Oxygen isotopic studies of silicate minerals with special reference to hydrothermal mineral deposits

Rapid growth of mineral deposits at artificial seafloor hydrothermal vents

Seafloor massive sulphide deposits are potential resources for base and precious metals (Cu-Pb-Zn ± Ag ± Au), but difficulties in estimating precise reserves and assessing environmental impacts hinder exploration and commercial mining. Here, we report petrological and geochemical properties of sulphide chimneys less than 2 years old that formed where scientific boreholes vented hydrothermal flu...

Thermodynamic Model for Predicting Interactions of Geothermal Brines with Hydrothermal Aluminum Silicate Minerals

We report our continued progress on the development of a thermochemical model of aluminum silicate mineral solubilities in aqueous solutions containing H, Na, K, Al, Cl, Si(OH)4, SiO(OH)3 , OH, Al(OH), Al(OH)2 , Al(OH)3 , Al(OH)4 − as a function of pH to high salt concentrations (I ≤ 5 m). Prior conference proceedings outlined our progress in developing an accurate model for the potassium free ...

‏‎a comparative study of language learning strategies employmed by bilinguals and monolinguals with reference to attitudes and motivation‎‏

هدف از این تحقیق بررسی برخی عوامل ادراکی واحساسی یعنی استفاده از شیوه های یادگیری زبان ، انگیزه ها ونگرش نسبت به زبان انگلیسی در رابطه با زمینه زبانی زبان آموزان می باشد. هدف بررسی این نکته بود که آیا اختلافی چشمگیر میان زبان آموزان دو زبانه و تک زبانه در میزان استفاده از شیوه های یادگیری زبان ، انگیزه ها نگرش و سطح مهارت زبانی وجود دارد. همچنین سعی شد تا بهترین و موثرترین عوامل پیش بینی کننده ...

Distribution and Origin of Clay Minerals During Hydrothermal Alteration of Ore Deposits

Mineral Deposits.

Rising economic value of a large number of metals as a result of their importance for new technologies and industrial development has renewed worldwide interest for mineral exploration and detailed studies of ore deposits. The Dill’s (2010) “chessboard” classification of mineral deposits is the most recent attempt to provide an exhaustive overview of all mineral deposits known to date. However,...