中文摘要:含矿岩体受南北向深断裂控制，为辉长岩和辉长岩一辉石岩—橄辉岩两种类型。岩体韵律结构发育，由下而上基性程度不断降低。出于岩浆脉动侵入，韵律结构具多旋回性。钒钛磁铁矿矿层赋存于岩体中下部或韵律旋回底部，自下而上依次发育嵌晶结构、镶嵌结构和海绵陨铁结构。岩体的Fe2O3/FeO比值很高。根据地质构造背景和氧逸度估算，岩体在熔融状态时处于氧分压较高的环境之中。熔融实验表明铁镰氧化物熔点高，结晶早。但是在相当大的温度范围， 铁钛氧化物与造岩矿物同时结晶。矿床中单斜辉石与钛磁铁矿中的Sc辉石与钛铁矿中的MnO有良好的协变关系。攀西地区钒钛磁铁矿矿床不是岩浆晚期矿床，而是岩浆早期矿床。
Abstract:The layered rock masses distributed in North-South direction are controlled by deep faults and can be divided into two series, i. e., gabbro and gabbropyroxenite-olivine pyroxenite, with the isotopic age being 500 Ma or so. In the rock masses there are well-developed structures of rhythmic stratifications. As a result of pulsating intrusion of the new magma, rhythmic stratifications show apparent multicyclic characteristics. In the same rhythm the basicity of the rock gradually decreases from the lower part to the upper. Ore layers are concentrated in the lower part of the rock masses or at the bottom of a rhythmic cycle. Poikilitic, mosaic and spongy structures are found successively from the bottom of a rhythmic cycle upwards. Good correlations between Sc content of clinopyroxene and that of Ti-magnetite, as well as between MnO in clinopyroxene and that in ilmenite suggest-that rock-forming minerals crystallized simultaneously with Fe-Ti oxides in approximatey equilibrium conditions. The high Fe2O3/FeO ratio and the occurrence of the rock masses and oxygen fugacity calculations show that when melting the rock masses were in an environment of high oxygen fugacity, which was favorable for the crystallzation of Fe-Ti oxides at an early stage. The melting experiments indicate that solidus temperature of rock mass is about 1095℃, liquids temperature is 1210℃, the upper temperature limit and the initial melting temperature of the Fe-Ti oxides are 1205-1210℃ and around 1095℃ respective]y, implying their crystallization at the earliest stage. The rock-forming minerals and Fe-Ti oxides crystallize together in a rather wide range of temperateture. The telnperature and oxygen fugacities calculated from Fe-Ti oxides correspond to state parameters. Freequilibrium under solidus rather than to physic cochemical conditions of magmatic fractional crystallization. The V-Ti magnetite deposits in Panzhibua-Xichang area are early magmatic deposits instead of late magmatic ones.
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卢记仁，张承信，张光弟，顾光先，刘王书，黄与能.1988.攀西地区钒钛磁铁矿矿床的成因类型[J].矿床地质,7(1):1~13.1988.Genetic type of V-Ti magnetite deposits in Panzhihua-Xichang area[J].Mineral Deposits7(1):1~13
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