کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4731819 1356823 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Profiling of late Tertiary–early Quaternary surface in the lower reaches of Narmada valley using microtremors
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Profiling of late Tertiary–early Quaternary surface in the lower reaches of Narmada valley using microtremors
چکیده انگلیسی

In this paper, we propose the first approximation for thickness of Quaternary sediment and late Quaternary–early Tertiary topography for the part of lower reaches of Narmada valley in a systematic way using the shallow seismic method, that records both horizontal and vertical components of the microtremor (ambient noise) caused by natural processes. The measurements of microtremors were carried out at 31 sites spaced at a grid interval of 5 km s using Lennartz seismometer (5 s period) and City shark-II data acquisition system. The signals recorded were analysed for horizontal to the vertical (H/V) spectral ratio using GEOPSY software. For the present study, we concentrate on frequency range between 0.2 Hz and 10 Hz. The thickness of unconsolidated sediments at various sites is calculated based on non-linear regression equations proposed by Ibs-von Seht and Wohlenberg (1999) and Parolai et al. (2002). The estimated thickness is used to plot digital elevation model and cross profiles correlating with geomorphology and geology of the study area.


► Study proposes economic method to estimate thickness of unconsolidated sediments.
► Microtremor data was acquired by Lennartz seismometer and City shark-II instrument.
► The signals are analysed for H/V spectral ratio using GEOPSY software.
► Sediments thickness is calculated based on proposed non-linear regression equations.
► Quaternary–Tertiary interphase inferred explains palaeo surface and past processes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Asian Earth Sciences - Volume 41, Issue 3, 25 May 2011, Pages 325–334
نویسندگان
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