How does the unique chemistry of hydrothermal vents associated with Earth's hotspots inform the search for habitable environments elsewhere?

Dec 5, 2022 ... A line of volcanic activity stretching from the Columbia Plateau of eastern Oregon and Washington all the way to the Yellowstone Plateau at the intersection of ... Oct 29, 2013 ... This discovery helps to explain how “hotspot volcanoes”—the kind that give birth to island chains like Hawaii and Tahiti—come to exist ... 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) ... The southeastern extension of the Austral Islands volcanic chain terminates near 29°S, 140°W at the active Macdonald Seamount. The 'hotspot' region near ... Volcanoes grow above hotspots. A hotspot is a zone of melting above a mantle plume. · Hotspot volcanoes are better able to penetrate oceanic crust than ... 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. Volcanic Hot Spots - A volcanic hot spot is an area in the mantle from which heat rises as a thermal plume from deep in the Earth. Jan 1, 2020 ... Island lifetime depends on the rate and magnitude of island subsidence, which, in turn, depends on the dynamics of the oceanic lithosphere and ... Non-hotspot volcano chains originating from small-scale sublithospheric convection. M. D. Ballmer,1 J. van Hunen,2 G. Ito,3 P. J. Tackley,1 and T. A. Bianco3. Feb 6, 2025 ... It is a spreading plate margin volcano as well as a hotspot volcano. Volcanic hazards. Volcanic hazards include explosions, lava flows, bombs or ...