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
复制
发表时间:
2017
影响因子:
2.2
通讯作者:
Hicks L
Hicks L
中科院分区:
地球科学3区
文献类型:
--
作者:
Hicks L

文献摘要

参考文献

被引文献

相似文献

利用同步加速器Fe-K X射线吸收光谱、原位透射式X射线衍射仪和X射线荧光分析仪,以及互补的显微拉曼分析,对星尘任务在气凝胶中收集的81P/Wild 2彗星颗粒的矿物学进行了测定。我们的研究重点是8个星尘轨迹的末端颗粒: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;和C2119,5,190,0,0。三个末端颗粒被鉴定为接近纯的磁铁矿Fe3O4。磁铁矿的存在显示了Wild 2矿物组合与碳质球粒陨石之间的亲缘关系,可能是由于彗星母体中共存的FeNi和铁镁硅酸盐的热液蚀变所致。为了进一步探索这一假说,在距离S−1号6.1公里的地方,用轻气枪将来自CR2陨石(NWA 10256)的粉末物质发射到气凝胶中,然后用与星尘拱心石相同的方法制备拱心石。使用与八个星尘轨迹类似的分析技术,CR2磁铁矿终端颗粒确定了在硅气凝胶捕获过程中保留磁铁矿的可能性。
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.
统一的渗透理论
DOI: 10.1016/0734-743x(87)90041-8
发表时间: 1987
影响因子: 5.1
作者:
J. Dehn
通讯作者: J. Dehn
太阳星云中磁铁矿形成的实验研究
DOI: 10.1111/j.1945-5100.1998.tb01715.x
发表时间: 1998
影响因子: 2.2
作者:
Y. Hong;B. Fegley
通讯作者: B. Fegley
气凝胶中的收集引起的硅酸盐微观结构的改变:实验方法以及与星尘结果的比较
DOI: 10.1111/j.1945-5100.2011.01305.x
发表时间: 2012
影响因子: 2.2
作者:
J. Stodolna;D. Jacob;H. Leroux;M. Burchell
通讯作者: M. Burchell
Krymka LL3.1 球粒陨石中的碳质捕虏体:谜团和既定事实
DOI: 10.1016/j.gca.2004.10.027
发表时间: 2005
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
COMET 81P/WILD2 中太阳系内部物质的混合分数
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