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拉比特湖铀矿床产于下元古代变质沉积岩中,沉积岩位于主要不整合面之下,上覆有中元古代砂岩。在约1800百万年前的赫德森造山运动期间,沉积岩发生变形和变质。在赫德森造山带发生准平原作用后,地表风化生成各种厚度的多孔和透水浮土,其后浮土层为砂岩覆盖并为逆断层切割。原生铀矿化呈块状和胶状沥青铀矿,生成年龄约1000百万年前,与赫德森造山运动无关。矿石矿物共生关系简单,只有极少数硫化物,如黄铁矿、白铁矿和黄铜矿,与沥青铀矿紧密共生。矿石生成过程推测如下:含铀溶液进入一个构造位置高的强烈角砾岩化和蚀变的钙质变质沉积岩断块。沥青铀矿沉积于破裂面、晶簇和孔洞中。方解石、块状和自形石英以及自形白云石敷于沥青铀矿之上,并部分地防止沥青铀矿淋滤。矿体其他部位的一些沥青铀矿在不同时期被淋滤掉或重新沉淀。蚀变作用和铀矿成矿作用局限于地表,在不整合面下,延伸范围不超过300—400尺。大部分证据表明,拉比特湖铀矿床是浅成的,后期烟灰状沥青铀矿和稀少的铀石被淋滤并重新沉淀。六价铀矿物,如硅钙铀矿、硅镁铀矿和黄硅钾铀矿只靠近地表产出。
The Rabbit Lake uranium deposit was produced in the Lower Paleogene metamorphic sedimentary rocks, which are located below the main unconformity and covered with Mesoproterozoic sandstone. Sedimentary rocks deform and deteriorate during the Hudson orogen about 1800 million years ago. After the quasi-plains effect on the Hudson orogen, the surface weathering produces porous and permeable floats of various thicknesses, followed by sandstone cover and reverse fault cutting. Primary uranium mineralization is massive and colloidal bitumen uranium, dating back to about 1,000 million years ago, unrelated to the Hudson orogeny. Ore minerals symbiotic relationship is simple, only a very small number of sulfides, such as pyrite, white iron ore and chalcopyrite, and bitumen uranium mine closely together. The ore formation process is presumed to be as follows: The uranium-containing solution enters a strongly brecciated and altered calcareous metasedimentary rock block at a structurally high level. Asphaltic uranium deposits in the rupture surface, clusters and holes. Calcite, massive and self-shaped quartz, and self-shaped dolomite deposited on the bituminous uranium ore, and partially prevent leaching uranium pitches. Some of the bituminous uranium deposits in other parts of the ore body are leached or reprecipitated at different times. Alteration and uranium mineralization are confined to the earth’s surface and extend below 300 to 400 feet below the unconformity. Much of the evidence suggests that the Lake Bitite lake uranium deposit is shallow and that later soot-like uranium deposits and scarce uranium are leached and reprecipitated. Hexavalent uranium minerals, such as calcium-calcium uranium deposits, silicon-magnesium uranium deposits and yellow silicon potash uranium deposits, are located close to the surface.