Characterization of preserved primitive fine-grained material from the Jupiter family comet 81P/Wild 2 - A new link between comets and CP-IDPs

被引：20

作者：

Stodolna, Julien ^{[1
]}

Gainsforth, Zack ^{[1
]}

Butterworth, Anna L. ^{[1
]}

Westphal, Andrew J. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2014年 / 388卷

关键词：

comet dust; electron microscopy; pyroxene; Stardust; interplanetary dust particles; INTERPLANETARY DUST; MELTED GRAINS; STARDUST; MINERALOGY; PARTICLES; TEM; FRAGMENTS; CHONDRULE; PETROLOGY; PYROXENE;

D O I：

10.1016/j.epsl.2013.12.018

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：

We report the presence of preserved primitive fine-grained material containing an enstatite whisker with the crystallographic characteristics of a primary condensate in a sample of the Jupiter-family comet Wild 2, returned to earth by NASA's Stardust mission. The preserved primitive material is composed of silica-rich amorphous material embedded with iron sulfides and silicates. It is in close association with a type II chondrule-like object in the track C2052,2,74 (Ogliore et al., 2012). The close association of a chondrule and a primary condensate shows they must have formed in different environments and probably met in the comet-forming region. The first observation of an enstatite whisker with properties indicating primary condensation in a comet is a new link between comets and Chondritic Porous IDPs (CP-IDPs). (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：367 / 373

页数：7

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