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Hydrosilicate liquids in the system Na2O-SiO2-H2O with NaF, NaCl and Ta: evaluation of their role in ore and mineral formation at high T and P
Citation
Smirnov, SZ and Thomas, VG and Kamenetsky, VS and Kozmenko, OA and Large, RR, Hydrosilicate liquids in the system Na2O-SiO2-H2O with NaF, NaCl and Ta: evaluation of their role in ore and mineral formation at high T and P, Petrology, 20, (3) pp. 271-285. ISSN 0869-5911 (2012) [Refereed Article]
Copyright Statement
Copyright 2012 Pleiades Publishing
DOI: doi:10.1134/S0869591112020063
Abstract
Consideration of the existence of hydrosilicate liquids (HSL) in nature can help in understanding the accumulation and transport of some mineral- and ore-forming components at the transition from magmas to hydrothermal fluids. We studied the experimental formation of HSL using a base system Na 2O-SiO 2-H 2O with addition of NaF, NaCl and metallic Ta. The interaction between quartz and aqueous solution, performed at 1. 5 kbar and 600°C and followed either by cooling or by quench, showed that the formation of HSL occurred when initial Na 2O exceeded 2 wt %. Neither NaF nor NaCl have a significant effect on the formation of HSL. The HSL concentrates F, whereas Cl partitions into the aqueous fluid. With addition of Ta to the system, the HSL becomes metal-enriched. Natural analogs of experimental HSL can be found among "melt/fluid" inclusions entrapped in quartz and other minerals of miaroles in granite pegmatites and raremetal granites. The HSL is a novel medium enabling extreme concentrations of lithophile ore metals at the magmatic-hydrothermal transition. © 2012 Pleiades Publishing, Ltd.
Item Details
Item Type: | Refereed Article |
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Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Igneous and metamorphic petrology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Kamenetsky, VS (Professor Vadim Kamenetsky) |
UTAS Author: | Large, RR (Professor Ross Large) |
ID Code: | 81370 |
Year Published: | 2012 |
Funding Support: | Australian Research Council (CE0561595) |
Web of Science® Times Cited: | 25 |
Deposited By: | Centre for Ore Deposit Research - CODES CoE |
Deposited On: | 2012-12-03 |
Last Modified: | 2013-07-01 |
Downloads: | 0 |
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