Advertisement

Contributions to Mineralogy and Petrology

, Volume 119, Issue 4, pp 433–440 | Cite as

Mixing properties and stability of jadeite-acmite pyroxene in the presence of albite and quartz

  • Jun Liu
  • Steven R. Bohlen
Article

Abstract

The stability of synthetic jadeite-acmite pyroxene coexisting with albite and quartz has been determined at 600, 700, and 900° C. The end-member reaction: albite = jadeite + quartz has been determined to lie between 1.67 and 1.70 GPa at 600° C, 1.88 and 1.90 GPa at 700° C, and 2.44 and 2.48 GPa at 900° C. Jd78Acm22 + quartz is stable above 1.58, 1.78, and 2.33 GPa at 600, 700, and 900° C, respectively. Jd61Acm39 + quartz is stable above 1.47, 1.67, and 2.18 GPa at 600, 700, and 900° C, respectively. Addition of as much as 40% of acmite component in jadeite extends pyroxene stability by less than 300 MPa at 900° C. Unit-cell parameters measured for synthetic jadeite-acmite pyroxenes indicate linear volume-composition relations. The data are consistent with ideal mixing in jadeite-acmite solutions.

Keywords

Quartz Mineral Resource Acmite Component 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Berman RG (1988) Internally consistent thermodynamic data for minerals in the system Na2O−K2O−CaO−MgO−FeO−Fe2O3−Al2O3−SiO2−TiO2−H2O−CO2. J Petrol 29:445–522Google Scholar
  2. Birch F, Le Comte P (1960) Temperature-pressure plane for albite composition. Am J Sci 258:209–217Google Scholar
  3. Boettcher AL, Wyllie PJ (1968) Jadeite stability measured in the presence of silicate liquids in the system NaAlSiO4−SiO2−H2O. Geochim Cosmochim Acta 32:999–1012Google Scholar
  4. Bohlen RS (1984) Equilibria for precise pressure calibration and a frictionless furnace assembly for the piston-cylinder apparatus. Neues Jahrb Mineral Monatsh (9):404–412Google Scholar
  5. Cameron M, Sueno S, Prewitt CT, Papike JJ (1973) High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene, and ureyite. Am Mineral 58:594–618Google Scholar
  6. Carpenter MA (1981) Time-Temperature-Transformation analysis of cation disordering in omphacite. Contrib Mineral Petrol 78:433–440Google Scholar
  7. Carpenter MA, Smith DC (1981) Solid solution and cation ordering limits in high-temperature sodic pyroxenes from the Nybo eclogite pod, Norway. Mineral Mag 44:37–44Google Scholar
  8. Carpenter MA, McConnell J DC (1984) Experimental delineation of the C1=I1 transformation in intermediate plagioclase feldspars. Am Mineral 69:112–121Google Scholar
  9. Coleman RG, Clark JR (1968) Pyroxene in the blueschist facies of California. Am J Sci 266:43–59Google Scholar
  10. Ganguly J (1973) Activity-composition relation of jadeite in omphacite pyroxene: theoretical deductions. Earth Planet Sci Lett 19:145–153Google Scholar
  11. Gasparik T (1985a) Experimental determined compositions of diopside-jadeite pyroxene in equilibrium with albite and quartz at 1200–1350° C and 15–34 kbar. Geochim Cosmochim Acta 49:865–870Google Scholar
  12. Gasparik T (1985b) Experimental study of subsolidus phase relations and mixing properties of pyroxene and plagioclase in the system Na2O−CaO−Al2O3−SiO2. Contrib Mineral Petrol 89:346–357Google Scholar
  13. Gilbert MC (1967) X-ray properties of jadeite-acmite pyroxenes. Carnegie Inst Washington Yearb 66:374–376Google Scholar
  14. Goldsmith JR, Jenkins DM (1985) The high-low albite relations revealed by reversal of degree of order at high pressure. Am Mineral 70:911–923Google Scholar
  15. Hays JF, Bell PM (1973) Albite-jadeite-quartz equilibrium: a hydrostatic determination. Carnegie Inst Washington Yearb 72:706–708Google Scholar
  16. Holland TJB (1980) The reaction albite = jadeite + quartz determined experimentally in the range 600–1200° C. Am Mineral 65:129–134Google Scholar
  17. Holland TJB (1983) The experimental determination of activities in disordered and short-range ordered jadeitic pyroxenes. Contrib Mineral Petrol 82:214–220Google Scholar
  18. Johannes W, Bell PM, Boettcher AL, Chipman DW, Hays JF, Mao HK, Newton RC, Seifert C (1971) An inter-laboratory comparison of piston-cylinder pressure calibration using albite-breakdown reaction. Contrib Mineral Petrol 32:24–38Google Scholar
  19. Kushiro I (1969) Clinopyroxene solid solutions formed by reactions between diopside and plagioclase at high pressures. Mineral Soc Am Spec Pap 2:179–191Google Scholar
  20. Manning CE (1994) Rapid-quench hydrothermal experiments at mantle pressures and temperatures. Am Mincral 79:1153–1158Google Scholar
  21. Newton RC and Smith JV (1967) Investigations concerning the breakdown of albite in the earth. J Geol 75:268–286Google Scholar
  22. Newton RC, Charlu TV, Kleppa OJ (1977) Thermochemistry of high pressure garnets and clinopyroxenes in the system CaO−MgO−Al2O3−SiO2. Geochim Cosmochim Acta 41:369–377Google Scholar
  23. Popp RK, Gillbert MC (1972) Stability of acmite-jadeite pyroxenes at low pressure. Am Mineral 51:1210–1231Google Scholar
  24. Salje I, Kuscholke B, Wruck B, Kroll H (1985) Thermodynamics of sodium feldspar I: experimental results and numerical calculations. Phys Chem Mineral 12:99–107Google Scholar
  25. Wood BJ (1979) Activity-composition relationships in Ca(Mg, Fe) Si2O6−CaAl2SiO6 clinopyroxene solid solutions. Am J Sci 279:854–875Google Scholar
  26. Wood BJ, Holland TJB, Newton RC, Kleppa OJ (1980) Thermochemistry of jadeite-diopside pyroxenes. Geochim Cosmochim Acta 44:1363–1371Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Jun Liu
    • 1
  • Steven R. Bohlen
    • 2
  1. 1.Department of Geological and Environmental SciencesStanford UniversityStanfordUSA
  2. 2.U.S. Geological SurveyMenlo ParkUSA

Personalised recommendations