首页|Fuzzy c-mean (FCM) integration of geophysical data from an iron-oxide copper gold (IOCG) deposit under thick cover

Fuzzy c-mean (FCM) integration of geophysical data from an iron-oxide copper gold (IOCG) deposit under thick cover

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  • Taylor & Francis
Geophysical methods depend on a range of physical and chemical mechanisms, and eachmethod has different sensitivities and resolution of Earth parameters, and over different scalelengths. Additionally, such geophysical methods will also have their own statistical characteristics.Thus, it is a significant challenge to combine different methods through a single inversionframework. Rather than attempting to find an optimal and single model for different geophysicalresponses, an alternative approach is to use FCM clustering to identify clusters of parametersfrom two or more different geophysical data sets or models that have similar statistical properties.In this paper, we apply the FCM approach to integrate data and model sets for an array of100 broadband magnetotelluric (MT) and 100 passive seismic receivers spaced 1 kmapart on a 10by 10 grid above the Vulcan IOCG prospect in the Olympic Cu–Au Province, southern Australia.The challenge for exploration of the Vulcan prospect is that it lies beneath 750mof regolith sedimentarycover, no single geophysical method provides a unique characterization of the depositgeometry, and drilling is very expensive. Fuzzy c-mean cluster analyses are undertaken in 2D forgravity data and shear-wave velocity model data for basement depths beneath cover and in 3Dfor shear-wave velocity and electrical resistivity model data. Fuzzy c-mean clustering is shownto provide a simple and efficient method of integrating different geophysical measurements toproduce a geological framework that can be verified with drilling information.

Fuzzy c-mean clusteringFCMmagnetotelluricsambient noise tomographygravityIOCG

Simon Carter、Graham Heinson、Ben Kay、Goran Boren、Ying Liu、Gerrit Olivier、Tim Jones、Rebecca Abel、Lisa Vella、Louise McAllister

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School of Physics, Chemistry and Earth Sciences, University of Adelaide, Adelaide, Australia||School of Resources and EnvironmentalEngineering,Wuhan University of Science and Technology,Wuhan, People’s Republic of China

School of Physics, Chemistry and Earth Sciences, University of Adelaide, Adelaide, Australia

School of Physics, Chemistry and Earth Sciences, University of Adelaide, Adelaide, Australia||School of Geophysics and Geomatics,China University of Geosciences,Wuhan, People’s Republic of China

Centre for Ore Deposits and Earth Sciences, University of Tasmania,Tasmania, Australia||Fleet Space Technologies, Adelaide, Australia

Fleet Space Technologies, Adelaide, Australia

Fortescue Metals Group, Perth, Australia

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2024

10.1080/08123985.2024.2391571

Exploration geophysics

Exploration geophysics

EISCI
ISSN：0812-3985
年,卷(期)：2024.55(6)
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