نشریه علوم زمین خوارزمی

نشریه علوم زمین خوارزمی

بررسی برگشتگی زمین‌ساختی و ارتباط ساختاری تاقدیس های نفتی رگ سفید و زاغه با استفاده از داده های لرزه نگاری بازتابی(پیش بوم زاگرس)

نویسندگان
دانشگاه بیرجند، گروه زمین‌شناسی
چکیده
راندگی رگ سفید از سری گسل­های پی سنگی کششی اولیه است که طی بازشدگی اقیانوس نئوتتیس در پرمین-تریاس با امتداد شمال باختر-جنوب خاور ایجاد شده ­است. چینه­های رشدی کج شده در سازند آغاجری نشان می­دهند که فاز نهایی چین‌خوردگی­ وابسته به برگشتگی این گسل در پلیوسن، منجر به برخاستگی تاقدیس رگ سفید شده است. نرخ برگشتگی زمین‌ساختی محاسبه شده روی مقطع لرزه­نگاری بازتابی عمود بر گسل رگ سفید (75/0(Ri=، مقادیر زیادی برگشتگی در راستای این گسل را نشان می­دهد. با توجه به مقدار زیاد نرخ برگشتگی، شیب زیاد گسل برگشته رگ سفید، هندسه ظاهری و تاریخچۀ تکاملی در پیش بوم زاگرس، راندگی کوچک با عمق جدایشی کم‌تر در یال جنوبی تاقدیس زاغه را می­توان به‌عنوان راندگی میان بر فرودیواره و شاخه­ای از راندگی بزرگ رگ سفید در نظر گرفت که به‌دلیل انتقال دگرریختی در فرودیواره گسل رگ سفید توسعه پیدا کرده است.
کلیدواژه‌ها

عنوان مقاله English

Tectonic Inversion and Structural Relation of Rag Sefid and Zaghe Oil Anticlines using Seismic Reflection ِData (Zagros Foreland)

نویسندگان English

mehdi yousefi
Seyed Morteza Moussavi
Mohammad Mehdi khatib
University of Birjand
چکیده English

The northwest-southeast Rag Sefid thrust is a series of the tensile faults formed during the opening of the Neo-Tethys Ocean in the Permian Triassic. Tilted growth strata show the final phase of the inversion-related folding of this fault in the Pliocene which has led to the rise of Rag Sefid anticline. The tectonic inversion rate calculated on the seismic reflection sections of Rag sefid fault (Ri = 0.75) shows the high inversion values along the fault. Considering the high rate of inversion, high angle Rag Sefid inverted fault dip, apparent geometry and evolutionary history in the Zagros foreland, the small thrust fault with a lower separation depth in the southern limb of the Zahge anticline can be considered as a shortcut thrust and also a branch of Rag sefid thrust that has developed for the deformation transfer in the footwall of the Rag Sefid fault.

کلیدواژه‌ها English

Tectonic inversion
Seismic Section
Rag Sefid fault
Zahge anticline
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