Experimental constraints on the crystallization of natrocarbonatitic lava flows
Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. He...
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| Autor*in: |
Mattsson, Hannes B. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2009 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 2009 |
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| Übergeordnetes Werk: |
Enthalten in: Bulletin of volcanology - Springer-Verlag, 1986, 71(2009), 10 vom: 29. Mai, Seite 1179-1193 |
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| Übergeordnetes Werk: |
volume:71 ; year:2009 ; number:10 ; day:29 ; month:05 ; pages:1179-1193 |
| Links: |
|---|
| DOI / URN: |
10.1007/s00445-009-0288-4 |
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OLC2054802085 |
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| 245 | 1 | 0 | |a Experimental constraints on the crystallization of natrocarbonatitic lava flows |
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| 520 | |a Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. | ||
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10.1007/s00445-009-0288-4 doi (DE-627)OLC2054802085 (DE-He213)s00445-009-0288-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Mattsson, Hannes B. verfasserin aut Experimental constraints on the crystallization of natrocarbonatitic lava flows 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2009 Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. Natrocarbonatite Oldoinyo Lengai Crystal size distributions Textural coarsening Cooling Rheology Caricchi, Luca aut Enthalten in Bulletin of volcanology Springer-Verlag, 1986 71(2009), 10 vom: 29. Mai, Seite 1179-1193 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:71 year:2009 number:10 day:29 month:05 pages:1179-1193 https://doi.org/10.1007/s00445-009-0288-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_285 GBV_ILN_381 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_4112 GBV_ILN_4277 GBV_ILN_4323 AR 71 2009 10 29 05 1179-1193 |
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10.1007/s00445-009-0288-4 doi (DE-627)OLC2054802085 (DE-He213)s00445-009-0288-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Mattsson, Hannes B. verfasserin aut Experimental constraints on the crystallization of natrocarbonatitic lava flows 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2009 Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. Natrocarbonatite Oldoinyo Lengai Crystal size distributions Textural coarsening Cooling Rheology Caricchi, Luca aut Enthalten in Bulletin of volcanology Springer-Verlag, 1986 71(2009), 10 vom: 29. Mai, Seite 1179-1193 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:71 year:2009 number:10 day:29 month:05 pages:1179-1193 https://doi.org/10.1007/s00445-009-0288-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_285 GBV_ILN_381 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_4112 GBV_ILN_4277 GBV_ILN_4323 AR 71 2009 10 29 05 1179-1193 |
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10.1007/s00445-009-0288-4 doi (DE-627)OLC2054802085 (DE-He213)s00445-009-0288-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Mattsson, Hannes B. verfasserin aut Experimental constraints on the crystallization of natrocarbonatitic lava flows 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2009 Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. Natrocarbonatite Oldoinyo Lengai Crystal size distributions Textural coarsening Cooling Rheology Caricchi, Luca aut Enthalten in Bulletin of volcanology Springer-Verlag, 1986 71(2009), 10 vom: 29. Mai, Seite 1179-1193 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:71 year:2009 number:10 day:29 month:05 pages:1179-1193 https://doi.org/10.1007/s00445-009-0288-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_285 GBV_ILN_381 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_4112 GBV_ILN_4277 GBV_ILN_4323 AR 71 2009 10 29 05 1179-1193 |
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10.1007/s00445-009-0288-4 doi (DE-627)OLC2054802085 (DE-He213)s00445-009-0288-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Mattsson, Hannes B. verfasserin aut Experimental constraints on the crystallization of natrocarbonatitic lava flows 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2009 Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. Natrocarbonatite Oldoinyo Lengai Crystal size distributions Textural coarsening Cooling Rheology Caricchi, Luca aut Enthalten in Bulletin of volcanology Springer-Verlag, 1986 71(2009), 10 vom: 29. Mai, Seite 1179-1193 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:71 year:2009 number:10 day:29 month:05 pages:1179-1193 https://doi.org/10.1007/s00445-009-0288-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_285 GBV_ILN_381 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_4112 GBV_ILN_4277 GBV_ILN_4323 AR 71 2009 10 29 05 1179-1193 |
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10.1007/s00445-009-0288-4 doi (DE-627)OLC2054802085 (DE-He213)s00445-009-0288-4-p DE-627 ger DE-627 rakwb eng 550 VZ 550 VZ Mattsson, Hannes B. verfasserin aut Experimental constraints on the crystallization of natrocarbonatitic lava flows 2009 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2009 Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. Natrocarbonatite Oldoinyo Lengai Crystal size distributions Textural coarsening Cooling Rheology Caricchi, Luca aut Enthalten in Bulletin of volcanology Springer-Verlag, 1986 71(2009), 10 vom: 29. Mai, Seite 1179-1193 (DE-627)130428833 (DE-600)635594-8 (DE-576)015927865 0258-8900 nnns volume:71 year:2009 number:10 day:29 month:05 pages:1179-1193 https://doi.org/10.1007/s00445-009-0288-4 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-GEO SSG-OPC-GEO SSG-OPC-GGO GBV_ILN_40 GBV_ILN_267 GBV_ILN_285 GBV_ILN_381 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_4112 GBV_ILN_4277 GBV_ILN_4323 AR 71 2009 10 29 05 1179-1193 |
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experimental constraints on the crystallization of natrocarbonatitic lava flows |
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Experimental constraints on the crystallization of natrocarbonatitic lava flows |
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Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. © Springer-Verlag 2009 |
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Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. © Springer-Verlag 2009 |
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Abstract Natrocarbonatitic magmas are characterized by their extremely low viscosities and fast elemental diffusion, and as a consequence of this, their chemistry and crystallinity can change significantly during residence in shallow reservoirs or even due to cooling during lava flow emplacement. Here, we present the results of a series of crystallization experiments conducted at 1-atm confining pressure and in a temperature range between 630°C and 300°C. The experiments were set up to characterize the chemistry and growth processes of the phenocryst phases present in natrocarbonatites. The results are applicable to (1) processes occurring during residence in shallow magma reservoirs and/or (2) during lava flow emplacement. We show that during crystallization of natrocarbonatites at atmospheric pressure, gregoryite is the first mineral to crystallize at 630°C, followed by nyerereite at 595°C. Crystal size distributions of the gregoryites show that the crystals grow rapidly by textural coarsening (i.e., Ostwald ripening). As the crystallization is a continuous process at this pressure, the composition of the residual melt changes in response to the crystallization. However, the experiments also show that individual crystals completely reequilibrate with the changes in melt composition in as little time as <11 min. We therefore conclude that crystallization and diffusion are extremely fast processes in the natrocarbonatitic system and that the measured chemical variations in phenocrysts from Oldoinyo Lengai can be explained by different cooling histories. Finally, we model the rheological control on the emplacement of highly crystallized natrocarbonatitic lavas at Oldoinyo Lengai. © Springer-Verlag 2009 |
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