تحلیل هندسی تاقدیس بورخ، جنوب خاور کمربند چین¬خورده-رانده زاگرس
الموضوعات :
رمضان رمضانی اومالی
1
( دانشگاه صنعتی شاهرود)
ناصر حافظی مقدس
2
(دانشگاه فردوسی مشهد)
احمد نوحه¬گر
3
( دانشگاه تهران، تهران، ایران)
عبدالوهاب افروغ
4
( دانشگاه صنعتی شاهرود، شاهرود، ایران)
الکلمات المفتاحية: بستگي قائم و افقي تاقديس بورخ تحليل هندسي كمربند چين¬, خورده ـ رانده زاگرس گروه دهرم,
ملخص المقالة :
تاقدیس بورخ با روند WNW-ESE در جنوب شرق کمربند چین خورده-رانده زاگرس و در 40 کیلومتری شمال شهرستان بستک در ناحیه ساختاری فارس قرار دارد. در این مقاله براساس داده-های میدانی، تصاویر ماهوار ه ای و هفت برش ساختاری رسم شده عمود بر تاقدیس بورخ به بررسی هندسه آن پرداخته شده است. با توجه به وجود سازند هرمز به‌عنوان یک افق جدایش موثر در قاعده پوشش رسوبی و بر روی پی سنگ، و تطابق پارامترهای هندسی محاسبه شده از برش های ساختاری آن با نمودارهای هندسی چین های جدایشی، تاقدیس بورخ به‌صورت یک چین جدایشی، خمشی، نامتقارن و غیر هارمونیک می باشد. همچنین برای تعیین سبک یا هندسه از نظر فشردگی، واژه باز پیشنهاد می گردد. بازدید میدانی و برش های عرضی ساختاری ترسیم شده نشان می دهد که سازند دشتک به‌عنوان یک واحد جدایش میانی باعث تشکیل چین های فرعی در منطقه مورد مطالعه شده است. نقشه خطوط هم تراز زیرزمینی راس گروه دهرم در تاقدیس بورخ، میزان بستگی قائم تاقدیس را در حدود 1000 متر و میزان بستگی افقی آن را در حدود 200 کیلومتر مربع نشان می دهد.
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