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| Isotopic evidence for a terrestrial source of organic compounds found in martian meteorites Allan Hills 84001 and Elephant Moraine 79001 |
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| Author(s): Jull AJT, Courtney C, Jeffrey DA, Beck JW |
| Source: SCIENCE Volume: 279 Issue: 5349 Pages: 366-369 Published: JAN 16 1998 |
| Times Cited: 72 References: 35 |
| Abstract: Stepped-heating experiments on martian meteorites Allan Hills 84001 (ALH84001) and Elephant Moraine 79001 (EETA79001) revealed low-temperature (200 to 430 degrees Celsius) fractions with a carbon isotopic composition delta(13)C between -22 and -33 per mil and a carbon-14 content that is 40 to 60 percent of that of modern terrestrial carbon, consistent with a terrestrial origin for most of the organic material. Intermediate-temperature (400 to 600 degrees Celsius) carbonate-rich fractions of ALH84001 have delta(13)C of +32 to 140 per mil with a low carbon-14 content, consistent with an extraterrestrial origin, whereas some of the carbonate fraction of EETA79001 is terrestrial, In addition, ALH84001 contains a small preterrestrial carbon component of unknown origin that combusts at intermediate temperatures. This component is likely a residual acid-insoluble carbonate or a more refractory organic phase. |
| Document Type: Article |
| Language: English |
| Reprint Address: Jull, AJT (reprint author), Univ Arizona, Natl Sci Fdn, Arizona Accelerator Mass Spect Facil, Tucson, AZ 85721 USA |
Addresses:
1. Univ Arizona, Natl Sci Fdn, Arizona Accelerator Mass Spect Facil, Tucson, AZ 85721 USA |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: YT158 |
| ISSN: 0036-8075 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |