کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8907988 1635335 2018 37 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rheologic survey of mass transport events from the geologic record of an Andean Precordilleran slope
ترجمه فارسی عنوان
بررسی رئوولیک رویدادهای حمل و نقل جرمی از رکورد زمین شناسی شیب اوردهیلران اندی
کلمات کلیدی
فن آلوویو، جریان انقباض غیر انسانی، رئوئولوژی، آند کوه،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
Gravitational processes are the most substantial mechanisms of continental sediment transport. Sedimentary deposits produced by these processes record evidence of the sediment transport mechanism and flow regime, as well as rheologic characteristics. This study aims to analyze sedimentary deposits at the Andean Precordillera in order to interpret the sediment transport mechanism and understand the rheologic behavior of the mass flows. The studied area, situated in Neuquén Province, Argentina, comprises a small-scale drainage basin and an alluvial fan. The study approach includes the description and analysis of fractures, landslide head scarps, texture, and geometry of sedimentary deposits. In the drainage basin, we identified planar landslide head scarps associated with deposits of talus and marginal levees. Sedimentary deposits record rockfall, non-cohesive debris flow, and catastrophic and normal stream flow mechanisms of sediment transport. The triggered mechanism is highly controlled by the high slope and climate conditions. A turbulent flow regime with Newtonian rheologic behavior was interpreted for the stream flow events, whereas a laminar flow regime with plastic (non-Newtonian) rheologic characteristics was related to the non-cohesive debris flows.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 315, 15 August 2018, Pages 57-67
نویسندگان
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