Full Tensor Magnetic Gradiometry Processing and Interpretation Developments

Fitzgerald, Des; Argast, D.; Paterson, Rod; Holstein, H.

doi:10.3997/2214-4609-pdb.241.fitzgerald_paper3

Cited by 9 publications

(7 citation statements)

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“…Efficient use of the extra information provided by gradient tensor surveys will require creative new processing and interpretation. Contributions to this effort include Pedersen and Rasmussen (1990), Schmidt et al (2004), Schmidt (2006), Fitzgerald and Holstein (2006), Heath (2007), Clark et al (2009), Fitzgerald et al, (2009, 2010, Beiki et al (2011) and Holstein et al (2011). In this paper, I outline several new approaches to interpretation of gradient tensor data and present preliminary analysis of the well-known Mount Leyshon anomaly in the Charters Towers area, Queensland.…”

Section: Discussionmentioning

confidence: 99%

New Methods for Interpretation of Magnetic Gradient Tensor Data

Clark

2012

ASEG Extended Abstracts

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Section: Discussionmentioning

confidence: 99%

New Methods for Interpretation of Magnetic Gradient Tensor Data

Clark

2012

ASEG Extended Abstracts

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“…However, all of these methods do ignore again the MGT properties and thus may corrupt the data. Using quaternions [144,145] allows interpolation of the tensor as a whole onto a regular grid while preserving its properties in the so called SLERP (spherical linear interpolation) algorithm [146].…”

Section: Data Processing Inversion and Interpretationmentioning

confidence: 99%

Superconducting sensors and methods in geophysical applications

Stolz

Schmelz

Zakosarenko³

et al. 2021

Supercond. Sci. Technol.

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More than 50 years ago superconducting quantum interference devices (SQUIDs) were invented. Since then many applications opened up. Already in a 1980 workshop (Weinstock and Overton 1981 SQUID Applications to Geophysics (Society of Exploration Geophysicists)) the application of SQUIDs in geosciences was reviewed. The fabrication and cooling technologies, electronics and other SQUID system components underwent significant improvement within the past years. Thus, SQUIDs are today better suited, more sensitive and effective as well as robust and reliable in operation for geophysical measurements. Many successful application examples, demonstrations and discoveries of mineral resources have been made using them in laboratory devices for investigation of magnetic properties, magnetic exploration, transient electromagnetics and for superconducting gravimeters as well as gravity gradiometers. Therefore, this article intends to review the past, present, and some future aspects of SQUIDs in geo-scientific applications such as e.g. mineral exploration. Since this field is still very active and quite a number of developments are ongoing, this review cannot be comprehensive.

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“…Superconducting quantum interference devices allow measurements of the magnetic tensor with sensitivity on the order of 10 −4 nT.m −1 (Schmidt and Clark 1998;Stolz et al 2006;Fitzgerald et al 2010). Such magnetometers, using superconducting properties, present some difficulties, in particular the complex logistics for cryogens and associated systems.…”

Section: A G N E T I C G R a D I O M E T R Y A N D T E N S O R M E mentioning

confidence: 99%

Scalar, vector, tensor magnetic anomalies: measurement or computation?

Munschy

Fleury

2011

Geophysical Prospecting

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A B S T R A C TMagnetic surveys for geophysical interpretation will most usefully furnish estimates of the three components of the magnetic field vector. We review methods for obtaining this information based on scalar and tensor magnetic field measurements and point out the advantages of fluxgate vector measurements. Fluxgate vector magnetometers can be powerful instruments in magnetic mapping. The main problems in using fluxgate magnetometers arise from calibration errors and drift but these can be overcome using a quick and simple method of calibration. This method also has the advantage of compensating permanent and induced magnetic fields generated by the airplane. This is illustrated by a new aeromagnetic survey flown in the Vosges area (France). Measurement accuracy is shown to be similar to that obtained with scalar magnetometers. We take advantage of this accuracy to calculate in the Fourier domain other magnetic functions from the total-field anomaly, in particular, the magnetic gradient tensor is obtained without using any superconducting quantum devices. A similar approach is used to introduce a new magnetic anomaly tensor that is the equivalent of the pseudo-gravity tensor. Maps presented in the last sections serve as an example to illustrate the various functions, the goal of the paper being to obtain magnetic vector data from the observations without first postulating the detailed nature of the sources.

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Full Tensor Magnetic Gradiometry Processing and Interpretation Developments

Cited by 9 publications

References 0 publications

New Methods for Interpretation of Magnetic Gradient Tensor Data

New Methods for Interpretation of Magnetic Gradient Tensor Data

Superconducting sensors and methods in geophysical applications

Scalar, vector, tensor magnetic anomalies: measurement or computation?

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