An Australian database of magnetic anomalies recognised as being due in large part to remanent magnetization  

Authors / CoAuthors

Foss, C. | Milligan, P. | Schmidt, P. | Musgrave, R. | Warren, P.

Abstract

The presence of remanent magnetization must be correctly addressed in the inversion and interpretation of magnetic field data. Better knowledge and understanding of the influence of remanent magnetization will allow improved design of boreholes to test magnetic targets, thus reducing the risk of expensive misses, and also provide new geological insights regarding the distribution of geological events (including mineralization events) which have left a magnetic signature. To assist in this objective, we have designed a database for specification of magnetic field anomalies due substantially to remanent magnetization, and have initially populated this web-delivered database with just over 200 examples from across Australia. A map-based interface allows the user to determine which if any anomalies in an area are interpreted as due in substantial part to remanent magnetization, to recover the associated estimate of resultant magnetization direction, and in some cases to download models of the distribution of magnetization. We are presently researching the application of automated methods to recover magnetization estimates, which will provide a much greater number of estimates, albeit of lower reliability. We envisage a possible 'wiki'-like development of the database, so that once more fully established, it could grow by web upload of contributions from industry, government and academic geophysicists.

Product Type

nonGeographicDataset

eCat Id

76755

Contact for the resource

Keywords

• External Publication

( Theme )

• magnetics

Australian and New Zealand Standard Research Classification (ANZSRC)

• Geophysics

• Published_Internal

Publication Date

2013-01-01T00:00:00

Creation Date

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - restricted

Use - license

Status

Purpose

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

Collaborative project with CSIRO.

Parent Information

Extents

Reference System

Spatial Resolution

Service Information

Associations

Downloads and Links

Source Information

Total magnetic anomaly data of Australia All Australia