(GHF)
GEOHISTORY FACILITY
GHF houses state-of-the-art laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) equipment, in addition to a low temperature thermochronology laboratory. In late 2015 a Nu Plasma II multi-collector will be integrated into the facility to facilitate split stream analysis. The instruments are located in a modern, purpose-built space and we provide collaborative and commercial access to academia, government and industry.


WE SPECIALISE IN GEOCHRONOLOGY, THERMOCHRONOLOGY, TRACE ELEMENT AND ISOTOPIC ANALYSIS.

TECHNIQUES

In situ U-Pb geochronology and thermochronology

Automated ablation of large numbers of samples (up to 750 unknowns in one day)

Trace element characterization and 2-D trace element/age mapping

High-spatial resolution (4 um) linear or curvilnear linescans (rotating slit)

Flexible mounting capability (thin section, epoxy rounds or irregular shapes)

Offline point location and ablation sequencing

Software coordination and overlay of optical, SEM, CL images

Direct ablation of targets identified by TIMA analysis

Import and registration of X-Y coordinates from external sources

LA-ICPMS AND RESOCHRON

The LA-ICPMS comprises a Resonetics S-155-LR 193nm excimer laser ablation system coupled to an Agilent 7700x quadrupole ICPMS. The Excimer laser is also coupled to a RESOchron helium analysis line for in situ (U-Th-Sm)/He, U-Pb and trace element analysis of single crystals.

ALPHACHRON

We also have a separate Alphachron helium line with a diode laser and furnace in order to facilitate conventional (U-Th)/He dating on single mineral crystals and larger samples.

NU PLASMA II MULTI-COLLECTOR ICPMS

To be installed in late 2015

APPLICATIONS

LA-ICPMS

LA-ICPMS is commonly applied to: the determination of the trace element composition of solid materials (rock forming minerals, fused rock powder, glasses, fluid inclusions, archaeological artefacts, ceramics, plastics, and biological materials like otoliths, teeth, bones, shells), the in situ dating of a variety of minerals, isotopic analysis, 2D elemental mapping, and the determination of mineral-melt partition coefficients.

Thermochronology

Thermochronology can be used to determine: thermal histories for tectonic and landscape evolution studies, the age of young volcanic rocks, the thermal evolution of hydrocarbon source rocks in sedimentary basins, orogenic uplift/denudation rates in metallogenic regions (landscape evolution), palaeoclimate conditions at the time of channel iron deposit genesis, relative fault displacement (i.e., to find offset ore deposits), the parameters required for inverse modeling of the thermal history of hydrothermal ore deposits, the prospectivity of a potential geothermal reservoirs, the thermal fluid flow history of prospective nuclear repository sites and as a new tool for diamond explorers.

ELEMENTAL MAPPING OF OTOLITHS

ATOMIC FORCE MICROSCOPY IMAGE OF A LASER ABLATION PIT

TRACE ELEMENT MAPPING

LABORATORY ANALYSIS

FEATURED PROJECTS

SEE MORE
Assoc. Prof. Noreen Evans
GHF
Facility Leader
Ph: +61 8 9266 2393
Mr. Brad McDonald
GHF
Senior Laboratory Technician
Ph: +61 8 9266 2461
Dr. Martin Danisik
GHF
Senior Research Fellow
Ph: +61 8 9266 7625