Mineralogy, Textures and P–T Relationships of a Suite of Xenoliths from the Monaro Volcanic Province, New South Wales, Australia
Identifieur interne : 000859 ( Main/Exploration ); précédent : 000858; suivant : 000860Mineralogy, Textures and P–T Relationships of a Suite of Xenoliths from the Monaro Volcanic Province, New South Wales, Australia
Auteurs : Ian C. Roach [Australie]Source :
- Journal of Petrology [ 0022-3530 ] ; 2004-04.
English descriptors
- KwdEn :
Abstract
Intraplate basalts of the Eocene–Oligocene Monaro Volcanic Province (MVP), in southeastern New South Wales, include lower-crustal and refractory to weakly metasomatized upper-mantle xenoliths. Lower-crustal-derived xenoliths appear to be all two-pyroxene plagioclase granulites (CpxFe:Mg:Ca 0·17–0·56:0·63–0·77:0·28–0·89 OpxFe:Mg:Ca 0·39–0·52:1·37–1·47:0·02 An72–86 and An48–50) but may also include garnet pyroxenites at depth. Mantle-derived xenoliths are principally spinel-bearing lherzolites (Fo89·8–90·6 CpxFe:Mg:Ca 0·07–0·45:0·70–1·70:0·01–0·94 OpxFe:Mg:Ca 0·16–0·19:1·62–1·75:0·01–0·10) but also include amphibole ± spinel-bearing lherzolite (Fo88·7–89·1 CpxFe:Mg:Ca 0·09–0·21:0·61–0·91:0·73–0·93 OpxFe:Mg:Ca 0·09–0·31:0·70–1·54:0·03–0·91), spinel-bearing harzburgite (Fo90·5–90·7 CpxFe:Mg:Ca 0·08:0·91–0·93:0·74–0·84 OpxFe:Mg:Ca 0·16–0·18:1·73–1·79:0·00–0·02), wehrlite, pyroxenite (CpxFe:Mg:Ca 0·08–0·10:0·84–0·90:0·80–0·85 OpxFe:Mg:Ca 0·16–0·33:1·51–1·73:0·02–0·03) and rare garnet pyroxenite (GtFe:Mg:Ca 0·83–0·95:1·60–1·70:0·45–0·48 CpxFe:Mg:Ca 0·14–0·21:0·69–0·77:0·78–0·86 Opx Fe:Mg:Ca 0·31–0·42:1·43–1·56:0·02–0·03) and amphibole–apatite composites. Xenolith textures are generally weakly to moderately foliated, a few are mosaic-porphyroblastic and rare samples are veined or highly strained. MVP xenoliths appear to have equilibrated under similar pressure–temperature (P–T) conditions to other southeastern Australian xenoliths equivalent to the South Eastern Australia (SEA) palaeogeotherm. P–T estimates for the MVP suite of xenoliths reveal a heterogeneous lower crust and upper mantle that is thickly underplated to c. 1·8 GPa or c. 50 km depth. MVP xenolith P–T data are compared with those used to derive the SEA palaeogeotherm, which is shown to be in need of revision using more modern geothermometers and geobarometers and new xenolith coexisting mineral data.
Url:
DOI: 10.1093/petrology/egg108
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000941
- to stream Istex, to step Curation: 000590
- to stream Istex, to step Checkpoint: 000388
- to stream Main, to step Merge: 000880
- to stream Main, to step Curation: 000859
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Mineralogy, Textures and P–T Relationships of a Suite of Xenoliths from the Monaro Volcanic Province, New South Wales, Australia</title>
<author wicri:is="90%"><name sortKey="Roach, Ian C" sort="Roach, Ian C" uniqKey="Roach I" first="Ian C." last="Roach">Ian C. Roach</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:78C44061BA27027F6EA10AB73450542333CDAD29</idno>
<date when="2004" year="2004">2004</date>
<idno type="doi">10.1093/petrology/egg108</idno>
<idno type="url">https://api.istex.fr/document/78C44061BA27027F6EA10AB73450542333CDAD29/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">000941</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000941</idno>
<idno type="wicri:Area/Istex/Curation">000590</idno>
<idno type="wicri:Area/Istex/Checkpoint">000388</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000388</idno>
<idno type="wicri:doubleKey">0022-3530:2004:Roach I:mineralogy:textures:and</idno>
<idno type="wicri:Area/Main/Merge">000880</idno>
<idno type="wicri:Area/Main/Curation">000859</idno>
<idno type="wicri:Area/Main/Exploration">000859</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Mineralogy, Textures and P–T Relationships of a Suite of Xenoliths from the Monaro Volcanic Province, New South Wales, Australia</title>
<author wicri:is="90%"><name sortKey="Roach, Ian C" sort="Roach, Ian C" uniqKey="Roach I" first="Ian C." last="Roach">Ian C. Roach</name>
<affiliation wicri:level="1"><country xml:lang="fr" wicri:curation="lc">Australie</country>
<wicri:regionArea>CRC LEME, DEPARTMENT OF EARTH AND MARINE SCIENCES, AUSTRALIAN NATIONAL UNIVERSITY, A.C.T. 0200</wicri:regionArea>
<wicri:noRegion>A.C.T. 0200</wicri:noRegion>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Journal of Petrology</title>
<title level="j" type="abbrev">J. Petrology</title>
<idno type="ISSN">0022-3530</idno>
<idno type="eISSN">1460-2415</idno>
<imprint><publisher>Oxford University Press</publisher>
<date type="published" when="2004-04">2004-04</date>
<biblScope unit="volume">45</biblScope>
<biblScope unit="issue">4</biblScope>
<biblScope unit="page" from="739">739</biblScope>
<biblScope unit="page" to="758">758</biblScope>
</imprint>
<idno type="ISSN">0022-3530</idno>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0022-3530</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Monaro</term>
<term>eastern Australia</term>
<term>geotherm</term>
<term>petrography</term>
<term>texture</term>
<term>xenolith</term>
</keywords>
</textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Intraplate basalts of the Eocene–Oligocene Monaro Volcanic Province (MVP), in southeastern New South Wales, include lower-crustal and refractory to weakly metasomatized upper-mantle xenoliths. Lower-crustal-derived xenoliths appear to be all two-pyroxene plagioclase granulites (CpxFe:Mg:Ca 0·17–0·56:0·63–0·77:0·28–0·89 OpxFe:Mg:Ca 0·39–0·52:1·37–1·47:0·02 An72–86 and An48–50) but may also include garnet pyroxenites at depth. Mantle-derived xenoliths are principally spinel-bearing lherzolites (Fo89·8–90·6 CpxFe:Mg:Ca 0·07–0·45:0·70–1·70:0·01–0·94 OpxFe:Mg:Ca 0·16–0·19:1·62–1·75:0·01–0·10) but also include amphibole ± spinel-bearing lherzolite (Fo88·7–89·1 CpxFe:Mg:Ca 0·09–0·21:0·61–0·91:0·73–0·93 OpxFe:Mg:Ca 0·09–0·31:0·70–1·54:0·03–0·91), spinel-bearing harzburgite (Fo90·5–90·7 CpxFe:Mg:Ca 0·08:0·91–0·93:0·74–0·84 OpxFe:Mg:Ca 0·16–0·18:1·73–1·79:0·00–0·02), wehrlite, pyroxenite (CpxFe:Mg:Ca 0·08–0·10:0·84–0·90:0·80–0·85 OpxFe:Mg:Ca 0·16–0·33:1·51–1·73:0·02–0·03) and rare garnet pyroxenite (GtFe:Mg:Ca 0·83–0·95:1·60–1·70:0·45–0·48 CpxFe:Mg:Ca 0·14–0·21:0·69–0·77:0·78–0·86 Opx Fe:Mg:Ca 0·31–0·42:1·43–1·56:0·02–0·03) and amphibole–apatite composites. Xenolith textures are generally weakly to moderately foliated, a few are mosaic-porphyroblastic and rare samples are veined or highly strained. MVP xenoliths appear to have equilibrated under similar pressure–temperature (P–T) conditions to other southeastern Australian xenoliths equivalent to the South Eastern Australia (SEA) palaeogeotherm. P–T estimates for the MVP suite of xenoliths reveal a heterogeneous lower crust and upper mantle that is thickly underplated to c. 1·8 GPa or c. 50 km depth. MVP xenolith P–T data are compared with those used to derive the SEA palaeogeotherm, which is shown to be in need of revision using more modern geothermometers and geobarometers and new xenolith coexisting mineral data.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
</country>
</list>
<tree><country name="Australie"><noRegion><name sortKey="Roach, Ian C" sort="Roach, Ian C" uniqKey="Roach I" first="Ian C." last="Roach">Ian C. Roach</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NickelMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000859 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000859 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Terre |area= NickelMaghrebV1 |flux= Main |étape= Exploration |type= RBID |clé= ISTEX:78C44061BA27027F6EA10AB73450542333CDAD29 |texte= Mineralogy, Textures and P–T Relationships of a Suite of Xenoliths from the Monaro Volcanic Province, New South Wales, Australia }}
This area was generated with Dilib version V0.6.27. |