Magnetite in Comet Wild 2: Evidence for parent body aqueous alteration
Magnetite in Comet Wild 2: Evidence for parent body aqueous alteration
复制标题
狂野彗星 2 号中的磁铁矿:母体水体改变的证据
DOI:
10.1111/maps.12909
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发表时间:
2017
影响因子:
2.2
通讯作者:
Hicks L
中科院分区:
文献类型:
--
作者:
Hicks L
The mineralogy of comet 81P/Wild 2 particles, collected in aerogel by the Stardust mission, has been determined using synchrotron Fe‐K X‐ray absorption spectroscopy with in situ transmission XRD and X‐ray fluorescence, plus complementary microRaman analyses. Our investigation focuses on the terminal grains of eight Stardust tracks: C2112,4,170,0,0; C2045,2,176,0,0; C2045,3,177,0,0; C2045,4,178,0,0; C2065,4,187,0,0; C2098,4,188,0,0; C2119,4,189,0,0; and C2119,5,190,0,0. Three terminal grains have been identified as near pure magnetite Fe3O4. The presence of magnetite shows affinities between the Wild 2 mineral assemblage and carbonaceous chondrites, and probably resulted from hydrothermal alteration of the coexisting FeNi and ferromagnesian silicates in the cometary parent body. In order to further explore this hypothesis, powdered material from a CR2 meteorite (NWA 10256) was shot into the aerogel at 6.1 km s−1, using a light‐gas gun, and keystones were then prepared in the same way as the Stardust keystones. Using similar analysis techniques to the eight Stardust tracks, a CR2 magnetite terminal grain establishes the likelihood of preserving magnetite during capture in silica aerogel.
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影响因子:
5.1
作者:
J. Dehn
通讯作者:
J. Dehn
影响因子:
2.2
作者:
Y. Hong;B. Fegley
通讯作者:
B. Fegley
影响因子:
2.2
作者:
J. Stodolna;D. Jacob;H. Leroux;M. Burchell
通讯作者:
M. Burchell
影响因子:
5
作者:
V. Semenenko;E. Jessberger;M. Chaussidon;I. Weber;T. Stephan;C. Wies
通讯作者:
C. Wies
DOI:
10.1088/0004-637x/694/1/18
发表时间:
2009
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Westphal;S. Fakra;Z. Gainsforth;M. Marcus;R. Ogliore;A. Butterworth
通讯作者:
A. Butterworth