A U–Pb geochronological and rare earth element (REE) geochemical study of zircon, monazite and garnet was carried out on rocks of Mesoproterozoic and Archean crustal domains in the Rauer Group of East Antarctica. The zircon and monazite U–Pb age spectra define concordia intercepts mainly at ca 1200, 990–910, and 530–500 Ma, suggesting that the Mesoproterozoic crustal domain is a significant part of the Rayner Complex that also underwent early Neoproterozoic and Cambrian high-grade metamorphism. The age data, mineral inclusion assemblages in zircon, and REE features for zircon and garnet indicate that all the granulite facies mineral assemblages in this domain might have formed during early Neoproterozoic metamorphism. Some zircon and monazite grains or domains have experienced complete U–Pb isotopic resetting during Cambrian reworking, which did not result in new zircon and monazite growth. The Archean crustal domain consists mainly of Paleo–Mesoarchean orthogneisses interleaving with Neoproterozoic paragneisses that contain inherited metamorphic zircon domains with ages of ca 1330 and 970 Ma. The mineral assemblages in these gneisses formed during a single Cambrian granulite facies metamorphic event. Garnet-bearing and -free rocks cooled to solidus temperatures at ca 527 and 517 Ma, respectively, whereas the isotopic system of early-crystallized zircon was completely reset during the growth of new zircon. As such, all the zircon domains in the same sample could have the same concordant or weighted mean age. The 511 Ma monazite and 506 Ma zircon overgrowths in a paragneiss have REE contents in equilibrium with garnet, implying that later modification and isotopic resetting of zircon and monazite might have resulted in younger U–Th–Pb ages and, in this case, establishing the age–mineral assemblage relationship based on REE partition coefficients between zircon/monazite and garnet may be invalid. Overall, the available data support the notion that different crustal components of the Rauer Group were juxtaposed in the Cambrian as a consequence of the Gondwana assembly.

对南极东部劳尔群中元古代和太古代地壳域的岩石进行了锆石、独居石和石榴石的 AU-Pb 年代学和稀土元素 (REE) 地球化学研究。锆石和独居石 U-Pb 年龄谱定义了协和截距主要在约 1200、990-910 和 530-500 Ma，表明中元古代地壳域是 Rayner 杂岩的重要组成部分，也经历了早期新元古代和寒武纪高级变质。锆石的年龄数据、矿物包裹体组合以及锆石和石榴石的稀土元素特征表明，该域中的所有麻粒岩相矿物组合可能形成于早新元古代变质作用。一些锆石和独居石晶粒或域在寒武纪再加工过程中经历了完全的 U-Pb 同位素重置，这不会导致新的锆石和独居石生长。太古宙地壳域主要由与新元古代平行片麻岩交错的古-中太古代正片麻岩组成，其中包含年龄约为 1330 和 970 Ma 的继承变质锆石域。这些片麻岩中的矿物组合是在一次寒武纪麻粒岩相变质事件中形成的。含石榴石和不含石榴石的岩石分别冷却到约 527 和 517 Ma 的固相线温度，而早期结晶锆石的同位素系统在新锆石的生长过程中完全重置。因此，同一样本中的所有锆石域可能具有相同的一致性或加权平均年龄。副片麻岩中 511 Ma 独居石和 506 Ma 锆石的过度生长具有与石榴石平衡的 REE 含量，这意味着锆石和独居石的后期改性和同位素重置可能导致 U-Th-Pb 年龄更小，在这种情况下，基于锆石/独居石和石榴石之间的 REE 分配系数建立年龄-矿物组合关系可能无效。总体而言，现有数据支持劳尔群的不同地壳成分在寒武纪并列是冈瓦纳大陆组合的结果的观点。