کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4691850 1636759 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thailand's crustal properties from tele-seismic receiver function studies
ترجمه فارسی عنوان
خواص پوسته تایلند از مطالعات عملکرد گیرنده لرزه ای تلسکوپی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Crustal thickness increases from west (30.8 km) to east (38.2 km) terranes.
• Poisson's ratio increases from west (0.23) to east (0.25) of Thailand.
• The low Poisson's ratio indicates that the crustal composition is mostly felsic.
• Only the lower crust of the Khorat Plateau is thicker, denser and higher mafic.

Thirty-three seismic stations throughout Thailand were used to infer the crustal thickness, Vp/Vs ratio and Poisson's ratio of Thailand using the receiver function technique. The crustal thickness increases from around 31 km in the Shan-Thai terrane (STT) in the west to around 38 km in the Khorat Plateau (KP-ICT) located in the Indochina terrane (ICT) in the east. Similarly, the mean Vp/Vs and Poisson's ratios derived here show that Vp/Vs increases from 1.69 to 1.73 from the STT to the KP-ICT, while Poisson's ratio increases from 0.23 to 0.25 from the STT to the KP-ICT. Our results are well supported by geological evidence found at the surface. In addition, we incorporate gravity and magnetic data to constrain the crustal properties of Thailand. The low Poisson's ratios show that the crust of Thailand is mostly felsic. Only the lower crust of KP-ICT is different as it is thicker, denser and has higher mafic composition than the other terranes of Thailand. This special feature in the KP-ICT is required to explain the lower Bouguer anomaly in the KP-ICT. In addition, we interpret the crustal evolution and deformation of these terranes and compare our results with the results from the Vietnam network of the ICT.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tectonophysics - Volume 632, 29 September 2014, Pages 64–75
نویسندگان
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