The purpose of this study is to show the patterns of distribution of disseminated sulfide in layered rocks based on the numerous geochemical and mineralogical data obtained for eight boreholes of the Norilsk intrusion (southern part of the Norilsk 1 deposit). There is a common trend of sulfide liquid fractionation in the Main Ore Horizon, which is composed of picritic and taxite (or olivine) gabbro-dolerites: the Ni/Cu in both rock types decreases down all sections, indicating an increase in the degree of fractionation of the sulfide liquid from top to bottom. On the contrary, the Ni/Fe ratios in pentlandite increase in this direction due to an increase in sulfur fugacity. However, picrite and taxite/olivine gabbro-dolerites are very distinctly separated by Ni/Cu values: these values are >1 in picritic gabbro-dolerite while they are always <1 in taxite/olivine gabbro-dolerite. These rock types are distinguished by sulfide assemblages. The first includes troilite, Fe-rich pentlandite, chalcopyrite, cubanite, talnahite, bornite and copper (low sulfur association); the second one is composed of monoclinic pyrrhotite, chalcopyrite, Ni-rich pentlandite and pyrite (high sulfur association). A two-stage magma injection with different ore specializations is supposed for picritic and taxite/olivine gabbro-dolerites.

中文翻译：

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Norilsk 1侵入带分化岩石的地球化学特征和矿物协会

这项研究的目的是基于从Norilsk侵入体（Norilsk 1矿床的南部）的八个钻孔获得的大量地球化学和矿物学数据，显示层状岩石中弥散性硫化物的分布模式。在主矿层中，硫化物液体的分馏有一个共同的趋势，它是由pic石和紫杉岩（或橄榄石）辉长岩组成的：两种岩石类型中的Ni / Cu沿所有断面都下降，这表明矿化程度增加了。从上到下分馏硫化物液体。相反，由于硫逸度的增加，方解石中的Ni / Fe比沿该方向增加。但是，镍/铜的值将pic石和紫杉土/橄榄辉长岩-长石截然不同：在pic石辉长岩-长石中，这些值> 1，而它们总是< 在紫杉/橄榄石辉长岩中占1。这些岩石类型以硫化物组合为特征。第一类包括三方沸石，富铁的方铁矿，黄铜矿，堇青石，钽铁矿，褐铁矿和铜（低硫缔合）；第二种是由单斜晶的黄铁矿，黄铜矿，富镍的膨​​润土和黄铁矿（高硫缔合）组成。岩溶和滑石/橄榄石辉长岩-白云母的两阶段岩浆注入具有不同的矿石专长。