کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5786292 | 1640479 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strain localization and evolving kinematic efficiency of initiating strike-slip faults within wet kaolin experiments
ترجمه فارسی عنوان
محلی سازی فشار و تکامل کارایی سینماتیک آغاز گسل های لغزش اعتصاب در آزمایش های مرطوب کائولین
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کلمات کلیدی
کارایی کینماتیک، شروع اعتصاب، محلی سازی فشار، مدل سازی آنالوگ، تکامل منطقه برش، تغییر شکل غیر خطی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
Using wet kaolin experiments, we document the evolution of strain localization during strike-slip fault maturation under variable boundary conditions (pre-existing fault, depth of and distribution of basal shear). While the nature of the basal shear influences strain localization observed at the clay surface, similarities between experiments reveal a general conceptual model of strain accommodation. First, shear strain is accommodated as distributed shear (Stage 0), then by development of echelon faults (Stage I), then by interaction, lengthening and propagation of those echelon faults (Stage II) and, finally, by slip along through-going fault (Stage III). Stage II serves as a transitory period when the system reorganizes after sufficient strain localization. Here, active fault system complexity is maximized as faults link producing apparent rotation of active fault surfaces without material rotation. As the shear zone narrows, off-fault deformation decreases while fault slip and kinematic efficiency increases. We quantify kinematic efficiency as the ratio of fault slip to applied displacement. All fault systems reach a steady-state efficiency in excess of 80%. Despite reducing off-fault deformation, the through-going fault maintains <1.5Â cm structural irregularities (i.e., stepovers), which suggests that small (<3Â km) stepovers may persist along mature, efficient faults in the crust.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 101, August 2017, Pages 96-108
Journal: Journal of Structural Geology - Volume 101, August 2017, Pages 96-108
نویسندگان
Alexandra E. Hatem, Michele L. Cooke, Kevin Toeneboehn,