Secondary alteration in eclogites from kimberlite pipes
An analcime-type zeolite has been found in eclogite xenoliths from a kimberlite pipe. Analytical data obtained for the primary pyroxene (omphacite) and secondary minerals (mica, analcime, clay) indicate that the xenoliths have been contaminated by K,Rb and Cs, which are important for the study of th...
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Veröffentlicht in: | The American mineralogist 1968-08, Vol.53 (7-8), p.1336-1346 |
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description | An analcime-type zeolite has been found in eclogite xenoliths from a kimberlite pipe. Analytical data obtained for the primary pyroxene (omphacite) and secondary minerals (mica, analcime, clay) indicate that the xenoliths have been contaminated by K,Rb and Cs, which are important for the study of the origin of eclogites. Metasomatic alteration of an eclogite during the intrusion of the kimberlite may be followed by further contamination of the eclogite by the migration of elements during the weathering of the kimberlite. For many elements abundance data must be determined on separated primary eclogite minerals and data obtained on whole-rocks should be treated with some circumspection. |
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W</creator><creatorcontrib>Berg, G. W</creatorcontrib><description>An analcime-type zeolite has been found in eclogite xenoliths from a kimberlite pipe. Analytical data obtained for the primary pyroxene (omphacite) and secondary minerals (mica, analcime, clay) indicate that the xenoliths have been contaminated by K,Rb and Cs, which are important for the study of the origin of eclogites. Metasomatic alteration of an eclogite during the intrusion of the kimberlite may be followed by further contamination of the eclogite by the migration of elements during the weathering of the kimberlite. For many elements abundance data must be determined on separated primary eclogite minerals and data obtained on whole-rocks should be treated with some circumspection.</description><identifier>ISSN: 0003-004X</identifier><identifier>EISSN: 1945-3027</identifier><language>eng</language><publisher>Mineralogical Society of America</publisher><subject>Africa ; alteration ; Alteration products of eclogites ; eclogite ; framework silicates ; igneous rocks ; kimberlite ; kimberlite pipes ; major-element analyses ; metamorphic rocks ; mineral data ; mineralogy ; Roberts Victor mine ; secondary ; silicates ; South Africa ; Southern Africa ; ultramafic composition ; weathering ; zeolite ; zeolite alteration ; zeolite group ; zeolites</subject><ispartof>The American mineralogist, 1968-08, Vol.53 (7-8), p.1336-1346</ispartof><rights>GeoRef, Copyright 2020, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey @Reston, VA @USA @United States</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780</link.rule.ids></links><search><creatorcontrib>Berg, G. W</creatorcontrib><title>Secondary alteration in eclogites from kimberlite pipes</title><title>The American mineralogist</title><description>An analcime-type zeolite has been found in eclogite xenoliths from a kimberlite pipe. Analytical data obtained for the primary pyroxene (omphacite) and secondary minerals (mica, analcime, clay) indicate that the xenoliths have been contaminated by K,Rb and Cs, which are important for the study of the origin of eclogites. Metasomatic alteration of an eclogite during the intrusion of the kimberlite may be followed by further contamination of the eclogite by the migration of elements during the weathering of the kimberlite. For many elements abundance data must be determined on separated primary eclogite minerals and data obtained on whole-rocks should be treated with some circumspection.</description><subject>Africa</subject><subject>alteration</subject><subject>Alteration products of eclogites</subject><subject>eclogite</subject><subject>framework silicates</subject><subject>igneous rocks</subject><subject>kimberlite</subject><subject>kimberlite pipes</subject><subject>major-element analyses</subject><subject>metamorphic rocks</subject><subject>mineral data</subject><subject>mineralogy</subject><subject>Roberts Victor mine</subject><subject>secondary</subject><subject>silicates</subject><subject>South Africa</subject><subject>Southern Africa</subject><subject>ultramafic composition</subject><subject>weathering</subject><subject>zeolite</subject><subject>zeolite alteration</subject><subject>zeolite group</subject><subject>zeolites</subject><issn>0003-004X</issn><issn>1945-3027</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1968</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNotj0tLxDAUhYMoWEf_Q_YSuHncplnK4AsGXKjgrqTN7ZCxkwxJRfz3FnR14HD4Ps4Za6QzKDQoe84aANACwHxcsqtaDwBKaXQNs6805hR8-eF-Xqj4JebEY-I0znkfF6p8KvnIP-NxoDKvBT_FE9VrdjH5udLNf27Y-8P92_ZJ7F4en7d3O-GlMYtYHVa1GkzrlEILU2fNNAVyMshAUiGqoAIaQEAkonWBrpVDcNT5QWm9Ybd_3D3lOkZKI33nMof-kL9KWs29dG3XAzqzPvwFMy5FkA</recordid><startdate>196808</startdate><enddate>196808</enddate><creator>Berg, G. W</creator><general>Mineralogical Society of America</general><scope/></search><sort><creationdate>196808</creationdate><title>Secondary alteration in eclogites from kimberlite pipes</title><author>Berg, G. W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a144t-3597263046922570f874ffde91d1de12552d2d5405055eee70f5961bd9e8ab233</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1968</creationdate><topic>Africa</topic><topic>alteration</topic><topic>Alteration products of eclogites</topic><topic>eclogite</topic><topic>framework silicates</topic><topic>igneous rocks</topic><topic>kimberlite</topic><topic>kimberlite pipes</topic><topic>major-element analyses</topic><topic>metamorphic rocks</topic><topic>mineral data</topic><topic>mineralogy</topic><topic>Roberts Victor mine</topic><topic>secondary</topic><topic>silicates</topic><topic>South Africa</topic><topic>Southern Africa</topic><topic>ultramafic composition</topic><topic>weathering</topic><topic>zeolite</topic><topic>zeolite alteration</topic><topic>zeolite group</topic><topic>zeolites</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Berg, G. W</creatorcontrib><jtitle>The American mineralogist</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Berg, G. W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Secondary alteration in eclogites from kimberlite pipes</atitle><jtitle>The American mineralogist</jtitle><date>1968-08</date><risdate>1968</risdate><volume>53</volume><issue>7-8</issue><spage>1336</spage><epage>1346</epage><pages>1336-1346</pages><issn>0003-004X</issn><eissn>1945-3027</eissn><abstract>An analcime-type zeolite has been found in eclogite xenoliths from a kimberlite pipe. Analytical data obtained for the primary pyroxene (omphacite) and secondary minerals (mica, analcime, clay) indicate that the xenoliths have been contaminated by K,Rb and Cs, which are important for the study of the origin of eclogites. Metasomatic alteration of an eclogite during the intrusion of the kimberlite may be followed by further contamination of the eclogite by the migration of elements during the weathering of the kimberlite. For many elements abundance data must be determined on separated primary eclogite minerals and data obtained on whole-rocks should be treated with some circumspection.</abstract><pub>Mineralogical Society of America</pub><tpages>11</tpages></addata></record> |
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subjects | Africa alteration Alteration products of eclogites eclogite framework silicates igneous rocks kimberlite kimberlite pipes major-element analyses metamorphic rocks mineral data mineralogy Roberts Victor mine secondary silicates South Africa Southern Africa ultramafic composition weathering zeolite zeolite alteration zeolite group zeolites |
title | Secondary alteration in eclogites from kimberlite pipes |
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