Mantle diapir

Griffiths RW (1986) The differing effects of compositional and thermal buoyancies on the evolution of mantle diapirs. Phys Earth Planet Inter 43 261-273... 

Bosch D. (1991) Sr and Nd isotopic evidence for sea water infiltration into the Zabargad mantle diapir. Red Sea. Comptes Rendus de TAcademie des Sciences, Serie 2 313, 49-56. 

Bosch D. and Bruguier O. (1998) An early miocene age for a high-temperature event in gneisses from Zabargad Island (Red Sea, Egypt) mantle diapirism Terra Nova 10, 274-279. 

Burg J.-P., Bodinier J.-L., Chaudhry S., Hussain S. S., and Dawood H. (1998) Infra-arc mantle-crust transition and intra-arc mantle diapirs in the Kohistan Complex (Pakistani Himalaya) petro-structural evidence. Terra Nova 10, 74-80. 

Lx)rand J.-P., Keays R. R., and Bodinier J.-L. (1993) Copper and noble metal enrichments across the hthosphere-astheno-sphere boundary of mantle diapirs evidence from the Lanzo Iherzolite massif. J. Petrol. 34, 1111-1140. 

Ozawa K. and Takahashi N. (1995) P-T history of a mantle diapir the Horoman peridotite complex, Hokkaido, northern Japan. Contrib. Mineral. Petrol. 120, 223-248. 

Quick J. E. (1981) Petrology and petrogenesis of the Trinity peridotite, an upper mantle diapir in the eastern Klamath mountains, northern California. J. Geophys. Res. 86, 11837-11863. 

Seyler M. and Mattson P. H. (1993) Gabbroic and pyroxenite layers in the Tinaquillo, Venezuela, peridotite succession of melt intrasions in a rising mantle diapir. J. Geol. 101, 501-511. 

Cawthorn R. G. (1975) Degrees of melting in mantle diapirs and the origin of ultrabasic liquids. Earth Planet. Sci. Lett. 27, 113-120. 

Wakita, H., 1978. Helium spots caused by diapiric magma from the upper mantle. Science, 200 430-432. 

Brun, J. P., Gapais, D. Le, T. B. 1981. The mantled gneiss domes of Kuopio (Finland) interfering diapirs. Tectonophysics, 74, 283-304. 

Drury M. R., Van Roermund H. L. M., Carswell D. A., DeSmet J. H., Van Den Berg A. P., and Vlaar N. J. (2001) Emplacement of deep upper-mantle rocks into cratonic lithosphere by convection and diapiric upweUing. J. Petrol. 42, 131-140. 

Descending metal diapirs through crystalline lower mantle... 

MORB mantle. The convecting upper mantle sampled by MORB has He/" He = (8 1) Ra away from hotspots (see Graham 2002, this volume). In some areas, such as southeast Australia, xenolith He appears to have MORB He isotope compositions. This is not surprising, considering that much of the mantle underlying the continents must have this composition. It is also not incompatible with the involvement of diapiric mantle hotspots in the local volcanism. The He isotope composition of many hotspots have not been clearly characterized, and while hotspots are often assumed to have very high He/" He ratios as seen in Iceland and Hawaii, it has not been established that other hotspots, with very different trace element characteristics, all have such ratios. Further, the presence of such material does not preclude the involvement of MORB mantle as well within a particular lithospheric region. 

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