The geology of Wilkes Land, East Antarctica, is masked by kilometers of ice and remains largely unexplored. Defining the sediment provenance adjacent to this hidden region is important for distinguishing the proximal subglacial basement terranes and refining the dynamic regional glaciological history. This study presents a detrital sediment provenance record spanning c. 23.5 ka from the continental slope of central Wilkes Land. Sediment provenance was characterized using U‐Pb geochronology and trace element geochemistry from detrital zircon, titanite and apatite, and Pb isotopic signatures from detrital feldspar. These data were compared with new feldspar Pb‐isotopic signatures and existing U‐Pb zircon data sets from rare nearby coastal outcrop. A principally igneous source was revealed with dominant age populations between c. 1,360‐1,100 Ma and c. 1,620‐1,490 Ma, characteristic of rocks of the proximal Wilkes and Banzare provinces, respectively. Minor detritus was additionally sourced from the proximal Nuyina Province (c. 1,450‐1,390 Ma). Temporal variation in the climate and ice sheet configuration are likely responsible for subtle downcore changes observed in detrital sediment provenance. High sedimentation rates during the glacial period suggest reworking of continental shelf sediments and downslope transport in debris flows during ice sheet advance. Glacial meltwater fluxes fed largely by the Totten Glacier were responsible for supplying detritus during deglaciation. During interglacials, detritus was derived from a broad coastal region and delivered to the slope via multiple glacial outlets. These results present the first substantial offshore evidence to support recent interpretations that the subglacial crust of central Wilkes Land has a dominantly Mesoproterozoic history.

中文翻译：

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划伤表面：南极东部威尔克斯中部大陆斜坡的海洋沉积物记录

东极南极洲的威尔克斯土地的地质被数千米的冰层掩盖，并且仍未开发。定义该隐蔽区域附近的沉积物来源对于区分近缘冰期地下基底地形和完善动态区域冰川历史非常重要。这项研究显示了c的碎屑沉积物来源记录。距威尔克斯土地中部的大陆坡23.5 ka。利用U-Pb年代学和碎屑锆石，钛矿和磷灰石的痕量元素地球化学以及碎屑长石的Pb同位素特征对沉积物来源进行了表征。将这些数据与新的长石Pb同位素特征以及来自附近罕见海岸露头的现有U-Pb锆石数据集进行了比较。揭示了一个主要为火成岩的来源，其主要年龄段介于c到c之间。1,360-1,100 Ma和c。1,620-1,490 Ma，分别是近端威尔克斯和班扎尔省的岩石特征。小碎屑还来自努伊伊纳省的近端（约1,450-1,390 Ma）。气候和冰盖构造的时间变化可能是碎屑沉积物来源中观察到的细微下调变化的原因。冰川期的高沉积速率表明，大陆架沉积物的修复和冰盖前进过程中泥石流中的下坡运输。冰川融化过程中，碎屑主要是由托特冰川提供的冰川融水通量提供。在间冰期，碎屑来自广泛的沿海地区，并通过多个冰期出口输送到斜坡。