A Low Temperature Transfer of ALH84001 from Mars to Earth-Reference-Cited by-同舟云学术

A Low Temperature Transfer of ALH84001 from Mars to Earth

Published:2000-10-27 Issue:5492 Volume:290 Page:791-795
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Weiss Benjamin P.¹,Kirschvink Joseph L.¹,Baudenbacher Franz J.²,Vali Hojatollah³,Peters Nick T.²,Macdonald Francis A.¹,Wikswo John P.²

Affiliation:

1. Division of Geological and Planetary Sciences, 170-25, California Institute of Technology, Pasadena, CA 91125, USA.

2. Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, Nashville, TN 37235, USA.

3. Electron Microscopy Centre, Department of Anatomy and Cell Biology and Department of Earth and Planetary Sciences, McGill University, 3640 University Street, Montreal QC H3A 2B2, Canada.

Abstract

The ejection of material from Mars is thought to be caused by large impacts that would heat much of the ejecta to high temperatures. Images of the magnetic field of martian meteorite ALH84001 reveal a spatially heterogeneous pattern of magnetization associated with fractures and rock fragments. Heating the meteorite to 40°C reduces the intensity of some magnetic features, indicating that the interior of the rock has not been above this temperature since before its ejection from the surface of Mars. Because this temperature cannot sterilize most bacteria or eukarya, these data support the hypothesis that meteorites could transfer life between planets in the solar system.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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