EXPLOSION SEISMIC REFLECTIONS FROM THE EARTH'S CORE
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Thybo H. | |
dc.contributor.author | Ross A.R. | |
dc.contributor.author | Egorkin A.V. | |
dc.date.accessioned | 2021-11-21T03:19:37Z | |
dc.date.available | 2021-11-21T03:19:37Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13426091 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2003, 216, 4, 693-702 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32282 | |
dc.description.abstract | Recent seismological studies have presented evidence for the existence of a layer with ultra-low seismic velocities at the core–mantle boundary at ca. 2900 km depth. We report high-amplitude, high-frequency, and laterally coherent seismic arrivals from three nuclear explosions in Siberia. With recording station intervals of 15 km, the seismic phases are readily correlated and show the presence of a thin, ultra-low velocity zone in a region where it was not previously reported. The duration and complexity of the arrivals are inconsistent with a simple core–mantle boundary and require a hitherto unidentified, kilometre-scale, fine structure in the ultra-low velocity zone. The observations may be explained by a ca. 7 km thick, two-layer, ultra-low velocity zone with exceptional low velocities, which indicate the presence of high percentages of melt (>15%), in particular in the lower part of the zone. Waveform variation implies lateral change in the thickness and physical properties of the ultra-low velocity zone with a wavelength of less than 100 km. | |
dc.title | EXPLOSION SEISMIC REFLECTIONS FROM THE EARTH'S CORE | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru