Other
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..50..247b&link_type=abstract
Earth and Planetary Science Letters, Volume 50, Issue 1, p. 247-259.
Other
12
Scientific paper
Investigations of Rb-Sr systematics of basalts from the Afar depression (Ethiopia) indicate the presence of a heterogeneous mantle source region. The Sr isotopic compositions of the basalts from the Afar axial and transverse ranges identify source regions which are enriched in LIL elements and radiogenic Sr (axial ranges) and others which are relatively depleted (transverse ranges). Sr isotopic composition of basalts from the Red Sea, Gulf of Aden and Gulf of Tadjoura, which range from 0.70300 to 0.70340 are also reported and compared with the more radiogenic Afar region, which is characterized by 87Sr/86Sr ranging from 0.70328 to 0.70410.
Available geochemical and isotopic data suggest that a relation exists between magma composition and the advancement of the rifting process through progressive lithosphere attenuation leading to continental break-up. However, the petrogenetic process is not simple and probably implies a vertically zoned mantle beneath the Afar region. Sr isotopic evidence suggests that the vertically zoned mantle is more radiogenic and enriched in LIL elements in its upper part.
Barberi Franco
Civetta Lucia
Varet J.
No associations
LandOfFree
Sr isotopic composition of Afar volcanics and its implication for mantle evolution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sr isotopic composition of Afar volcanics and its implication for mantle evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sr isotopic composition of Afar volcanics and its implication for mantle evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-948184