نشانه‌های فعالیتهای هیدروترمالی و پنوماتولیتی وسیع در شمال استان همدان

Indications Of Extensive Hydrotermalic And Pneumatolytic Activities In The North Of Hamedan Province.

Some suitable or unsuitable phenomena such as gaseous well,crrosion of wells’equipments,constitution of metalic mines,occurrence of Sinkholes and reduce of yield for some crops have been occurred in the north of Hammedan province,that reasoning of them have been attended by researchers. In this study, all of gaseous wells in the north of province were recognized and water temprature of them measured.Then,۱۶ water samples of wells were taken and analized in the laboratory.also,۱۲ polished section and ۳۸ thin section of Hamekasi mine and around of it were prepared.Acording to study of microscopic sections and analytic of Data,It was distinguished that there is considerable difference between temprature of gaseous wells.In additional, free carbon dioxide of wells’ water is more than ۱۰۰ mg/li that it indicates to pneumatolytic internal activities in this area. Existence of index minerals such as spherolitic scorlite, pestacite, scapolite, perhenite and so on comments and emphases these activities.

Keywords: hydrothermal,pneumatolite,gaseouswells,mine,carbon dioxide,Hamedan.