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Shock experiments in range of 10–45 GPa with small multidomain magnetite in porous targets
Author(s) -
KOHOUT Tomas,
PESONEN Lauri J.,
DEUTSCH Alexander,
WÜNNEMANN Kai,
NOWKA Daniela,
HORNEMANN Ulrich,
HEIKINHEIMO Erkki
Publication year - 2012
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.12003
Subject(s) - porosity , magnetite , pellets , hardening (computing) , mineralogy , materials science , softening , shock (circulatory) , geology , sedimentary rock , composite material , geochemistry , metallurgy , medicine , layer (electronics)
– Physical properties of multidomain magnetite‐bearing porous pellets shocked up to 45 GPa were measured. The results show general magnetic softening as a result of shock. However, a relative magnetic hardening trend and slight magnetic susceptibility decrease is observed with increasing pressure among shocked samples. Initially, the shock also seems to cause a slight decrease in porosity, but at higher shock pressures macroscopic porosity increases progressively in our pellets. The microscopic porosity remains almost unchanged. Since our samples have distinctly higher initial porosity compared with samples used in previous studies, our results may be representative for impacts into highly porous magnetite‐bearing sedimentary or volcanic rocks and are relevant to impacts into such target rocks on Earth and Mars.