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 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.展开更多
当玄武岩的岩浆在外壳的岩浆房间区分形成低密度的斜长石和其密度比围住外壳的岩石的大的剩余液体时，山岳一种粒状火成岩形成。在岩浆房间的地板上在原处使结晶生产一种粒状火成岩建筑群的斜长石和次要的辉石，和剩余液体向下移居了，...当玄武岩的岩浆在外壳的岩浆房间区分形成低密度的斜长石和其密度比围住外壳的岩石的大的剩余液体时，山岳一种粒状火成岩形成。在岩浆房间的地板上在原处使结晶生产一种粒状火成岩建筑群的斜长石和次要的辉石，和剩余液体向下移居了，最后团结作为稠密 Fe 富有堆积其中一些被移开到披风。这些运动被高温度便于在原生地大陆人外壳，因此地球历史上向这个时期解释大一种粒状火成岩山岳的限制。展开更多
The intrusions of the Panzhihua-Xichang（Panxi） region in southwest China have become well known in the past decade because they host large and rich magmatic oxide deposits that are mined for Fe,Ti and V.These intrus...The intrusions of the Panzhihua-Xichang（Panxi） region in southwest China have become well known in the past decade because they host large and rich magmatic oxide deposits that are mined for Fe,Ti and V.These intrusions form part of the Emeishan large igneous province（ELIP）,which is commonly believed to be the product of melting in a mantle plume.The ELIP was emplaced about 260 Ma ago,at the same time as the end-Guadalupian mass extinction.The investigation of the Panxi intrusions therefore provides information relevant to three broad areas of the earth sciences：（1）the petrogenesis of mafic magmas,展开更多
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" programGeologists from the Panzhihua mining company are thanked for their logistic support
文摘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.
基金supported by the M&Ms project of the French Agence Nationale de Recherche
文摘当玄武岩的岩浆在外壳的岩浆房间区分形成低密度的斜长石和其密度比围住外壳的岩石的大的剩余液体时，山岳一种粒状火成岩形成。在岩浆房间的地板上在原处使结晶生产一种粒状火成岩建筑群的斜长石和次要的辉石，和剩余液体向下移居了，最后团结作为稠密 Fe 富有堆积其中一些被移开到披风。这些运动被高温度便于在原生地大陆人外壳，因此地球历史上向这个时期解释大一种粒状火成岩山岳的限制。
文摘The intrusions of the Panzhihua-Xichang（Panxi） region in southwest China have become well known in the past decade because they host large and rich magmatic oxide deposits that are mined for Fe,Ti and V.These intrusions form part of the Emeishan large igneous province（ELIP）,which is commonly believed to be the product of melting in a mantle plume.The ELIP was emplaced about 260 Ma ago,at the same time as the end-Guadalupian mass extinction.The investigation of the Panxi intrusions therefore provides information relevant to three broad areas of the earth sciences：（1）the petrogenesis of mafic magmas,
