Some aspects of volcanic rocks of the valley of Mexico
Identifieur interne : 000F58 ( Istex/Corpus ); précédent : 000F57; suivant : 000F59Some aspects of volcanic rocks of the valley of Mexico
Auteurs : J. F. W. NegendankSource :
- Bulletin Volcanologique [ 0258-8900 ] ; 1973-09-01.
Abstract
Abstract: Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (Mooser 1963, 1969). An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism. This result was verified by calculating the average of all available and stratigraphically datable chemical analyses byGunn &Mooser (1971) andNegendank (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using theRittmann-norms in theStreckeisen-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification ofMiddlemost (1973): Quaternary : quartz-latite-andesite (andesite) Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite) Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite) The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors. The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model ofGunn &Mooser (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense ofRaleigh &Lee (1969).
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DOI: 10.1007/BF02597630
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Germany</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:D3B8E15EC95D2158798A021FBD412474E3BE0CCF</idno><date when="1973" year="1973">1973</date><idno type="doi">10.1007/BF02597630</idno><idno type="url">https://api.istex.fr/document/D3B8E15EC95D2158798A021FBD412474E3BE0CCF/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000F58</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000F58</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Some aspects of volcanic rocks of the valley of Mexico</title><author><name sortKey="Negendank, J F W" sort="Negendank, J F W" uniqKey="Negendank J" first="J. F. W." last="Negendank">J. F. W. Negendank</name><affiliation><mods:affiliation>Abt. Geowissenschaftliches Laboratorium der Physischen Geographie der Universität Trier-Kaiserslautern, 55 Trier, Schneidershof, W. Germany</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Bulletin Volcanologique</title><title level="j" type="abbrev">Bull Volcanol</title><idno type="ISSN">0258-8900</idno><idno type="eISSN">1432-0819</idno><imprint><publisher>Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="1973-09-01">1973-09-01</date><biblScope unit="volume">37</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="292">292</biblScope><biblScope unit="page" to="303">303</biblScope></imprint><idno type="ISSN">0258-8900</idno></series><idno type="istex">D3B8E15EC95D2158798A021FBD412474E3BE0CCF</idno><idno type="DOI">10.1007/BF02597630</idno><idno type="ArticleID">BF02597630</idno><idno type="ArticleID">Art2</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0258-8900</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (Mooser 1963, 1969). An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism. This result was verified by calculating the average of all available and stratigraphically datable chemical analyses byGunn &Mooser (1971) andNegendank (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using theRittmann-norms in theStreckeisen-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification ofMiddlemost (1973): Quaternary : quartz-latite-andesite (andesite) Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite) Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite) The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors. The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model ofGunn &Mooser (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense ofRaleigh &Lee (1969).</div></front></TEI><istex><corpusName>springer</corpusName><author><json:item><name>J. F. W. Negendank</name><affiliations><json:string>Abt. Geowissenschaftliches Laboratorium der Physischen Geographie der Universität Trier-Kaiserslautern, 55 Trier, Schneidershof, W. Germany</json:string></affiliations></json:item></author><articleId><json:string>BF02597630</json:string><json:string>Art2</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>OriginalPaper</json:string></originalGenre><abstract>Abstract: Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (Mooser 1963, 1969). An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism. This result was verified by calculating the average of all available and stratigraphically datable chemical analyses byGunn &Mooser (1971) andNegendank (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using theRittmann-norms in theStreckeisen-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification ofMiddlemost (1973): Quaternary : quartz-latite-andesite (andesite) Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite) Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite) The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors. The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model ofGunn &Mooser (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense ofRaleigh &Lee (1969).</abstract><qualityIndicators><score>5.556</score><pdfVersion>1.3</pdfVersion><pdfPageSize>447 x 656 pts</pdfPageSize><refBibsNative>false</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1747</abstractCharCount><pdfWordCount>2604</pdfWordCount><pdfCharCount>14431</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>246</abstractWordCount></qualityIndicators><title>Some aspects of volcanic rocks of the valley of Mexico</title><refBibs><json:item><author><json:item><name>Bi~yan </name></json:item><json:item><name>B </name></json:item></author><host><volume>78</volume><pages><last>1476</last><first>461</first></pages><author></author><title>Bull. Geol. Soc. Am</title><publicationDate>1967</publicationDate></host><title>Geology and Petrology ot Clarion Island, Me:rico</title><publicationDate>1967</publicationDate></json:item><json:item><author><json:item><name>B,M Gt~xr~</name></json:item><json:item><name>F Mo0se</name></json:item></author><host><volume>34</volume><pages><last>616</last><first>577</first></pages><issue>2</issue><author></author><title>Central Mexico. Bull. Vole</title><publicationDate>1971</publicationDate></host><publicationDate>1971</publicationDate></json:item><json:item><author><json:item><name>E,A K Mtoolemos 'r</name></json:item></author><host><volume>36</volume><pages><last>397</last><first>382</first></pages><issue>2</issue><author></author><title>Bull. Vole</title><publicationDate>1973</publicationDate></host><title>A Simple Classification of Volcanic Rocks</title><publicationDate>1973</publicationDate></json:item><json:item><author><json:item><name>F Mot~si-R</name></json:item></author><host><pages><last>22</last><first>15</first></pages><author></author><title>Mesas Redc ndas Sobre Proble~mts del Valle de Mexico Auditorio dcl Instituto Mexicano de Recursos Naturalcs Rcnbvables The Mexican Volcanic Belt-Structure and Development. Formatio~ of Fractures by Differential Crustal Heating. Pan American Symposium of the Upper Mantle. I1</title><publicationDate>1963</publicationDate></host><title>La Cttenea Lacustre deI Valle tie Mexica</title><publicationDate>1963</publicationDate></json:item><json:item><author><json:item><name>Nairn </name></json:item><json:item><name>A,E M </name></json:item><json:item><name>Ni-: Gf_ ' ~i}</name></json:item><json:item><name>/ Nk</name></json:item><json:item><name>J,F W </name></json:item></author><host><author></author><title>The Mexican Volcanic Belt. Strttctttre and Tectonics. Geofisica International</title><publicationDate>1973</publicationDate></host><title>Palaeomag~tetic Im,estigations of the Tertiary and Ouaterrtary lgneoos Rocks: VIII-A Palaeomagnetic and Petrologic Study of Volcanics of the Valley of Mexico</title><publicationDate>1973</publicationDate></json:item><json:item><author><json:item><name>N Er-~0ar~k</name></json:item><json:item><name>J,F W </name></json:item></author><host><volume>11632</volume><pages><last>320</last><first>308</first></pages><issue>117 2 31</issue><author></author><title>N. Jb. Miner. Abh. N. Jb. Miner. Ab,h</title><publicationDate>1972</publicationDate></host><title>Volcanics of the Valley of Mexico. Part. I: Petrography of the Volca~Hcs Volcanics o/ the Valley of Mexico. Part 1I: The Opaque Mineralogy</title><publicationDate>1972</publicationDate></json:item><json:item><author><json:item><name>Er </name></json:item><json:item><name>H </name></json:item><json:item><name>Zeii </name></json:item><json:item><name>W </name></json:item></author><host><pages><last>903</last><first>866</first></pages><author></author><title>Proc. of the Andesite Conference)</title><publicationDate>1969</publicationDate></host><title>Die quartiire , Andesit , -Formation in der Hochkordiltere Nord-Chiles</title><publicationDate>1969</publicationDate></json:item><json:item><author><json:item><name> Ralei</name></json:item><json:item><name>C,B It</name></json:item><json:item><name>Lee </name></json:item><json:item><name>W,H K </name></json:item></author><host><pages><last>110</last><first>99</first></pages><author></author><title>Sea-floor Spreading and Island-Arc Tectonics</title><publicationDate>1969</publicationDate></host><publicationDate>1969</publicationDate></json:item><json:item><author><json:item><name>Rn Tman~</name></json:item><json:item><name>A </name></json:item></author><host><volume>57</volume><pages><last>295</last><first>277</first></pages><issue>2</issue><author></author><title>Geol. Rdsch. Bull. Volc</title><publicationDate>1967</publicationDate></host><title>Die Bimodalitiit des Vulkanis'mus ttnd die Herktm[t tier Magmen The Probable Origin o/ High-Alumilm-Basalts</title><publicationDate>1967</publicationDate></json:item><json:item><author><json:item><name>S 'ir1~c ' Kmsen</name></json:item><json:item><name>A </name></json:item></author><host><volume>107</volume><pages><last>240</last><first>144</first></pages><author></author><title>N. Jb. Miner. 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Geowissenschaftliches Laboratorium der Physischen Geographie der Universität Trier-Kaiserslautern, 55 Trier, Schneidershof, W. Germany</affiliation></author></analytic><monogr><title level="j">Bulletin Volcanologique</title><title level="j" type="abbrev">Bull Volcanol</title><idno type="journal-ID">445</idno><idno type="pISSN">0258-8900</idno><idno type="eISSN">1432-0819</idno><idno type="issue-article-count">15</idno><idno type="volume-issue-count">4</idno><imprint><publisher>Springer-Verlag</publisher><pubPlace>Berlin/Heidelberg</pubPlace><date type="published" when="1973-09-01"></date><biblScope unit="volume">37</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="292">292</biblScope><biblScope unit="page" to="303">303</biblScope></imprint></monogr><idno type="istex">D3B8E15EC95D2158798A021FBD412474E3BE0CCF</idno><idno type="DOI">10.1007/BF02597630</idno><idno type="ArticleID">BF02597630</idno><idno type="ArticleID">Art2</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1973-09-15</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Abstract: Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (Mooser 1963, 1969). An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism. This result was verified by calculating the average of all available and stratigraphically datable chemical analyses byGunn &Mooser (1971) andNegendank (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using theRittmann-norms in theStreckeisen-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification ofMiddlemost (1973): Quaternary : quartz-latite-andesite (andesite) Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite) Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite) The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors. The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model ofGunn &Mooser (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense ofRaleigh &Lee (1969).</p></abstract><textClass><keywords scheme="Journal-Subject-Group"><list><label>G</label><label>G17002</label><label>G18009</label><label>G24009</label><label>G27008</label><item><term>Earth Sciences</term></item><item><term>Geology</term></item><item><term>Geophysics/Geodesy</term></item><item><term>Mineralogy</term></item><item><term>Sedimentology</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1973-09-15">Created</change><change when="1973-09-01">Published</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2016-11-22">References added</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2017-01-20">References added</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/D3B8E15EC95D2158798A021FBD412474E3BE0CCF/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Springer, Publisher found" wicri:toSee="no header"><istex:xmlDeclaration>version="1.0" encoding="UTF-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//Springer-Verlag//DTD A++ V2.4//EN" URI="http://devel.springer.de/A++/V2.4/DTD/A++V2.4.dtd" name="istex:docType"></istex:docType><istex:document><Publisher><PublisherInfo><PublisherName>Springer-Verlag</PublisherName><PublisherLocation>Berlin/Heidelberg</PublisherLocation></PublisherInfo><Journal><JournalInfo JournalProductType="ArchiveJournal" NumberingStyle="Unnumbered"><JournalID>445</JournalID><JournalPrintISSN>0258-8900</JournalPrintISSN><JournalElectronicISSN>1432-0819</JournalElectronicISSN><JournalTitle>Bulletin Volcanologique</JournalTitle><JournalAbbreviatedTitle>Bull Volcanol</JournalAbbreviatedTitle><JournalSubjectGroup><JournalSubject Code="G" Type="Primary">Earth Sciences</JournalSubject><JournalSubject Code="G17002" Priority="1" Type="Secondary">Geology</JournalSubject><JournalSubject Code="G18009" Priority="2" Type="Secondary">Geophysics/Geodesy</JournalSubject><JournalSubject Code="G24009" Priority="3" Type="Secondary">Mineralogy</JournalSubject><JournalSubject Code="G27008" Priority="4" Type="Secondary">Sedimentology</JournalSubject></JournalSubjectGroup></JournalInfo><Volume><VolumeInfo TocLevels="0" VolumeType="Regular"><VolumeIDStart>37</VolumeIDStart><VolumeIDEnd>37</VolumeIDEnd><VolumeIssueCount>4</VolumeIssueCount></VolumeInfo><Issue IssueType="Regular"><IssueInfo TocLevels="0"><IssueIDStart>3</IssueIDStart><IssueIDEnd>3</IssueIDEnd><IssueArticleCount>15</IssueArticleCount><IssueHistory><CoverDate><DateString>1973</DateString><Year>1973</Year><Month>9</Month></CoverDate></IssueHistory><IssueCopyright><CopyrightHolderName>Stabilimento Tipografico Francesco Gianni & Figli</CopyrightHolderName><CopyrightYear>1973</CopyrightYear></IssueCopyright></IssueInfo><Article ID="Art2"><ArticleInfo ArticleType="OriginalPaper" ContainsESM="No" Language="En" NumberingStyle="Unnumbered" TocLevels="0"><ArticleID>BF02597630</ArticleID><ArticleDOI>10.1007/BF02597630</ArticleDOI><ArticleSequenceNumber>2</ArticleSequenceNumber><ArticleTitle Language="En">Some aspects of volcanic rocks of the valley of Mexico</ArticleTitle><ArticleFirstPage>292</ArticleFirstPage><ArticleLastPage>303</ArticleLastPage><ArticleHistory><RegistrationDate><Year>2007</Year><Month>3</Month><Day>30</Day></RegistrationDate><Received><Year>1973</Year><Month>9</Month><Day>15</Day></Received></ArticleHistory><ArticleCopyright><CopyrightHolderName>Stabilimento Tipografico Francesco Gianni & Figli</CopyrightHolderName><CopyrightYear>1973</CopyrightYear></ArticleCopyright><ArticleGrants Type="Regular"><MetadataGrant Grant="OpenAccess"></MetadataGrant><AbstractGrant Grant="OpenAccess"></AbstractGrant><BodyPDFGrant Grant="Restricted"></BodyPDFGrant><BodyHTMLGrant Grant="Restricted"></BodyHTMLGrant><BibliographyGrant Grant="Restricted"></BibliographyGrant><ESMGrant Grant="Restricted"></ESMGrant></ArticleGrants><ArticleContext><JournalID>445</JournalID><VolumeIDStart>37</VolumeIDStart><VolumeIDEnd>37</VolumeIDEnd><IssueIDStart>3</IssueIDStart><IssueIDEnd>3</IssueIDEnd></ArticleContext></ArticleInfo><ArticleHeader><AuthorGroup><Author AffiliationIDS="Aff1"><AuthorName DisplayOrder="Western"><GivenName>J.</GivenName><GivenName>F.</GivenName><GivenName>W.</GivenName><FamilyName>Negendank</FamilyName></AuthorName></Author><Affiliation ID="Aff1"><OrgName>Abt. Geowissenschaftliches Laboratorium der Physischen Geographie der Universität Trier-Kaiserslautern</OrgName><OrgAddress><Street>55 Trier</Street><City>Schneidershof</City><Country>W. Germany</Country></OrgAddress></Affiliation></AuthorGroup><Abstract ID="Abs1" Language="En"><Heading>Abstract</Heading><Para>Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (<Emphasis Type="SmallCaps">Mooser</Emphasis> 1963, 1969).</Para><Para>An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism.</Para><Para>This result was verified by calculating the average of all available and stratigraphically datable chemical analyses by<Emphasis Type="SmallCaps">Gunn</Emphasis> &<Emphasis Type="SmallCaps">Mooser</Emphasis> (1971) and<Emphasis Type="SmallCaps">Negendank</Emphasis> (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using the<Emphasis Type="SmallCaps">Rittmann</Emphasis>-norms in the<Emphasis Type="SmallCaps">Streckeisen</Emphasis>-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification of<Emphasis Type="SmallCaps">Middlemost</Emphasis> (1973):</Para><Para>Quaternary : quartz-latite-andesite (andesite)</Para><Para>Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite)</Para><Para>Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite)</Para><Para>The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors.</Para><Para>The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model of<Emphasis Type="SmallCaps">Gunn</Emphasis> &<Emphasis Type="SmallCaps">Mooser</Emphasis> (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense of<Emphasis Type="SmallCaps">Raleigh</Emphasis> &<Emphasis Type="SmallCaps">Lee</Emphasis> (1969).</Para></Abstract><ArticleNote Type="PresentedAt"><SimplePara>Presented at the Geodynamics Section.</SimplePara></ArticleNote></ArticleHeader><NoBody></NoBody></Article></Issue></Volume></Journal></Publisher></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Some aspects of volcanic rocks of the valley of Mexico</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Some aspects of volcanic rocks of the valley of Mexico</title></titleInfo><name type="personal"><namePart type="given">J.</namePart><namePart type="given">F.</namePart><namePart type="given">W.</namePart><namePart type="family">Negendank</namePart><affiliation>Abt. Geowissenschaftliches Laboratorium der Physischen Geographie der Universität Trier-Kaiserslautern, 55 Trier, Schneidershof, W. Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="OriginalPaper"></genre><originInfo><publisher>Springer-Verlag</publisher><place><placeTerm type="text">Berlin/Heidelberg</placeTerm></place><dateCreated encoding="w3cdtf">1973-09-15</dateCreated><dateIssued encoding="w3cdtf">1973-09-01</dateIssued><copyrightDate encoding="w3cdtf">1973</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Abstract: Three periods of volcanic activity connected with tectonic events form the geological history of the Valley of Mexico (Mooser 1963, 1969). An igneous rock suite from rhyodacites to andesites (but lacking rhyolites and basalts) can be observed in each period. During the Tertiary epochs — in the Oligo-Miocene and Upper Miocene-Pliocene — we have a more dacitic volcanism, in the Quaternary epoch a more andesitic volcanism. This result was verified by calculating the average of all available and stratigraphically datable chemical analyses byGunn &Mooser (1971) andNegendank (1972). Using the average chemical composition of the Oligo-Miocene, Upper Miocene-Pliocene and Quaternary products the equivalent igneous rocks were computed using theRittmann-norms in theStreckeisen-Q-A-P-F double triangle with the following result (names in parenthesis are those using the classification ofMiddlemost (1973): Quaternary : quartz-latite-andesite (andesite) Upper Miocene-Pliocene : leuco-quartz-latite-andesite (high lime dacite) Oligo-Miocene : leuco-quartz-latite-andesite (high lime dacite) The equal average composition of the two groups of Tertiary volcanic rocks seems to support the theory of a uniform primary andesite magma apart from which of the two possible theories of petrogenesis one favors. The calculated average trace element abundances show high Cr- and Ni-values which suggests that mantle material was involved if we consider the Tertiary products as partial melting products of the lower crust. A more elegant hypothesis seems to be the model ofGunn &Mooser (1971), who consider these volcanic rocks as partial melting products of oceanic tholeiites or their high pressure derivatives in the sense ofRaleigh &Lee (1969).</abstract><relatedItem type="host"><titleInfo><title>Bulletin Volcanologique</title></titleInfo><titleInfo type="abbreviated"><title>Bull Volcanol</title></titleInfo><genre type="journal" displayLabel="Archive Journal"></genre><originInfo><dateIssued encoding="w3cdtf">1973-09-01</dateIssued><copyrightDate encoding="w3cdtf">1973</copyrightDate></originInfo><subject><genre>Journal-Subject-Group</genre><topic authority="SpringerSubjectCodes" authorityURI="G">Earth Sciences</topic><topic authority="SpringerSubjectCodes" authorityURI="G17002">Geology</topic><topic authority="SpringerSubjectCodes" authorityURI="G18009">Geophysics/Geodesy</topic><topic authority="SpringerSubjectCodes" authorityURI="G24009">Mineralogy</topic><topic authority="SpringerSubjectCodes" authorityURI="G27008">Sedimentology</topic></subject><identifier type="ISSN">0258-8900</identifier><identifier type="eISSN">1432-0819</identifier><identifier type="JournalID">445</identifier><identifier type="IssueArticleCount">15</identifier><identifier type="VolumeIssueCount">4</identifier><part><date>1973</date><detail type="volume"><number>37</number><caption>vol.</caption></detail><detail type="issue"><number>3</number><caption>no.</caption></detail><extent unit="pages"><start>292</start><end>303</end></extent></part><recordInfo><recordOrigin>Stabilimento Tipografico Francesco Gianni & Figli, 1973</recordOrigin></recordInfo></relatedItem><identifier type="istex">D3B8E15EC95D2158798A021FBD412474E3BE0CCF</identifier><identifier type="DOI">10.1007/BF02597630</identifier><identifier type="ArticleID">BF02597630</identifier><identifier type="ArticleID">Art2</identifier><accessCondition type="use and reproduction" contentType="copyright">Stabilimento Tipografico Francesco Gianni & Figli, 1973</accessCondition><recordInfo><recordContentSource>SPRINGER</recordContentSource><recordOrigin>Stabilimento Tipografico Francesco Gianni & Figli, 1973</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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