Refinement of geothermobarometry for cordierite granulites

An Excel-based tool for evaluating and visualizing geothermobarometry data

• Many geothermobarometers are based on exchange of chemical components between two phases at equilibrium. Problems: • For rare phases, touching grains may be difficult to find. • Zoning along a mutual grain boundary or exsolution makes unambiguous identification of equilibrium analysis pairs difficult. The Dilemma: A. Rely on very few measurements where petrographic interpretation gives high l...

Metamorphism of basement rocks in the Central Zone of the North China Craton: implications for Paleoproterozoic tectonic evolution

Lithological, structural, metamorphic and geochronological data for the North China Craton enable its division into the Western and Eastern Blocks of Archean to Paleoproterozoic age separated by a north–south trending Paleoproterozoic orogenic belt: the Central Zone. The Central Zone is divisible into a series of lowto medium-grade granite–greenstone belts and high-grade metamorphic terrains co...

Structural investigations of the two polymorphs of synthetic Fe-cordierite and Raman spectroscopy of hexagonal Fe-cordierite.

The crystal structures of synthetic hexagonal and orthorhombic Fe-cordierite polymorphs with the space groups P6/mcc and Cccm were refined from single-crystal X-ray diffraction data to R1, hex = 3.14 % and R1, ortho = 4.48 %. The substitution of the larger Fe2+ for Mg leads to multiple structural changes and an increase of the unit cell volumes, with a, c (hex) = 9.8801(16) Å, 9.2852(5) Å and a...

Cordierite Granite from Terip Terip, Victoria

Improvement of Nanosized CuO-Fe2O3/cordierite System by Li2O-treatment for wastewater treatment

A mixture of 10 wt% CuO-10 wt% Fe2O3 supported on cordierite were prepared by wet impregnation. The as-prepared solids doped with Li2O (0.75-3 mol %) were calcined at 500-900 ºC. The crystalline phase, morphology, and surface area were investigated by XRD, HR-TEM and N2-adsoprtion-desorption. Moreover, their photocatalytic activities of samples calcined at 700°C on the degradation of phenol wer...