| Abstract: | Volcanic rock dredged from the flanks of four volcanic edifices in the Ratak chain of the Marshall Islands consist of alkalic lava that erupted above sea level or in shallow water. Compositions of recovered samples are predominantly differentiated alkalic basalt and hawaiite but include strongly alkalic melilitite. Whole rock 40Ar/39Ar total fusion and incremental heating ages of 87.3 ?? 0.6 Ma and 82.2 ?? 1.6 Ma determined for samples from Erikub Seamount and Ratak Guyot, respectively, are within the range predicted by plate rotation models but show no age progression consistent with a simple hot spot model. Variations in isotopic and some incompatible element ratios suggest interisland heterogeneity. -from Authors |
| Genre: | Article |
| ProdID: | 70015476 |
| Citation Author: | Davis, A. S.; Pringle, M. S.; Pickthorn, L. -B. G.; Clague, D. A.; Schwab, W. C. |
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| Citation End Page: | 5774 |
| Citation Issue: | B5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Petrology and age of alkalic lava from the Ratak Chain of the Marshall Islands; 1989; Article; Journal; Journal of Geophysical Research; Davis, A. S.; Pringle, M. S.; Pickthorn, L. -B. G.; Clague, D. A.; Schwab, W. C. |
| Citation Start Page: | 5757 |
| Citation Volume: | 94 |
| Citation Year: | 1989 |
| Type: | citation/reference |
| Text: | Petrology and age of alkalic lava from the Ratak Chain of the Marshall Islands; 1989; Article; Journal; Journal of Geophysical Research; Davis, A. S.; Pringle, M. S.; Pickthorn, L. -B. G.; Clague, D. A.; Schwab, W. C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1989 00:00 -0600 |
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