The aim of this study is separation of Fe2O3, TiO2 and V2O5 anomalies in Esfordi 1:100,000 sheet which is located in Bafq district, Central Iran. The analyzed elements of stream sediment samples taken in the area can be classified into 5 groups (factors) by factor analysis. The Concentration–Number (C-N) fractal model was used for delineation of the Fe2O3, TiO2 and V2O5 thresholds. According to...

Viscosity of hydrous silicate melts is essential in modeling the dynamics of magma transport and volcanic eruptions. Numerous experimental measurements of viscosity, as well as viscosity models, have been published. For general melt compositions, the classic models of either Bottinga and Weill (1972) or Shaw (1972) are still used, not because they are reliable, but because of the extreme diffic...

The hydrous species geospeedometer is based on the homogeneous interconversion reaction between molecular H2O species and OH species in silicate melts and glasses. Here we report new data for the calibration of the geospeedometer in rhyolitic glass, extending the coverage of quench rate to 94 K/s and of H2Ot to 7.7 wt.% by using a piston-cylinder apparatus at low pressures (200–500 MPa) to prev...

Introduction: Recent remote-sensing observations have demonstrated surface-correlated OH/H2O on the regolith of the Moon from highto mid-latitudes [1-3]. The estimated abundances of lunar surface water from the reflectance spectra ranged from 10-5000 ppm [1-3]. Three sources have been suggested: solarwind origin; volatile retention from meteoritic impact; and degassing of indigenous water [1-4]...

Early Cambrian volcanic rocks of the Posht-e Badam tectonic block in Central Iran which is hydrothermally altered to green color rocks, hosts the Kiruna-type Iron Oxide-Apatite (IOA) mineralization in Anomaly 10 of Sechahun deposit. Geochemically, these volcanic rocks are classified as high-potassium calc-alkaline and mainly consist of rhyolite and trachyandesite. These rocks are important for ...