"It appears that the mantle plume
under the western U.S.
can apparently trigger continental breakups, softening the tectonic plates from below until they fragment - this is how the lost continent of Eastern Gondwana ended about 170 million years ago, prior research suggests.
The shallow depth of the northern end of the SER may be consistent with a mantle plume
, as is a possible gradation from mixed E-and N-MORB mantle at the shallowest depths to primarily N-MORB mantle farther south (Michael et al.
Plate tectonic activity influences biological evolution in terms of size and shape of the continents and ocean basins; topography of the land; morphology and depth of the sea floor; features such as mountain ranges-both oceanic and terrestrial; spreading centers; mantle plumes
; ocean currents; temperature; nutrients and chemistry of sea water; climate; sedimentary environments; location, size and type of igneous activity such as emplacement of granitic batholiths; and extrusion of large igneous basaltic provinces.
"The ascent of said deep mantle plume
generated a true chemical factory that enriched the mantle with metals, which would later generate the conditions for the creation of gold deposits.
A research led by a University of Calgary geophysicist provided strong evidence against continent formation above a hot mantle plume
, similar to an environment that presently exists beneath the Hawaiian Islands.
The 87Sr/86Sr = 0.704031-0.70525, 206Pb/204Pb = 18.408-19.062, 207Pb/204Pb = 15.476-15.677, 208Pb/204Pb = 38.061-39.414 and eNd = 0.3-5.3 of the volcanic rocks, all of these are similar to the feature of Neo-Tethyan mantle geochemical end member represented by Yaluzangbu ophiolites, and also to the volcanic rocks related to Onto Java and FOZO mantle plume
(Yu et al., 2009, 2011).
Campbell, I.H., Griffiths, R.W., and Hill, R.I., 1989, Melting in an Archean mantle plume
: Heads it is basalts and tails it is komatiites: Nature, v.
A more promising trail was blazed in 1972 when Jason Morgan of Princeton University proposed the "mantle plume