نشریه علوم زمین خوارزمی

نشریه علوم زمین خوارزمی

محیط رسوبی، دیاژنز، چینه نگاری سکانسی و ژئوشیمی واحد کربناته کرتاسه زیرین (K) کوه خان گرمز در تویسرکان (زون سنندج-سیرجان)

نویسندگان
دانشگاه شهید بهشتی، گروه حوضه های رسوبی و نفت
چکیده
چکیده

واحدهای کربناته زیرین کرتاسه زیرین کوه خان گرمز در غرب تویسرکان (جنوب استان همدان) به ضخامت 119 متر بر روی رسوبات آهکی ژوراسیک با ناپیوستگی فرسایشی واقع شده­اند. این واحدهای آهکی جهت مطالعات رسوب­شناسی و چینه­شناسی انتخاب شده­اند. با توجه به شواهد صحرایی و روند تغییر رخساره­ها محیط رسوبی رمپ هم­شیب با کمربند­های رخساره­ای لاگون، سد و دریای باز در زمان تشکیل این رسوبات می­باشد. مطالعات چینه­نگاری سکانسی منجر به شناسایی 3 سکانس رسوبی رده 3 در این رسوبات شد. بر اساس شواهد صحرایی و پتروگرافی فرآیندهای سیمانی شدن، انحلال، میکریتی شدن، شکستگی،کارستی شدن و دولومیتی شدن از مهم­ترین رخداد­های دیاژنزی مورد مطالعه در این رسوبات می­باشند. مطالعات ژئوشیمی 40 نمونه از این واحد های آهکی نشان دهنده کانی شناسی اولیه آراگونیتی و سیستم دیاژنزی بسته تا نیمه بسته می­باشد.



کلیدواژه‌ها

عنوان مقاله English

Depositional environment, diagenesis, sequence stratigraphy and geochemistry of Lower Cretaceous carbonate unit (K1) of Kuh-khangormas, Tuyserkan (Sanandaj-Sirjan Zone)

نویسندگان English

Farzaneh sharifitaeme
mohammad hossein adabi
mohsen liaghat
Shahid Beheshti Universit
چکیده English

Abstract


Lower Cretaceous carbonate units of the Kuhzation, karstification and dolomitization, studies of 40 samples of these carbonate units indicated aragonite as original mineralogy in closed to semi-closed diagenetic system.

کلیدواژه‌ها English

Khangormaz
sedimentary environment
Sequence Stratigraphy
Geochemistry
Lower cretaceous
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