TY - JOUR

T1 - Fe-ni-p-s melt pockets in elga iie iron meteorite

T2 - Evidence for the origin at high-pressures up to 20 gpa

AU - Litasov, Konstantin D.

AU - Teplyakova, Svetlana N.

AU - Shatskiy, Anton

AU - Kuper, Konstantin E.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Here we report new data on high-pressure microstructures in Elga group IIE iron meteorites, made of solidified Fe-Ni-P-S melt pockets and microcrystalline aggregates, which could be formed only at high pressures and temperatures according to the experimental data. The bulk composition of the melt pockets and crystals correspond to the Fe3 P-Fe3 S solid solution with the closure of an immiscibility gap at pressures near 20 GPa in static experiments. Some other melt pockets fit with the Fe2 S-Fe2 P compositions, which could also correspond to high pressures and temperatures. The results suggest a late shock episode during the formation of the IIE iron parent body, which may be prior or due to the final disruption that caused the meteorite arrival to Earth. It also has an important implication to the shock features in other meteorites, such as ureilite.

AB - Here we report new data on high-pressure microstructures in Elga group IIE iron meteorites, made of solidified Fe-Ni-P-S melt pockets and microcrystalline aggregates, which could be formed only at high pressures and temperatures according to the experimental data. The bulk composition of the melt pockets and crystals correspond to the Fe3 P-Fe3 S solid solution with the closure of an immiscibility gap at pressures near 20 GPa in static experiments. Some other melt pockets fit with the Fe2 S-Fe2 P compositions, which could also correspond to high pressures and temperatures. The results suggest a late shock episode during the formation of the IIE iron parent body, which may be prior or due to the final disruption that caused the meteorite arrival to Earth. It also has an important implication to the shock features in other meteorites, such as ureilite.

KW - High-pressure phases

KW - Iron meteorite

KW - Phosphide

KW - Shock metamorphism

KW - Sulfide

KW - phosphide

KW - SYSTEM

KW - MINERALS

KW - STABILITY

KW - POLYMORPH

KW - high-pressure phases

KW - PHASE

KW - EVOLUTION

KW - iron meteorite

KW - BULK MODULUS

KW - sulfide

KW - shock metamorphism

UR - http://www.scopus.com/inward/record.url?scp=85073516215&partnerID=8YFLogxK

U2 - 10.3390/min9100616

DO - 10.3390/min9100616

M3 - Article

AN - SCOPUS:85073516215

VL - 9

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 10

M1 - 616

ER -