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Dr. Anthony DOSSETO

Position:      Lecturer
Room:         41.160
Phone No:   +61 2 4221 4805
Email:          tonyd@uow.edu.au        

Research Interests

• Catchment erosion response to climate change over the last glacial cycle. How does the landscape respond/adapt to climate change?
• Soil production and erosion. Combined use of uranium-series and cosmogenic isotopes to study the controls on the evolution of weathering profiles and soil resources
• Sediment production and transport. How fast are sediments produced, stored and exported? Study of small and large catchments under various climates (semi-arid to temperate southeastern Australia, tropical Puerto Rico)
• The production of silicic magmas. Study of the mechanisms and rates of magma evolution in the crust and how they relate to eruptive styles

For more details, surf to my webpage (still at Macquarie Uni, soon to be transferred to UoW): click here

Representative Publications

H.S. Cunningham, S.P. Turner, A. Dosseto, H. Patia and S. Eggins. Temporal Variations in U-series Disequilibria in an Active Caldera, Rabaul, Papua New Guinea. Accepted for publication in Journal of Petrology (January 2009). Impact factor = 3.806 (2006 ISI Journal Citation Report).

A. Dosseto, S. P. Turner and J. Chappell, 2008. The evolution of weathering profiles through time: new insights from uranium-series isotopes. Earth Planet. Sci. Lett. 274 (3-4), 359-371.Impact factor = 3.887 (2006 ISI Journal Citation Report).

A. Dosseto, S.P. Turner, M. Sandiford and J. Davidson, 2008. Uranium-series isotope and thermal constraints on the rate and depth of silicic magma genesis, in: C. Annen, G. Zellmer, (Eds), Dynamics of crustal magma transfer, storage and differentiation, Special Publications 304, Geological Society, London, pp. 169-181.

J.T. Caulfield, S. Turner, A. Dosseto, N. Pearson and C. Beier, 2008. Source depletion versus extent of melting in the Tongan sub-arc mantle. Earth Planet. Sci. Lett. 273 (3-4), 279-288. Impact factor = 3.887 (2006 ISI Journal Citation Report).

K. W. Sims, J. Gill, A. Dosseto, D. L. Hoffmann, C. Lundstrom, R. Williams, L. Ball. D. Tollstrup, S. Turner, J. Prytulak, J. Glessner, J. Standish and T. Elliott, 2008. An inter-laboratory assessment of the Th isotopic composition of synthetic and rock standards. Geostandards and Geoanalytical Research 32 (1): 65-91. Impact factor = 2.049 (2006 ISI Journal Citation Report).

A. Dosseto, B. Bourdon and S. P. Turner, 2008. Uranium-series isotopes in river materials: insights into the timescales of erosion and sediment transport. “Frontiers” article. Earth and Planetary Science Letters 265 (1): 1 -17. Impact factor = 3.887 (2006 ISI Journal Citation Report).

In the TOP25 Hottest Articles of the journal Earth and Planetary Science Letters over the period January-March 2008: click here

R. C. Price, R. George, J. Gamble, S. Turner, I. Smith, C. Cook, B. Hobden and A. Dosseto, 2007. U-Th-Ra fractionation during crustal-level andesite formation at Ruapehu volcano, New Zealand. Chemical Geology 244 (3-4): 437-451. Impact factor = 2.716 (2006 ISI Journal Citation Report).

J. Davidson, S. Turner, H. Handley, C. Macpherson and A. Dosseto, 2007. An amphibole "sponge" in arc crust? Geology 35 (9): 787-790. Impact factor = 3.477 (2006 ISI Journal Citation Report).

A. Dosseto, B. Bourdon, J. Gaillardet, C. J. Allègre and L. Maurice-Bourgoin, 2006. Weathering and transport of sediments in the Bolivian Andes: time constraints from uranium-series isotopes. Earth and Planetary Science Letters 248: 759-771. Impact factor = 3.887 (2006 ISI Journal Citation Report).

In the TOP25 Hottest Articles of the journal Earth and Planetary Science Letters over the period July-September 2006: click here

A. Dosseto, S. Turner and G.B. Douglas, 2006. Uranium-series isotopes in colloids and sediments: time scale for sediment production and transport in the Murray-Darling River system. Earth and Planetary Science Letters 246: 418-431. Impact factor = 3.887 (2006 ISI Journal Citation Report).

A. Dosseto, B. Bourdon, J. Gaillardet, C. J. Allègre and N. Filizola, 2006. Timescale and conditions of chemical weathering under tropical climate: Study of the Amazon basin with U-series. Geochimica et Cosmochimica Acta, 70 (1): 71-89. Impact factor = 3.751 (2006 ISI Journal Citation Report).

In the TOP25 Hottest Articles of the journal Geochimica et Cosmochimica Acta over the period October-December 2005: click here

A. Dosseto, B. Bourdon, J. -L. Joron, and B. Dupré, 2003. U-Th-Pa-Ra study of the Kamchatka arc: New constraints on the genesis of arc lavas. Geochimica et Cosmochimica Acta, 67 (15): 2857-2877. Impact factor = 3.751 (2006 ISI Journal Citation Report).

B. Bourdon, S. Turner, and A. Dosseto, 2003. Dehydration and partial melting in subduction zones: constraints from U-series disequilibria. Journal of Geophysical Research, 108 (B6), doi:10.1029/2002JB001839. Impact factor = 2.800 (2006 ISI Journal Citation Report.

Searchable Publications

Suggested Topics for Future

1.    The response of Earth’s surface to climate change.

How did the Earth’s surface (soils, rivers) respond to changes in climate, tectonics and biology during the last glacial cycle? This will be addressed by combining novel isotope techniques: uranium-series (U-series), cosmogenic and clumped isotopes, along with OSL dating. Sites across Australia will be studied (Lake George, Lake Selina, Lynch’s Crater and Gulf of Carpentaria).

2.    The impact of early human arrival on the Australian environment.

How did the first Australians impacted their environment? The arrival of first humans on the Australian continent is believed to have resulted in an increase of bushfire frequency. But did they have a great impact on the environment, increasing bushfire intensity promoting soil erosion and river sediment fluxes? This will be investigated with the isotope techniques indicated above and at the same locations.

3.    The sustainability of soil resources.

U-series isotopes can be used to quantify rates of soil production. By comparing these to soil erosion rates inferred from cosmogenic isotope measurements, one can assess and predict the future evolution of soil resources.

4.    A novel technique to look for high-grade uranium ore deposits.

The fractionation of uranium isotopes in waters can be used to determine whether rocks drained by these waters represent high- or low-grade uranium ore deposits. The development of this technique is fundamental in a context where there is an increase need for uranium resources.

5.    Hotspot islands as a window of the chemical heterogeneity of the Earth’s mantle

A multi-isotope study (U-series, lithium and osmium) will investigate the composition of lavas erupted at the Azores (Atlantic) in order to unravel the different components at the origin of mantle heterogeneity and how they impact the generation of magmas at oceanic islands.

Abbreviated CV