Formation of carbonates in the Tatahouine meteorite

被引：49

作者：

Barrat, JA

Gillet, P

Lécuyer, C

Sheppard, SMF

Lesourd, M

机构：

[1] Univ Angers, Geol Lab, F-49045 Angers, France

[2] Ecole Normale Super Lyon, Lab Ctr Terre, CNRS, UMR 5570, F-69364 Lyon 07, France

[3] Ecole Normale Super Lyon, Inst Univ France, F-69364 Lyon 07, France

[4] Fac Med, CNRS, F-49045 Angers, France

[5] Fac Med, Serv Commun Microscopie Elect, F-49045 Angers, France

来源：

SCIENCE | 1998年 / 280卷 / 5362期

关键词：

D O I：

10.1126/science.280.5362.412

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Tatahouine meteorite, in southern Tunisia, shows terrestrial contamination that developed during 63 years of exposure on Earth's surface. Samples collected on the day of the fall in 1931 contained fractures, with no secondary minerals, whereas samples collected in 1994 contain calcite aggregates (70 to 150 micrometers) and rod-shaped forms (100 to 600 nanometers in length and 70 to 80 nanometers in diameter) on the fractures. Carbon isotope analysis of the carbonates within the Tatahouine meteorite [delta(13)C = -2.0 per mil Pee Dee belemnite standard (PDB)] and the underlying ground (delta(13)C = -3.2 per mil PDB) confirm their terrestrial origin.

引用

页码：412 / 414

页数：3

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