کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4684044 1635388 2016 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evolution of continental-scale drainage in response to mantle dynamics and surface processes: An example from the Ethiopian Highlands
ترجمه فارسی عنوان
تکامل زهکشی مقیاس قاره ای در پاسخ به پویایی و فرایندهای سطحی گوشته: نمونه ای از ارتفاعات اتیوپی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی

Ethiopia offers an excellent opportunity to study the effects and linkage between mantle dynamics and surface processes on landscape evolution. The Ethiopian Highlands (NW Ethiopia), characterized by a huge basaltic plateau, is part of the African Superswell, a wide region of dynamically-supported anomalously high topography related to the rising of the Afar plume. The initiation and steadiness of dynamic support beneath Ethiopia has been explored in several studies. However the presence, role, and timing of dynamic support beneath Ethiopia and its relationship with continental flood basalts volcanism and surface processes are poorly defined. Here, we present a geomorphological analysis of the Ethiopian Highlands supplying new constraints on the evolution of river network. We investigated the general topographic features (filtered topography, swath profiles, local relief) and the river network (river longitudinal profiles) of the study area. We also apply a knickpoint celerity model in order to provide a chronological framework to the evolution of the river network. The results trace the long-term progressive capture of the Ethiopian Highlands drainage system and confirm the long-term dynamic support of the area, documenting its impact on the contrasting development of the Blue Nile and Tekeze basins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 261, 15 May 2016, Pages 12–29
نویسندگان
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