A web-based utility to highlight the role of remanent magnetization in Australian magnetic field data

Summary

Magnetic field data forms the most detailed and comprehensive geophysical coverage of Australia but at present there are challenges in reliable interpretation of that data. One major concern is the recognition and correct treatment of remanent magnetization which can result in mislocation of drill targets. To both reduce hazards of incorrectly interpreting magnetic field data and also to derive new geological information we have developed a web-delivered database of Australian magnetic anomalies recognised as being at least in part due to remanent magnetization. The database is linked with databases of model studies, magnetic moment analyses (MMA) and palaeomagnetic and rock magnetic investigations. These linked databases presented in the context of magnetic field imagery provide geoscientists with a rapid means of recognising the expression of remanent magnetization and of accessing information about that magnetization to assist in their interpretations. The databases have been lightly populated and can be accessed with a web utility. Community involvement is sought to further populate the databases with information currently distributed through geological survey, company and academic records.

Key words::

• magnetic anomaly
• remanent magnetization
• rock magnetism
• palaeomagnetism
• database