摘要:澳大利亚北领地南部具有近平行展布的线性沉积盆地及隆起的变质地层相间排列的特征。这种独特构造格局的形成与新元古代晚期到古生代中期的两次板内造山事件有关。研究区主要受第二次板内造山事件，即Alice Springs造山活动影响。对研究区进行地质调查和填图工作后得到以下认识：1）区域经历了3个期次的构造活动，前两期活动伴随着花岗伟晶岩的侵位；2）变形深度逐渐变浅，主应力轴分别为前两期的近南北向和第三期的北西—南东向；3）研究区的花岗伟晶岩主要由常见的造岩矿物构成，呈平缓的席状侵位特征，并未发育与围岩相同的剪切面理，也没有出现由结晶分异导致的分带现象，因此推测其成矿潜力较小。
关键词: 北领地/
Alice Springs造山运动/
构造期次/
伟晶岩成矿
Abstract:The south of Australia northern territory is characterized by alternative arrangement of nearly parallel linear sedimentary basins and raised metamorphic basement. Such distinct structural pattern is concerned with two intraplate orogenic events from Late Neoproterozoic to Middle Paleozoic, the research area is mainly affected by the second event i. e. Alice Springs Orogeny. Based on the geological survey and field mapping in research area, the following conclusions can be obtained:1) There are three periods of tectonic activities, with the intrusion of pegmatite during the previous two periods; 2) The depth of deformation becomes shallow gradually with time, the principal stress axes is nearly S-N direction in the previous two periods and NW-SE direction in the last period; 3) The granite pegmatite in research area is composed mainly of common rock-forming minerals, characterized by flat-sheet emplacement, without shear foliations same as surrounding rocks and obvious zoning caused by crystallization differentiation. Therefore, it is speculated that the pegmatite has low metallogenic potential.
Key words:Northern Territory/
Alice Springs Orogeny/
Structural period/
Pegmatite mineralization
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