Collection and Microanalysis of Antarctic Micrometeorites

Comprehensive Organic Analysis of Antarctic Micrometeorites

Mineralogy and Oxygen Isotopes of Unmelted Antarctic Micrometeorites

Introduction: Cosmic spherules and micrometeor-ites account for the major fraction of extraterrestrial material accreting on the Earth. The amount of mi-crometeorites arrived on the terrestrial surface is up to 16000 ton [1], which is around 10 times as much as that of meteorites. The JARE-39 expedition recovered great amounts of micrometeorites from Kuwagata and Tottuki areas in Antarctica in ...

Immature Carbonaceous Matter in Concordia Antarctic Micrometeorites

Introduction: Antarctic MicroMeteorites (AMMs) represent the dominant source of extraterrestrial matter accreted by Earth today [1]. Some of them are ultracarbonaceous particles (UCAMMs) [2, 3, 4]. Furthermore, AMMs could have played a role in the origin of life on Earth [e.g. 5]. A better knowledge of their constituent carbonaceous matter could thus shed light on the formation of the organic m...

Cai-like Particle among Antarctic Micrometeorites

Introduction: Antarctic micrometeorites (AMMs) are interplanetary dust particles collected in the Antarctic ice cap, and belonging to the size range 25–400 μm [1]. They might represent the bulk of extraterrestrial matter accreting on Earth today [2]. They bear strong resemblances with low petrographic type, hydrous carbonaceous chondrites [1]. Compared to IDPs they lack chondritic porous partic...

The stellar origins of presolar silicates discovered in Antarctic micrometeorites

Yada, F. J. Stadermann, C. Floss, E. Zinner, C. T. Olinger, G. A. Graham, J. P. Bradley, Z. R. Dai, T. Nakamura and T. Noguchi. Lab. Space Sciences, Phys. Dept., Washington Univ., St. Louis, MO 63130-4899, USA. Dept. Earth Planet. Sci., Grad. Sch. Science, Tokyo 113-0033, Japan. Inst. Astron. Astrophys., Academia Sinica, Taipei 106, R.O.C. Los Alamos Nat. Lab., Los Alamos, NM 87545, USA. Inst. ...