Results 171 to 180 of about 120,010 (213)

Looking for mantle plumes

Physics Today, 2011
Seismic images of Earth’s interior offer evidence that hot columns of buoyant rock from deep in the mantle are the source of the volcanism at Yellowstone and similar hot spots. Yet mysteries remain.
Eugene Humphreys, Brandon Schmandt
openaire   +1 more source

Mantle Amphiboles and Mantle Plumes

Mineralogical Magazine, 1998
Metasomatic minerals such as clinopyroxene, amphibole, phlogopite or apatite found in many mantle xenoliths provide evidence for fluid migration through mantle rocks and reaction with mantle minerals. The chemical composition of these minerals give us insight into the nature and composition of the percolating fluids, the processes of fluid-melt ...
openaire   +1 more source

Mantle plume tomography

Chemical Geology, 2007
We review the resolution currently available with seismic tomography, in particular the ability of seismic waves to image mantle plumes, and discuss frequently asked questions about artifacts, interpretation and possible systematic errors. These aspects are discussed in more detail for two case histories offering different problems in the tomographic ...
Guust Nolet, Richard Allen, Dapeng Zhao
openaire   +1 more source

The elusive mantle plume

Earth and Planetary Science Letters, 2003
Abstract Mantle plumes are hypothetical hot, narrow mantle upwellings that are often invoked to explain hotspot volcanism with unusual geophysical and geochemical characteristics. The mantle plume is a well-established geological structure in computer modeling and laboratory experiments but an undisputed seismic detection of one has yet to be made ...
Jeroen Ritsema, Richard M. Allen
openaire   +1 more source

Iceland Mantle Plume

Nature, 1973
O'HARA1 has objected to my interpretation concerning the trace element chemistry of lavas erupted along the Iceland-Reykjanes Ridge System2 on the ground that: (1) Such magmas are not “primary magmas” but residual liquids; (2) instead, such lavas have suffered prior to eruption extensive “gabbro fractionation” at low pressure (olivine-augite ...
openaire   +1 more source

Mantle plumes persevere

Nature Geoscience, 2011
The ocean floor is littered with hundreds of thousands of mostly extinct volcanoes. The origin of at least some of these seamounts seems to rest with mantle plumes.
openaire   +1 more source

PALEOGEOTHERMS AND MANTLE PLUMES

International Geology Review, 1986
Translated from "Paleogeotermy i mantiynyye strui," Izvestiya AN SSSR, seriya geologicheskaya, 1986, No. 7, pp. 16-25. The author is with the Institute of the Lithosphere, USSR Academy of Sciences, Moscow. On the basis of his recalibration of xenolith thermobarometers, he distinguishes convective geothermal gra­ dients associated with mantle plumes ...
openaire   +1 more source

Mantle plumes

Tectonophysics, 1991
openaire   +1 more source

Mantle Plumes

Journal of Geodynamics, 2001
openaire   +1 more source

Mantle Plumes

2011
Cinzia G. Farnetani, Albrecht W. Hofmann
openaire   +1 more source