کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4691212 1636711 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Continental like crust beneath the Andaman Island through joint inversion of receiver function and surface wave from ambient seismic noise
ترجمه فارسی عنوان
پوسته قاره ای زیر جزیره اندام از طریق جابجایی مجدد عملکرد گیرنده و موج سطح از سر و صدای لرزه محیطی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Continental like crust beneath the Andaman Island
• Crustal thickness 24–32 km and average crustal shear velocity ~ 3.6 km/s
• Andaman flysch sediments thickness varying between 2 and 6 km

We study shear wave velocity structure of the crust beneath the Andaman Island through joint inversion of the teleseismic receiver function and Rayleigh wave group velocity measurements from 10 broadband seismographs over the Island. The group velocities in the periods from 5 to 21 s are obtained using cross-correlation of six month's ambient seismic noise data recorded by these seismic stations. Joint inversion results show ~ 2 to 6 km thick subsurface low shear velocity (Vs ~ 1.3–2.5 km/s) layer followed by a 12–14 km thick layer of silicic material (average Vs ~ 3.5 km/s). The lower crust is mapped as an 8–12 km thick mafic layer with Vs ~ 4.0 km/s. Uppermost mantle shear wave velocity is ~ 4.55 km/s. The near-surface low-velocity layer is interpreted as the Andaman flysch sediments. The crustal thickness beneath the Andaman Island varies from ~ 24 km in the north to ~ 32 km in the south. The shear wave velocity-depth results show that the crustal structure beneath the Andaman Island is akin to continental crust, possibly the Burma continental crust. The subducting Indian plate may lie down below this overriding plate.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 687, 26 September 2016, Pages 129–138
نویسندگان
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