TY - JOUR
T1 - Dendritic crystallization in hydrous basaltic magmas controls magma mobility within the Earth’s crust
AU - Arzilli, Fabio
AU - Polacci, Margherita
AU - La Spina, Giuseppe
AU - Le Gall, Nolwenn
AU - Llewellin, Edward W.
AU - Brooker, Richard A.
AU - Torres Orozco, Rafael
AU - Di Genova, Danilo
AU - Neave, David
AU - Hartley, Margaret
AU - Mader, Heidy M.
AU - Giordano, Daniele
AU - Atwood, Robert
AU - Lee, Peter
AU - Heidelbach, Florian
AU - Burton, Mike
N1 - Funding Information:
The research leading to these results has received funding from the RCUK NERC DisEqm project (NE/N018575/1) and (NE/M013561/1) (Principal Investigator of DisEqm project is Mike R. Burton). Peter D. Lee acknowledges support from the Royal Academy of Engineering his Chair in Emerging Technologies (CiET1819/10). The beamtime on I12 was provided by Diamond Light Source (EE16188-1) and laboratory space by the Research Complex at Harwell. David A. Neave acknowledges support from NERC (NE/T011106/1). Danilo Di Genova acknowledges funding by Deutsche Forschungsgemeinschaft (DFG) projects DI 2751/2-1.
Funding Information:
The research leading to these results has received funding from the RCUK NERC DisEqm project (NE/N018575/1) and (NE/M013561/1) (Principal Investigator of DisEqm project is Mike R. Burton). Peter D. Lee acknowledges support from the Royal Academy of Engineering his Chair in Emerging Technologies (CiET1819/10). The beamtime on I12 was provided by Diamond Light Source (EE16188-1) and laboratory space by the Research Complex at Harwell. David A. Neave acknowledges support from NERC (NE/T011106/1). Danilo Di Genova acknowledges funding by Deutsche Forschungsgemeinschaft (DFG) projects DI 2751/2-1.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/6/10
Y1 - 2022/6/10
N2 - The majority of basaltic magmas stall in the Earth’s crust as a result of the rheological evolution caused by crystallization during transport. However, the relationships between crystallinity, rheology and eruptibility remain uncertain because it is difficult to observe dynamic magma crystallization in real time. Here, we present the first in-situ 4D data for crystal growth kinetics and the textural evolution of pyroxene during crystallization of trachybasaltic magmas in high-temperature experiments under water-saturated conditions at crustal pressures. We observe dendritic growth of pyroxene on initially euhedral cores, and a surprisingly rapid increase in crystal fraction and aspect ratio at undercooling ≥30 °C. Rapid dendritic crystallization favours a rheological transition from Newtonian to non-Newtonian behaviour within minutes. We use a numerical model to quantify the impact of rapid dendritic crystallization on basaltic dike propagation, and demonstrate its dramatic effect on magma mobility and eruptibility. Our results provide new insights into the processes that control whether intrusions lead to eruption or not.
AB - The majority of basaltic magmas stall in the Earth’s crust as a result of the rheological evolution caused by crystallization during transport. However, the relationships between crystallinity, rheology and eruptibility remain uncertain because it is difficult to observe dynamic magma crystallization in real time. Here, we present the first in-situ 4D data for crystal growth kinetics and the textural evolution of pyroxene during crystallization of trachybasaltic magmas in high-temperature experiments under water-saturated conditions at crustal pressures. We observe dendritic growth of pyroxene on initially euhedral cores, and a surprisingly rapid increase in crystal fraction and aspect ratio at undercooling ≥30 °C. Rapid dendritic crystallization favours a rheological transition from Newtonian to non-Newtonian behaviour within minutes. We use a numerical model to quantify the impact of rapid dendritic crystallization on basaltic dike propagation, and demonstrate its dramatic effect on magma mobility and eruptibility. Our results provide new insights into the processes that control whether intrusions lead to eruption or not.
UR - http://www.scopus.com/inward/record.url?scp=85131797820&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/8044b941-e64f-32f7-907c-ab7102af7c24/
U2 - 10.1038/s41467-022-30890-8
DO - 10.1038/s41467-022-30890-8
M3 - Article
C2 - 35688812
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3354
ER -