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地质背景卡斯梅尔(Kasmere)湖地区是加拿大地盾丘吉尔构造区的一部分。表1是该区1:50,000地质图的岩石单元层。本区最老的岩石(图1)是太古代叶片状花岗岩类岩石,年龄为2,600—2,700百万年,其上面不整合地覆盖着下元古代阿菲比亚期变质沉积岩(1,900百万年,5a—16单元层)。这些岩石分布在一个NE-SW向的沃拉斯顿褶皱带内,该带控制了本区地质构造和地球物理场的走向。本区北部发育有阿菲比亚期赫维茨群变质沉积岩(14、15、16单元层)。本区大部分为冰川沉积物覆盖,基岩露头占2％。本区虽然还没有发现铀矿床,但在加拿大矿物产地(CANMINDEX)数据文件里就包含有13个铀“产地”。
Geological Background The Lake District of Kasmere is part of the Churchill tectonic zone of the Canadian Shield. Table 1 shows the rock unit layers of 1: 50,000 geology in this area. The oldest rocks in the area (Fig. 1) are of the Archean leaf-shaped granitoids, 2,600-2,700 million years old, unconformably overlain with the Paleopian Afepian metamorphic sedimentary rocks (1,900 million years , 5a-16 unit layer). These rocks are distributed in a NE-SW-oriented Wollaston fold belt that controls the geology and geophysics of the area. In the northern part of the area, the Afichurst Hertz group metamorphic sedimentary rocks (Units 14, 15 and 16) are developed. Most of the area covered by glacial sediments, bedrock outcrop 2%. Although no uranium deposit has been found in the area, 13 uranium “origins” are contained in the CANMINDEX data file.