کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9522161 | 1634962 | 2005 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pangea's complex breakup: A new rapidly changing stress field model
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Pangea's complex breakup: A new rapidly changing stress field model Pangea's complex breakup: A new rapidly changing stress field model](/preview/png/9522161.png)
چکیده انگلیسی
Over the years numerous proposals have been presented describing the relationship between the Central Atlantic Magmatic Province (CAMP) and the break-up of Pangea. Recent proposals have focused on refuting the original proposal of a mantle plume origin for the large igneous province and attendant dikes, and instead propose an upper mantle or passive cause for the break-up and CAMP. In this paper we examine the fundamental assumption that the multiple dike orientations associated with the break-up are geographically or temporally delimited. New mapping and compilations of older local maps demonstrate that multiple dike orientations ranging from NW- to NE-trending were intruded throughout the western Carolinas and are not geographically limited. Further, new plagioclase 40Ar / 39Ar dates indicate that all three orientations observed were emplaced within a 2 Ma period (c.a. 199-197 Ma). Based on this information we propose that a rapidly rotating stress field must be responsible for the emplacement of multiple dike orientations in the Carolinas and the break-up of Pangea and go on to propose several new tectonic models to account for this rotating stress field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 236, Issues 1â2, 30 July 2005, Pages 471-485
Journal: Earth and Planetary Science Letters - Volume 236, Issues 1â2, 30 July 2005, Pages 471-485
نویسندگان
E.K. Beutel, S. Nomade, A.K. Fronabarger, P.R. Renne,