Seismic images of Earth's interior reveal two massive anomalous zones at the base of the mantle, above the core, where seismic waves travel slowly. The mantle materials that …
Seismic tomography reveals 2 extensive regions in the lowermost mantle, beneath Africa and the Pacific, that exhibit lower-than-average seismic wave speeds. These regions have …
S Xia, D Zhao, J Sun, H Huang - Gondwana Research, 2016 - Elsevier
Intraplate volcanism during the Late Cenozoic in the Leiqiong area of southernmost China, with basaltic lava flows covering a total of more than 7000 km 2, has been attributed to an …
Traditional models of the supercontinent cycle predict that the next supercontinent—'Amasia'— will form either where Pangaea rifted (the 'introversion'model) or on the opposite side of the …
Lavas erupted at ocean island hotspots such as Hawaii have diverse geochemical signatures. These ocean island basalts are thought to be derived from many sources with …
Helium isotopes provide an important tool for tracing early-Earth, primordial reservoirs that have survived in the planet's interior,,. Volcanic hotspot lavas, like those erupted at Hawaii …
Previous studies have documented the presence of ultra-low-velocity-zones (ULVZs) at the base of the mantle, through observations of body wave complexities. Geometrically their …
A Stracke, M Willig, F Genske… - Geochemistry …, 2022 - Wiley Online Library
The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr …
The lowermost (> 2400km) Earth's mantle mapped by seismic tomography is strongly heterogeneous, the most striking feature being two large regions where shear-wave velocity …