Mineralogy of four Itokawa particles collected from the first touchdown site

DOI: 10.1186/1880-5981-66-124

Authors: Takaaki Noguchi (Ibaraki University, Japan) , John Bridges (University of Leicester, U.K.) , Leon Hicks (University of Leicester, U.K.) , Steve Gurman (University of Leicester, U.K.) , Makoto Kimura (Ibaraki University, Japan) , Takahito Hashimoto (Hitachi High-Technologies Co. Japan) , Mitsuru Konno (Hitachi High-Technologies Co. Japan) , John P Bradley (University of Hawai’i at Manoa, USA.) , Ryuji Okazaki (Kyushu University, USA.) , Masayuki Uesugi (Japan Aerospace Exploration Agency, Japan) , Toru Yada (Japan Aerospace Exploration Agency, Japan) , Yuzuru Karouji , Masanao Abe (Japan Aerospace Exploration Agency, Japan) , Tatsuaki Okada , Takuya Mitsunari (Ibaraki University, Japan) , Tomoki Nakamura (Tohoku University, Japan) , Hiroyuki Kagi (The University of Tokyo, Japan)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Earth, Planets And Space , VOL 66 , PAGES 19608-19617

State: Published (Approved)
Published: October 2014
Diamond Proposal Number(s): 8307

Abstract: Four Itokawa particles collected from the first touchdown site were mineralogically investigated by optical microscopy, micro-Raman (mu-Raman) spectrometry, scanning electron microscopy (SEM), electron microprobe analysis (EPMA), X-ray absorption spectroscopy (XAS), and transmission electron microscopy (TEM). Their mineralogy has an affinity to that of LL6 chondrites based on micro-Raman spectroscopy, EPMA, and XAS analyses. However, the space weathering rims on them are less developed than those observed on the Itokawa particles collected from the second touchdown site. Solar flare tracks are rarely observed in the four particles, whose number densities were lower than those observed in the Itokawa particles from the second touchdown site.

Subject Areas: Earth Science, Physics, Materials


Instruments: I18-Microfocus Spectroscopy

Added On: 27/10/2014 12:32

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