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引言怀特派恩矿区位于密执安上半岛西部,是一典型的含铜页岩矿化实例(Ensign等,1968),也是可能的前寒武纪石油的典型产地(Eglington等,1964;Meinschein等,1964;Hoering,1976)。最近,在研究穿过铜矿带的方解石充填脉时,我们发现了大量的捕获于脉方解石晶体中的石油包裹体。本文将描述这些古油滴,以及它们与矿脉中硫化物的关系,并讨论石油在主要的铜矿化阶段的作用。
INTRODUCTION The White Pine Mine, located in the western Upper Peninsula of Michigan, is a classic example of copper-bearing shale mineralization (Ensign et al., 1968) and is also a likely source for pre-Cambrian oil (Eglington et al., 1964; Meinschein et al. , 1964; Hoering, 1976). Recently, when studying the filling of calcite through the copper belt, we found a large amount of oil inclusions trapped in vein calcite crystals. This article will describe these paleo-oil droplets and their relationship to sulphides in the veins and discuss the role of petroleum in the major copper mineralization stages.