WESTERN AUSTRALIA PALAEOMAGNETIC AND ROCK-MAGNETIC FACILITY
The Western Australia Palaeomagnetic and Rock-magnetic Facility, recently upgraded and relocated to Curtin University’s Bentley campus, is a national research infrastructure with the latest upgrade co-funded by the Australian Research Council and collaborating institutions including Curtin University, the University of Western Australia (UWA), the Australian National University, Macquarie University and University of Queensland. The facility was established at UWA in 1990 by CCFS CI Z.X. Li, and has been progressively upgraded over the years.
The latest upgrade includes the construction of a magnetically shielded room in mid-2015 by Dr Gary Scott’s team, which provides a laboratory space with ambient magnetic fields less than 0.5% of the local geomagnetic field. Within this shielded room we now have a new 2G 755 superconducting rock magnetometer with a vertical Model 855 automated sample handler (the RAPID system) and other accessories attached to it (automated AF demagnetiser, susceptibility meter, etc.). The RAPID system, the first and only one in Australia, was installed and commissioned in February 2017, and has been used by multi-institutional users to collect data since. Other systems now operating inside the shielded room include an AGICO JR-6A spinner magnetometer and ASC TD-48SC and MAGNETIC MEASUREMENTS thermal demagnetisers. The AGICO MFK-1FA Kappabridge was relocated to the new Curtin facility from UWA in 2017, and the Petersen Instruments Variable Field Translation Balance (VFTB) along with the remainder of minor items in the UWA lab will all be co-located within the Curtin facility in early 2018. Arrangements have been made to add the temperature-susceptibility apparatus to the Kappabridge and to upgrade the VFTB system, both expected to be completed in mid-2018. We are planning to conduct a national workshop toward the end of 2018 on palaeomagnetism, rock magnetism and applications to tectonics, palaeoclimate research, and Earth resource exploration, and will include a training session on the operation of instruments within the Curtin facility.
The new purchases represent a major enhancement to the productivity and capabilities of the facility. Apparatus which is now available in the facility include:
- a 2G 755 superconducting rock magnetometer with a vertical Model 855 automated sample handler (the RAPID system) and other accessories (including; AF coils, susceptibility meter, and ARM system),
- a second 2G 755 cryogenic magnetometer upgraded to a 4K DC SQUID system (with a recent minor upgrade carried out by 2G Enterprises, including the repair of the lightning-damaged cold head; expected to be recommissioned during 2018),
- an AGICO JR-6A spinner magnetometer,
- 1x MMTD80, 2x MMTD18 and a TD-48-SC thermal demagnetiser,
- a Petersen Instruments Variable Field Translation Balance (VFTB),
- an AGICO MFK-1FA kappabridge with K-T capacity, and
- a MAGNETIC MEASUREMENTS MMPM5 pulse magnetiser.
The facility supports a wide range of research topics, including reconstruction of global palaeogeography (the configuration and drifting history of continents) through Earth’s history, studying the evolving geomagnetic field (e.g., palaeointensity) through time, analyses of regional and local structures and tectonic histories, dating sedimentary rocks and thermal/chemical (e.g. mineralisation) events, studying past climate changes, and orienting rock cores from drill-holes.