{"id":8660,"date":"2016-01-30T23:44:05","date_gmt":"2016-01-30T21:44:05","guid":{"rendered":"http:\/\/karmaka.de\/?p=8660"},"modified":"2016-05-06T15:47:44","modified_gmt":"2016-05-06T13:47:44","slug":"transmission-electron-microscopic-study-of-the-fine-grained-vein-matrix-in-the-suizhou-l6-meteorite","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=8660","title":{"rendered":"Transmission electron microscopic study of the fine-grained vein matrix in the Suizhou L6 meteorite"},"content":{"rendered":"<p>Xie Xiande , Wang Jianbo, Gu Xiangping, Xiong Yi, Jia Shuangfeng<\/p>\n<p>Acta Geochimica<br \/>\nJune 2016, Volume 35, Issue 2, pp 105-110<\/p>\n<p><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s11631-016-0093-7\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;The mineralogy of shock vein matrix in the Suizhou meteorite has been investigated by optical and transmission electron microscopy. It was revealed that the vein matrix is composed of majorite-pyrope garnet, magnesiow\u00fcstite, and ringwoodite, with FeNi\u2013FeS intergrowths. The observation and character of ring-like selected electron diffraction (SAED) patterns indicate that the idiomorphic garnet crystals in the vein matrix have different orientations. The polycrystalline nature of magnesiow\u00fcstite is also confirmed by a ring-like SAED pattern. Both garnet and magnesiow\u00fcstite crystals showed sharp diffraction spots, signifying the good crystallinity of these two minerals. The SAED pattern of cryptocrystalline ringwoodite shows only diffuse concentric diffraction rings. FeNi metal and troilite (FeS), which were molten during the shock event, occur in the matrix as fine eutectic FeNi\u2013FeS intergrowths filling the interstices between garnet and magnesiow\u00fcstite grains. Based on the phase diagram of the Allende chondrite and the results of this TEM study, it is inferred that majorite-pyrope garnet first crystallized from the Suizhou chondritic melt at 22\u201326 GPa, followed by crystallization of magnesiow\u00fcstite at 20\u201324 GPa, and then ringwoodite at 18\u201320 GPa. The eutectic intergrowths of FeNi-metal and troilite are proposed to have crystallized during meteorite cooling and solidified at the last stage of vein formation.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Xie Xiande , Wang Jianbo, Gu Xiangping, Xiong Yi, Jia Shuangfeng Acta Geochimica June 2016, Volume 35, Issue 2, pp 105-110 LINK &#8220;The mineralogy of shock vein matrix in the Suizhou meteorite has been investigated&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7],"tags":[2805,103,2804,1274],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8660"}],"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=8660"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8660\/revisions"}],"predecessor-version":[{"id":8661,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8660\/revisions\/8661"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}