کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4727863 | 1356400 | 2009 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Seismic imaging of the upper mantle under the Erebus hotspot in Antarctica Seismic imaging of the upper mantle under the Erebus hotspot in Antarctica](/preview/png/4727863.png)
P-wave velocity images are determined under the Mount Erebus volcano, Antarctica by using teleseismic tomography. Our results show a prominent low-velocity (low-V) anomaly of nearly circular symmetry (about 250–300 km in diameter) to about 200 km depth under the Mount Erebus volcanic region, which further extends down to ~ 400 km as a narrow tilted column. The observed low-V anomaly beneath the Mount Erebus volcano can be expression of a thermal anomaly of deep origin. Combining the seismically imaged thermal anomaly with geochemical observation of rift-related volcanism in the region, we consider that the Mount Erebus is a hotspot due to West Antarctic Rift System linked with a mantle plume. In addition, high-velocity anomalies are imaged beneath the East Antarctic craton, being consistent with the previous studies.
Journal: Gondwana Research - Volume 16, Issue 1, August 2009, Pages 109–118