How do isotopic ratios of elements in hotspot lavas provide information about mantle heterogeneity?

The southeastern extension of the Austral Islands volcanic chain terminates near 29°S, 140°W at the active Macdonald Seamount. The 'hotspot' region near ... Nov 15, 2024 ... This study aims to improve understanding of climate-landscape linkages using hotspot volcanic islands in the tropics as natural laboratories. Sep 5, 2013 ... image: This is a map view of seismic shear-wave speed in the earth's upper mantle, highlighting the slow wave-speed channels (warm colors) ... Sep 13, 2022 ... yes. given the right geologic setting, and right ammount of time, mantle plumes can form anywhere. Plus there already ARE monogenetic, plume fed ... Jul 27, 2015 ... Scientists from Kiel find explanation for geochemically distinct parallel tracks of volcanoes formed by the same volcanic hotspot. A frequently-used hypothesis suggests that hotspots form over exceptionally hot regions in the mantle, which is the hot, flowing layer of the Earth beneath the ... Jan 1, 2020 ... We examine swell bathymetry and island drowning at 14 hotspots and find a correspondence between island lifespan and residence time atop swell bathymetry. Jul 3, 2016 ... The volcanoes of Hawaii, Iceland, the Galapagos and Yellowstone form from plumes of mantle beneath the surface, making them hotspot volcanoes. Feb 24, 2022 ... Despite the geographical distance and separation by the Great Dividing Range, these authors found that the volcanoes developed parallel and ... Sep 5, 2013 ... The model revealed channels – dubbed “low-velocity fingers” by the researchers – where seismic waves traveled unusually slowly. The fingers ...