5K (2025-2027): CAREER: New imaging of mid-ocean ridge systems at the Galápagos triple junction
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FDSN Network Information
| FDSN code | 5K (2025-2027) | Network name | CAREER: New imaging of mid-ocean ridge systems at the Galápagos triple junction (GTJ) |
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| Start year | 2025 | Operated by |
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| End year | 2027 | Deployment region | - |
| Description |
This project involves a multi-year broadband ocean bottom seismometer (OBS) deployment across the Galápagos triple junction, involving two diachronous, overlapping ~40 station arrays spanning >400km along strike and perpendicular to the Pacific-Cocos and Cocos-Nazca spreading centers. Surface and body wave tomographic imaging of these MORs, including measurements of seismic attenuation, scattered phases, and seismic anisotropy will provide unprecedented spatial and methodological coverage of lithospheric and asthenospheric structure. This work will: 1) Test predicted signatures of dynamic upwelling; 2) Image MOR melt, dehydration, and shear structures that may persist in mature lithosphere; 3) Explore the 3-D organization of mantle flow beneath the ridges; 4) Exploit contrasts in spreading rate and ridge migration over underlying mantle to gauge the importance of these parameters on ridge dynamics; 5) Investigate MOR maturation beneath a propagating spreading center. Broader impacts target each stage of the pipeline into research: Outreach will educate and engage the broader public and enhance recruitment of high schoolers into the geoscience major. Training will provide research and education opportunities for undergraduate and graduate students through cruises and classwork. Building a Network of Leaders will establish a skilled cohort of early career investigators, and generate an open-source manual for planning OBS deployments. This experiment will also contribute to the international PacificArray initiative, and provide new data for global and deep mantle tomography. |
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