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::A glance at today's paper::  
Sheth, H.C. & E. Canon-Tapia, Are flood-basalt eruptions monogenetic or polygenetic?, Int. J. Earth Sci. (Geol Rundsch), in press, DOI 10.1007/s00531-014-1048-z

Don L. Anderson


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:: Notice Board ::

New book:

Large Igneous Provinces

Richard E. Ernst


Magmas Trapped at the Continental Lithosphere-Asthenosphere Boundary

C. Crépisson, G. Morard, H. Bureau, G. Prouteau, Y. Morizet, S. Petigirard & C. Sanloup


A global layer of incipient melt in the asthenosphere? Clues from electrical conductivity

F. Gaillard


Missing Pb, High 3He/4He, Ancient Sulfides and Continent Formation

S. Huang, C.-T. A. Lee & Q.-Z. Yin


Job opening:

Post-Doctoral Research Assistant,
Seismic Tomography,
Durham University


Mineralogy & Petrology solicits papers for:

Special issue in honor of Prof. Rex Pride

Deadline for submission of the papers: 31.10.2014

For further details, email Associate Editor, Prof. L.G. Gwalani


Themed issue in Geophere on:

Anatomy of Rifting: Tectonics and Magmatism in Continental Rifts, Oceanic Spreading Centers, and Transforms

Eds: Francesco Mazzarini, Carolina Pagli, Derek Keir, Eleonora Rivalta & Tyrone O. Rooney

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Charles Lyell


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:: Comments::

Dear WM, Although the paper "Burov, E. & T Gerya, Asymmetric three-dimensional topography over mantle plumes, Nature 513, 85–89 (04 September 2014) doi:10.1038/nature13703" purports to show that plumes can break up continents if the continent is pre-weakened by plate tectonic forces, what it actually shows is that if one artificially inserts a 200 km sphere below the continent with an excess temperature of 200-600°C then one can break a pre-weakened continent. The 200-km sphere appears out of nowhere, as a deus ex machina. The same method was used by Cordery et al to obtain melting under thick plates.–Don Anderson

 


Dear WM, It is curious that the same tomographic features have been interpreted in completely different ways. Faster than average seismic wave-speeds in the TZ have been considered to indicate ancient subducted slabs (Piromallo & Morelli, 2003; Handy et al., 2010). The same features, on the other hand, have also been interpreted as a volatile-free mantle plume head trapped in the TZ (Lavecchia & Bell, 2012; Bell et al., 2013).– Michele Lustrino


Dear WM, Interesting article in the most recent Economist publicising a Nobel laureate’s jaundiced views on “luxury journals” (Science, Nature and Cell). Seems like the groundswell of discontent is growing.–Andy Moore

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