The origin of some New Zealand metamorphic rocks as shown by their major and trace element composition
Identifieur interne : 000948 ( Istex/Corpus ); précédent : 000947; suivant : 000949The origin of some New Zealand metamorphic rocks as shown by their major and trace element composition
Auteurs : S. R. TaylorSource :
- Geochimica et Cosmochimica Acta [ 0016-7037 ] ; 1955.
Abstract
In a study of a portion of the regionally metamorphosed Alpine Schist Belt, South Island, New Zealand, where thin beds of green schists are interbedded with quartz-albite-biotite schists, the redistribution of the chemical elements by metamorphism is shown to have been slight, so that chemical data can be used to indicate the nature of the parent rock.Ten analyses are reported for the quartz-albite-biotite-(calcite)-(clinozoisite) schists (Arahura series). The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. It is also concluded that the intrusion took place prior to deformation as well as metamorphism.
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DOI: 10.1016/0016-7037(55)90052-1
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Taylor</name><affiliation><mods:affiliation>Department of Geology, Indiana University USA</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Geochimica et Cosmochimica Acta</title><title level="j" type="abbrev">GCA</title><idno type="ISSN">0016-7037</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1955">1955</date><biblScope unit="volume">8</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="182">182</biblScope><biblScope unit="page" to="197">197</biblScope></imprint><idno type="ISSN">0016-7037</idno></series><idno type="istex">F9D16EA463A29D67238D6B021FB85D83CE97BC83</idno><idno type="DOI">10.1016/0016-7037(55)90052-1</idno><idno type="PII">0016-7037(55)90052-1</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0016-7037</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In a study of a portion of the regionally metamorphosed Alpine Schist Belt, South Island, New Zealand, where thin beds of green schists are interbedded with quartz-albite-biotite schists, the redistribution of the chemical elements by metamorphism is shown to have been slight, so that chemical data can be used to indicate the nature of the parent rock.Ten analyses are reported for the quartz-albite-biotite-(calcite)-(clinozoisite) schists (Arahura series). The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. It is also concluded that the intrusion took place prior to deformation as well as metamorphism.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>S.R. 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The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. 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The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. 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The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.</ce:simple-para><ce:simple-para>Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. It is also concluded that the intrusion took place prior to deformation as well as metamorphism.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>The origin of some New Zealand metamorphic rocks as shown by their major and trace element composition</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>The origin of some New Zealand metamorphic rocks as shown by their major and trace element composition</title></titleInfo><name type="personal"><namePart type="given">S.R.</namePart><namePart type="family">Taylor</namePart><affiliation>Department of Geology, Indiana University USA</affiliation><description>Now at Department of Geology and Mineralogy, Oxford.</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1955</dateIssued><copyrightDate encoding="w3cdtf">1955</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">In a study of a portion of the regionally metamorphosed Alpine Schist Belt, South Island, New Zealand, where thin beds of green schists are interbedded with quartz-albite-biotite schists, the redistribution of the chemical elements by metamorphism is shown to have been slight, so that chemical data can be used to indicate the nature of the parent rock.Ten analyses are reported for the quartz-albite-biotite-(calcite)-(clinozoisite) schists (Arahura series). The distribution of the elements, in particular, F, V, Mn, Na, Ca, Sr, K, and Ba, indicates that the parent rocks were of greywacke type composed of essentially unweathered minerals, while the source rocks were high in alkali feldspar.Seven analyses are given for the green schists (Pounamu Series). They show significantly higher amounts of Cr, Mg, Ni, Co, and Cu and lower amounts of P, Ti, Sr, Ba, and K compared with the enclosing Arahura schists. One group of three ten-foot beds is interpreted as being derived from sills of basaltic composition. A thicker unit is of more basic (olivine or picrite basalt) composition, and the distribution of Cr, Fe, Mg, Ti, Ni, Co, Cu, V, Sc, Na, and Ca indicates gravitational differentiation in the original sill. It is also concluded that the intrusion took place prior to deformation as well as metamorphism.</abstract><relatedItem type="host"><titleInfo><title>Geochimica et Cosmochimica Acta</title></titleInfo><titleInfo type="abbreviated"><title>GCA</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">195510</dateIssued></originInfo><identifier type="ISSN">0016-7037</identifier><identifier type="PII">S0016-7037(00)X0498-X</identifier><part><date>195510</date><detail type="volume"><number>8</number><caption>vol.</caption></detail><detail type="issue"><number>4</number><caption>no.</caption></detail><extent unit="issue pages"><start>173</start><end>224</end></extent><extent unit="pages"><start>182</start><end>197</end></extent></part></relatedItem><identifier type="istex">F9D16EA463A29D67238D6B021FB85D83CE97BC83</identifier><identifier type="DOI">10.1016/0016-7037(55)90052-1</identifier><identifier type="PII">0016-7037(55)90052-1</identifier><recordInfo><recordContentSource>ELSEVIER</recordContentSource></recordInfo></mods></metadata></istex></record>Pour manipuler ce document sous Unix (Dilib)
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