Multiple melt source origin of the Line Islands (Pacific Ocean)

Geology
By: , and 

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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
Edition Online First
Year Published 2021
Language English
Publisher Geological Society of America
Contributing office(s) Pacific Coastal and Marine Science Center
Other Geospatial Line Islands
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