Novel Amphibole Geo-barometer with Application to Mafic Xenoliths
Amphibole crystallization from hydrous high-magnesium andesite (Shiveluch volcano, Kamchatka) melt has been studied experimentally at pressures 2, 3, 5 kbar. Slightly subliquidus temperatures have been selected for amphibole crystallization. Amphiboles with close to the equilibrium composition have...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.460.5557 2023-05-15T16:58:52+02:00 Novel Amphibole Geo-barometer with Application to Mafic Xenoliths Er Simakin Olga Zakrevskaya Tamara Salova The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.5557 http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.5557 http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ amphibole geobarometer andesite 1. Introducation text ftciteseerx 2016-01-08T06:33:26Z Amphibole crystallization from hydrous high-magnesium andesite (Shiveluch volcano, Kamchatka) melt has been studied experimentally at pressures 2, 3, 5 kbar. Slightly subliquidus temperatures have been selected for amphibole crystallization. Amphiboles with close to the equilibrium composition have been obtained at low undercoolings in short 4 hours experiments. We select octahedral aluminium content and sum of high charged cations (Ti4+, Fe3+) all evaluated with the 13eCNK method as master parameters reflecting pressure of amphibole formation. Asymptotic maximum of AlVI content at the sum Ti+Fe3+ =0 as a function of pressure was calculated following negative linear correlation trend for each run of the original and published experimental data sets. The derived novel AlVI in amphibole barometer is calibrated in the pressure range of 2-12 kbar for andesitic and basaltic magmas. Reliability and validity of the new geobarometer were tested on the amphibolized ultramafic xenoliths from the Shiveluch Volcano (Kamchatka) and Dish Hill (California). In both cases our estimates appear to be equal within the uncertainty of the method to the predictions done by two-pyroxene geo-thermo-barometer (Putirka, 2008). Text Kamchatka Unknown |
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ftciteseerx |
language |
English |
topic |
amphibole geobarometer andesite 1. Introducation |
spellingShingle |
amphibole geobarometer andesite 1. Introducation Er Simakin Olga Zakrevskaya Tamara Salova Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
topic_facet |
amphibole geobarometer andesite 1. Introducation |
description |
Amphibole crystallization from hydrous high-magnesium andesite (Shiveluch volcano, Kamchatka) melt has been studied experimentally at pressures 2, 3, 5 kbar. Slightly subliquidus temperatures have been selected for amphibole crystallization. Amphiboles with close to the equilibrium composition have been obtained at low undercoolings in short 4 hours experiments. We select octahedral aluminium content and sum of high charged cations (Ti4+, Fe3+) all evaluated with the 13eCNK method as master parameters reflecting pressure of amphibole formation. Asymptotic maximum of AlVI content at the sum Ti+Fe3+ =0 as a function of pressure was calculated following negative linear correlation trend for each run of the original and published experimental data sets. The derived novel AlVI in amphibole barometer is calibrated in the pressure range of 2-12 kbar for andesitic and basaltic magmas. Reliability and validity of the new geobarometer were tested on the amphibolized ultramafic xenoliths from the Shiveluch Volcano (Kamchatka) and Dish Hill (California). In both cases our estimates appear to be equal within the uncertainty of the method to the predictions done by two-pyroxene geo-thermo-barometer (Putirka, 2008). |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Er Simakin Olga Zakrevskaya Tamara Salova |
author_facet |
Er Simakin Olga Zakrevskaya Tamara Salova |
author_sort |
Er Simakin |
title |
Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
title_short |
Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
title_full |
Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
title_fullStr |
Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
title_full_unstemmed |
Novel Amphibole Geo-barometer with Application to Mafic Xenoliths |
title_sort |
novel amphibole geo-barometer with application to mafic xenoliths |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.5557 http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ |
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Kamchatka |
genre_facet |
Kamchatka |
op_source |
http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.460.5557 http://www.ccsenet.org/journal/index.php/esr/article/download/15805/11964/ |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766050984007565312 |