| Title: | Identifying crystal nucleation mechanisms in a synthetic trachybasalt: a multimodal approach |
|---|
| Authors: | ID Peres, Stefano (Author)
ID Griffiths, Thomas A. (Author)
ID Colle, Fabio (Author)
ID Lelarge, Stefano Iannini (Author)
ID Masotta, Matteo (Author)
ID Pontesilli, Alessio (Author)
ID Mancini, Lucia (Author)
ID Abart, Rainer (Author) |
|---|
| Files: |  URL - Source URL, visit https://link.springer.com/article/10.1007/s00410-024-02161-w
 PDF - Presentation file, download (5,45 MB)
MD5: 82C4F54ED90300CE9A10C1D6C9FB2BDC
PDF - Supplement, download (1,11 MB)
MD5: 03A09497D5BC03302F8BD68CF6DF85A7
This document has even more files. Complete list of files is available
below. |
|---|
| Language: | English |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
|
|---|
| Abstract: | To develop new criteria to distinguish different crystal nucleation mechanisms in silicate melts, we performed crystallization experiments using a synthetic hydrous (2 wt% H2O) trachybasalt and combined three-dimensional information from synchrotron X-ray computed microtomography with two-dimensional mapping of crystallographic orientation relationships (CORs) using electron backscatter diffraction. Crystallization experiments were performed at 400 MPa by cooling the melt from 1300 °C to resting temperatures of 1150 and 1100 °C and maintaining isothermal conditions for 30 min and 8 h. Three distinct titanomagnetite (Tmt) populations formed: (1) skeletal crystals, isolated or partially embedded in clinopyroxene (Cpx); (2) anhedral crystals, always attached to Cpx; (3) flattened needle-shaped crystals, embedded in Cpx. These morphologically different Tmt populations formed in response to one cooling event, with varying nucleation mechanisms and at different undercooling conditions. The clustered three-dimensional distribution of population 2 and 3 Tmt grains and the high proportion of Tmt-Cpx interfaces sharing CORs indicate that these Tmt grains heterogeneously nucleated on Cpx. The near-random three-dimensional distribution of (often isolated) population 1 Tmt grains, together with the low proportion of Tmt-Cpx interfaces sharing CORs, imply their isolated, possibly homogeneous nucleation, potentially followed by heterogeneous nucleation of Cpx on population 1 Tmt. Heterogeneous nucleation in slightly to moderately undercooled magmas should affect the sequence of crystallization as well as morphology and clustering of crystals, which may actively contribute to the variation of rheological parameters like viscosity. Finally, observed intra- and inter-sample variations in Tmt-Cpx COR frequencies indicate the potential for this parameter to record further petrological information. |
|---|
| Keywords: | experimental petrology, nucleation mechanisms, X-ray microtomography, crystal clustering, heterogeneous nucleation |
|---|
| Publication status: | Published |
|---|
| Publication version: | Version of Record |
|---|
| Publication date: | 20.08.2024 |
|---|
| Publisher: | Springer |
|---|
| Year of publishing: | 2024 |
|---|
| Number of pages: | str. 1-21 |
|---|
| Numbering: | Vol. 179, article no. 84 |
|---|
| PID: | 20.500.12556/DiRROS-21001  |
|---|
| UDC: | 552 |
|---|
| ISSN on article: | 1432-0967 |
|---|
| DOI: | 10.1007/s00410-024-02161-w |
|---|
| COBISS.SI-ID: | 218155267 |
|---|
| Copyright: | © The Author(s) 2024 |
|---|
| Note: | © The Author(s) 2024 |
|---|
| Publication date in DiRROS: | 16.12.2024 |
|---|
| Views: | 56 |
|---|
| Downloads: | 42 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
