dc.creator |
Shellnutt, J. G. |
|
dc.creator |
Dostal, J. |
|
dc.creator |
Iizuka, Y. |
|
dc.date.accessioned |
2018-02-28T13:53:09Z |
|
dc.date.available |
2018-02-28T13:53:09Z |
|
dc.date.issued |
2013-11-22 |
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dc.identifier.issn |
1525-2027 |
|
dc.identifier.uri |
http://library2.smu.ca/handle/01/27290 |
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dc.description |
Publisher's Version/PDF |
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dc.description.abstract |
The role silicate-liquid immiscibility plays in the formation of macro-scale, bimodal volcanic/plutonic igneous complexes, and Fe-Ti oxide deposits is debated as the rock compositions produced by immiscibility are similar to those produced by other petrological processes. Within the flows of the North Mountain basalt of the Central Atlantic Magmatic Province are centimeter-thick granophyre layers. The granophyre layers are a mixture of mafic (i.e., ilmenite, magnetite, ferroaugite, plagioclase, stilpnomelane, ferrorichterite) and felsic (i.e., sanidine, quartz) minerals and highly siliceous (>75 wt% SiO[subscript 2]) mesostases. Petrological modeling indicates that the siliceous mesostasis + sanidine + quartz [plus or minus] ferrorichterite represents a Si-rich silicate immiscible melt whereas the ferroaugite + plagioclase + stilpnomelane represent the Fe-rich silicate immiscible liquid. The identification of naturally occurring silicate-liquid immiscibility at scales greater than micron level is an important observation which may be useful in identifying volcanic and plutonic rocks which formed by macro-scale silicate-liquid immiscibility. |
en_CA |
dc.description.abstract |
<p>The role silicate-liquid immiscibility plays in the formation of macro-scale, bimodal volcanic/plutonic<br />igneous complexes, and Fe-Ti oxide deposits is debated as the rock compositions produced by immiscibility<br />are similar to those produced by other petrological processes. Within the flows of the North Mountain basalt<br />of the Central Atlantic Magmatic Province are centimeter-thick granophyre layers. The granophyre layers<br />are a mixture of mafic (i.e., ilmenite, magnetite, ferroaugite, plagioclase, stilpnomelane, ferrorichterite) and<br />felsic (i.e., sanidine, quartz) minerals and highly siliceous (>75 wt% SiO2) mesostases. Petrological<br />modeling indicates that the siliceous mesostasis + sanidine + quartz ± ferrorichterite represents a Si-rich<br />silicate immiscible melt whereas the ferroaugite + plagioclase + stilpnomelane represent the Fe-rich silicate<br />immiscible liquid. The identification of naturally occurring silicate-liquid immiscibility at scales greater<br />than micron level is an important observation which may be useful in identifying volcanic and plutonic<br />rocks which formed by macro-scale silicate-liquid immiscibility</p> |
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dc.description.provenance |
Submitted by Betty McEachern (betty.mceachern@smu.ca) on 2018-02-28T13:53:09Z
No. of bitstreams: 1
Dostal_J_article_2013.pdf: 744430 bytes, checksum: 8d8912a0ed78687a713e915641aed474 (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2018-02-28T13:53:09Z (GMT). No. of bitstreams: 1
Dostal_J_article_2013.pdf: 744430 bytes, checksum: 8d8912a0ed78687a713e915641aed474 (MD5)
Previous issue date: 2013 |
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dc.language.iso |
en |
en_CA |
dc.publisher |
American Geophysical Union |
en_CA |
dc.rights |
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user. |
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dc.subject.lcsh |
Basalt -- Nova Scotia -- McKay Head |
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dc.subject.lcsh |
Geochemical modeling |
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dc.title |
Evidence of silicate immiscibility within flood basalts from the Central Atlantic Magmatic Province |
en_CA |
dc.type |
Text |
en_CA |
dcterms.bibliographicCitation |
Geochemistry Geophysics Geosystems 14(11), 4921-4935. (2013), doi:10.1002/2013GC004977 |
en_CA |