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Chemical fine structure of Franciscan jadeitic pyroxene from Ward Creek, Cazadero area, California

  • Shohei Banno EMAIL logo , Hidehiko Shibakusa , Masaki Enami , Chang-Lung Wang and W.G. Ernst
Published/Copyright: March 25, 2015
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American Mineralogist
From the journal American Mineralogist Volume 85 Issue 11-12

Abstract

Jadeitic pyroxenes in two Franciscan samples, one, a possible segregation vein in metabasite, and another, a metabasite, both from Ward Creek, Cazadero area, western California, were examined with the electron microprobe. The samples were collected from the area of Type III rocks, the highestgrade portion of the pumpellyite zone. Jadeitic pyroxenes from both samples are very heterogeneous and cannot be ascribed to crystallization under conditions of surface equilibrium with the coexisting phases. Two possibilities for their origin are suggested: one is as tectonic blocks, and the other as the highest-grade rocks from the zone that crystallized close to or within the P-T stability field of pure jadeite + quartz

Received: 2000-2-2
Accepted: 2000-7-8
Published Online: 2015-3-25
Published in Print: 2000-11-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Patterns of mineral occurrence in metamorphic rocks
  2. A double magmatic heat pump at the core-mantle boundary
  3. High-temperature contact metamorphism of calc-silicate xenoliths in the Kiglapait Intrusion, Labrador
  4. Multiple pyroxene and amphibole assemblages in the amphibolite facies: Bulk compositional controls
  5. Margarite-corundum phyllites from the Appalachian orogen of South Carolina: Mineralogy and metamorphic history
  6. Continuous metamorphic gradient documented by graphitization and K-Ar age, southeast Otago, New Zealand
  7. Kyanite eclogite thermobarometry and evidence for thrusting of UHP over HP metamorphic rocks, Nordøyane, Western Gneiss Region, Norway
  8. Monazite geochronology of UHP and HP metamorphism, deformation, and exhumation, Nordøyane, Western Gneiss Region, Norway
  9. Solubilities of noble metals in Fe-containing silicate melts as derived from experiments in Fe-free systems
  10. Water speciation in silicate glasses and melts: Langmuir limited site model
  11. The ab initio study of the stability of low temperature Al/Si ordered albite, NaAlSi3O8
  12. The heat capacity of MgCr2O4, FeCr2O4, and Cr2O3 at low temperatures and derived thermodynamic properties
  13. Thermodynamics of the R3̅ to R3̅c phase transition in the ilmenite-hematite solid solution
  14. An ab initio study of hydrogarnets
  15. Short-range order in synthetic aluminous tremolites: An infrared and triple-quantum MAS NMR study
  16. In-situ Raman spectroscopy of quartz: A pressure sensor for hydrothermal diamond-anvil cell experiments at elevated temperatures
  17. Modification of the hydroxyl surface of potassium acetate intercalated halloysite between 25 and 300 °C
  18. On the occurrence of anomalous fission tracks in apatite and titanite
  19. Reactivity of surface sites on fractured arsenopyrite (FeAsS) toward oxygen
  20. Surface area and porosity of primary silicate minerals
  21. Charge contrast imaging of geological materials in the environmental scanning electron microscope
  22. Chemical fine structure of Franciscan jadeitic pyroxene from Ward Creek, Cazadero area, California
  23. Crystal structure of CaMg2Al6O12, a new Al-rich high pressure form
  24. The crystal structure of “Tetragonal Almandine-Pyrope Phase” (TAPP): A reexamination
  25. The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite
  26. Elyite, Pb4Cu(SO4)O2(OH)4·H2O: Crystal structure and new data
  27. Dukeite, Bi3+24Cr86+O57(OH)6(H2O)3, a new mineral from Brejaúba, Minas Gerais, Brazil: Description and crystal structure
  28. Pseudosinhalite is a structural isotype of chondrodite
  29. Structure type and bulk modulus of Fe3S, a new iron-sulfur compound
  30. Single crystal elasticity of lawsonite
  31. In situ measurement of viscosity of liquids in the Fe-FeS system at high pressures and temperatures
https://doi.org/10.2138/am-2000-11-1222

Articles in the same Issue

  1. Patterns of mineral occurrence in metamorphic rocks
  2. A double magmatic heat pump at the core-mantle boundary
  3. High-temperature contact metamorphism of calc-silicate xenoliths in the Kiglapait Intrusion, Labrador
  4. Multiple pyroxene and amphibole assemblages in the amphibolite facies: Bulk compositional controls
  5. Margarite-corundum phyllites from the Appalachian orogen of South Carolina: Mineralogy and metamorphic history
  6. Continuous metamorphic gradient documented by graphitization and K-Ar age, southeast Otago, New Zealand
  7. Kyanite eclogite thermobarometry and evidence for thrusting of UHP over HP metamorphic rocks, Nordøyane, Western Gneiss Region, Norway
  8. Monazite geochronology of UHP and HP metamorphism, deformation, and exhumation, Nordøyane, Western Gneiss Region, Norway
  9. Solubilities of noble metals in Fe-containing silicate melts as derived from experiments in Fe-free systems
  10. Water speciation in silicate glasses and melts: Langmuir limited site model
  11. The ab initio study of the stability of low temperature Al/Si ordered albite, NaAlSi3O8
  12. The heat capacity of MgCr2O4, FeCr2O4, and Cr2O3 at low temperatures and derived thermodynamic properties
  13. Thermodynamics of the R3̅ to R3̅c phase transition in the ilmenite-hematite solid solution
  14. An ab initio study of hydrogarnets
  15. Short-range order in synthetic aluminous tremolites: An infrared and triple-quantum MAS NMR study
  16. In-situ Raman spectroscopy of quartz: A pressure sensor for hydrothermal diamond-anvil cell experiments at elevated temperatures
  17. Modification of the hydroxyl surface of potassium acetate intercalated halloysite between 25 and 300 °C
  18. On the occurrence of anomalous fission tracks in apatite and titanite
  19. Reactivity of surface sites on fractured arsenopyrite (FeAsS) toward oxygen
  20. Surface area and porosity of primary silicate minerals
  21. Charge contrast imaging of geological materials in the environmental scanning electron microscope
  22. Chemical fine structure of Franciscan jadeitic pyroxene from Ward Creek, Cazadero area, California
  23. Crystal structure of CaMg2Al6O12, a new Al-rich high pressure form
  24. The crystal structure of “Tetragonal Almandine-Pyrope Phase” (TAPP): A reexamination
  25. The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite
  26. Elyite, Pb4Cu(SO4)O2(OH)4·H2O: Crystal structure and new data
  27. Dukeite, Bi3+24Cr86+O57(OH)6(H2O)3, a new mineral from Brejaúba, Minas Gerais, Brazil: Description and crystal structure
  28. Pseudosinhalite is a structural isotype of chondrodite
  29. Structure type and bulk modulus of Fe3S, a new iron-sulfur compound
  30. Single crystal elasticity of lawsonite
  31. In situ measurement of viscosity of liquids in the Fe-FeS system at high pressures and temperatures
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