 cites W2129273116 @default.
• W3150971808 cites W2139200455 @default.
• W3150971808 cites W2141890535 @default.
• W3150971808 cites W2142062379 @default.
• W3150971808 cites W2143060221 @default.
• W3150971808 cites W2156951959 @default.
• W3150971808 cites W2158093609 @default.
• W3150971808 cites W2163780153 @default.
• W3150971808 cites W2165605448 @default.
• W3150971808 cites W2171112412 @default.
• W3150971808 cites W2174114070 @default.
• W3150971808 cites W2319555640 @default.
• W3150971808 cites W2321979394 @default.
• W3150971808 cites W2322602907 @default.
• W3150971808 cites W2325758656 @default.
• W3150971808 cites W2327887782 @default.
• W3150971808 cites W2330476109 @default.
• W3150971808 cites W2342456600 @default.
• W3150971808 cites W2356162560 @default.
• W3150971808 cites W2387013829 @default.
• W3150971808 cites W2466399683 @default.
• W3150971808 cites W2529108865 @default.
• W3150971808 cites W2555047160 @default.
• W3150971808 cites W2616748900 @default.
• W3150971808 cites W2617396362 @default.
• W3150971808 cites W267837023 @default.
• W3150971808 cites W2759029469 @default.
• W3150971808 cites W2765792441 @default.
• W3150971808 cites W2795783607 @default.
• W3150971808 cites W2969389375 @default.
• W3150971808 cites W2999360083 @default.
• W3150971808 cites W3037527906 @default.
• W3150971808 cites W3092079782 @default.
• W3150971808 cites W903179410 @default.
• W3150971808 doi "https://doi.org/10.1093/petrology/egab027" @default.
• W3150971808 hasPublicationYear "2021" @default.
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