Mid-Atlantic Ridge : zero-age geochemical variations between Azores and 22°N
| Type | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | 1980 | ||||||||
| Language | English | ||||||||
| Author(s) | Bougault Henri, Treuil M. | ||||||||
| Source | Nature (Macmillan Journals), 1980 , Vol. 286 , N. 5770 , P. 209-212 | ||||||||
| Mot-Clé(s) | Histoire Ifremer | ||||||||
| Abstract | The MAPCO cruise of RV J. Charcot sampled zero-age basalts along the Mid-Atlantic Ridge from the Azores Triple Junction to 24 N. Preliminary shipboard geochemical analyses together with earlier data show that some trace elements are not randomly distribued along the ridge. The latitude of the Haves transform delineate two regions of rare earth element distribution : north from Hayes, is flat to light rare (or equivalent) enriched : south from Hayes, is light rare earth (or equivalent) depleted. These findings indicate large scale heterogeneity of the upper mantle. [NOT CONTROLLED OCR] | ||||||||
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