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<article article-type="research-article">
<front>
<journal-meta>
<journal-id journal-id-type="archive">gsminmag</journal-id>
<journal-title>Mineralogical Magazine</journal-title>
<abbrev-journal-title abbrev-type="full">Mineralogical Magazine</abbrev-journal-title>
<issn pub-type="ppub">0026-461X</issn>
<publisher>
<publisher-name>Mineralogical Society</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.1180/minmag.1994.058.392.03</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Petrology</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Occurrence of Zoned Uvarovite&#x2014;Grossular Garnet in a Rodingite from the Vumba Schist Belt, Botswana, Africa: Implications for the Origin of Rodingites</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Mogessie</surname>
<given-names>A.</given-names>
</name>
<aff>Institute of Mineralogy - Crystallography and Petrology Karl - Franzens University Graz, Universitatsplatz 2, A-8010 Graz, Austria</aff></contrib>
<contrib contrib-type="author">
<name>
<surname>Rammlmair</surname>
<given-names>D.</given-names>
</name>
<aff>Federal Institute for Geosciences and Natural Resources, Stilleweg 2, D-30655 Hannover, Germany</aff></contrib></contrib-group>
<pub-date pub-type="ppub">
<month>9</month>
<year>1994</year>
</pub-date>
<volume>58</volume>
<issue>392</issue>
<fpage>375</fpage>
<lpage>386</lpage>
<history>
<date date-type="received">
<day>17</day>
<month>8</month>
<year>1993</year>
</date>
<date date-type="rev-recd">
<day>25</day>
<month>10</month>
<year>1993</year>
</date></history>
<copyright-statement>Copyright &#x00A9; 1994, The Mineralogical Society</copyright-statement>
<copyright-year>1994</copyright-year>
<abstract>
<title>Abstract</title>
<p>Based on petrographic, mineralogical and geochemical data, two groups of rodingites have been documented from the polymetamorphic Vumba Schist Belt of Botswana. Group I rodingites contain relict chromite grains with zoned uvarovite-grossular + clinopyroxene + epidote/zoisite &#x00B1; quartz, whereas group II rodingites contain no chromite and uvarovite. Although the presence of chromite with Cr/(Cr + Al + Fe<sup>3+</sup>) ratio &#x003E; 90, similar to chromites found in komatiites, suggests a possible komatiitic origin of group I rodingites, the major and trace element chemical data of most analysed basic rocks from this belt indicate that the protoliths of both groups of rodingites are related to basalt/gabbro of komatiitic affinity. The rodingites formed during the M3 phase of metamorphism.</p></abstract>
<kwd-group>
<title>Keywords</title>
<kwd>rodingite</kwd>
<kwd>chromite</kwd>
<kwd>uvarovite</kwd>
<kwd>grossular</kwd>
<kwd>Vumba</kwd>
<kwd>Botswana</kwd>
</kwd-group>
</article-meta>
</front>
</article>
