LINK<\/strong><\/a><\/p>\n\n\n\n“NWA 8785 is a remarkable, recently identified, unequilibrated enstatite chondrite. It was classified as an EL3 but contains highly unusual characteristics not observed in any other EL3, including a high abundance of FeO\u2010rich matrix and metal\u2010rich nodules that are texturally and mineralogically different from those in other EL3s. We characterized the mineral assemblages and compositions of metal\u2010rich nodules in a thin section of NWA 8785 and compared them to nodules in other EL3s to evaluate models for formation of metal\u2010rich nodules in EL3s. Of a total of 40 metal\u2010rich nodules, 10 were selected for detailed study. These metal\u2010rich nodules vary in their physical structure, texture, and mineral assemblages. Some contain the rare Al\u2010poor, alkali\u2010rich silicate mineral roedderite, a first discovery in an EL3, as well as the Cl\u2010bearing sulfide djerfisherite. The diversity of metal\u2010rich nodules in NWA 8785 suggests each nodule formed independently and supports their origin by primary processes prior to accretion. The high abundance of FeO\u2010rich matrix and the unique qualities of its metal\u2010rich nodules call into question classification of NWA 8785 as an EL3, but the Si content in its kamacite and Cr and Ti content in its troilite, and the presence of alabandite, support its classification as an EL3; thus, it is an EL3\u2010anomalous. Although alternative hypotheses exist, the presence of roedderite, as well as a magnetite\u2010rich matrix and sodalite, may provide the first evidence of extensive metasomatic alteration on the EL3 parent body.”<\/p>\n","protected":false},"excerpt":{"rendered":"
Margrit A. Rindlisbacher, Michael K. Weisberg, Denton S. Ebel, Samuel P. Alpert Meteoritics & Planetary ScienceVersion of Record online: 13 May 2021 LINK “NWA 8785 is a remarkable, recently identified, unequilibrated enstatite chondrite. It was…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,17],"tags":[1818,1813,5938],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27698"}],"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=27698"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27698\/revisions"}],"predecessor-version":[{"id":27699,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/27698\/revisions\/27699"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=27698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=27698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=27698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}