MafiCH: a general model for H2O–CO2 solubility in mafic magmas
MafiCH: a general model for H2O–CO2 solubility in mafic magmas
复制标题
MafiCH:镁铁质岩浆中 H2O−CO2 溶解度的通用模型
DOI:
10.1007/s00410-022-01903-y
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发表时间:
2022
影响因子:
3.5
通讯作者:
Clarke, Amanda B.
中科院分区:
文献类型:
--
作者:
Allison, Chelsea M.;Roggensack, Kurt;Clarke, Amanda B.
The solubility of CO2in mafic magmas is strongly dependent on magma composition, which ultimately affects magma storage conditions and eruptive behavior. Recent experimental work showed that previously published volatile solubility models for mafic magmas are not well calibrated at mid-crustal pressures (400–600 MPa). Using a simple thermodynamic model, here we construct a general CO2solubility model for mafic magmas by establishing the compositional dependence of two key thermodynamic parameters. The model is calibrated using experimental data from 10 magma compositions that span a range of pressures as well as silica (44–53 wt.%) and total alkali (2–9 wt.%) contents. We also survey the experimental literature for relevant H2O solubility data to determine how to model H2O solubility for these magmas. We combine these separate CO2and H2O solubility models into a single general model for mixed-fluid (H2O–CO2) solubility in mafic magmas called MafiCH. We test the MafiCH model using experiments from three compositions that fall both within and beyond the calibrated range, and find that the model accurately constrains the CO2solubility of depolymerized magmas. Sensitivity tests identify that Na, Ca, and Al have the largest effect on CO2solubility while Si and Mg do not play a strong role in CO2solubility in mafic, depolymerized melts. Overall, saturation pressures calculated using the new model presented here are typically lower than those predicted by previous models. The model provides a new framework to interpret volcanic data from mafic magma compositions for which no experimental data is available.
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影响因子:
5
作者:
Iacono-Marziano, Giada;Morizet, Yann;Gaillard, Fabrice
通讯作者:
Gaillard, Fabrice
影响因子:
3.5
作者:
Allison, Chelsea M.;Roggensack, Kurt;Clarke, Amanda B.
通讯作者:
Clarke, Amanda B.
影响因子:
3.9
作者:
R. Botcharnikov;M. Freise;F. Holtz;H. Behrens
通讯作者:
H. Behrens
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
P. Papale;M. Polacci
通讯作者:
M. Polacci
影响因子:
2.9
作者:
F. Vetere;R. Botcharnikov;F. Holtz;H. Behrens;R. Rosa
通讯作者:
R. Rosa