Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite
Rare type of silicate inclusions found in the Elga iron meteorite (group IIE) has a very specific mineral composition and shows silicate (≈90%)–natrophosphate (≈10%) liquid immiscibility due to meniscus-like isolation of Na-Ca-Mg-Fe phosphates. The 3 mm wide immiscible inclusion has been first studi...
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MDPI AG
2020
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fturalfuniv:oai:elar.urfu.ru:10995/90546 2024-01-21T10:11:09+01:00 Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite Sharygin, V. V. 2020 application/pdf http://elar.urfu.ru/handle/10995/90546 https://www.mdpi.com/2075-163X/10/5/437/pdf http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85085164620 https://doi.org/10.3390/min10050437 en eng MDPI AG Sharygin, V. V. Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite / V. V. Sharygin. — DOI 10.3390/min10050437 // Minerals. — 2020. — Vol. 5. — Iss. 10. — 437. 2075-163X https://www.mdpi.com/2075-163X/10/5/437/pdf 1 4e7399a3-71cf-4580-8b6d-ec16f7407def http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85085164620 http://elar.urfu.ru/handle/10995/90546 doi:10.3390/min10050437 85085164620 000548343700052 info:eu-repo/semantics/openAccess cc-by Minerals AENIGMATITE BRIANITE CZOCHRALSKIITE ELGA METEORITE IIE IRON KOSMOCHLOR MARIĆITE OBERTIITE SILICATE-NATROPHOSPHATE IMMISCIBILITY YAKUTIA Article info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 fturalfuniv https://doi.org/10.3390/min10050437 2023-12-26T01:59:18Z Rare type of silicate inclusions found in the Elga iron meteorite (group IIE) has a very specific mineral composition and shows silicate (≈90%)–natrophosphate (≈10%) liquid immiscibility due to meniscus-like isolation of Na-Ca-Mg-Fe phosphates. The 3 mm wide immiscible inclusion has been first studied in detail using optical microscopy, scanning electron microscopy, electron microprobe analysis and Raman spectroscopy. The silicate part of the inclusion contains fine-grained quartz-feldspar aggregate and mafic minerals. The relationships of feldspars indicate solid decay of initially homogenous K-Na-feldspar into albite and K-feldspar with decreasing of temperature. Some mafic minerals in the silicate part are exotic in composition: the dominant phase is an obertiite-subgroup oxyamphibole (amphibole supergroup), varying from ferri-obertiite NaNa2Mg3Fe3+Ti[Si8O22]O2 to hypothetical NaNa2Mg3Fe2+ 0.5Ti1.5[Si8O22]O2; minor phases are the aenigmatite-subgroup mineral (sapphirine supergroup) with composition close to median value of the Na2Fe2+ 5TiSi6O18O2-Na2Mg5TiSi6O18O2 join, orthopyroxene (enstatite), clinopyroxene of the diopside Ca(Mg,Fe)Si2O6–kosmochlor NaCrSi2O6-Na(Mg,Fe)0.5Ti0.5Si2O6 series and chromite. The alteration phases are represented by Fe-dominant chlorite, goethite and hydrated Na2O-rich (2.3–3.3 wt.%) Fe-phosphate close to vivianite. Natrophosphate part consists of aggregate of three orthophosphates (brianite, czochralskiite, marićite) and minor Na-Cr-Ti-clinopyroxene, pentlandite, rarely taenite. Czochralskiite Na4Ca3Mg(PO4)4 is rich in FeO (2.3–5.1 wt.%) and MnO (0.4–1.5 wt.%). Brianite Na2CaMg(PO4)2 contains FeO (3.0–4.3 wt.%) and MnO (0.3–0.7 wt.%) and marićite NaFe(PO4) bears MnO (5.5–6.2 wt.%), MgO (5.3–6.2 wt.%) and CaO (0.5–1.5 wt.%). The contact between immiscible parts is decorated by enstatite zone in the silicate part and diopside–kosmochlor clinopyroxene zone in the natrophosphate ones. The mineralogy of the studied immiscible inclusion outlines three potentially new mineral species, ... Article in Journal/Newspaper Yakutia Ural Federal University (URFU): ELAR Minerals 10 5 437 |
institution |
Open Polar |
collection |
Ural Federal University (URFU): ELAR |
op_collection_id |
fturalfuniv |
language |
English |
topic |
AENIGMATITE BRIANITE CZOCHRALSKIITE ELGA METEORITE IIE IRON KOSMOCHLOR MARIĆITE OBERTIITE SILICATE-NATROPHOSPHATE IMMISCIBILITY YAKUTIA |
spellingShingle |
AENIGMATITE BRIANITE CZOCHRALSKIITE ELGA METEORITE IIE IRON KOSMOCHLOR MARIĆITE OBERTIITE SILICATE-NATROPHOSPHATE IMMISCIBILITY YAKUTIA Sharygin, V. V. Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
topic_facet |
AENIGMATITE BRIANITE CZOCHRALSKIITE ELGA METEORITE IIE IRON KOSMOCHLOR MARIĆITE OBERTIITE SILICATE-NATROPHOSPHATE IMMISCIBILITY YAKUTIA |
description |
Rare type of silicate inclusions found in the Elga iron meteorite (group IIE) has a very specific mineral composition and shows silicate (≈90%)–natrophosphate (≈10%) liquid immiscibility due to meniscus-like isolation of Na-Ca-Mg-Fe phosphates. The 3 mm wide immiscible inclusion has been first studied in detail using optical microscopy, scanning electron microscopy, electron microprobe analysis and Raman spectroscopy. The silicate part of the inclusion contains fine-grained quartz-feldspar aggregate and mafic minerals. The relationships of feldspars indicate solid decay of initially homogenous K-Na-feldspar into albite and K-feldspar with decreasing of temperature. Some mafic minerals in the silicate part are exotic in composition: the dominant phase is an obertiite-subgroup oxyamphibole (amphibole supergroup), varying from ferri-obertiite NaNa2Mg3Fe3+Ti[Si8O22]O2 to hypothetical NaNa2Mg3Fe2+ 0.5Ti1.5[Si8O22]O2; minor phases are the aenigmatite-subgroup mineral (sapphirine supergroup) with composition close to median value of the Na2Fe2+ 5TiSi6O18O2-Na2Mg5TiSi6O18O2 join, orthopyroxene (enstatite), clinopyroxene of the diopside Ca(Mg,Fe)Si2O6–kosmochlor NaCrSi2O6-Na(Mg,Fe)0.5Ti0.5Si2O6 series and chromite. The alteration phases are represented by Fe-dominant chlorite, goethite and hydrated Na2O-rich (2.3–3.3 wt.%) Fe-phosphate close to vivianite. Natrophosphate part consists of aggregate of three orthophosphates (brianite, czochralskiite, marićite) and minor Na-Cr-Ti-clinopyroxene, pentlandite, rarely taenite. Czochralskiite Na4Ca3Mg(PO4)4 is rich in FeO (2.3–5.1 wt.%) and MnO (0.4–1.5 wt.%). Brianite Na2CaMg(PO4)2 contains FeO (3.0–4.3 wt.%) and MnO (0.3–0.7 wt.%) and marićite NaFe(PO4) bears MnO (5.5–6.2 wt.%), MgO (5.3–6.2 wt.%) and CaO (0.5–1.5 wt.%). The contact between immiscible parts is decorated by enstatite zone in the silicate part and diopside–kosmochlor clinopyroxene zone in the natrophosphate ones. The mineralogy of the studied immiscible inclusion outlines three potentially new mineral species, ... |
format |
Article in Journal/Newspaper |
author |
Sharygin, V. V. |
author_facet |
Sharygin, V. V. |
author_sort |
Sharygin, V. V. |
title |
Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
title_short |
Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
title_full |
Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
title_fullStr |
Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
title_full_unstemmed |
Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite |
title_sort |
mineralogy of silicate-natrophosphate immiscible inclusion in elga iie iron meteorite |
publisher |
MDPI AG |
publishDate |
2020 |
url |
http://elar.urfu.ru/handle/10995/90546 https://www.mdpi.com/2075-163X/10/5/437/pdf http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85085164620 https://doi.org/10.3390/min10050437 |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Minerals |
op_relation |
Sharygin, V. V. Mineralogy of silicate-natrophosphate immiscible inclusion in Elga IIE iron meteorite / V. V. Sharygin. — DOI 10.3390/min10050437 // Minerals. — 2020. — Vol. 5. — Iss. 10. — 437. 2075-163X https://www.mdpi.com/2075-163X/10/5/437/pdf 1 4e7399a3-71cf-4580-8b6d-ec16f7407def http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=85085164620 http://elar.urfu.ru/handle/10995/90546 doi:10.3390/min10050437 85085164620 000548343700052 |
op_rights |
info:eu-repo/semantics/openAccess cc-by |
op_doi |
https://doi.org/10.3390/min10050437 |
container_title |
Minerals |
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10 |
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5 |
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437 |
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