ACFER-094, A UNIQUELY PRIMITIVE CARBONACEOUS CHONDRITE FROM THE SAHARA

被引：88

作者：

NEWTON, J

BISCHOFF, A

ARDEN, JW

FRANCHI, IA

GEIGER, T

GRESHAKE, A

PILLINGER, CT

机构：

[1] INST PLANETOL,D-48149 MUNSTER,GERMANY

[2] UNIV OXFORD,DEPT EARTH SCI,OXFORD OX1 3PR,ENGLAND

来源：

METEORITICS | 1995年 / 30卷 / 01期

关键词：

D O I：

10.1111/j.1945-5100.1995.tb01211.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The Saharan meteorite Acfer 094 is a unique type of carbonaceous chondrite. Mineralogical and petrological considerations and O isotopes are unable to distinguish unambiguously between a CO3 vs. CM2 classification. The other important light elements, C and N, have systematics that do not match any previously recognised meteorite group. Particularly important in this respect is the very low C/N ratio and delta C-13 of the macromolecular C. Acfer 094 has more diamond and SiC, especially X type grains, than any other specimen studied, suggesting minimal thermal or aqueous processing to decrease its very primitive status.

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页码：47 / 56

页数：10

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