RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 12, ES3004, doi:10.2205/2012ES000515, 2012

MORB-like mantle beneath Lanzerote Island, Canary Islands

A. F. Grachev

Schmidt Joint Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia


Our newly obtained data on the He-Ar and Sr-Nd isotopic systematics of mantle xenolith and their host basalts suggest the absence of a mantle plume beneath Lanzerote Island. The R/Ra ratio of the xenoliths lies within the range typical of MORB. The He isotopic composition of basalts from Lanzerote Island provides evidence of the mixing of two sources: MORB and atmospheric. The He isotopic ratios of both the xenoliths and the basalts do not show any correlations with the Sr and Nd isotopic characteristics.

Received 18 April 2012; accepted 20 April 2012; published 8 May 2012.

Keywords: Lanzerote Island; mantle xenoliths; basalts; He-Ar and Sr-Nd isotopes


Citation: Grachev A. F. (2012), MORB-like mantle beneath Lanzerote Island, Canary Islands, Russ. J. Earth Sci., 12, ES3004, doi:10.2205/2012ES000515.

Copyright 2012 by the Geophysical Center RAS