FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2945047984> ?p ?o ?g. }

• W2945047984 endingPage "108" @default.
• W2945047984 startingPage "101" @default.
• W2945047984 abstract "The origin of variations in 186Os/188Os ratios amongst mantle-derived basaltic and komatiitic lavas remains controversial, with opposing models arguing for deep core-mantle versus shallow mantle sources. Crustal contamination has generally not been favored due to the low Os contents of such sources, meaning that variations in 186Os/188Os would require involvement of extremely high proportions of crustal material. Here we re-examine crustal contamination as an effective means for generating significant 186Os/188Os variations in Earth materials. Using chromitites and peridotites from the Stillwater, Muskox and Rum layered intrusions, we show that radiogenic 186Os/188Os ratios are correlated with 187Os/188Os ratios and can only be explained by shallow-level mixing processes and crustal contamination. The samples have δ186Os ([{(186Os/188Ossample[t]/186Os/188OsPM(t)) − 1} × 1000], where the modern primitive mantle [PM] 186Os/188Os is 0.1198388) values ranging between 0.04 to 0.15 for the ∼2.7 Ga Stillwater Igneous Complex, −0.05 to 0.17 for the ∼1.27 Ga Muskox Intrusion, and 0.02 to 0.13 for the ∼0.06 Ga Rum Layered Suite. The highly siderophile element (HSE: Os, Ir, Ru, Pt, Pd, Re) contents of the chromitites and peridotites can be modeled through high sulfide-melt partitioning (typically >8000) and emphasize the role of S-saturation and HSE scavenging. Considering the high sulfide-melt partitioning and accounting for high silicate melt to sulfide melt ratios (R-factors), it is possible to explain the variations in 186Os–187Os in layered intrusions using calculated Os isotope crustal evolution growth models. These calculations indicate that <4% of ancient high Pt/Os crustal contributions can explain the composition of the chromitites and peridotites that were examined. Our observations are consistent with published models for chromitite genesis that invoke either crustal melt-primitive melt mixing, or cumulate assimilation. A crustal origin for radiogenic 186Os is a possible cause for 186Os/188Os ratio variations observed in some komatiites. It is more difficult to explain radiogenic 186Os/188Os measured in Hawaiian lavas by crustal contamination processes. Instead, ancient high Pt/Os oceanic crust, shallow mantle sources such as metasomatic sulfide, or metal-rich large low-shear wave velocity provinces at the core-mantle boundary, all remain valid explanations." @default.
• W2945047984 created "2019-05-29" @default.
• W2945047984 creator A5026241135 @default.
• W2945047984 creator A5077959259 @default.
• W2945047984 date "2019-08-01" @default.
• W2945047984 modified "2023-10-14" @default.
• W2945047984 title "Ancient high Pt/Os crustal contaminants can explain radiogenic 186Os in some intraplate magmas" @default.
• W2945047984 cites W1498344923 @default.
• W2945047984 cites W1571227429 @default.
• W2945047984 cites W1948669846 @default.
• W2945047984 cites W1977432341 @default.
• W2945047984 cites W1987019489 @default.
• W2945047984 cites W1989996322 @default.
• W2945047984 cites W1990210164 @default.
• W2945047984 cites W1995676738 @default.
• W2945047984 cites W1996279771 @default.
• W2945047984 cites W1999578482 @default.
• W2945047984 cites W2005904488 @default.
• W2945047984 cites W2014413587 @default.
• W2945047984 cites W2015499205 @default.
• W2945047984 cites W2017252180 @default.
• W2945047984 cites W2026913058 @default.
• W2945047984 cites W2034706864 @default.
• W2945047984 cites W2037155919 @default.
• W2945047984 cites W2037706908 @default.
• W2945047984 cites W2041258049 @default.
• W2945047984 cites W2043294776 @default.
• W2945047984 cites W2049891776 @default.
• W2945047984 cites W2057306801 @default.
• W2945047984 cites W2060472760 @default.
• W2945047984 cites W2066267518 @default.
• W2945047984 cites W2081656000 @default.
• W2945047984 cites W2082384972 @default.
• W2945047984 cites W2082737776 @default.
• W2945047984 cites W2104024149 @default.
• W2945047984 cites W2106873077 @default.
• W2945047984 cites W2108570803 @default.
• W2945047984 cites W2109353358 @default.
• W2945047984 cites W2114110021 @default.
• W2945047984 cites W2115303496 @default.
• W2945047984 cites W2119890665 @default.
• W2945047984 cites W2142920053 @default.
• W2945047984 cites W2145586171 @default.
• W2945047984 cites W2151010548 @default.
• W2945047984 cites W2164001559 @default.
• W2945047984 cites W2176219141 @default.
• W2945047984 cites W2176624776 @default.
• W2945047984 cites W2286064960 @default.
• W2945047984 cites W2310849129 @default.
• W2945047984 cites W2313328138 @default.
• W2945047984 cites W2468872158 @default.
• W2945047984 cites W2509840747 @default.
• W2945047984 cites W2562132318 @default.
• W2945047984 cites W2570952755 @default.
• W2945047984 cites W2588200775 @default.
• W2945047984 cites W4252630575 @default.
• W2945047984 doi "https://doi.org/10.1016/j.epsl.2019.04.039" @default.
• W2945047984 hasPublicationYear "2019" @default.
• W2945047984 type Work @default.
• W2945047984 sameAs 2945047984 @default.
• W2945047984 citedByCount "8" @default.
• W2945047984 countsByYear W29450479842020 @default.
• W2945047984 countsByYear W29450479842021 @default.
• W2945047984 countsByYear W29450479842023 @default.
• W2945047984 crossrefType "journal-article" @default.
• W2945047984 hasAuthorship W2945047984A5026241135 @default.
• W2945047984 hasAuthorship W2945047984A5077959259 @default.
• W2945047984 hasBestOaLocation W29450479842 @default.
• W2945047984 hasConcept C127313418 @default.
• W2945047984 hasConcept C147894010 @default.
• W2945047984 hasConcept C151730666 @default.
• W2945047984 hasConcept C161509811 @default.
• W2945047984 hasConcept C16942324 @default.
• W2945047984 hasConcept C17409809 @default.
• W2945047984 hasConcept C2779200986 @default.
• W2945047984 hasConcept C57016615 @default.
• W2945047984 hasConcept C67236022 @default.
• W2945047984 hasConcept C77928131 @default.
• W2945047984 hasConceptScore W2945047984C127313418 @default.
• W2945047984 hasConceptScore W2945047984C147894010 @default.
• W2945047984 hasConceptScore W2945047984C151730666 @default.
• W2945047984 hasConceptScore W2945047984C161509811 @default.
• W2945047984 hasConceptScore W2945047984C16942324 @default.
• W2945047984 hasConceptScore W2945047984C17409809 @default.
• W2945047984 hasConceptScore W2945047984C2779200986 @default.
• W2945047984 hasConceptScore W2945047984C57016615 @default.
• W2945047984 hasConceptScore W2945047984C67236022 @default.
• W2945047984 hasConceptScore W2945047984C77928131 @default.
• W2945047984 hasLocation W29450479841 @default.
• W2945047984 hasLocation W29450479842 @default.
• W2945047984 hasOpenAccess W2945047984 @default.
• W2945047984 hasPrimaryLocation W29450479841 @default.
• W2945047984 hasRelatedWork W1494383921 @default.
• W2945047984 hasRelatedWork W1965872255 @default.
• W2945047984 hasRelatedWork W1987216331 @default.
• W2945047984 hasRelatedWork W2018337696 @default.
• W2945047984 hasRelatedWork W2030364506 @default.
• W2945047984 hasRelatedWork W2123103778 @default.

• next