کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4742161 1641553 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inversion of seismic waveforms for shear wave velocity structure in the lowermost mantle beneath the Hawaiian hotspot
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فیزیک زمین (ژئو فیزیک)
پیش نمایش صفحه اول مقاله
Inversion of seismic waveforms for shear wave velocity structure in the lowermost mantle beneath the Hawaiian hotspot
چکیده انگلیسی

We perform waveform inversion for the radial profile of shear wave velocity in the lowermost mantle beneath the Hawaiian hotspot. The data used in this study are waveforms observed mainly at epicentral distances around 90°. The dataset includes waveforms from the CANOE (CAnadian NOrthwest Experiment) array and from the CNSN (Canadian National Seismographic Network). These data greatly enhance the resolution of the lowermost mantle as compared to earlier studies. We find a velocity decrease in the depth range from 2700 km to the core–mantle boundary (CMB), which is interpreted as probably due to a temperature increase. The results of the present paper, taken together with our previous results for other regions beneath the Pacific, suggest that there is a large amount of impurities such as aluminum and iron beneath Hawaii and that there is strong lateral heterogeneity in D″ beneath the Pacific.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics of the Earth and Planetary Interiors - Volume 183, Issues 1–2, November 2010, Pages 136–142
نویسندگان
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