Overpressures induced by coesite-quartz transition in zircon
-
Kai Ye
,
Jing-Bo Liou
Absrtract
More than 120 coesite and few polycrystalline quartz (coesite pseudomorph) inclusions were identified by Raman microspectroscopy in zircons of various kinds from gneissic rocks located in the Dabieshan and Sulu ultrahigh-pressure (UHP) metamorphic terranes in eastern China. The coesite inclusions have undergone, to various degrees, the coesite-quartz transition. Raman spectra of coesite and subsidiary quartz inclusions show various shifts, which are closely correlated to the extent of the transition. The coesite-pseudomorph inclusions in zircon show the highest Raman shift. Calibrations based on the experimental work of Hemley (1987) yielded inconsistent present-day overpressures (0-24 kbar) in coesite inclusions inside zircons. The availability of fluids, which resulted in the pervasive regional retrogression of the UHP gneisses during later exhumation stages, is regarded as the main factor controlling the extent of the coesite-quartz transition. This study underscores the need for the elastic model applied by previous researchers to explain the preservation of the coesite inclusions in rigid host minerals.
© 2015 by Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Recalibration of the GASP geobarometer in light of recent garnet and plagioclase activity models and versions of the garnet-biotite geothermometer
- Compositional zoning and element partitioning in nickeloan tourmaline from a metamorphosed karstbauxite from Samos, Greece
- Occurrence of apatite associated with magnetite in an ophiolite complex (Othrys), Greece
- Overpressures induced by coesite-quartz transition in zircon
- Geochemical modeling of bacterially induced mineralization of schwertmannite and jarosite in sulfuric acid spring water
- H2O-D2O exchange in lawsonite
- Composition and temperature dependence of cation ordering in Ni-Mg olivine solid solutions: a time-of-flight neutron powder diffraction and EXAFS study
- Thermal conductivity of spinels and olivines from vibrational spectroscopy: Ambient conditions
- Elasticity of six polycrystalline silicate garnets at pressure up to 3.0 GPa
- The crystal chemistry of birefringent natural uvarovites: Part I. Optical investigations and UV-VIS-IR absorption spectroscopy
- The crystal chemistry of birefringent natural uvarovites: Part II. Single-crystal X-ray structures
- Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy study
- Crystal structure of a new (21)-clinopyribole synthesized at high temperature and pressure
- The Mg(Fe)SiO3 orthoenstatite-clinoenstatite transitions at high pressures and temperatures determined by Raman-spectroscopy on quenched samples
- Raman spectroscopic studies of phase E to 19 GPa
- The crystal structures of the low-temperature phases of leonite-type compounds, K2Me(SO4)2·4H2O (Me2+ = Mg, Mn, Fe)
- Carraraite and zaccagnaite, two new minerals from the Carrara marble quarries: their chemical compositions, physical properties, and structural features
- Pristine surface growth features on 100 Ma garnet phenocrysts: Interference imaging results
- Oxygen triclusters in crystalline CaAl4O7 (grossite) and in calcium aluminosilicate glasses: 17O NMR
- Low-temperature heat capacity of pentlandite
- Calcium segregation at antiphase boundaries in pigeonite
Artikel in diesem Heft
- Recalibration of the GASP geobarometer in light of recent garnet and plagioclase activity models and versions of the garnet-biotite geothermometer
- Compositional zoning and element partitioning in nickeloan tourmaline from a metamorphosed karstbauxite from Samos, Greece
- Occurrence of apatite associated with magnetite in an ophiolite complex (Othrys), Greece
- Overpressures induced by coesite-quartz transition in zircon
- Geochemical modeling of bacterially induced mineralization of schwertmannite and jarosite in sulfuric acid spring water
- H2O-D2O exchange in lawsonite
- Composition and temperature dependence of cation ordering in Ni-Mg olivine solid solutions: a time-of-flight neutron powder diffraction and EXAFS study
- Thermal conductivity of spinels and olivines from vibrational spectroscopy: Ambient conditions
- Elasticity of six polycrystalline silicate garnets at pressure up to 3.0 GPa
- The crystal chemistry of birefringent natural uvarovites: Part I. Optical investigations and UV-VIS-IR absorption spectroscopy
- The crystal chemistry of birefringent natural uvarovites: Part II. Single-crystal X-ray structures
- Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy study
- Crystal structure of a new (21)-clinopyribole synthesized at high temperature and pressure
- The Mg(Fe)SiO3 orthoenstatite-clinoenstatite transitions at high pressures and temperatures determined by Raman-spectroscopy on quenched samples
- Raman spectroscopic studies of phase E to 19 GPa
- The crystal structures of the low-temperature phases of leonite-type compounds, K2Me(SO4)2·4H2O (Me2+ = Mg, Mn, Fe)
- Carraraite and zaccagnaite, two new minerals from the Carrara marble quarries: their chemical compositions, physical properties, and structural features
- Pristine surface growth features on 100 Ma garnet phenocrysts: Interference imaging results
- Oxygen triclusters in crystalline CaAl4O7 (grossite) and in calcium aluminosilicate glasses: 17O NMR
- Low-temperature heat capacity of pentlandite
- Calcium segregation at antiphase boundaries in pigeonite
