Mantle heterogeneity from trace elements: MAR triple junction near 14°N

Details Mantle heterogeneity from trace elements: MAR triple junction near 14°N Mantle heterogeneity from trace elements: MAR triple junction near 14°N

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..88...27b&link_type=abstract

Earth and Planetary Science Letters, Volume 88, Issue 1-2, p. 27-36.

Computer Science

39

Scientific paper

The trace element composition of basalts dredged at the axis of the Mid-Atlantic Ridge between 12°N and 17°N by the R/V ``Akademik Boris Petrov'' demonstrates the presence of a high-amplitude geochemical anomaly, centered around 14°N and extending at least 300 km along the strike of the Rift Valley. The anomaly does not fit easily into any of the models that have been proposed: it may reflect the upwelling of an embryonic mantle plume or of a passive mantle domain responsible for or associated with a triple junction, possibly marking a recent shift into the area of the South American/North American plate boundary.

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