FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2116798903> ?p ?o ?g. }

• W2116798903 endingPage "210" @default.
• W2116798903 startingPage "195" @default.
• W2116798903 abstract "Geologic, chronologic, and U–Th isotope data from Pleistocene–Recent basaltic to rhyolitic lavas and their phenocrysts constrain the long-term evolution of magmatic processes at Seguam Island, Aleutian Island arc, and suggest a model in which erupted magmas were derived from a single, deep seated reservoir for ∼130 kyrs of its eruptive history. The monotonic evolution in (230Th / 232Th)0 ratios is consistent with radiogenic ingrowth of 230Th in a long-lived magma reservoir between 142 and 9 ka. Internal U–Th mineral isochrons from seven lavas and one ignimbrite are indistinguishable from their eruption ages as constrained by 40Ar / 39Ar dating, which implies a short period (i.e., 103 yrs or less) of crystal residence in the magma prior to eruption. These results can be reconciled if small batches of magma are repeatedly extracted from a deep, thermally buffered, basaltic reservoir, followed by decompression-driven crystallization and differentiation in small chambers or conduits in the upper crust immediately prior to eruption. Stratovolcano collapse at 9 ka produced a 4 km diameter caldera and a 70 m thick dacitic ignimbrite covering ∼12 km2. The ignimbrite, as well as subsequent rhyolitic and basaltic lava flows, signal a decrease in (230Th / 232Th)0 and 87Sr / 86Sr ratios. The abrupt change in magma composition at 9 ka most likely reflects disruption of the long-lived reservoir by rapid ascent of basaltic magma with low (230Th / 232Th) and 87Sr / 86Sr ratios and excess 226Ra. While the physiochemical connection between cone collapse and rise of new magma into the shallow crust remains to be explored, the shift in isotopic composition and evidence for a protracted > 100 kyr period of magma storage, would have been missed had the focus been on only the most recent historical eruptions. Our results suggest that: not all arc basalt produced in the mantle wedge separates and ascends rapidly, magma ascent rates and storage times may vary significantly over periods of 104 to 105 yrs at a single arc volcano, and U–Th isotopes offer a means of better understanding relationships between explosive eruptions and changes in magma reservoir dynamics in island arcs, provided a sufficiently long period of volcanic activity is examined." @default.
• W2116798903 created "2016-06-24" @default.
• W2116798903 creator A5000007230 @default.
• W2116798903 creator A5032863816 @default.
• W2116798903 creator A5059228109 @default.
• W2116798903 creator A5068582901 @default.
• W2116798903 date "2005-07-01" @default.
• W2116798903 modified "2023-10-17" @default.
• W2116798903 title "Contrasting timescales of crystallization and magma storage beneath the Aleutian Island arc" @default.
• W2116798903 cites W1967277465 @default.
• W2116798903 cites W1968110912 @default.
• W2116798903 cites W1973382102 @default.
• W2116798903 cites W1979832979 @default.
• W2116798903 cites W1983819867 @default.
• W2116798903 cites W1985451813 @default.
• W2116798903 cites W1995860141 @default.
• W2116798903 cites W1996072627 @default.
• W2116798903 cites W1996303959 @default.
• W2116798903 cites W2001904227 @default.
• W2116798903 cites W2009776043 @default.
• W2116798903 cites W2017684709 @default.
• W2116798903 cites W2018381115 @default.
• W2116798903 cites W2018704618 @default.
• W2116798903 cites W2018975896 @default.
• W2116798903 cites W2040220744 @default.
• W2116798903 cites W2040497595 @default.
• W2116798903 cites W2054013883 @default.
• W2116798903 cites W2062696072 @default.
• W2116798903 cites W2063679898 @default.
• W2116798903 cites W2067221143 @default.
• W2116798903 cites W2075076173 @default.
• W2116798903 cites W2075224085 @default.
• W2116798903 cites W2075759440 @default.
• W2116798903 cites W2094265731 @default.
• W2116798903 cites W2103368609 @default.
• W2116798903 cites W2106574944 @default.
• W2116798903 cites W2123803462 @default.
• W2116798903 cites W2128390854 @default.
• W2116798903 cites W2129569463 @default.
• W2116798903 cites W2131973381 @default.
• W2116798903 cites W2135089711 @default.
• W2116798903 cites W2150495301 @default.
• W2116798903 cites W2158621606 @default.
• W2116798903 cites W2171196304 @default.
• W2116798903 doi "https://doi.org/10.1016/j.epsl.2005.05.002" @default.
• W2116798903 hasPublicationYear "2005" @default.
• W2116798903 type Work @default.
• W2116798903 sameAs 2116798903 @default.
• W2116798903 citedByCount "38" @default.
• W2116798903 countsByYear W21167989032012 @default.
• W2116798903 countsByYear W21167989032013 @default.
• W2116798903 countsByYear W21167989032014 @default.
• W2116798903 countsByYear W21167989032015 @default.
• W2116798903 countsByYear W21167989032016 @default.
• W2116798903 countsByYear W21167989032017 @default.
• W2116798903 countsByYear W21167989032019 @default.
• W2116798903 countsByYear W21167989032020 @default.
• W2116798903 countsByYear W21167989032022 @default.
• W2116798903 crossrefType "journal-article" @default.
• W2116798903 hasAuthorship W2116798903A5000007230 @default.
• W2116798903 hasAuthorship W2116798903A5032863816 @default.
• W2116798903 hasAuthorship W2116798903A5059228109 @default.
• W2116798903 hasAuthorship W2116798903A5068582901 @default.
• W2116798903 hasBestOaLocation W21167989032 @default.
• W2116798903 hasConcept C113754120 @default.
• W2116798903 hasConcept C120806208 @default.
• W2116798903 hasConcept C127313418 @default.
• W2116798903 hasConcept C161509811 @default.
• W2116798903 hasConcept C17409809 @default.
• W2116798903 hasConcept C182402614 @default.
• W2116798903 hasConcept C183222429 @default.
• W2116798903 hasConcept C192241223 @default.
• W2116798903 hasConcept C25822816 @default.
• W2116798903 hasConcept C36986328 @default.
• W2116798903 hasConcept C49708893 @default.
• W2116798903 hasConcept C75268469 @default.
• W2116798903 hasConcept C9566828 @default.
• W2116798903 hasConceptScore W2116798903C113754120 @default.
• W2116798903 hasConceptScore W2116798903C120806208 @default.
• W2116798903 hasConceptScore W2116798903C127313418 @default.
• W2116798903 hasConceptScore W2116798903C161509811 @default.
• W2116798903 hasConceptScore W2116798903C17409809 @default.
• W2116798903 hasConceptScore W2116798903C182402614 @default.
• W2116798903 hasConceptScore W2116798903C183222429 @default.
• W2116798903 hasConceptScore W2116798903C192241223 @default.
• W2116798903 hasConceptScore W2116798903C25822816 @default.
• W2116798903 hasConceptScore W2116798903C36986328 @default.
• W2116798903 hasConceptScore W2116798903C49708893 @default.
• W2116798903 hasConceptScore W2116798903C75268469 @default.
• W2116798903 hasConceptScore W2116798903C9566828 @default.
• W2116798903 hasIssue "1-2" @default.
• W2116798903 hasLocation W21167989031 @default.
• W2116798903 hasLocation W21167989032 @default.
• W2116798903 hasOpenAccess W2116798903 @default.
• W2116798903 hasPrimaryLocation W21167989031 @default.
• W2116798903 hasRelatedWork W1991979602 @default.
• W2116798903 hasRelatedWork W1993306312 @default.
• W2116798903 hasRelatedWork W2007979873 @default.

• next