Multiple melt source origin of the Line Islands (Pacific Ocean)
Geology
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Abstract
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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Multiple melt source origin of the Line Islands (Pacific Ocean) |
| Series title | Geology |
| DOI | 10.1130/G49306.1 |
| Volume | 49 |
| Issue | 11 |
| Publication Date | July 23, 2021 |
| Year Published | 2021 |
| Language | English |
| Publisher | Geological Society of America |
| Contributing office(s) | Pacific Coastal and Marine Science Center |
| Description | 5 p. |
| First page | 1358 |
| Last page | 1362 |
| Other Geospatial | Line Islands |