کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9528371 | 1636671 | 2018 | 50 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Basement control on fault formation and deformation band damage zone evolution in the Rio do Peixe Basin, Brazil
ترجمه فارسی عنوان
کنترل زیرزمینی در ایجاد منطقه گسل و تغییر شکل آسیب های منطقه تغییر شکل در حوضه ریو دو پیس، برزیل
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کلمات کلیدی
نوارهای تغییر شکل تکامل ریت، منطقه آسیب دیده، دوباره فعال شدن منطقه برشی، ریو پیزه حوضه،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
The objective of this study is to analyze the influence of brittle reactivations of continental-scale Precambrian ductile shear zones on the evolution of deformation band damage zones. Our results indicate that the Rio do Peixe Basin was formed by the Cretaceous reactivation of its basement EW- and NE-SW-striking major fault segments. These fault segments are composed of a footwall with Precambrian crystalline mylonites and a hanging wall with Cretaceous fine to coarse sandstones. In the hanging wall, deformation bands occur in poorly sorted, fine to very coarse sandstones. These deformation bands occur as single bands or clusters mostly within damage zones ~84â¯m from the basement faults and are widespread in structural highs. Our data plot slightly above the medium fault displacement vs. the damage zone width solution but falls within the point cloud of global patterns. The slip surfaces strike EW and NE-SW and are parallel or slightly oblique to the basement rift faults. The kinematics of slip surfaces are consistent with those of the reactivated basement faults. In addition, a logarithmic decrease in deformation band frequency occurs away from the basement slip surface. The deformation band frequencies peak close to the fault core with values as high as 22-48â¯bands/m. The lithology grain size also influences deformation as clusters of deformation bands and slip surfaces are only observed in coarse sandstones. This new case of deformation bands in damage zones of basement faults is characterized by a strong attitude and geometric and kinematic inheritance but follows the deformation band frequency of global patterns.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 745, 16 October 2018, Pages 117-131
Journal: Tectonophysics - Volume 745, 16 October 2018, Pages 117-131
نویسندگان
Renata E.B. Araujo, Francisco H.R. Bezerra, Francisco C.C. Nogueira, Fabrizio Balsamo, Bruno R.B.M. Carvalho, Jorge A.B. Souza, Julio C.D. Sanglard, David L. de Castro, Alanny C.C. Melo,