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Origin and age of metal veins in Canyon Diablo graphite nodules
Author(s) -
Hilton Connor D.,
Ash Richard D.,
Piccoli Philip M.,
Kring David A.,
McCoy Timothy J.,
Walker Richard J.
Publication year - 2020
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/maps.13464
Subject(s) - meteorite , graphite , kamacite , canyon , metal , crystallization , vein , geology , materials science , astrobiology , metallurgy , chemistry , chondrite , biology , psychology , organic chemistry , geomorphology , psychiatry
Previous studies attributed the origin of metal veins penetrating graphite nodules in the Canyon Diablo IAB main group iron meteorite to condensation from vapor or melting of host metal. Abundances of 16 siderophile elements measured in kamacite within vein and host meteorite are most consistent with an origin by melting of the host metal followed by fractional crystallization of the liquid. The presence of the veins within graphite nodules may be explained by impact, as peak shock temperatures, and thus the most likely areas to undergo metal melting are at metal–graphite interfaces. The origin of the veins is constrained by Re‐Os chronometry to have occurred early (>4 Ga) in solar system history.