FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2896780610> ?p ?o ?g. }

• W2896780610 endingPage "159" @default.
• W2896780610 startingPage "141" @default.
• W2896780610 abstract "We describe the stratigraphy, age, constituent geochemistry and phenocryst thermobarometry of a closely spaced Holocene tephra couplet from Volcán Melimoyu (VMm), located in the Northern Patagonian Andes. The lower tephra unit (La Junta Tephra, Mm-1) is distinctly banded comprising a dominant lower layer of rhyodacitic (∼70% SiO2) pumiceous ash and lapilli (Mm-1p) that abruptly transitions to a subordinate upper scoriaceous layer (Mm-1s) of basaltic andesite composition (∼53% SiO2). This bimodality within Mm-1 contrasts significantly with the closely overlying Santa Ana Tephra (Mm-2) that has a homogeneous trachyte-dacite (∼63% SiO2) composition and is intermediate between the two magmatic end members of Mm-1. We propose a genetic affiliation between Mm-1 and Mm-2, and that the latter event likely represents a hybridised-remnant of those discrete magmas involved in the earlier Mm-1 eruption. To test this hypothesis we applied whole rock elemental mixing and fractional crystallisation model to reproduce the composition and crystallinity of Mm-2. Results indicate that Mm-2 can be reproduced by mixing ∼70% Mm-1p with ∼30% Mm-1s, with subsequent ∼13% fractional crystallisation of plagioclase, and minor amphibole, orthopyroxene, magnetite and biotite. Equilibrium P-T conditions calculated from Mm-1p phenocrysts point towards magma residency at moderately shallow depths (200–290 MPa, ∼7–10-km depth, 850–1000 °C), whereas Mm-1s phenocrysts indicate higher overall P-T conditions (240–480 MPa, ∼8.5–17-km depth, 1080–1150 °C). P-T conditions determined for Mm-2 (∼290 MPa, ∼10-km depth, 930–1000 °C) are similar to those of Mm-1p. There is no physical and/or geochemical evidence of mafic magma involvement in the Mm-2 eruption. Similar compositionally bimodal tephra are known from other Northern Patagonian Andean centres (i.e. Playas Blanca-Negra Tephra, Antillanca; Lepue Tephra, Michimahuida; Ho and H3 eruptions of Hudson) suggests that the intrusion of mafic magma into more silicic magma bodies is a common occurrence throughout this Andean sector. These widely dispersed, compositionally bimodal tephra not only provide key insights into pre-eruptive magmatic conditions and triggering processes, but can also be readily identified geochemically, and thereby be more fully utilised within future hazard- and paleoenvironmental-related studies." @default.
• W2896780610 created "2018-10-26" @default.
• W2896780610 creator A5002741396 @default.
• W2896780610 creator A5018128116 @default.
• W2896780610 creator A5027029264 @default.
• W2896780610 creator A5040018271 @default.
• W2896780610 creator A5043339677 @default.
• W2896780610 creator A5057709474 @default.
• W2896780610 creator A5062535238 @default.
• W2896780610 creator A5065883472 @default.
• W2896780610 creator A5089655890 @default.
• W2896780610 date "2018-11-01" @default.
• W2896780610 modified "2023-09-23" @default.
• W2896780610 title "A widespread compositionally bimodal tephra sourced from Volcán Melimoyu (44°S, Northern Patagonian Andes): Insights into magmatic reservoir processes and opportunities for regional correlation" @default.
• W2896780610 cites W1557583296 @default.
• W2896780610 cites W1964159244 @default.
• W2896780610 cites W1980232060 @default.
• W2896780610 cites W1991589759 @default.
• W2896780610 cites W1993634957 @default.
• W2896780610 cites W1993931495 @default.
• W2896780610 cites W2014188884 @default.
• W2896780610 cites W2018581667 @default.
• W2896780610 cites W2023563727 @default.
• W2896780610 cites W2035764260 @default.
• W2896780610 cites W2039087883 @default.
• W2896780610 cites W2040092205 @default.
• W2896780610 cites W2040549377 @default.
• W2896780610 cites W2043186094 @default.
• W2896780610 cites W2045764565 @default.
• W2896780610 cites W2052389778 @default.
• W2896780610 cites W2052907351 @default.
• W2896780610 cites W2053932421 @default.
• W2896780610 cites W2054578927 @default.
• W2896780610 cites W2058974445 @default.
• W2896780610 cites W2060665592 @default.
• W2896780610 cites W2062542252 @default.
• W2896780610 cites W2068328265 @default.
• W2896780610 cites W2068556179 @default.
• W2896780610 cites W2068873158 @default.
• W2896780610 cites W2069606144 @default.
• W2896780610 cites W2080434504 @default.
• W2896780610 cites W2080587400 @default.
• W2896780610 cites W2081249292 @default.
• W2896780610 cites W2089641758 @default.
• W2896780610 cites W2092357190 @default.
• W2896780610 cites W2126884832 @default.
• W2896780610 cites W2138522501 @default.
• W2896780610 cites W2157053038 @default.
• W2896780610 cites W2165605448 @default.
• W2896780610 cites W2169084489 @default.
• W2896780610 cites W2201416243 @default.
• W2896780610 cites W2243799563 @default.
• W2896780610 cites W2274738237 @default.
• W2896780610 cites W2292185350 @default.
• W2896780610 cites W2300198198 @default.
• W2896780610 cites W2314527272 @default.
• W2896780610 cites W2474958410 @default.
• W2896780610 cites W2493142590 @default.
• W2896780610 cites W2567917634 @default.
• W2896780610 cites W2596712295 @default.
• W2896780610 cites W2603981417 @default.
• W2896780610 cites W2607483962 @default.
• W2896780610 cites W2611198599 @default.
• W2896780610 cites W2618941993 @default.
• W2896780610 cites W2728414243 @default.
• W2896780610 cites W2742841129 @default.
• W2896780610 cites W2796563914 @default.
• W2896780610 cites W2974884155 @default.
• W2896780610 cites W4245600068 @default.
• W2896780610 cites W4254161593 @default.
• W2896780610 cites W4256502994 @default.
• W2896780610 cites W4385647111 @default.
• W2896780610 cites W785673106 @default.
• W2896780610 doi "https://doi.org/10.1016/j.quascirev.2018.09.034" @default.
• W2896780610 hasPublicationYear "2018" @default.
• W2896780610 type Work @default.
• W2896780610 sameAs 2896780610 @default.
• W2896780610 citedByCount "8" @default.
• W2896780610 countsByYear W28967806102019 @default.
• W2896780610 countsByYear W28967806102020 @default.
• W2896780610 countsByYear W28967806102021 @default.
• W2896780610 countsByYear W28967806102023 @default.
• W2896780610 crossrefType "journal-article" @default.
• W2896780610 hasAuthorship W2896780610A5002741396 @default.
• W2896780610 hasAuthorship W2896780610A5018128116 @default.
• W2896780610 hasAuthorship W2896780610A5027029264 @default.
• W2896780610 hasAuthorship W2896780610A5040018271 @default.
• W2896780610 hasAuthorship W2896780610A5043339677 @default.
• W2896780610 hasAuthorship W2896780610A5057709474 @default.
• W2896780610 hasAuthorship W2896780610A5062535238 @default.
• W2896780610 hasAuthorship W2896780610A5065883472 @default.
• W2896780610 hasAuthorship W2896780610A5089655890 @default.
• W2896780610 hasConcept C11872896 @default.
• W2896780610 hasConcept C120806208 @default.
• W2896780610 hasConcept C125910819 @default.
• W2896780610 hasConcept C127313418 @default.
• W2896780610 hasConcept C151730666 @default.
• W2896780610 hasConcept C161509811 @default.

• next