The geochemical structure of the South-East Indian Ridge

Details The geochemical structure of the South-East Indian Ridge The geochemical structure of the South-East Indian Ridge

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..88...47d&link_type=abstract

Earth and Planetary Science Letters, Volume 88, Issue 1-2, p. 47-59.

Physics

52

Scientific paper

Isotopic (Sr, Nd, Pb) and trace element data are reported for samples dredged along the South-East Indian Ridge (SEIR). They confirm the existence of a geochemical province under the Indian Ocean which is distinct from the provinces observed under the North Atlantic and Pacific Oceans. This province is characterized by the association of Sr and Nd isotopic enrichment features with a depleted Pb signature and of magmaphile element depletion features (low (La/Sm)N, (Nb/Zr)N, Rb/Sr with high Sm/Nd ratios).
On a regional scale, the data emphasize the strong relationship existing between the physical structure of the ridge system and its chemical characteristics. It is suggested that these chemical characteristics are the result of contribution of different mantle sources corresponding to different structures of the ridge system:
-``normal ridge'' segments,
-the ridge segment located on an immediately north of the St. Paul-Amsterdam massif,
-off-axis structures located on the structural link between Broken Ridge and Kerguelen.
In a model of ocean differentiation from Bulk Earth, it is suggested that SEIR mantle sources are the result of separate episodes of differentiation, all taking place more recently than the differentiation of the Atlantic and Pacific oceans.

Affiliated with

Also associated with

No associations

Rating

The geochemical structure of the South-East Indian Ridge 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 The geochemical structure of the South-East Indian Ridge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The geochemical structure of the South-East Indian Ridge will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-848391