The Sandow Group in the Denman Glacier area consists of low-grade supracrustal (post-cratonic) strata. Such rocks are scarce and poorly studied in East Antarctica, but are significant for a better understanding of the geological history and tectonic evolution of the Precambrian supercontinents. We report U–Pb (LA-ICP-MS) detrital zircon ages which mostly fall into two groups of ca 1350−900 Ma and ca 1800−1500 Ma, which correspond to those of crystalline rocks exposed in the western Australo-Antarctica. The youngest zircons with magmatic zoning yield ages of ca 950–900 Ma which define the maximum age of sedimentation. Chemical and neodymium isotopic compositions of the Sandow Group rocks indicate derivation from a Proterozoic largely granitic source region. High-Ti mafic volcanic activity accompanied sedimentation, and therefore the Sandow Group should be considered a volcanic-sedimentary succession. The Sandow Group was presumably accumulated in a continental (pull-apart?) basin formed in the Neoproterozoic in relation to proto-Darling Fault system activity with its continuation into Antarctica. The Sandow Group may have its correlatives in Western Australia where sedimentary successions (e.g., Moora and Badgeradda Groups) occur along the proto-Darling Fault system.

Denman冰川地区的Sandow组由低品位的上壳（克拉通后）地层组成。在南极洲东部，此类岩石稀缺且研究较少，但对于更好地了解前寒武纪超大陆的地质历史和构造演化具有重要意义。我们报告了U–Pb（LA-ICP-MS）碎屑锆石年龄，大致分为两组，分别为ca 1350-900 Ma和ca 1800-1500 Ma，这与暴露于南极洲西部的结晶岩相对应。岩浆带划分的最年轻的锆石的年龄约为950-900 Ma，这定义了最大的沉积年龄。Sandow组岩石的化学和钕同位素组成表明其来自元古生代的主要花岗岩源区。高钛铁镁铁质火山活动伴有沉积，因此，桑多（Sandow）组应被视为火山沉积沉积的演替。桑多组可能是在新元古代形成的大陆（拉开？）盆地中积累的，这与原始的达林断层系统活动有关，并一直延续到南极洲。Sandow组可能在西澳大利亚州具有其相关性，那里的沉积物演替（例如Moora和Badgeradda组）沿着原始Darling断层系统发生。