Experiments on liquid immiscibility along tholeiitic liquid lines of descent
peer reviewed Crystallization experiments have been conducted on compositions along tholeiitic liquid lines of descent to define the compositional space for the development of silicate liquid immiscibility. Starting materials have 46-56 wt% SiO 2, 11.7-17.7 wt% FeO tot, and Mg-number between 0.29 an...
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ftorbi:oai:orbi.ulg.ac.be:2268/173800 2024-10-13T14:08:30+00:00 Experiments on liquid immiscibility along tholeiitic liquid lines of descent Charlier, Bernard Grove, T. L. 2012 https://orbi.uliege.be/handle/2268/173800 https://orbi.uliege.be/bitstream/2268/173800/1/Charlier_Grove_2012.pdf https://doi.org/10.1007/s00410-012-0723-y unknown Springer urn:issn:0010-7999 urn:issn:1432-0967 https://orbi.uliege.be/handle/2268/173800 info:hdl:2268/173800 https://orbi.uliege.be/bitstream/2268/173800/1/Charlier_Grove_2012.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Contributions to Mineralogy and Petrology, 164 (1), 27-44 (2012) Basalt Binodal Experimental petrology Ferrobasalt Layered intrusions Solvus Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2012 ftorbi https://doi.org/10.1007/s00410-012-0723-y 2024-09-27T07:01:52Z peer reviewed Crystallization experiments have been conducted on compositions along tholeiitic liquid lines of descent to define the compositional space for the development of silicate liquid immiscibility. Starting materials have 46-56 wt% SiO 2, 11.7-17.7 wt% FeO tot, and Mg-number between 0.29 and 0.36. These melts fall on the basaltic trends relevant for Mull, Iceland, Snake River Plain lavas and for the Sept Iles layered intrusion, where large-scale liquid immiscibility has been recognized. At one atmosphere under anhydrous conditions, immiscibility develops below 1,000-1,020°C in all of these compositionally diverse lavas. Extreme iron enrichment is not necessary; immiscibility also develops during iron depletion and silica enrichment. Variations in melt composition control the development of silicate liquid immiscibility along the tholeiitic trend. Elevation of Na 2O + K 2O + P 2O 5 + TiO 2 promotes the development of two immiscible liquids. Increasing melt CaO and Al 2O 3 stabilizes a single-liquid field. New data and published phase equilibria show that anhydrous, low-pressure fractional crystallization is the most favorable condition for unmixing during differentiation. Pressure inhibits immiscibility because it expands the stability field of high-Ca clinopyroxene, which reduces the proportion of plagioclase in the crystallizing assemblage, thus enhancing early iron depletion. Magma mixing between primitive basalt and Fe-Ti-P-rich ferrobasalts can serve to elevate phosphorous and alkali contents and thereby promote unmixing. Water might decrease the temperature and size of the two-liquid field, potentially shifting the binodal (solvus) below the liquidus, leading the system to evolve as a single-melt phase. © 2012 Springer-Verlag. Article in Journal/Newspaper Iceland University of Liège: ORBi (Open Repository and Bibliography) Mull ENVELOPE(-63.058,-63.058,-74.536,-74.536) Sept Iles ENVELOPE(139.989,139.989,-66.661,-66.661) Contributions to Mineralogy and Petrology 164 1 27 44 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
unknown |
topic |
Basalt Binodal Experimental petrology Ferrobasalt Layered intrusions Solvus Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Basalt Binodal Experimental petrology Ferrobasalt Layered intrusions Solvus Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Charlier, Bernard Grove, T. L. Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
topic_facet |
Basalt Binodal Experimental petrology Ferrobasalt Layered intrusions Solvus Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed Crystallization experiments have been conducted on compositions along tholeiitic liquid lines of descent to define the compositional space for the development of silicate liquid immiscibility. Starting materials have 46-56 wt% SiO 2, 11.7-17.7 wt% FeO tot, and Mg-number between 0.29 and 0.36. These melts fall on the basaltic trends relevant for Mull, Iceland, Snake River Plain lavas and for the Sept Iles layered intrusion, where large-scale liquid immiscibility has been recognized. At one atmosphere under anhydrous conditions, immiscibility develops below 1,000-1,020°C in all of these compositionally diverse lavas. Extreme iron enrichment is not necessary; immiscibility also develops during iron depletion and silica enrichment. Variations in melt composition control the development of silicate liquid immiscibility along the tholeiitic trend. Elevation of Na 2O + K 2O + P 2O 5 + TiO 2 promotes the development of two immiscible liquids. Increasing melt CaO and Al 2O 3 stabilizes a single-liquid field. New data and published phase equilibria show that anhydrous, low-pressure fractional crystallization is the most favorable condition for unmixing during differentiation. Pressure inhibits immiscibility because it expands the stability field of high-Ca clinopyroxene, which reduces the proportion of plagioclase in the crystallizing assemblage, thus enhancing early iron depletion. Magma mixing between primitive basalt and Fe-Ti-P-rich ferrobasalts can serve to elevate phosphorous and alkali contents and thereby promote unmixing. Water might decrease the temperature and size of the two-liquid field, potentially shifting the binodal (solvus) below the liquidus, leading the system to evolve as a single-melt phase. © 2012 Springer-Verlag. |
format |
Article in Journal/Newspaper |
author |
Charlier, Bernard Grove, T. L. |
author_facet |
Charlier, Bernard Grove, T. L. |
author_sort |
Charlier, Bernard |
title |
Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
title_short |
Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
title_full |
Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
title_fullStr |
Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
title_full_unstemmed |
Experiments on liquid immiscibility along tholeiitic liquid lines of descent |
title_sort |
experiments on liquid immiscibility along tholeiitic liquid lines of descent |
publisher |
Springer |
publishDate |
2012 |
url |
https://orbi.uliege.be/handle/2268/173800 https://orbi.uliege.be/bitstream/2268/173800/1/Charlier_Grove_2012.pdf https://doi.org/10.1007/s00410-012-0723-y |
long_lat |
ENVELOPE(-63.058,-63.058,-74.536,-74.536) ENVELOPE(139.989,139.989,-66.661,-66.661) |
geographic |
Mull Sept Iles |
geographic_facet |
Mull Sept Iles |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Contributions to Mineralogy and Petrology, 164 (1), 27-44 (2012) |
op_relation |
urn:issn:0010-7999 urn:issn:1432-0967 https://orbi.uliege.be/handle/2268/173800 info:hdl:2268/173800 https://orbi.uliege.be/bitstream/2268/173800/1/Charlier_Grove_2012.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00410-012-0723-y |
container_title |
Contributions to Mineralogy and Petrology |
container_volume |
164 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
44 |
_version_ |
1812815186400116736 |