FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2057820877> ?p ?o ?g. }

• W2057820877 endingPage "542" @default.
• W2057820877 startingPage "530" @default.
• W2057820877 abstract "New, high-precision W isotope data on iron meteorites are presented that provide important constraints on the timing of silicate–metal segregation in planetesimals. Magmatic iron meteorites all have ε182W within error or less radiogenic than initial ε182W estimated by studies of chondritic meteorites. At face value this implies that iron meteorites are as old and older than refractory calcium–aluminium rich inclusions (CAI), which are widely thought to be the oldest solar system objects. Moreover, different meteorites from the same magmatic groups, believed to be derived from the same planetissimal core, display a range of ε182W. We suggest that the paradoxical ε182W values more negative than initial Solar System Initial (SSI) are most readily explained as a result of secondary, spallation reactions with cosmic rays during transit between parent body and the earth. This is supported by the most negative ε182W being found in meteorites with the oldest exposure ages and the magnitude of the effect is shown to be consistent with known nuclear reactions. On the other hand, it is also striking that none of the magmatic iron group meteorites have ε182W analyses, outside error, more radiogenic than the estimated solar system initial ratio. This suggests that core formation in parent bodies of magmatic iron meteorites occurred ≤ 1.5 Myr after the formation age of CAI [Y. Amelin, A.N. Krot, I.D. Hutcheon, and A.A. Ulyanov, Lead isotopic ages of chondrules and calcium-aluminum inclusions, Science 297, 1678–1683, 2002]. This extremely early metal–silicate differentiation is coeval with the first chondrules [M. Bizzarro, J.A. Baker, and H. Haack, Mg isotope evidence for contemporaneous formation of chondrules and refractory inclusions, Nature 431, 275–278, 2004, A.N. Krot, Y. Amelin, P. Cassen, and A. Meibom, Young chondrules in CB chondrites from a giant impact in the early Solar System, Nature 436, 989–992, 2005]. Formation of later chondrules, and hence the parent bodies of some chondritic meteorites, must therefore have occurred in the presence of planetesimals large enough to possess iron cores. We conclude that early planetary accretion and differentiation was sufficiently fast for 26Al-decay to be an important heat source. Non-magmatic iron meteorites, however, display more radiogenic and varied W isotope signatures. This is in keeping with them being generated later, by impact melting during which the metal (partially) re-equilibrated with the then more radiogenic silicate fraction." @default.
• W2057820877 created "2016-06-24" @default.
• W2057820877 creator A5002246981 @default.
• W2057820877 creator A5003481805 @default.
• W2057820877 creator A5035071567 @default.
• W2057820877 creator A5076302211 @default.
• W2057820877 creator A5079327675 @default.
• W2057820877 date "2006-01-01" @default.
• W2057820877 modified "2023-09-27" @default.
• W2057820877 title "Hf–W evidence for rapid differentiation of iron meteorite parent bodies" @default.
• W2057820877 cites W1660739765 @default.
• W2057820877 cites W1965535531 @default.
• W2057820877 cites W1967225568 @default.
• W2057820877 cites W1968799811 @default.
• W2057820877 cites W1974867003 @default.
• W2057820877 cites W1976201010 @default.
• W2057820877 cites W1989354469 @default.
• W2057820877 cites W1996230605 @default.
• W2057820877 cites W1997330871 @default.
• W2057820877 cites W1997588990 @default.
• W2057820877 cites W2000413396 @default.
• W2057820877 cites W2003563858 @default.
• W2057820877 cites W2005425146 @default.
• W2057820877 cites W2007304116 @default.
• W2057820877 cites W2007377514 @default.
• W2057820877 cites W2010369657 @default.
• W2057820877 cites W2011352813 @default.
• W2057820877 cites W2011870553 @default.
• W2057820877 cites W2016922896 @default.
• W2057820877 cites W2018462883 @default.
• W2057820877 cites W2029364414 @default.
• W2057820877 cites W2031047043 @default.
• W2057820877 cites W2031839367 @default.
• W2057820877 cites W2032839573 @default.
• W2057820877 cites W2033223950 @default.
• W2057820877 cites W2034367405 @default.
• W2057820877 cites W2036618850 @default.
• W2057820877 cites W2037706908 @default.
• W2057820877 cites W2038505072 @default.
• W2057820877 cites W2044220799 @default.
• W2057820877 cites W2045566045 @default.
• W2057820877 cites W2052546748 @default.
• W2057820877 cites W2054364473 @default.
• W2057820877 cites W2056474684 @default.
• W2057820877 cites W2059806668 @default.
• W2057820877 cites W2062790251 @default.
• W2057820877 cites W2066837504 @default.
• W2057820877 cites W2068998009 @default.
• W2057820877 cites W2071240432 @default.
• W2057820877 cites W2071411545 @default.
• W2057820877 cites W2071746339 @default.
• W2057820877 cites W2073100644 @default.
• W2057820877 cites W2074267811 @default.
• W2057820877 cites W2083759059 @default.
• W2057820877 cites W2089977123 @default.
• W2057820877 cites W2092106430 @default.
• W2057820877 cites W2092507607 @default.
• W2057820877 cites W2093606800 @default.
• W2057820877 cites W2094550466 @default.
• W2057820877 cites W2095833367 @default.
• W2057820877 cites W2118650276 @default.
• W2057820877 cites W2123628149 @default.
• W2057820877 cites W2126527044 @default.
• W2057820877 cites W2140687484 @default.
• W2057820877 cites W2154351189 @default.
• W2057820877 cites W2159619259 @default.
• W2057820877 cites W2166632770 @default.
• W2057820877 doi "https://doi.org/10.1016/j.epsl.2005.11.025" @default.
• W2057820877 hasPublicationYear "2006" @default.
• W2057820877 type Work @default.
• W2057820877 sameAs 2057820877 @default.
• W2057820877 citedByCount "169" @default.
• W2057820877 countsByYear W20578208772012 @default.
• W2057820877 countsByYear W20578208772013 @default.
• W2057820877 countsByYear W20578208772014 @default.
• W2057820877 countsByYear W20578208772015 @default.
• W2057820877 countsByYear W20578208772016 @default.
• W2057820877 countsByYear W20578208772017 @default.
• W2057820877 countsByYear W20578208772018 @default.
• W2057820877 countsByYear W20578208772019 @default.
• W2057820877 countsByYear W20578208772020 @default.
• W2057820877 countsByYear W20578208772021 @default.
• W2057820877 countsByYear W20578208772022 @default.
• W2057820877 crossrefType "journal-article" @default.
• W2057820877 hasAuthorship W2057820877A5002246981 @default.
• W2057820877 hasAuthorship W2057820877A5003481805 @default.
• W2057820877 hasAuthorship W2057820877A5035071567 @default.
• W2057820877 hasAuthorship W2057820877A5076302211 @default.
• W2057820877 hasAuthorship W2057820877A5079327675 @default.
• W2057820877 hasConcept C10393806 @default.
• W2057820877 hasConcept C116862484 @default.
• W2057820877 hasConcept C121332964 @default.
• W2057820877 hasConcept C127313418 @default.
• W2057820877 hasConcept C130635790 @default.
• W2057820877 hasConcept C151730666 @default.
• W2057820877 hasConcept C165783156 @default.
• W2057820877 hasConcept C17409809 @default.
• W2057820877 hasConcept C2777108582 @default.

• next