GNGTS 2017 - 36° Convegno Nazionale

GNGTS 2017 S essione 3.1 583 mantle depleted, possibly caused to by the erosion of a lithospheric mantle thicker than in the present-day. References Aitken, A.R.A., Altinay, C. Gross, L., 2015. Australia’s lithospheric density field, and its isostatic equilibration. Geophys. J. Int. , 203, 1961–1976. Cawood, P., Korsch, R.J., 2008. Assembling Australia: proterozoic building of a continent, Precambrian Res., 166, 1–38. Direen, N.G., Crawford, A.J., 2003. The Tasman Line: where is it, what is it, and is it Australia’s Rodinian breakup boundary? Austral. J. Earth Sci., 50, 491–502. Fichtner, A., Kennett B. L. N., Igel H, Bunge H-P, 2010. Full waveform tomography for radially anisotropic structure: New insights into present and past states of the Australasian upper mantle. Earth Planet. Sci. Lett., 290, 270– 280. Fishwick S., Kennett, B.L.N., Reading A.M., 2005. Contrasts in lithospheric structure within the Australian craton— insights from surface wave tomography. Earth Planet. Sci. Lett., 231, 163– 176. Kaban, M.K., Tesauro M., Mooney, W D., Cloetingh, S. A. P. L., 2014. Density, temperature, and composition of the North American lithosphere—New insights from a joint analysis of seismic, gravity, and mineral physics data: 1. Density structure of the crust and upper mantle. Geochemistry, Geophysics, Geosysthem 10.1002/2014GC005483. Kennett B. L. N., Salmon M., Saygin E., AusMoho Working Group, 2011. AusMoho: the variation of Moho depth in Australia. Geophys. J. Int . , 187, 946–958. Tesauro M., Kaban, M.K., Mooney, W D., Cloetingh, S. A. P. L., 2014. Density, temperature, and composition of the North American lithosphere—New insights from a joint analysis of seismic, gravity, and mineral physics data: 2. Thermal and compositional model of the upper mantle. 10.1002/2014GC005484. Fig. 1 - Density structure of the upper mantle of the Australian plate at depth of 100 km and along 3 cross-sections. The initial model is estimated from the inversion of the seismic tomography model AusREM (http://rses.anu.edu.au/ seismology/AuSREM/index.php). The compositional model is estimated in a joint inversion with the residual mantle anomalies and residual topography. The final density distribution is shown in the bottom cross-sections.