Document Type

Article

Publication Date

2021

DOI

10.1029/2021GL093150

Publication Title

Geophysical Research Letters

Volume

48

Issue

15

Pages

e2021GL093150 (1-8)

Abstract

In the study of marine large igneous provinces, investigations often focus on the importance of mantle plumes in generating excess magmatism. Few studies, however, have addressed the role of plate boundary processes in promoting widespread and extensive mantle melting. This study investigates how spreading center geometry may have facilitated the emplacement of Shatsky Rise, an oceanic plateau in the western Pacific Ocean. The largest structure within Shatsky Rise, Tamu Massif, was created ∼140–150 Ma at the Pacific-Izanagi-Farallon (PIF) ridge-ridge-ridge triple junction. Moreover, the PIF triple junction was one of three triple junctions operating in close proximity at the time, as the nascent Pacific Plate (NPP) began to expand in size. This study suggests that the thermal conditions of the NPP, which likely resulted in a large area of thin lithosphere, could have significantly facilitated widespread mantle melting as well as the magmatic expression of any nearby mantle plume.

Comments

Copyright © 2021 American Geophysical Union.

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Original Publication Citation

Georgen, J. E., & Shotorban, A. K. (2021). Plate boundary and triple junction control of Shatsky Rise formation and implications for other ocean plateaus. Geophysical Research Letters, 48(15), 1-8, Article e2021GL093150. https://doi.org/10.1029/2021GL093150

Available for download on Saturday, January 15, 2022

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