تحلیل هندسی و ساز و کار چین خوردگی در شمال خاوری فروبار دزفول

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه علوم زمین دانشگاه بیرجند

2 استادیار دانشگاه بیرجند

3 استاد بخش علوم زمین دانشگاه بیرجند

4 گروه زمین شناسی دانشگاه تحصیلات تکمیلی زنجان

5 گروه دینامیک لیتوسفر انستیتو علوم زمین جاومه المرا بارسلون اسپانیا

10.22071/gsj.2017.93015.1200

چکیده

چکیده
تعیین هندسه و ساز و کار چین خوردگی در فرو افتادگی دزفول به دلیل دربرگرفتن بخش عمده ذخایر هیدروکربنی ایران و همچنین جایگاه این حوضه در روند تکامل ساختاری کمربند چین - رانده زاگرس، از اهمیت حیاتی برخوردار است. در این پژوهش، چگونگی تکامل هندسی تاقدیس جریک واقع در شمال خاوری فروافتادگی دزفول، بر اساس اطلاعات ژئوفیزیکی حاصل از لرزه نگاری سه بعدی، داده های حفاری چاه که توسط شرکت ملی نفت ایران تهیه و در اختیار قرارگرفته است، تفسیر تصاویر ماهواره ای و داده‌های حاصل از برداشت های صحرایی مورد بررسی قرار گرفته است. بر اساس برش های ساختاری رسم شده، تغییرات هندسی چین در عرض و در راستای امتداد تاقدیس مورد مطالعه قرار گرفته است. تبخیری‌های سازند گچساران به عنوان افق جدایش بالایی، سبب تغییرات هندسی و سبک دگرریختی در امتداد محور تاقدیس شده است. در منطقه دماغه تاقدیس، ساز و کار جدایشی با هندسه متقارن و مدور در سطح دیده می شود و بخش میانی تاقدیس، سازوکار چین خوردگی جدایشی گسلیده (Faulted detachment fold) را نشان می دهد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Geometric analysis and folding mechanism

نویسندگان [English]

  • ahmad lashgari 1
  • magmodreza Hayhat 2
  • mohammd mahdi khatib 3
  • Mahdi Najafi 4
  • Jaume Verges 5
1 دانشجوی دکتری
2 - Associate Professor Department of Earth Sciences, Birjand University
3 - Professor, Department of Earth Sciences, Birjand University, Birjand
4 هیات علمی
5 Institute of Earth Sciences Jaume Almera (ICTJA), CSIC Barcelona, Spain
چکیده [English]

Determining the geometry and folding mechanism in Dezful embayment in the southwest of Iran due to the inclusion of a large amount of Iran's hydrocarbon reserves, also its role in the process of structural evolution of Zagros fold- belt, is important. In present study, structural evolution of Jarik anticline in the northwest of Dezful embayment have been studied based on 3D seismic data, drilling data that has been provided National Iranian Oil Company remote sensing, and the field observations. According to the provided structural cross sections, geometric variations of Jarik anticline across and along the anticline axis, has been investigated. Gachsaran formation as an upper detachment horizon, causes geometric and structural changes along the anticline axis. It seems that, in the nose of anticline, occurred the detachment folding mechanism associated with concentric geometry. And in the middle section of the anticline,that folding process is more advanced, faulted detachment folding mechanism has acted.

کلیدواژه‌ها [English]

  • Zagros fold-thrust belt
  • Dezful embayment
  • Jarik anticline
  • Gachsaran formation
  • Faulted detachment folding

کتابنگاری

خرازی‎زاده، ن.، الماسیان، م. و شرکتی، ش.، 1391-  تحلیل جنبشی هندسه چین‎خوردگی در تاقدیس آغاجاری (فروافتادگی دزفول)، ایران، فصلنامه علوم زمین، شماره 86، صص. 261 تا 272.

مطیعی، ه.، 1372- چینه‎شناسی زاگرس، انتشارات سازمان سازمان زمین‎شناسی و اکتشافات معدنی کشور.

 

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