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Spatio-temporal constraints on lithospheric development in the southwest–central Yilgarn Craton, Western Australia

The Archean western Yilgarn Craton contains an extensive record of supracrustal formation from ca 3730 to ca 2670 Ma, as well as evidence of an ensialic crustal component as old as ca 4400 Ma. These features make the western Yilgarn Craton one of the oldest crustal provinces on...

Magmatic Mineral Systems

T. Campbell McCUAIG, S. S. ROMANO...

29 July 2012

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Characteristics and geodynamic setting of the 2.7 Ga Yilgarn heterogeneous plume and its interaction with continental lithosphere: Evidence from komatiitic-basalt and basalt geochemistry of the Eastern Yilgarn Craton

This paper compiles a high-precision major and trace element database of komatiitic basalts and basalts of the EYC from the second prevalent episode of magmatism.

D. CHAMPION, K. CASSIDY, Robert K...

29 July 2012

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Geochemistry of komatiites in the Southern Cross Belt, Youamni Terrane, Western Australia

It is suggested that the transitional character of the Southern Cross komatiites may be associated with a fundamental difference in the crustal architecture and craton keel thickness underlying the southeastern Youanmi Craton.

Gold Systems

Nicolas Thebaud, Luis Gallardo

5 July 2012

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Australia’s Moho: a test of the usefulness of gravity modelling for the determination of Moho depth.

We discuss the usefulness of gravity data to model Moho depth, and the advantages and disadvantages of several gravity modelling methods.

Geophysics & Image Analysis

M.L. Salmon, Alan Aitken, B.L.N....

3 July 2012

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Evidence of Water Degassing during emplacement and crystallization of 2.7 Ga komatiites from the Agnew-Wiluna greenstone belt, Western Australia

The main results of this study demonstrate that komatiites from the Agnew-Wiluna greenstone belt, irrespective of their initial water content, have degassed upon emplacement, flow and crystallization. More importantly, data show that komatiite flows most likely degassed more wa...

Magmatic Mineral Systems

W.E. Stone, S.W. Beresford, M. Fi...

30 June 2012

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LA-ICP-MS analysis on spinel from chromitites of different tectonic settings: their contrasted minor-and trace-elements compositions

Introducing the use of chromite trace element chemistry to determine the tectonic setting and origin of chromitite deposits

Magmatic Mineral Systems

William L. GRIFFIN, Suzanne Y. O’...

23 June 2012
Iron Oxides Chemistry from Highgrade Iron Ore, Iron Quadrangle

Most of the high-grade iron ore deposits in the Iron Quadrangle (IQ), Brazil are hosted by itabirites of the Caue Formation, a Paleoproterozoic Lake-Superior type Banded Iron Formation. The IQ was affected by two main orogenies, the Transamazonian (2.6 – 2.0 Ga) and the B...

Iron Systems

Carlos Rosiere, Ana-Sophie Hensle...

23 June 2012
Genesis of superimposed hypogene and supergene Fe orebodies in BIF at the Madoonga deposit, Yilgarn Craton, Western Australia

The Madoonga iron ore deposit in the Weld Range greenstone belt is the product of many overprinting hypogene and supergene fluid events. Each resultant iron ore type has certain physical and chemical properties, as well as a relative economic value.

Iron Systems

Steffen Hagemann, Paul Duuring

22 June 2012

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Leaching of silica bands and concentration of magnetite in Archean BIF by hypogene fluids: Beebyn Fe ore deposit, Yilgarn Craton, Western Australia

The Beebyn magnetite-martite iron ore deposit in the Weld Range greenstone belt records an interesting series of hypogene alteration events. Simply put, primary silica bands are replaced by hypogene carbonate, which is then dissolved by later fluids, resulting in the concent...

Iron Systems

Steffen Hagemann, Paul Duuring

22 June 2012

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Use and Calibration of portable X-Ray fluorescence analysers: case studies from komatiite-hosted nickel-sulphide deposits of the Yilgarn Craton, Western Australia.

Portable X-Ray Fluorescence (pXRF) analysers represent very powerful tools for the exploration and mining industry. This simple, inexpensive and fast way of analysing cuttings and drill core has become widely used. However, it is essential to consider whether the precision and...

Magmatic Mineral Systems

Stefano Caruso, Steven J. Barnes,...

15 June 2012

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