The Nature of C Asteroid Regolith Revealed from the Jbilet Winselwan CM ChondriteC-class asteroids frequently exhibit reflectance spectra consistent with thermally metamorphosed carbonaceous chondrites, or a mixture of phyllosilicate-rich material along with regions where they are absent. One particularly important example appears to be asteroid 162173 Ryugu, the target of the Hayabusa 2 mission, although most spectra of Ryugu are featureless, suggesting a heterogeneous regolith. Here we explore an alternative cause of dehydration of regolith of C-class asteroids - impact shock melting. Impact shock melting has been proposed to ex-plain some mineralogical characteristics of CB chondrites, but has rarely been considered a major process for hydrous carbonaceous chondrites.
Document ID
20160011249
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Zolensky, Michael (NASA Johnson Space Center Houston, TX, United States)
Mikouchi, Takashi (Tokyo Univ. Japan)
Hagiya, Kenji (Hyogo Univ. Hyogo, Japan)
Ohsumi, Kazumasa (Japan Synchrotron Research Inst. Hyogo, Japan)
Komatsu, Mutsumi (Graduate Univ. for Advanced Studies (SOKENDAI) Tachikawa, Japan)
Chan, Queenie H. S. (NASA Johnson Space Center Houston, TX, United States)
Le, Loan (Jacobs Technology, Inc. Houston, TX, United States)
Kring, David (Lunar and Planetary Inst. Houston, TX, United States)
Cato, Michael (University of Western Carolina Cullowhee, NC, United States)
Fagan, Amy L. (University of Western Carolina Cullowhee, NC, United States)