A new plumbing system framework for mantle plume-related continental Large Igneous Provinces and their mafic-ultramafic intrusions
The magmatic components of continental Large Igneous Provinces (LIPs) include flood basalts and their plumbing system of giant mafic dyke swarms (radiating, linear, and the recently discovered circumferential type), mafic sill provinces, a lower crustal magmatic underplate, mafic-ultramafic (M–UM) intrusions, associated silicic magmatism, and associated carbonatites and kimberlites. This paper proposes a new plumbing system framework for mantle plume-related continental LIPs that incorporates all of these components, and provides a context for addressing key thematic aspects such as tracking magma batches “upstream” and “downstream” and their geochemical evolution, assessing the setting of M-UM intrusions and their economic potential, interpreting deep magmatic component identified by geophysical signatures, and estimating magnitudes of extrusive and intrusive components with climate change implications. This plumbing system model, and its associated implications, needs to be tested against the rapidly improving LIP record.
|Journal||Journal of Volcanology and Geothermal Research|
Ernst, R.E, Liikane, D.A. (D. A.), Jowitt, S.M. (S. M.), Buchan, K.L. (K. L.), & Blanchard, J.A. (J. A.). (2019). A new plumbing system framework for mantle plume-related continental Large Igneous Provinces and their mafic-ultramafic intrusions. Journal of Volcanology and Geothermal Research, 384, 75–84. doi:10.1016/j.jvolgeores.2019.07.007