An experimental study of phase equilibria in the systems H2O-CO2-CaCl2 and H2O-CO2-NaCl at high pressures and temperatures (500-800°C, 0.5-0.9 GPa); geological and geophysical applications

Saved in:
Online Access: Get full text
doi: 10.1007/s00410-003-0507-5
Authors:Shmulovich, Kirill I.; Graham, Colin M.
Author Affiliations:Primary:
University of Edinburgh, School of Geo Sciences, Edinburgh, United Kingdom
Other:
Russian Academy of Sciences, Russian Federation
Volume Title:Contributions to Mineralogy and Petrology
Source:Contributions to Mineralogy and Petrology, 146(4), p.450-462. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999
Publication Date:2004
Note:In English. 48 refs.; illus., incl. 4 tables
Summary:Phase equilibria in the ternary systems H2O-CO2-CaCl2 and H2O-CO2-NaCI have been determined from the study of synthetic fluid inclusions in quartz at 500 and 800 oC, 0.5 and 0.9 GPa. The crystallographic control on rates of quartz overgrowth on synthetic quartz crystals was exploited to prevent trapping of fluid inclusions prior to attainment of run conditions. In ternary systems, homogeneous fluids are H2O-rich and of extremely low salinity, but at medium to high concentrations of salts and non-polar gases fluids are unlikely to be homogeneous. The two-phase state of crustal fluids should be common. For low fluid-rock ratios the cation compositions of crustal fluids are buffered by major crustal minerals: feldspars and micas in pelites and granitic rocks, calcite (dolomite) in carbonates, and pyroxenes and amphiboles in metabasites. Fluids in pelitic and granitic rocks are Na-K rich, while for carbonate and metabasic rocks fluids are Ca-Mg-Fe rich. On lithological boundaries between silicate and carbonate rocks, or between pelites and metabasites, diffusive cation exchange of the salt components of the fluid will cause the surfaces of immiscibility to intersect, leading to unmixing in the fluid phase. Dispersion of acoustic energy at critical conditions of the fluid may amplify seismic reflections that result from different fluid densities on lithological boundaries. [G.L.B.]
Sections:Experimental mineralogy; Geochemistry
Subsections:General
Subjects:Body waves; Calcium chloride; Carbon dioxide; Chemical composition; COCORP; Crust; Elastic waves; Experimental studies; Fluid inclusions; Fluid phase; Framework silicates; Gaseous phase; Geochemistry; Geophysical methods; Geophysical surveys; High pressure; High temperature; Inclusions; Metabasite; Metaigneous rocks; Metamorphic rocks; P-T conditions; P-waves; Phase equilibria; Pressure; Quartz; Reflection methods; S-waves; Seismic methods; Seismic stratigraphy; Seismic waves; Seismology; Silica minerals; Silicates; Sodium chloride; Solubility; Surveys; Synthetic materials; Temperature; Water
Abstract Numbers:04M/1229
04M/917
Record ID:2004031404
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
Tags: Add Tag
No Tags, Be the first to tag this record!
LEADER 05061naaaa2200841zu 4500
001 2004031404
003 ViAlAGI
005 20190222150803.0
008 190110e200401 vp a 0 0 eng d
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 05A  |2 georeft 
072 7 |a 20  |2 georeft 
100 1 |a Shmulovich, Kirill I.  |e analytic author  |u University of Edinburgh, School of Geo Sciences, Edinburgh 
245 1 3 |a An experimental study of phase equilibria in the systems H<2`O-CO<2`-CaCl<2` and H<2`O-CO<2`-NaCl at high pressures and temperatures (500-800°C, 0.5-0.9 GPa); geological and geophysical applications 
300 |a p. 450-462 
500 |a In English. 48 refs. 
500 |a Abstract number: 04M/1229 
500 |a Abstract number: 04M/917 
500 |a Abstractor: G.L.B. 
500 |a Category Section: Experimental mineralogy 
500 |a Category Section: Geochemistry 
500 |a Category Subsection: General 
500 |a Affiliation: University of Edinburgh, School of Geo Sciences; Edinburgh; GBR; United Kingdom 
500 |a Affiliation: Russian Academy of Sciences; ; RUS; Russian Federation 
500 |a Key title: Contributions to Mineralogy and Petrology 
500 |a Source note: Contributions to Mineralogy and Petrology, 146(4), p.450-462. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999 
500 |a Publication type: journal article 
504 |b 48 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a Phase equilibria in the ternary systems H<2`O-CO<2`-CaCl<2` and H<2`O-CO<2`-NaCI have been determined from the study of synthetic fluid inclusions in quartz at 500 and 800 >o`C, 0.5 and 0.9 GPa. The crystallographic control on rates of quartz overgrowth on synthetic quartz crystals was exploited to prevent trapping of fluid inclusions prior to attainment of run conditions. In ternary systems, homogeneous fluids are H<2`O-rich and of extremely low salinity, but at medium to high concentrations of salts and non-polar gases fluids are unlikely to be homogeneous. The two-phase state of crustal fluids should be common. For low fluid-rock ratios the cation compositions of crustal fluids are buffered by major crustal minerals: feldspars and micas in pelites and granitic rocks, calcite (dolomite) in carbonates, and pyroxenes and amphiboles in metabasites. Fluids in pelitic and granitic rocks are Na-K rich, while for carbonate and metabasic rocks fluids are Ca-Mg-Fe rich. On lithological boundaries between silicate and carbonate rocks, or between pelites and metabasites, diffusive cation exchange of the salt components of the fluid will cause the surfaces of immiscibility to intersect, leading to unmixing in the fluid phase. Dispersion of acoustic energy at critical conditions of the fluid may amplify seismic reflections that result from different fluid densities on lithological boundaries. 
650 7 |a Body waves  |2 georeft 
650 7 |a Calcium chloride  |2 georeft 
650 7 |a Carbon dioxide  |2 georeft 
650 7 |a Chemical composition  |2 georeft 
650 7 |a COCORP  |2 georeft 
650 7 |a Crust  |2 georeft 
650 7 |a Elastic waves  |2 georeft 
650 7 |a Experimental studies  |2 georeft 
650 7 |a Fluid inclusions  |2 georeft 
650 7 |a Fluid phase  |2 georeft 
650 7 |a Framework silicates  |2 georeft 
650 7 |a Gaseous phase  |2 georeft 
650 7 |a Geochemistry  |2 georeft 
650 7 |a Geophysical methods  |2 georeft 
650 7 |a Geophysical surveys  |2 georeft 
650 7 |a High pressure  |2 georeft 
650 7 |a High temperature  |2 georeft 
650 7 |a Inclusions  |2 georeft 
650 7 |a Metabasite  |2 georeft 
650 7 |a Metaigneous rocks  |2 georeft 
650 7 |a Metamorphic rocks  |2 georeft 
650 7 |a P-T conditions  |2 georeft 
650 7 |a P-waves  |2 georeft 
650 7 |a Phase equilibria  |2 georeft 
650 7 |a Pressure  |2 georeft 
650 7 |a Quartz  |2 georeft 
650 7 |a Reflection methods  |2 georeft 
650 7 |a S-waves  |2 georeft 
650 7 |a Seismic methods  |2 georeft 
650 7 |a Seismic stratigraphy  |2 georeft 
650 7 |a Seismic waves  |2 georeft 
650 7 |a Seismology  |2 georeft 
650 7 |a Silica minerals  |2 georeft 
650 7 |a Silicates  |2 georeft 
650 7 |a Sodium chloride  |2 georeft 
650 7 |a Solubility  |2 georeft 
650 7 |a Surveys  |2 georeft 
650 7 |a Synthetic materials  |2 georeft 
650 7 |a Temperature  |2 georeft 
650 7 |a Water  |2 georeft 
700 1 |a Graham, Colin M.,  |e analytic author  |u Russian Academy of Sciences 
773 0 |t Contributions to Mineralogy and Petrology  |d Heidelberg-New York : Springer International, Jan. 2004  |x 0010-7999  |y CMPEAP  |n Contributions to Mineralogy and Petrology, 146(4), p.450-462. Publisher: Springer International, Heidelberg-New York, International. ISSN: 0010-7999 Publication type: journal article  |g Vol. 146, no. 4  |h illus., incl. 4 tables 
856 |u urn:doi: 10.1007/s00410-003-0507-5