کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4734254 1357082 2009 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Geometry, displacement–length scaling, and extensional strain of normal faults on Mars with inferences on mechanical stratigraphy of the Martian crust
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Geometry, displacement–length scaling, and extensional strain of normal faults on Mars with inferences on mechanical stratigraphy of the Martian crust
چکیده انگلیسی

We measure throw distributions for graben-bounding normal faults from two areas on Mars to investigate fault growth, displacement–length (Dmax–L) scaling, and extensional strain using a complementary suite of techniques. Faults in the northern plains are inferred to be restricted at 2–3 km depth, as shown by a transition from linear scaling, with Dmax–L ratios of ∼1 × 10−3, to nonlinear scaling for faults >50 km long. On the Alba Patera volcano, faults conform to linear Dmax–L scaling, with a Dmax–L ratio of ∼6 × 10−3, consistent with more deeply penetrating faults that are not restricted at depth. These grabens accommodate larger extensional strains (∼0.84%) than the faults in the northern plains (∼0.23%), with a temporal change from regionally distributed to localized deformation and associated increases in Dmax–L ratio, extensional strain, and perhaps down-dip fault height. The results suggest that both spatial and temporal variations in extensional strain and displacement–length scaling relations, along with fault restriction, are recorded by Martian fault populations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 31, Issue 7, July 2009, Pages 662–673
نویسندگان
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