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Showing 1–7 of 7 results
Advanced filters: Author: Daniel P. Miggins Clear advanced filters

  • Fresh basaltic glass preserved in a sample of volcanic breccia record a single eruptive event at the Alpha Ridge around 90 Ma, suggesting that parts of the ridge were emergent during the final stages of magmatism in the High Arctic Large Igneous Province, according to geochemical and geochronological analysis of the sample.

    • Marie-Claude Williamson
    • Grace E. Shephard
    • Jeff Harris
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 7, P: 1-14

  • Examination of the Easter hotspot reveals it as part of a vast, deep-seated mantle system, influencing seafloor spreading and shaping the Pacific Ocean, which challenges the view of hotspots as isolated volcanic centres.

    • John M. O’Connor
    • Marcel Regelous
    • Daniel E. Heaton
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-16

  • The ultimate driver of ultraslow spreading ridges is unknown. Here the authors use spreading rates derived directly from isotopic ages of seafloor samples to link magmatic and amagmatic segments with thermochemical variations in the upper mantle.

    • John M. O’Connor
    • Wilfried Jokat
    • Anthony A. P. Koppers
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-12

  • Low seismic velocity anomalies reveal a complex scenario of plume upwellings from a deep thermo-chemical anomaly (superplume) in the mantle below the East African Rift, however, geophysical observations alone are insufficient to identify the extent of plume influence on the magmatism along the rift. Here, the authors use Sr-Nd-Pb isotope data to show that superplume mantle underlies the entire rift system, from the Red Sea to the Indian Ocean south of Mozambique.

    • John M. O’Connor
    • Wilfried Jokat
    • Anthony A. P. Koppers
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-13