Recent publications by members

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Jan-Feb 2021

Title: Strontium isotope analysis of apatite via SIMS

Authors: Gillespie, J., Nemchin, A.A., Kinny, P.D., Martin, L., Aleshin, M., Roberts, M.P., et al

Journal: Chemical Geology

Doi: https://doi.org/10.1016/j.chemgeo.2020.119979

Summary: A new SIMS-based method to measure 87Sr/86Sr ratios in apatite at a spatial resolution that will allow studies of tiny apatite inclusions in zircons with geologically useful precision. Applications include crustal evolution studies, igneous petrogenesis and biogenic phosphates.

Title: Recycled volatiles determine fertility of porphyry deposits in collisional settings

Authors: Bo Xu, William L. Griffin, Zeng-Qian Hou, Yongjun Lu, Elena Belousova, Ji-Feng Xu and Sue O'Reilly

Journal: American Mineralogist

Doi: https://doi.org/10.2138/am-2021-7714

Summary: Systematic apatite geochemistry and isotope work in the Tethyan belt revealed that fertile intrusions have higher apatite Cl and S concentrations than those from barren intrusions. Apatite Sr isotope indicates that volatiles involved in collisional porphyry Cu deposits were derived from pre-enriched continental lithospheric mantle.

Title: U-series histories of magmatic volatile phase and enclave development at Soufrière Hills Volcano, Montserrat

Authors: McGee, L., Reagan, M., Turner, S., Sparks.R.S., Handley. H., Didonna, R., Berlo, K., Hansen, S., Barclay, J

Journal: Chemical Geology

Doi: https://doi.org/10.1016/j.chemgeo.2020.119957

Summary: Isotopes and trace elements support rapid expulsion of a volatile phase from mafic magma, although no evidence for widespread transfer of volatiles from enclave to host andesite. Cu may have been transported from deeper mafic magma in volatile phase.

2020

Title: A Downgoing Indian Lithosphere Control on Along-Strike Variability of Porphyry Mineralization, Tibet

Authors: Xiang Sun, Yongjun Lu, Qiang Li, Ruyue Li

Journal: Economic Geology

Doi: Find the article here

Summary: Paleocene-Eocene igneous rocks and Miocene granitoids in the Gangdese belt of southern Tibet exhibit coupled along-arc isotopic variations, characterized by bulk-rock ɛNd(t) and zircon ɛHf(t) values increasing from ~84° to ~92°E and then decreasing toward ~95°E. These are interpreted to reflect increasing contributions of subducted Indian continental materials from ~92° to ~84°E and from ~92° to ~95°E, respectively.

Title: The association between Ni-Cu-PGE sulfide and Ni-Co lateritic ores and volcanic facies within the komatiites of the 2.7 Ga East Yilgarn Craton Large Igneous Province, Western Australia

Authors: Gole, Martin J. & Barnes, Stephen J.

Journal: Ore Geology Reviews

Doi: https://doi.org/10.1016/j.oregeorev.2019.103231

Summary: An updated volcanological model for the extensive ~2.70 Ga komatiites of the Eastern Goldfields terrane of the Yilgarn Craton, relating volcanic facies and lithology to ore deposit occurrence. A Google Earth file is available containing the extensive body of geological and geochemical data accumulated over 40 years of research.

Title: Sulfide Emplacement and Migration in the Nova-Bollinger Ni-Cu-Co Deposit, Albany-Fraser Orogen, Western Australia

Authors: Barnes, Stephen J., Taranovic, V., Miller, J. M., Boyce, G. & Beresford, S. W.

Journal: Economic Geology

Doi: https://doi.org/10.5382/econgeo.4758

Summary: Evidence of syn-tectonic, syn-metamorphic emplacement of the Nova Ni-Cu-Co magmatic sulfide ores into granulite gneisses. The sulfide magmas melt their way into the country rocks, and continue to migrate and crystallise as deformation continues subsequent to intrusion, at temperatures within the melting range of the sulfide assemblage.

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