کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4688672 | 1635803 | 2008 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isostatic response of the Laccadive Ridge from admittance analysis of gravity and bathymetry data
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
The Laccadive Ridge (L-R), trending roughly parallel to the west coast of India, is an intriguing segment of the northernmost Chagos-Laccadive Ridge (C-L-R) system. Although crustal nature and isostatic response of the southern C-L-R is well known, there are no similar studies on the L-R. In the present study, the isostatic response of the lithosphere beneath the L-R is estimated so as to characterize its crustal nature, total crustal as well as effective elastic plate thickness and mode of compensation. Twelve gravity and bathymetry profiles across the ridge were analyzed using linear transfer function and forward model techniques. The observed admittance function within the diagnostic waveband of 250 < λ > 80 km (0.025 < k > 0.080 kmâ1) fits well with (i) the Airy model whose average crustal thickness (Tc) and density are 17 ± 2 km and 2.7 Ã 103 kg mâ3, respectively, and (ii) the thin plate flexure model of isostasy with an effective elastic plate thickness (Te) of 2-3 km. The estimated average crustal thickness and density are in good agreement with published seismic refraction results over the ridge. The results of the present study support an Airy model of isostasy for the L-R. The low Te value, in view of other published results in the study area, suggests stretched and loaded continental lithosphere of the L-R during the evolution of the western continental margin of India.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Geodynamics - Volume 46, Issues 1â2, August 2008, Pages 10-20
Journal: Journal of Geodynamics - Volume 46, Issues 1â2, August 2008, Pages 10-20
نویسندگان
A.K. Chaubey, K. Srinivas, B. Ashalatha, D. Gopala Rao,