Multiple melt source origin of the Line Islands (Pacific Ocean)
| Autor: | Robert A. Pockalny, Katherine A. Kelley, Barry W. Eakins, Christina A. Wertman, G. A. Barth |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Geology. 49:1358-1362 |
| ISSN: | 1943-2682 0091-7613 |
| Popis: | The Line Islands volcanic chain in the central Pacific Ocean exhibits many characteristics of a hotspot-generated seamount chain; however, the lack of a predictable age progression has stymied previous models for the origin of this feature. We combined plate-tectonic reconstructions with seamount age dates and available geochemistry to develop a new model that involves multiple melt regions and multiple melt delivery styles to explain the spatial and temporal history of the Line Islands system. Our model identifies a new melt source region (Larson melt region at ~17°S, ~125°W) that contributed to the formation of the Line Islands, as well as the Mid-Pacific Mountains and possibly the Pukapuka Ridge. |
| Databáze: | OpenAIRE |
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