A series of crystallization experiments have been carried out by using natural Emeishan Ti-rich hydrous basalts as starting materials at a pressure of 0.5 GPa and temperatures of 800-1000 °C to constrain the origin of Fe-Ti-V oxide ore deposits. Our experimental results demonstrate that the sandwich-and trellis-type ilmenite lamellae in titanomagnetite of layered intrusions can be formed by the reaction of earlier crystallized ilmenite and the evolved parental magma. During evolution of paren- tal basaltic magma, the Fe-Ti oxide should be composed of titanomagnetite+ilmenite in the earlier stage, but changed to titanomagnetite+titanomagnetite-ilmenite intergrowth±ilmenite at the later stage. Accordingly, the Panzhihua Fe-Ti oxide ores, which are mainly composed of titanomagnetite, should be formed earlier than the adjacent gabbro, in which titanomagnetite-ilmenite intergrowth is the major form of the Fe-Ti oxide.

Junlong Yang;Chao Wang;Zhenmin Jin

State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China

地球科学学刊（英文版）

[1]Junlong Yang;Chao Wang;Zhenmin Jin-.Crystallization of Hydrous Ti-Rich Basaltic Magma and Its Implication for the Origin of Fe-Ti Oxide in Layered Intrusions of the Emeishan Large Igneous Province)[J].地球科学学刊（英文版）,2022(02):507-512

Basaltic,Intrusions,paren,titanomagnetite+ilmenite,titanomagnetite+titanomagnetite

Crystallization,Hydrous,Ti,Rich,Magma,Its,Implication,Origin,Oxide,Layered,Emeishan,Large,Igneous,Province,series,crystallization,experiments,have,been,carried,out,by,using,natural,rich,hydrous,basalts,starting,materials,pressure,GPa,temperatures,constrain,origin,oxide,deposits,Our,experimental,results,demonstrate,that,sandwich,trellis,type,lamellae,layered,intrusions,can,formed,reaction,earlier,crystallized,evolved,parental,magma,During,evolution,basaltic,should,composed,stage,but,changed,intergrowth,later,Accordingly,Panzhihua,ores,which,mainly,than,adjacent,gabbro,major

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