{"id":228,"date":"2018-02-15T20:26:40","date_gmt":"2018-02-15T20:26:40","guid":{"rendered":"http:\/\/e-probe.epss.ucla.edu\/?page_id=228"},"modified":"2021-06-12T17:41:06","modified_gmt":"2021-06-12T17:41:06","slug":"what-we-do","status":"publish","type":"page","link":"https:\/\/dev-probe.epss.ucla.edu\/?page_id=228","title":{"rendered":"Geology"},"content":{"rendered":"\n

Elemental Maps and Quantitative Analysis of Minerals<\/strong><\/h4>\n\n\n\n
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Elemental X-ray maps of a metamorphic garnet from Kongur Shan in China. Also included are a photomicrograph image in transmitted light (top-left) and a backscattered electron (BSE) image (center-left).  The maps resulted from 2000 x 2000 analyzed spots with a 1 \u00b5m interval.  Maps were created during four days of work.  Quantitative analyses of selected oxides are showed on the center-right image. Images are courtesy of Frank Kyte. <\/span><\/p>\n\n\n\n

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Asteroid Impact Ejecta <\/strong><\/h4>\n\n\n\n
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BSE images of impact spherules (scale bars = 10 ?m).  A) Well-preserved Ca-rich pyroxene in a glass matrix with traces of Cr-rich spinel.  B) Poorly preserved pyroxene that has been partially dissolved by seawater etching, leaving feathery voids.  Bright grains near rim are small spinels (<1 ?m).  C,D) Strongly altered and flattened spherules with material missing from their rims.  Composed mainly of Fe-rich oxides; silicates have been altered to clays.  C) Well-developed spinels with skeletal textures in clay matrix. D) Abundant spinel crystals.  Images are courtesy of Frank Kyte.
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Modified from Kyte, F.T., Shukolyukov, A., Hildebrand, A.R., Lugmair, G.W., and Hanova, J., 2014.  Chromium-isotopes in Late Eocene impact spherules indicate a likely asteroid belt provenance: Earth and Planetary Science Letters<\/em> 302, 279-286.<\/span><\/p>\n

https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0012821X10007582<\/a><\/p>\n\n\n

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CAI from Meteorite <\/strong><\/h4>\n\n\n\n
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C<\/strong>alcium-rich, A<\/strong>luminum-rich I<\/strong>nclusions (CAIs) are the first solids formed in our Solar System and preserve information about the earliest events in the solar nebula. Shown here is a small CAI that is composed of corundum (Al2<\/sub>O3<\/sub>) and hibonite (Ca(Al,Ti,Mg)12<\/sub>O19<\/sub>), which are high-temperature minerals that form out of solar composition gas >1600 \u00b0C. The X-ray elemental maps show the minerals more clearly and the Ti map shows that the hibonite has some Ti that distributed unevenly. This CAI was found in a pristine ordinary chondrite meteorite, NWA 8576, which was loaned from the UCLA meteorite collection by Alan Rubin.  Images are courtesy of Emilie Dunham.<\/span><\/p>\n

This project is funded by the 51 Pegasi b Fellowship:<\/span><\/p>\n

https:\/\/www.hsfoundation.org\/fellow\/emilie-dunham-ph-d-candidate\/<\/a><\/p>\n\n\n

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Elemental Maps and Quantitative Analysis of Minerals Elemental X-ray maps of a metamorphic garnet from Kongur Shan in China. Also included are a photomicrograph image in transmitted light (top-left) and a backscattered electron (BSE) image (center-left).  The maps resulted from 2000 x 2000 analyzed spots with a 1 \u00b5m interval.  Maps were created during four…<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-228","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/pages\/228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=228"}],"version-history":[{"count":54,"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/pages\/228\/revisions"}],"predecessor-version":[{"id":1346,"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=\/wp\/v2\/pages\/228\/revisions\/1346"}],"wp:attachment":[{"href":"https:\/\/dev-probe.epss.ucla.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}