LINK<\/strong><\/a><\/p>\n\n\n\n“The Mahadevpur (27\u00b039\u203248\u2033 N, 95\u00b051\u203232\u2033\u2009E; Arunachal Pradesh, India) meteorite is a fall-type, coarse-grained rock consisting of a heterogeneous mixture of chondrules of varying types occurring in a matrix comprising mostly chondrule fragments. It was earlier classified as poorly shocked (S1, unshocked) ordinary chondrite (H4\/5). The minerals observed in the Mahadevpur meteorite include olivine, orthopyroxene, clinopyroxene, albitic-plagioclase, Fe-Ni alloy and troilite with minor amounts of chromite and phosphate. Olivine and orthopyroxene are almost equilibrated. The textures and compositional features of minerals and chondrule margins indicate a limited degree of recrystallization. The equilibration temperature (700\u2013800\u00b0C) for the Mahadevpur chondrite is consistent with the computed temperature (752\u2013902\u00b0C) derived from the coexisting orthopyroxene-clinopyroxene pairs. In the light of new evidences observed during the present study, such as olivine exhibiting undulose extinction and planar to sub-planar fractures, olivine and orthopyroxene showing strong mosaicism, the shock-melted plagioclase glasses, the presence of high-pressure mineral phases and silicate darkening, the earlier proposed shock stage pronouncement has been modified to S4\u2013S5 with supporting petrographic, sub-microscopic and Raman spectroscopic data. This is the first comprehensive account of the Mahadevpur chondrite with an upgraded shock stage classification.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Amulya Chandra Mazumdar, Jayanta Kumar Pati, Anuj Kumar Singh, Balen Bhagabaty, Sarat Phukan, Pritom Borah Geological JournalFirst published: 14 May 2023 LINK “The Mahadevpur (27\u00b039\u203248\u2033 N, 95\u00b051\u203232\u2033\u2009E; Arunachal Pradesh, India) meteorite is a fall-type, coarse-grained…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,7,47],"tags":[4852,3713,1807,1832],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33569"}],"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=33569"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33569\/revisions"}],"predecessor-version":[{"id":33570,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/33569\/revisions\/33570"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=33569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}