Experimental study of monazite solubility in haplogranitic melts: A new model for peraluminous and peralkaline melts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10394720" target="_blank" >RIV/00216208:11310/19:10394720 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~9sMEAXAMX" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~9sMEAXAMX</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1127/ejm/2019/0031-2801" target="_blank" >10.1127/ejm/2019/0031-2801</a>
Alternative languages
Result language
angličtina
Original language name
Experimental study of monazite solubility in haplogranitic melts: A new model for peraluminous and peralkaline melts
Original language description
Monazite is a common accessory mineral in peraluminous, metaluminous and peralkaline granitic/rhyolitic rocks. Considering the importance of monazite in geochemical and geochronological studies, a monazite solubility model that can be applied to a wide compositional range of magmas is desirable. To accomplish this, monazite solubility experiments were performed at atmospheric (1400 degrees C) and crustal pressures (1-3 kbar, 720-850 degrees C, H2O-saturated), using haplogranitic compositions ranging from peraluminous to peralkaline, doped with synthetic pure LaPO4. The concentrations of La in the melts increase sharply with increasing temperature and peralkalinity of the melt. We combined our new data with those of previous studies to describe the solubility of monazite in peralkaline to peraluminous melts. Our new monazite saturation model, which incorporates temperature, pressure, water content, melt and monazite composition is given by: ln Sigma LREE = 12.77(+/- 0.49) + 1.52(+/- 0.15)M + 0.44(+/- 0.10)(HO)(0.5)- 9934(+/- 632)/T - 36.79(+/- 6.15)P/T + lnX(mnz)(LREE) where Sigma LREE is the sum of the concentrations of La to Sm in monazite-saturated melt, in ppm, M is a dimensionless compositional parameter (Na + K + 2Ca) x Al-1 x (Al + Si)(-1), - similar to the compositional parameter used in an earlier model by Montel; Na, K, Ca, Al, Si are in moles, H2O is water content in weight percent, T is the temperature in K, P is the pressure in kbar, and X-mnz(LREE) is the mole fraction of LREE in monazite LREEmnz/ (LREEmnz+ Y-mnz+ Th-mnz+ U-mnz). This model reproduces 76% and > 95% of the data to within uncertainties of +/- 10% and +/- 20%, respectively. It may be applied to felsic melts poor in CaO + FeO + MgO ( < 3 wt%) from peraluminous to peralkaline compositions.
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
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OECD FORD branch
10505 - Geology
Result continuities
Project
<a href="/en/project/GA18-01982S" target="_blank" >GA18-01982S: Experimental determination of the effect of oxygen fugacity on mineral/melt partitioning for the Highly Siderophile Elements at mantle conditions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
European Journal of Mineralogy
ISSN
0935-1221
e-ISSN
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Volume of the periodical
31
Issue of the periodical within the volume
1
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
49-59
UT code for WoS article
000460524200004
EID of the result in the Scopus database
2-s2.0-85063617979