Inversion of an anomaly due to multiple magnetizations: An example from the Coompana survey, South Australia

Foss, Clive; Reed, Gary; Keeping, Tim; Wise, Tom; Dutch, Rian

doi:10.1190/segam2016-13972845.1

Cited by 2 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The inversion model reproduces all of the major features of the observed anomaly, but not all of the detail. In particular there are several local features (some of which may possibly be feeder zones), but those require dedicated local inversions because they contribute such a small proportion of the anomaly that they are poorly constrained in a full-anomaly inversion (Foss et al, 2016). The gravity inversion model and the inner sheet of the magnetic field inversion model overlap quite closely, and the gravity anomaly can be well matched by assigning a suitable density to the inner sheet of the magnetic field inversion model.…”

Section: Anomaly Cmentioning

confidence: 99%

Combined gravity and magnetic studies of satellite bodies associated with the giant Coompana negative magnetic anomaly in South Australia

Foss

Heath²,

Wise³

et al. 2018

ASEG Extended Abstracts

Self Cite

View full text Add to dashboard Cite

We present inversion models derived for 3 gravity and magnetic anomaly pairs. These anomalies are associated with the much larger (>50 km diameter) Coompana negative magnetic anomaly, and are due to high density and strong, reverse remanent magnetization. Recent drilling has revealed gabbroic rocks are likely to be the principal causes of these anomalies. In some cases the gravity and magnetic anomaly models are quite similar to each other, and from these we mostly gain estimates of the magnetization to density relationships. In particular, these cases confirm that the magnetization direction estimates derived from inversion of the magnetic field data are robust. In other cases the gravity and magnetic inversion models differ significantly, revealing that the simple models derived from inversion of either dataset alone do not well represent what is clearly a more complex geology. The main advantage from the combined gravity and magnetic data is to compare the information each separately provides. We hope to upgrade our inversion models with physical property values measured on core recovered from the recently drilling campaign. At that time, and in conjunction with petrological studies, we should be able to introduce more geological interpretation and guidance to modify and transform the initial inversion results which are primarily geophysical to models that are more geological.

show abstract

Section: Anomaly Cmentioning

confidence: 99%

Combined gravity and magnetic studies of satellite bodies associated with the giant Coompana negative magnetic anomaly in South Australia

Foss

Heath²,

Wise³

et al. 2018

ASEG Extended Abstracts

Self Cite

View full text Add to dashboard Cite

show abstract

Ring and Dome Features, Possible and Probable Impact Structures

Glikson

Pirajno

2018

Asteroids Impacts, Crustal Evolution and Related Mineral Systems With Special Reference to Australia

View full text Add to dashboard Cite

The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

show abstract

Inversion of an anomaly due to multiple magnetizations: An example from the Coompana survey, South Australia

Cited by 2 publications

References 5 publications

Combined gravity and magnetic studies of satellite bodies associated with the giant Coompana negative magnetic anomaly in South Australia

Combined gravity and magnetic studies of satellite bodies associated with the giant Coompana negative magnetic anomaly in South Australia

Ring and Dome Features, Possible and Probable Impact Structures

Contact Info

Product

Resources

About