Sylvite and halite on particles recovered from 25143 Itokawa: A preliminary report.
Sylvite and halite on particles recovered from 25143 Itokawa: A preliminary report.
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从 25143 Itokawa 回收的颗粒上的钾盐和岩盐：初步报告。
DOI：
10.1111/maps.12333
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发表时间：
2014
影响因子：
2.2
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Noguchi;T.;Kimura;M.;Hashimoto;T.;Konno;M.;Nakamura;T.;Zolensky;M. E.;Tsuchiyama;A.;Matsumoto;T.;Matsuno;J.;Okazaki;R.;Uesugi;M.;Karouji;Y.;Yada;T.;Ishibashi;Y.;Shirai;K.;Abe;M. and Okada;T.
我们使用球差校正 STEM 和传统 TEM 观察了 2010 年隼鸟号航天器从 S 型小行星糸川回收的 12 个粒子表面附近的超薄横截面。尽管它们的矿物学几乎与平衡的 LL 球粒陨石相同，因此基本上是无水的，但在 Itokawa 颗粒 RA-QD02-0034 的表面上发现了微米到亚微米尺寸的钾盐。另外，在 Itokawa 颗粒 RA-QD02-0129 的表面上也发现了微米尺寸的岩盐。对 JAXA 行星材料样品处理设施的样品处理程序的详细检查以及对钾盐和石盐的结构观察表明，在将它们从 JAXA 的 2 号洁净室中取出之前，它们清楚地存在于两个 Itokawa 颗粒上。然而，目前还没有直接证据证明它们来自外星。如果钾盐和石盐是外星物质，它们的存在表明它们在 S 型小行星表面的含量可能比之前认为的更为丰富。
We observed cross sectional ultra‐thin sections near the surface of 12 particles recovered from the S‐type asteroid Itokawa by the Hayabusa spacecraft in 2010, using spherical aberration–corrected STEM and conventional TEM. Although their mineralogy is almost identical to the equilibrated LL chondrites and therefore basically anhydrous, micrometer‐to‐submicrometer‐sized sylvite was identified on the surface of Itokawa particle RA‐QD02‐0034. Separately, micrometer‐sized halite was also identified on the surface of Itokawa particle RA‐QD02‐0129. Detailed inspection of the sample processing procedures at the JAXA's Planetary Materials Sample Curation Facility and textural observation of the sylvite and halite indicate that they were clearly present on two Itokawa particles before they were removed from Clean Chamber #2 at JAXA. However, there is no direct evidence for their extraterrestrial origin at present. If the sylvite and halite are extraterrestrial, their presence suggests that they may be more abundant on the surface of S‐type asteroids than previously thought.