Calcium-aluminum-rich inclusions from enstatite chondrites: Indigenous or foreign?

被引：61

作者：

Guan, YB ^{[1
]}

Huss, GR

MacPherson, GJ

Wasserburg, GJ

机构：

[1] Smithsonian Inst, Natl Museum Nat Hist, Dept Mineral Sci, Washington, DC 20560 USA

[2] CALTECH, Div Geol & Planetary Sci 170 25, Lunat Asylum, Pasadena, CA 91125 USA

[3] Arizona State Univ, Ctr Meteorite Studies, Tempe, AZ 85287 USA

[4] Arizona State Univ, Dept Geol, Tempe, AZ 85287 USA

来源：

SCIENCE | 2000年 / 289卷 / 5483期

关键词：

D O I：

10.1126/science.289.5483.1330

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 primary mineral assemblages and initial Al-26/Al-27 ratios of rare calcium-aluminum-rich inclusions (CAIs) from enstatite (E) chondrites are similar to those of CAIs from other chondrite classes. CAIs from all chondrite classes formed under oxidizing conditions that are much different from the reducing conditions under which the E chondrites formed. Either CAIs formed at an earlier, more oxidizing epoch in the region where E chondrites ultimately formed, or they formed at a different place in the solar nebula and were transported into the E chondrite formation region.

引用

页码：1330 / 1333

页数：4

共 21 条

[1] Bischoff A., 1985, CHEM ERDE-GEOCHEM, V44, P97
[2] Brearley A., 1998, REV MINERAL, V36
[3] Fahey A. J., 1988, THESIS WASHINGTON U
[4] AL-26, PU-244, TI-50, REE, AND TRACE-ELEMENT ABUNDANCES IN HIBONITE GRAINS FROM CM AND CV METEORITES
FAHEY, AJ
GOSWAMI, JN
MCKEEGAN, KD
ZINNER, E
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1987, 51 (02) : 329 - 350
[5] Grossman J. N., 1993, METEORITICS, V28, P358
[6] FUN WITH PANURGE - HIGH MASS RESOLUTION ION MICROPROBE MEASUREMENTS OF MG IN ALLENDE INCLUSIONS
HUNEKE, JC
ARMSTRONG, JT
WASSERBURG, GJ
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1983, 47 (09) : 1635 - 1650
[7] HIBONITE-BEARING MICROSPHERULES - A NEW TYPE OF REFRACTORY INCLUSIONS WITH LARGE ISOTOPIC ANOMALIES
IRELAND, TR
FAHEY, AJ
ZINNER, EK
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1991, 55 (01) : 367 - 379
[8] ENSTATITE METEORITES AND THEIR PARENT BODIES
KEIL, K
[J]. METEORITICS, 1989, 24 (04): : 195 - 208
[9] ROLE OF CARBON AND OXYGEN IN COSMIC GASES - SOME APPLICATIONS TO THE CHEMISTRY AND MINERALOGY OF ENSTATITE CHONDRITES
LARIMER, JW
BARTHOLOMAY, M
[J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1979, 43 (09) : 1455 - 1466
[10] DEMONSTRATION OF MG-26 EXCESS IN ALLENDE AND EVIDENCE FOR AL-26
LEE, T
PAPANASTASSIOU, DA
WASSERBURG, GJ
[J]. GEOPHYSICAL RESEARCH LETTERS, 1976, 3 (02) : 109 - 112

← 1 2 3 →