نوع مقاله : مقاله پژوهشی
نویسنده
دانشیار، گروه معدن، دانشگاه بین‌المللی امام خمینی(ره)، قزوین، ایران
چکیده
در این مطالعه نانوفسیل‌های آهکی سازند گورپی در برش کلچنار در شمال باختر ایذه بررسی شده است. در این برش سازند گورپی از مارن، مارن شیلی و سنگ‌آهک مارنی تشکیل شده است. به منظور معرفی گونه های شاخص، تجمعات فسیلی همراه و زیست زون ها، 150 نمونه اسلاید از سازند گورپی مطالعه شد که در نتیجه به تشخیص12 زیست زون انجامید. در این مطالعه 61 گونه و 35 جنس از نانوفسیل های آهکی شناسایی شد. بر پایه زیست زون های به دست آمده، بازه زمانی سازند گورپی در برش مورد مطالعه از اواخر کامپانین (late Campanian) تا پالئوسن پسین (Late Selandian) و مرز کرتاسه- پالئوژن پیوسته پیشنهاد می شود. این بازه با زیست زون های CC21-CC26 از زون‌بندی
(Sissingh (1977 و زون‌های NP1-NP6 از زون بندی (Martini (1971 همخوانی دارد.
کلیدواژه‌ها
موضوعات
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