Pre-eruptive Conditions of the Huerto Andesite (Fish Canyon System, San Juan Volcanic Field, Colorado): Influence of Volatiles (C-O-H-S) on Phase Equilibria and Mineral Composition

Parat, Fleurice; Holtz, François; Feig, Sandrin T.

doi:10.1093/petrology/egn011

Cited by 54 publications

(5 citation statements)

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“… Plots of oxide abundances (in wt%, on water‐free basis) and Mg# in amphibole against temperature and pressure for melt‐peridotite reaction experiments from this study, Sen and Dunn (1994, SD94) and phase equilibrium experiments on mantle compositions (Phase equilibria 1: Fumagalli et al., 2009, 2017; D. H. Green et al., 2014; Grove et al., 2006; Mallik et al., 2015; Mandler & Grove, 2016; Mengel & Green, 1989; Niida & Green, 1999; Wallace & Green, 1991) and basalt to dacite compositions (Phase equilibria 2: Alonso‐Perez et al., 2009; Blatter et al., 2013; Costa et al., 2004; Feig et al., 2006; Foden & Green, 1992; Gardner et al., 1995; T. H. Green and Pearson, 1985; Grove et al., 1997, 2003; Holtz et al., 2004; Kawamoto, 1996; Latourrette et al., 1995; Mercer & Johnston, 2008; Moore & Carmichael, 1998; Nandedkar et al., 2014, 2016; Nekvasil et al., 2004; Nicholls & Harris, 1980; Parat et al., 2008; Pichavant et al., 2002; Pietranik et al., 2009; Pilet et al., 2010; Prouteau & Scaillet, 2003; Sato et al., 2005). Compositional range of amphiboles in each experiment from this study are shown as bars at temperature and pressure of the final stage (880°C and 0.8 GPa).…”

Section: Discussionmentioning

confidence: 99%

Formation of Amphibole‐Bearing Peridotite and Amphibole‐Bearing Pyroxenite Through Hydrous Melt‐Peridotite Reaction and In Situ Crystallization: An Experimental Study

Wang

Liang

2021

JGR Solid Earth

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Section: Discussionmentioning

confidence: 99%

Formation of Amphibole‐Bearing Peridotite and Amphibole‐Bearing Pyroxenite Through Hydrous Melt‐Peridotite Reaction and In Situ Crystallization: An Experimental Study

Wang

Liang

2021

JGR Solid Earth

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“…Rainier (Venezky & Rutherford, ), Santorini (Andújar et al, ). Tungurahura (Andújar et al, ), and Fish Canyon (Parat et al, ). (right) For Dacites; Nevado de Toluca (Arce et al, , ), Novarupta (Coombs & Gardner, ; Hammer et al, ), San Pedro (Costa, ), Santorini (Cadoux et al, ), Mt St Helens (Rutherford & Devine, ), Aniakchak (Larsen, ), Black Butte (McCanta et al, ), Pinatubo (Scaillet & Evans, ), Unzen (Botcharnikov et al, ; Holtz et al, ), Santa Maria (Andrews, ), Fish Canyon (Caricchi & Blundy, ), Cerro Uturuncu (Muir et al, ), Kizimen (Browne et al, ), Bezymianny (Shcherbakov et al, ), Quizapu (First et al, ).…”

Section: Discussionmentioning

confidence: 99%

Explosive Eruptions With Little Warning: Experimental Petrology and Volcano Monitoring Observations From the 2014 Eruption of Kelud, Indonesia

Cassidy

Ebmeier

Helo

et al. 2019

Geochem Geophys Geosyst

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Explosive eruptions that occur with little or no precursory unrest (less than a month) pose the greatest hazards from volcanoes to nearby populations. Here we focus on the preeruptive conditions for these explosive events, their triggers and how these eruptions evolve. We concentrate on Kelud volcano, where we have conducted a set of petrological experiments to understand preeruptive storage conditions for several recent eruptions. For the 2014 explosive eruption, we combine this with an analysis of interferometric synthetic aperture radar measured deformation. Our data suggest that both explosive and effusive eruptions at Kelud are sourced from a magma storage system at 2–4 km. However, explosive eruptions are fed by magma stored under relatively cool (~1000 °C) and water‐saturated conditions, whereas effusive eruptions are fed by slightly hotter (~1050 °C), water‐undersaturated magmas. We propose that the initial phase of the 2014 eruption was triggered by volatile overpressure, which then fostered top‐down decompression tapping discrete magma bodies. By compiling a global data set of monitoring signatures of explosive eruptions, we show that the onset of unrest rarely points to the shallow ascent of magma to the surface, as ascent mostly occurs in a matter of hours or minutes. We relate the timescale of preeruptive unrest to eruption triggering mechanisms, with yearly/decadal periods of unrest relating to magma injection events (which may or may not precede a magmatic eruption), whereas internal triggering (e.g., second boiling) of an already present, cooling magma body can lead to explosive eruptions with little warning.

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“…According to studies, the main factor causing mineralization is the high oxygen fugacity of the magma (Sillitoe, 2010;Zhang et al, 2022;He et al, 2023). Numerous studies have shown that the ability of magma to S is proportional to the oxygen fugacity, and the content of S in magma determines whether it is mineralized (Parat et al, 2008;Botcharnikov et al, 2011;Hu et al, 2023). Therefore, the magma oxygen fugacity positively correlated with the mineralization capacity.…”

Section: Indication To the Evolution Of The Shallow Magma Chambermentioning

confidence: 99%

Geochronology, Geochemistry, and Implications of Aplite Dyke in the Giant Jiama Porphyry Copper System, Tibet

Tang

Lin

et al. 2023

Acta Geologica Sinica (Eng)

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Jiama is a giant, high‐grade porphyry copper system in the Gangdese metallogenic belt, Tibet. Multistage intermediate‐felsic porphyries intruded in this deposit, some of which are strongly associated with copper–polymetallic mineralization. These ore‐bearing porphyries include monzogranite, granodiorite, and quartz diorite porphyries. A new granite aplite dyke was found in the south of Jiama. Its age, genesis, and relationship with ore‐related magmatism are obscure. Here, its emplacement age and petrogenesis were determined using mineralogy, zircon U–Pb dating, geochemistry, and Sr–Nd–Pb isotope studies. The zircon LA–ICP–MS U–Pb age of the aplite dyke is 16.66 ± 0.21 Ma (n = 14, MSWD = 0.66), earlier than that of the ore‐bearing porphyries (∼15 Ma) in Jiama. Furthermore, the aplite exhibits high amounts of silicon (SiO2 = 73.39%–74.74%), potassium (K2O = 5.12%–6.61%), aluminum (Al2O3 = 14.25%–14.69%), and light/heavy rare earth elements (LREE/HREE = 12.12–16.19) as well as negative europium (δEu = 0.47–0.72) and weak negative cerium anomalies (δCe = 0.84–0.93). The aplite dyke is characteristic of metaluminous–peraluminous I‐type granite, which is rich in large‐ion lithophile elements (Rb, Ba, Th, and U) and depleted in high‐field‐strength elements (Nb, P, and Ti). The aplite dyke and ore‐bearing porphyries in the Jiama deposit are the results of a partial melting of the juvenile lower crust, according to whole‐rock geochemistry and Sr–Nd–Pb isotope data, but the dyke and ore‐bearing porphyries were emplaced from the same magma chamber at different times. Thus, the aplite dyke shows the composition of the early evolution stage of shallow magma in the Jiama deposit and is the product of rapid condensation and crystallization.

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Pre-eruptive Conditions of the Huerto Andesite (Fish Canyon System, San Juan Volcanic Field, Colorado): Influence of Volatiles (C-O-H-S) on Phase Equilibria and Mineral Composition

Cited by 54 publications

References 53 publications

Formation of Amphibole‐Bearing Peridotite and Amphibole‐Bearing Pyroxenite Through Hydrous Melt‐Peridotite Reaction and In Situ Crystallization: An Experimental Study

Formation of Amphibole‐Bearing Peridotite and Amphibole‐Bearing Pyroxenite Through Hydrous Melt‐Peridotite Reaction and In Situ Crystallization: An Experimental Study

Explosive Eruptions With Little Warning: Experimental Petrology and Volcano Monitoring Observations From the 2014 Eruption of Kelud, Indonesia

Geochronology, Geochemistry, and Implications of Aplite Dyke in the Giant Jiama Porphyry Copper System, Tibet

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