کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6430688 | 1634811 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Detection of ridge-like structures in the Pacific Large Low-Shear-Velocity Province Detection of ridge-like structures in the Pacific Large Low-Shear-Velocity Province](/preview/png/6430688.png)
Waveform tomography is conducted for SH velocity structures of the entire mantle using approximately 3.5 times the data used for obtaining the previous model, SH18CE. The resultant new model, SH18CEX, exhibits a cluster of ridge-like low-velocity anomalies in the western part of the Pacific Large Low-Shear-Velocity Province (LLSVP). The location of the ridge-like anomalies is in good agreement with the location of the abrupt change in the topography of the Dâ³ discontinuity. These results suggest that the LLSVP is associated with a cluster of ridge-like-piles, rather than a single large pile spread over the entire region. The piles probably consist of intrinsically dense material; however, either their volume or density contrast may not be sufficiently large to develop large-scale domes.
Journal: Earth and Planetary Science Letters - Volumes 319â320, 15 February 2012, Pages 55-64