کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4734254 | 1357082 | 2009 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Geometry, displacement–length scaling, and extensional strain of normal faults on Mars with inferences on mechanical stratigraphy of the Martian crust Geometry, displacement–length scaling, and extensional strain of normal faults on Mars with inferences on mechanical stratigraphy of the Martian crust](/preview/png/4734254.png)
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.
Journal: Journal of Structural Geology - Volume 31, Issue 7, July 2009, Pages 662–673