Plaster and magnets: Modelling magnetic fabric development in magma intrusions using scaled analogue experiments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F23%3A00572311" target="_blank" >RIV/67985530:_____/23:00572311 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S004019512300118X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S004019512300118X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tecto.2023.229820" target="_blank" >10.1016/j.tecto.2023.229820</a>
Alternative languages
Result language
angličtina
Original language name
Plaster and magnets: Modelling magnetic fabric development in magma intrusions using scaled analogue experiments
Original language description
Understanding magma behaviour during emplacement within the crust is vital for understanding the dynamic processes occurring in volcanic systems. However, linking the static record of magma flow to its dynamic origin is challenging, particularly as macroscopic indicators of magma flow are often not observed, absent and/or have been modified after emplacement. Anisotropy of magnetic susceptibility (AMS) has been used as an important tool in field studies to infer magma flow direction, using the magnetic fabric as a record of the magma intrusion dynamics and to identify magma source regions. Here, we describe a new method to explore magnetic fabric development in magma intrusions and lava flows using scaled analogue laboratory experiments. Coloured mixtures of Plaster of Paris (the magma analogue) seeded with magnetite particles were loaded concentrically into a piston and injected through a central port in the base of a box filled with compacted fine-grained wheat flour (the crust analogue). This created a series of interconnected sheet and tube-like 'magma' intrusions which eventually breached the surface to feed a model 'lava flow'. Once solidified, the intrusions were excavated and sampled for AMS, with the results showing that magnetic fabrics were preserved. A new dynamic scaling analysis shows the plaster mixture represents the intrusion of dacite magma into the shallow crust. These models provide proof-of-concept that this new methodology and scaling analysis can be used to explore AMS development in viscous (dacite) magma intrusions in nature, with the potential for direct comparison with field-based indicators of magma flow dynamics.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA22-12828S" target="_blank" >GA22-12828S: New perspectives in magnetic fabric interpretation through 3D microstructural analysis, numerical modelling and quantum mechanical description</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Tectonophysics
ISSN
0040-1951
e-ISSN
1879-3266
Volume of the periodical
855
Issue of the periodical within the volume
May
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
11
Pages from-to
229820
UT code for WoS article
000982114800001
EID of the result in the Scopus database
2-s2.0-85151797071