Vapor-phase crystallization from a hydrous silicate melt: an experimental simulation of diktytaxitic texture.
| Title: | Vapor-phase crystallization from a hydrous silicate melt: an experimental simulation of diktytaxitic texture. |
|---|---|
| Authors: | Sakurai, Ryosuke1 (AUTHOR) sakurai@eps.s.u-tokyo.ac.jp, Nakamura, Michihiko2 (AUTHOR), Okumura, Satoshi2 (AUTHOR), Mujin, Mayumi2,3 (AUTHOR), Nakatani, Takayuki4 (AUTHOR) |
| Source: | Contributions to Mineralogy & Petrology. Mar2024, Vol. 179 Issue 3, p1-20. 20p. |
| Subject Terms: | *LAVA domes, *CRYSTALLIZATION, *HYDROUS, *CRISTOBALITE, *VOLCANIC ash, tuff, etc., *FILTERS & filtration, *SUPERCOOLED liquids |
| Abstract: | Groundmass textures of volcanic rocks provide valuable insights into the processes of magma ascent, crystallization, and eruption. The diktytaxitic texture, characterized by a lath-shaped arrangement of feldspar microlites forming glass-free and angular pores, is commonly observed in silicic dome-forming rocks and Vulcanian ashfall deposits. This texture has the potential to control the explosivity of volcanic eruptions because its micropore network allows pervasive degassing during the final stages of magma ascent and eruption. However, the exact conditions and kinetics of the formation of diktytaxitic textures, which are often accompanied by vapor-phase cristobalite, remain largely unknown. Here, we show that the diktytaxitic texture and vapor-phase minerals, cristobalite and alkali feldspar, can be produced from bulk-andesitic magma with rhyolitic glass under water-saturated, near-solidus conditions (± ~10 MPa and ± ~20 °C within the solidus; 10–20 MPa and 850 °C for our starting pumices). Such crystallization proceeds through the partial evaporation of the supercooled melt, followed by the deposition of cristobalite and alkali feldspar as a result of the system selecting the fastest crystallization pathway with the lowest activation energy. The previously proposed mechanisms of halogen-induced corrosion or melt segregation by gas-driven filter pressing are not particularly necessary, although they may occur concurrently. Diktytaxitic groundmass formation is completed within 4–8 days, irrespective of the presence or composition of the halogen. These findings constrain the outgassing of lava domes and shallow magma intrusions and provide new insights into the final stages of hydrous magma crystallization on Earth. [ABSTRACT FROM AUTHOR] |
| Copyright of Contributions to Mineralogy & Petrology is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Academic Search Complete |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://resolver.ebsco.com/c/xy5jbn/result?sid=EBSCO:a9h&genre=article&issn=00107999&ISBN=&volume=179&issue=3&date=20240301&spage=1&pages=1-20&title=Contributions to Mineralogy & Petrology&atitle=Vapor-phase%20crystallization%20from%20a%20hydrous%20silicate%20melt%3A%20an%20experimental%20simulation%20of%20diktytaxitic%20texture.&aulast=Sakurai%2C%20Ryosuke&id=DOI:10.1007/s00410-024-02105-4 Name: Full Text Finder (for New FTF UI) (s8985755) Category: fullText Text: Find It @ SCU Libraries MouseOverText: Find It @ SCU Libraries |
|---|---|
| Header | DbId: a9h DbLabel: Academic Search Complete An: 176354663 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Vapor-phase crystallization from a hydrous silicate melt: an experimental simulation of diktytaxitic texture. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sakurai%2C+Ryosuke%22">Sakurai, Ryosuke</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sakurai@eps.s.u-tokyo.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Nakamura%2C+Michihiko%22">Nakamura, Michihiko</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Okumura%2C+Satoshi%22">Okumura, Satoshi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mujin%2C+Mayumi%22">Mujin, Mayumi</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nakatani%2C+Takayuki%22">Nakatani, Takayuki</searchLink><relatesTo>4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Contributions+to+Mineralogy+%26+Petrology%22">Contributions to Mineralogy & Petrology</searchLink>. Mar2024, Vol. 179 Issue 3, p1-20. 20p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22LAVA+domes%22">LAVA domes</searchLink><br />*<searchLink fieldCode="DE" term="%22CRYSTALLIZATION%22">CRYSTALLIZATION</searchLink><br />*<searchLink fieldCode="DE" term="%22HYDROUS%22">HYDROUS</searchLink><br />*<searchLink fieldCode="DE" term="%22CRISTOBALITE%22">CRISTOBALITE</searchLink><br />*<searchLink fieldCode="DE" term="%22VOLCANIC+ash%2C+tuff%2C+etc%2E%22">VOLCANIC ash, tuff, etc.</searchLink><br />*<searchLink fieldCode="DE" term="%22FILTERS+%26+filtration%22">FILTERS & filtration</searchLink><br />*<searchLink fieldCode="DE" term="%22SUPERCOOLED+liquids%22">SUPERCOOLED liquids</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Groundmass textures of volcanic rocks provide valuable insights into the processes of magma ascent, crystallization, and eruption. The diktytaxitic texture, characterized by a lath-shaped arrangement of feldspar microlites forming glass-free and angular pores, is commonly observed in silicic dome-forming rocks and Vulcanian ashfall deposits. This texture has the potential to control the explosivity of volcanic eruptions because its micropore network allows pervasive degassing during the final stages of magma ascent and eruption. However, the exact conditions and kinetics of the formation of diktytaxitic textures, which are often accompanied by vapor-phase cristobalite, remain largely unknown. Here, we show that the diktytaxitic texture and vapor-phase minerals, cristobalite and alkali feldspar, can be produced from bulk-andesitic magma with rhyolitic glass under water-saturated, near-solidus conditions (± ~10 MPa and ± ~20 °C within the solidus; 10–20 MPa and 850 °C for our starting pumices). Such crystallization proceeds through the partial evaporation of the supercooled melt, followed by the deposition of cristobalite and alkali feldspar as a result of the system selecting the fastest crystallization pathway with the lowest activation energy. The previously proposed mechanisms of halogen-induced corrosion or melt segregation by gas-driven filter pressing are not particularly necessary, although they may occur concurrently. Diktytaxitic groundmass formation is completed within 4–8 days, irrespective of the presence or composition of the halogen. These findings constrain the outgassing of lava domes and shallow magma intrusions and provide new insights into the final stages of hydrous magma crystallization on Earth. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Contributions to Mineralogy & Petrology is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://login.libproxy.scu.edu/login?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&scope=site&db=a9h&AN=176354663 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00410-024-02105-4 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 1 Subjects: – SubjectFull: LAVA domes Type: general – SubjectFull: CRYSTALLIZATION Type: general – SubjectFull: HYDROUS Type: general – SubjectFull: CRISTOBALITE Type: general – SubjectFull: VOLCANIC ash, tuff, etc. Type: general – SubjectFull: FILTERS & filtration Type: general – SubjectFull: SUPERCOOLED liquids Type: general Titles: – TitleFull: Vapor-phase crystallization from a hydrous silicate melt: an experimental simulation of diktytaxitic texture. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sakurai, Ryosuke – PersonEntity: Name: NameFull: Nakamura, Michihiko – PersonEntity: Name: NameFull: Okumura, Satoshi – PersonEntity: Name: NameFull: Mujin, Mayumi – PersonEntity: Name: NameFull: Nakatani, Takayuki IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 00107999 Numbering: – Type: volume Value: 179 – Type: issue Value: 3 Titles: – TitleFull: Contributions to Mineralogy & Petrology Type: main |
| ResultId | 1 |