The past two decades have seen a rapid adoption of artificial intelligence methods applied to mineral exploration.More recently,the easier acquisition of some types of data has inspired a broad literature that has examined many machine learning and modelling techniques that combine exploration criteria,or'features',to generate predictions for mineral prospectivity.Central to the design of prospectivity mod-els is a'mineral system',a conceptual model describing the key geological elements that control the tim-ing and location of economic mineralisation.The mineral systems model defines what constitutes a training set,which features represent geological evidence of mineralisation,how features are engineered and what modelling methods are used.Mineral systems are knowledge-driven conceptual models,thus all parameter choices are subject to human biases and opinion so alternative models are possible.However,the effect of alternative mineral systems models on prospectivity is rarely compared despite the potential to heavily influence final predictions.In this study,we focus on the effect of conceptual uncertainty on Fe ore prospectivity models in the Hamersley region,Western Australia.Four important considerations are tested.(1)Five different supergene and hypogene conceptual mineral systems models guide the inputs for five forest-based classification prospectivity models model.(2)To represent concep-tual uncertainty,the predictions are then combined for prospectivity model comparison.(3)Representation of three-dimensional objects as two-dimensional features are tested to address com-monly ignored thickness of geological units.(4)The training dataset is composed of known economic mineralisation sites(deposits)as'positive'examples,and exploration drilling data providing'negative'sampling locations.Each of the spatial predictions are assessed using independent performance metrics common to Al-based classification methods and subjected to geological plausibility testing.We find that different conceptual mineral systems produce significantly different spatial predictions,thus conceptual uncertainty must be recognised.A benefit to recognising and modelling different conceptual models is that robust and geologically plausible predictions can be made that may guide mineral discovery.

Mark D Lindsay;Agnieszka M.Piechocka;Mark W Jessell;Richard Scalzo;Jeremie Giraud;Guillaume Pirot;Edward Cripps

Commonwealth Scientific and Industrial Research Organisation,Mineral Resources Australian Resources Research Centre,WA 6151,Australia;Mineral Exploration Cooperative Research Centre,Centre for Exploration Targeting,School of Earth Sciences,The University of Western Australia,Perth,WA 6009,Australia;ARC Centre for Data Analytics for Resources and Environments(DARE),Perth and Sydney,Australia;University of Sydney,School of Mathematics and Statistics,Sydney,Australia;Université de Lorraine,GeoRessources,CNRS,54000 Nancy,France;The University of Western Australia,Department of Mathematics and Statistics,Perth,Australia

地学前缘（英文版）

[1]Mark D Lindsay;Agnieszka M.Piechocka;Mark W Jessell;Richard Scalzo;Jeremie Giraud;Guillaume Pirot;Edward Cripps-.Assessing the impact of conceptual mineral systems uncertainty on prospectivity predictions)[J].地学前缘（英文版）,2022(06):182-207

prospectivity,tim,Hamersley,hypogene,recognising

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