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Table 1. List of Antarctic micrometeorites studied in this work.

From: Single grain noble gas analysis of Antarctic micrometeorites by stepwise heating method with a newly constructed miniature furnace

Sample No.

size μm

Weight μg

Mineral composition

SEM chemical composition

D03IB05

114 × 96

0.83 ± 0.12

Olivine, Pyroxene, Pyrrhotite and Magnetite

Chondritic

D03IB10

113 × 81

0.33 ± 0.15

Olivine, Pyroxene, Pyrrhotite and Magnetite (anhydrous)

Al-poor

D03IB18

112 × 73

0.26 ± 0.20

Olivine, Pyroxene, Pyrrhotite, Magnetite and Magnesio-wustite

Chondritic

D03IB19

147 × 66

0.14 ± 0.18

Amorphous-rich

Ca-poor

D03IB30

143 × 68

not measured

Olivine, Pyrrhotite and Magnetite

C-rich

D03IB45

131 × 109

0.48 ± 0.18

Olivine, Pyroxene, Pyrrhotite and Magnetite

Chondritic

D05IB20

84 × 67

0.42 ± 0.12

Olivine, Pyroxene, Pyrrhotite and Magnetite

Ca-poor

D05IB27

276 × 214

18.5 ± 0.24

Olivine, Pyrrhotite and Magnetite

Chondritic

D05IB58

87 × 66

0.21 ± 0.09

Olivine, Pyrrhotite and Magnetite

Ca-poor

D05IB74

130 × 119

1.03 ± 0.15

Olivine, Pyrrhotite, Magnetite and Saponite (hydrated)

Chondritic