نوع مقاله : مقاله پژوهشی
نویسندگان
1 1- دانشیار گروه زمین شناسی دانشگاه بوعلی سینا، همدان
2 عضو هیات علمی دانشگاه پیام نور اسدآباد، همدان
3 دانشجوی دکتری زمین‌شناسی مهندسی دانشگاه بوعلی سینا، همدان
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this study effective factors in generation of Alisadr and Katalekhor caves have been compared with considering of geology condition, surface and subsurface karstic features, petrographical studies and determination of physical properties of rocks in the sites. From geotectonic point of view Alisadr cave is located in the sanandaj – sirjan zone and the katalekhor cave is located in the central Iran zone. Alisadr and Katalekhor caves are generated in Jurassic limestone and Qom formation (Oligo- miocene) limestone, respectively. According to site investigation results, in the Alisadr cave subsurface karst is developed but surface karstic features were rare and limited to afew small springs. In Katalekhor cave area both surface and subsurface karst developed. Spring with small discharge potential in Alisadr area indicated that karstic aquifers are not developed which is in accordance with scarcity of surface karstic features. Spring in the Katalekhor area have high discharge potential in respect to the Alisadr area springs that can be illustrate as a development of karstic aquifers in this regions. According to thin section studies results, Alisadr limestone mainly composed of crystallized calcite and Katalekhor limestone is a biocalcite Wackestone limestone samples tests results indicated that the Katalekhor limestone samples have porosity and water absorption percent higher than the Alisadr limestone. According to this research results, the Alisadr cave is hipogenetic that resulted from hydrothermal solutions activation, while Katalekhor cave is epigenic and generated as a result of penetration water activation.
کلیدواژه‌ها [English]
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