PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n“Almost all CM chondrites experienced varying degrees of interaction between anhydrous phases and liquid water (aqueous alteration) and thermal metamorphism [1, 2]. Reflectance spectra of the asteroid Ryugu that has been explored by Hayabusa 2 spacecraft suggest that the surface of Ryugu experienced partial dehydration due to thermal metamorphism and\/or shock heating [3, 4]. It is also pointed out that Ryugu may consist of carbon-rich, partially hydrated, possibly comet-like material [4]. In addition, it is worthwhile to examine the possibility if the surface material experienced weak aqueous alteration. Therefore, it is important to understand CM chondrites that experienced an early stage of aqueous alteration. Just a few such meteorites fall into such category: Paris and Yamato 791198 [5-7]. Recently, it was pointed out that Asuka (A) 12169 experienced very low degree of thermal metamorphism and aqueous alteration [8]. Here we present our preliminary results on the mineralogy of matrix of this meteorite. “<\/p>\n","protected":false},"excerpt":{"rendered":"
T. Noguchi, M. Yasutake, A. Tsuchiyama, A. Miyake, M. Kimura, A. Yamaguchi, N. Imae, K. Uesugi, A. Takeuchi 51st Lunar and Planetary Science Conference (2020), Abstract #1666 PDF (OPEN ACCESS) “Almost all CM chondrites experienced…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61,9,18,62],"tags":[1842,5421,3273,105,304,1843,1596],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21350"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21350"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21350\/revisions"}],"predecessor-version":[{"id":21352,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/21350\/revisions\/21352"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}