نوع مقاله: مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، پژوهشکده علوم زمین، سازمان زمینشناسی و اکتشافات معدنی کشور، تهران، ایران
2 Professor, Department of Geology, Faculty of Science, Tehran University, Tehran, Iran
3 استادیار، پژوهشکده علوم زمین، سازمان زمینشناسی و اکتشافات معدنی کشور، تهران، ایران
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
The Sanganeh Formation is one of the Early Cretaceous rock units in the Koppeh- Dagh basin. This formation in the Dahaneh Gholaman section (in north of Bojnord city) with a thickness of 900 meters (consist of marl, shale and limestone) is laying conformably on the Sarcheshmeh Formation and covered by Atamir Formation. In this study, biostratigraphic investigations on 50 palynological samples from the Sanganeh Formation led to recognition of 21 genera and 31 species of dinoflagellate cysts indicating an age of Late Aptian-Albian belonging to Odontochitina operculata zone. Also palynofacies studies revealed two types of palynofacies (II and IV). Palynofacies studies show dominance of palynofacies II through the stratigraphic column indicating a marginal dysoxic-anoxic basin. On the other hand, presence of palynofacies IV in some parts along the stratigraphic column reflects increase in the depth of the marine environment from time to time.
کلیدواژه‌ها [English]
آقانباتی، ع.، 1383- زمینشناسی ایران، انتشارات زمینشناسی و اکتشافات معدنی کشور، تهران، 586 ص.
افشارحرب، ع.، 1373- زمینشناسی ایران، زمینشناسی کپه داغ، انتشارات زمینشناسی کشور، تهران، شماره 11، 276 ص.
ترجانی صالحانی، م.، 1393- پالینواستراتیگرافی، پالینوفاسیس و پالئواکولوژی سازند سنگانه در چاه توس1، کپهداغ، پایاننامه کارشناسی ارشد، دانشگاه تهران، دانشکده زمینشناسی.
خسروی، ر.، 1386- پالینواستراتیگرافی سازند سنگانه در برش قلعهنو، شرق کپهداغ، پایاننامه کارشناسی ارشد، دانشگاه تهران، دانشکده زمینشناسی.
علامه، م.، آریانی، ع.، وزیری، م. و مرادیان، ف.، 1387- بررسی تغییرات نسبی اکسیژن و نرخ رسوبگذاری سازند سنگانه براساس مطالعات پالینولوژیکی، چهارمین همایش زمینشناسی و محیط زیست، اسلامشهر، دانشگاه آزاد اسلامی واحد اسلامشهر.
مؤسسه گیتاشناسی، 1395- اطلس راههای ایران، انتشارات گیتاشناسی، واحد پژوهش، 311 ص.
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