How do the isotopic compositions of hotspot lavas provide clues about their origin?

A volcanic "hotspot" is an area in the mantle from which heat rises as a thermal plume from deep in the Earth. High heat and lower pressure at the base of the ... Hotspots at the seafloor create subsea volcanoes; building upward, they ultimately become volcanic islands. Hotspots are stationary but the crusts above them ... Jul 3, 2016 ... The volcanoes of Hawaii, Iceland, the Galapagos and Yellowstone form from plumes of mantle beneath the surface, making them hotspot volcanoes. Sep 5, 2013 ... Scientists at UC Berkeley have detected previously unknown channels of slow-moving seismic waves in Earth's upper mantle, a discovery that helps ... Nov 15, 2024 ... This study aims to improve understanding of climate-landscape linkages using hotspot volcanic islands in the tropics as natural laboratories. In an oceanic hotspot environment, for example Hawaii, dark, silica-poor basalt magma is produced. The runny basalt forms broad sloping shield volcanoes (Fig. 6) ... Jan 30, 2025 ... Instead, the Hawaiian Islands are what's called a volcanic hotspot. A single point where volcanoes form. The giveaway is that as you move from ... Apr 3, 2024 ... Volcanic hotspots are permanent and localized regions of intense volcanic activity on Earth's surface, typically found in the interior of ... Jan 30, 2025 ... This impressive geological journey stretches for around 6,000 kilometers, reaching just shy of Russia and Alaska. Excitingly, located just ... Here we present new age and geochemical data from volcanic samples from Richardson Seamount, the Agulhas Ridge along the Agulhas-Falkland Fracture Zone (AFFZ) ...