کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9536112 | 1357079 | 2005 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Grain size distribution and thickness of breccia and gouge zones from thin (<1Â m) strike-slip fault cores in limestone
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Grain size distribution and thickness of breccia and gouge zones from thin (<1Â m) strike-slip fault cores in limestone Grain size distribution and thickness of breccia and gouge zones from thin (<1Â m) strike-slip fault cores in limestone](/preview/png/9536112.png)
چکیده انگلیسی
Through field and laboratory analyses, the cross-sectional structure and the grain size distribution of 10 strike-slip fault cores less than 1Â m thick were studied. The fault cores are exposed in Jurassic platform limestone within the Mattinata Fault zone located in the Adriatic-Apulian foreland of southern Italy. Each fault core consists of a breccia zone and a gouge zone, which differ in thickness and grain size distribution. Through the conventional sieving-and-weighting method, the grain size distribution of 20 samples of fault rocks was obtained. The distributions follow power-laws with fractal dimension (D) in the 2.00977-3.04008 range. Gouge D-values are proportional to the normalised thickness of the corresponding gouge zones. For a gouge D-valueâ2.2, the thickness of the corresponding gouge zone is only about 3% of the fault core thickness, whereas for a gouge D-valueâ3.0, the thickness of the corresponding gouge zone is almost 90% of the fault core thickness. Results from this study suggest that, with progressing fault displacement: (i) grain comminution in fault cores occurred mostly by early bulk fragmentation of grains and late grain abrasion; (ii) breccia zones were progressively incorporated into the adjacent gouge zones.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Geology - Volume 27, Issue 10, October 2005, Pages 1823-1837
Journal: Journal of Structural Geology - Volume 27, Issue 10, October 2005, Pages 1823-1837
نویسندگان
Andrea Billi,