Geologoical And Geochemical Characteristics Of Antuoling Molybdenum Deposit In Hebei Province

Through transmagmatic fluids(TMFT)theory,integrated use of structural geology,correlation analysis,deposit geochemistry and mathematical statistics,,combined with geological data,analyses the relationship between the magmatic activity and mineralization of Antuoling molybdenum ore,summaries metallogenic regularities and prospecting criteria,reached the following conclusions:Antuoling mine fault structure is very development,most are normal fault,five fault that different towards constitutes the grid of fault system of Antuoling mine.most joints are shear joints,basically is to Antuoling porphyry center gradually outward simplicity,the relative direction of movement of the shear joints is mainly by the vertical movement,implied that the mining center locates at the vicinity of Antuoling porphyry.The core of antuoling porphyry is quartz monzonite porphyry,the outer ring for the granodiorite porphyry.They are the product of magma emplacement at the same time.Local lamprophyre dikes intrusions,constitutes a complex form of small double-porphyry.Antuoling molybdenum(copper)mine is a blind ore body,ore body situates inner of granitic diorite porphyry or the inner and outer belt of granitic diorite porphyry and biotite amphibolite plagioclase gneiss.The orebody lies as multilayer and heavy enrichment ribbon.Mineralized zone along the rock contact zone as a strip or ring plane;orebody segmented enrichment profile.The south and east of the ore body with a large industrial value in Antuoling top wall rock on the plate part to the east side of volts.The Antuoling mine wall rock alteration widespread and strongly aiteration degree of the complexity of the alteration types,which has wide distribution,mainly around the porphyry body into a ring distribution,multi-stage and very complex.Alteration exsits each stage of the mineralization,silicification and K-feldspr and sericite alteration are closely related to molybdenum mineralization.The strength of the alteration and molybdenum ore body grade level of positive correlation,that is,stronger alteration corresponds positive to the grade of molybdenum ore body.The Antuoling porphyry sample have the characters like high-K calc-alkaline,partial aluminum to peraluminous,alkali-rich,poor in magnesium,low calcium and potassium higher than sodium.Granodiorite porphyry and quartz monzonite porphyry which comrposited the Antuoling porphyry has the characteristics of adakite,Antuoling porphyry is no significant negative Eu anomaly that imply there has at least the thickness of 50km thick continental crust under it.Within this area,prospecting direction is very dear:granodiorite porphy ry is positively to molybdenum mineralization;The ore body is more favorably occur on the under of propyl itization rocks,potassium and-silicified zone is occurrence space of orebody;the top of concealed biotite granodiorite body is the main position of main orebody;The intersection part of east-western and west-north tectonic is concealed blasting breccia pipe location and district-based main prospecting target.