Structure of the Panzhihua intrusion and its Fe-Ti-V deposit,China  

作　　者：Arnaud Pecher Nicholas Arndt Alexander Jean Arthur Bauville Clement Ganino Charlotte Athurion 

机构地区：[1]ISTerre,Universite Joseph Fourier de Grenoble,CNRS,1381 rue de la Piscine,38400 Saint Martin d'Heres,France [2]Geoazur,Universite de Nice-Sophia Antipolis,CNRS/IRD,Parc Valrose,06108 Nice,France

出　　处：《Geoscience Frontiers》2013年第5期571-581,共11页地学前缘（英文版）

基　　金：supported by a Famous overseas professor project MS2011ZGDZ[BJ]019 through China University of Geosciences (Beijing)and by the USA NSF "Continental Geodynamics" program;Geologists from the Panzhihua mining company are thanked for their logistic support

摘　　要：The Panzhihua intrusion in southwest China is part of the Emeishan large igneous province and host of a large Fe-Ti-V ore deposit.In previous interpretations it was considered to be a layered,differentiated sill with the ore deposits at its base.New structural and petrological data suggest instead that the intrusion has an open S-shape,with two near-concordant segments joined by a discordant dyke-like segment. During emplacement of the main intrusion,multiple generations of mafic dykes invaded carbonate wall rocks,producing a large contact aureole.In the central segment,magmatic layering is oriented oblique to the walls of the intrusion.This layering cannot have formed by crystal settling or in-situ growth on the floor of the intrusion;instead we propose that it resulted from inward solidification of multiple,individually operating,convection cells.Ore formation was triggered by interaction of magma with carbonate wall rocks.The Panzhihua intrusion in southwest China is part of the Emeishan large igneous province and host of a large Fe-Ti-V ore deposit.In previous interpretations it was considered to be a layered,differentiated sill with the ore deposits at its base.New structural and petrological data suggest instead that the intrusion has an open S-shape,with two near-concordant segments joined by a discordant dyke-like segment. During emplacement of the main intrusion,multiple generations of mafic dykes invaded carbonate wall rocks,producing a large contact aureole.In the central segment,magmatic layering is oriented oblique to the walls of the intrusion.This layering cannot have formed by crystal settling or in-situ growth on the floor of the intrusion;instead we propose that it resulted from inward solidification of multiple,individually operating,convection cells.Ore formation was triggered by interaction of magma with carbonate wall rocks.

关 键 词：Fe-Ti-V deposit INTRUSION STRUCTURE SKARN Tectonics 

分 类 号：P617[天文地球—矿床学]