Alteration Fractural System and Orebody Locating in the Linglong Gold Field
The Linglong granite occurs over a large area in the Linglong gold field,and its deformation at differ-ent crustal depths varies during metallogenesis.The rocks occurring in the shallow crust mainly show character-istics of brittle deformation.The fracture network within the main fault zone formed a tectonic system that con-trols the migration,precipitation,enrichment,and distribution of minerals.Meanwhile,the center of the tec-tonic system served as the main space for storing gold ore bodies.The deformation of rocks farther from the fault center gradually weakens,transitioning from fractured rocks to those with fewer reticulated fissures.These prob-lems result in resource shortages in the gold mine.In this study,to accurately and effectively predict the posi-tions of hidden gold orebodies in the Linglong gold field,we analyzed the correlations between the width of the typical alteration fracture network vein zone and the spatial positioning of the orebody.This analysis is based on dissecting the rock deformation mechanism and the corresponding relationship between rock deformation and tec-tonic development.Structural and statistical analyses of alteration fractures indicate that the density parameters of these fractures in the Linglong gold field can generally be used to determine the structural position of the ob-served rocks within the tectonic zones.This allows for the reference of deformation characteristics of rocks in hidden areas and the establishment of a spatial distribution model ore bodies and an alteration fracture system during mineralization.Moreover,this study can estimate the intensity of mineralization,as well as the size and occurrence of the ore body.Therefore,the degree of development of tectonic alteration fractures is a key indica-tor of geological information for deep prospecting and spatial positioning of orebodies.In addition,measuring and analyzing the density of alteration fractures in the structural mineralization zone,as well as understanding the distribution patterns of this density,can effectively locate the position of hidden ore bodies.Furthermore,this study enables estimates of the development degree and location of ore bodies,thereby achieving the goals of positioning and predicting these ore bodies.
brittle deformationfracture densityorebody locatingLinglong gold field
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