In the last decades, the understanding of temperate carbonate systems has improved considerably, but their development over glacial–interglacial timescales is still understudied in comparison to their tropical counterparts. A key question is how do temperate carbonate platforms respond to high‐amplitude, glacial–interglacial sea‐level changes? Integrated Ocean Drilling Program Site U1460 was drilled at the uppermost slope of the Southwest Shelf of Australia at the transition between the subtropical Carnarvon Ramp and the warm–temperate Rottnest Shelf. The origin and composition of the sediments in the upper 25 m below seafloor at Site U1460 were investigated using X‐ray diffraction, scanning electron, and light microscopy. The Middle Pleistocene to Holocene sequence at Integrated Ocean Drilling Program Site U1460 contains a record of sea‐level controlled sedimentary cycles. Carbonate sediments deposited during interglacial sea‐level highstands (Marine Isotope Stages 1, 5, most of 7, 9 and 11) are mainly fine‐grained (<63 µm) and dominated by low‐Mg calcite from pelagic bioclasts such as planktic foraminifera. The glacial lowstand intervals (Marine Isotope Stages 2 to 4, 6, 8, 7d, 10 and 12), instead are coarser‐grained and relatively rich in aragonite and high‐Mg calcite from neritic bioclasts, such as bryozoans. These changes in texture, mineralogy and composition are best explained by the deposition of neritic bioclasts closer to the shelf edge during glacial sea‐level lowstands. During early transgression, reworking of bioclast‐rich coastal dune deposits likely leads to transport and redeposition of neritic clasts on the upper slope. In contrast, dominantly pelagic sediments characterize deposition at the platform edge during interglacial highstands. These results highlight regional differences in the response of temperate carbonate systems to sea‐level change: A previously published model developed for early Pleistocene temperate carbonates from the Great Australian Bight indicates that shelfal material was exported to the upper slope during sea‐level highstands. It is argued that this difference is related to the change in duration and amplitude of glacial–interglacial sea‐level cycles before and after the Mid‐Pleistocene transition.

中文翻译：

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亚热带碳酸盐岩斜坡上第四纪冰川到冰川间海平面变化的沉积记录：澳大利亚西南大陆架

在过去的几十年中，对温带碳酸盐系统的了解已大大改善，但与热带气候系统相比，它们在冰川-间冰期尺度上的发展仍被研究不足。一个关键问题是温带碳酸盐岩平台如何应对高振幅，冰间冰期海平面变化？综合海洋钻探计划站点U1460是在亚热带卡那封斜坡与温带Rottnest架之间的过渡处，在澳大利亚西南大陆架的最高斜坡上钻出的。使用X射线衍射，扫描电子和光学显微镜研究了U1460站点海底以下25 m上部沉积物的来源和组成。综合海洋钻探计划站点U1460的中更新世至全新世序列包含海平面控制的沉积循环的记录。在冰间海平面高位期（海洋同位素第1、5、7、9和11期大部分）沉积的碳酸盐沉积物主要是细粒（<63 µm），并以浮游有孔虫（如板状有孔虫）中的低镁方解石为主。相反，冰川的低潮期间隔（海洋同位素第2至4、6、8、7d，10和12期）是粗粒的，并且相对较富，来自于诸如蠕虫的象质生物碎屑的文石和高镁方解石。质地，矿物学和组成的这些变化可以通过在冰川海平面低潮期更靠近陆架边缘的生物碎屑沉积来得到最好的解释。在过早犯罪期间，富含生物碎屑的沿海沙丘沉积物的返修可能导致上斜坡上的胶结岩屑的运输和再沉积。相比之下，在上冰期高台期期间，优势浮游沉积物表征了平台边缘的沉积。这些结果凸显了温带碳酸盐体系对海平面变化的响应的区域差异：先前发布的针对来自大澳大利亚湾的更新世早期温带碳酸盐开发的模型表明，在海平面高位期间，架子材料被出口到上坡。有人认为，这种差异与中更新世过渡前后冰川-冰间海平面周期的持续时间和幅度变化有关。在冰间期高潮期，平台上的沉积物主要是浮游沉积物。这些结果凸显了温带碳酸盐体系对海平面变化的响应的区域差异：先前发布的针对来自大澳大利亚湾的更新世早期温带碳酸盐开发的模型表明，在海平面高位期间，架子材料被出口到上坡。有人认为，这种差异与中更新世过渡前后冰川-冰间海平面周期的持续时间和幅度变化有关。在冰间期高潮期，平台上的沉积物主要是浮游沉积物。这些结果凸显了温带碳酸盐体系对海平面变化的响应的区域差异：先前发布的针对来自大澳大利亚湾的更新世早期温带碳酸盐开发的模型表明，在海平面高位期间，架子材料被出口到上坡。有人认为，这种差异与中更新世过渡前后冰川-冰间海平面周期的持续时间和幅度变化有关。先前发布的针对大澳大利亚湾更新世的早期温带碳酸盐开发的模型表明，在海平面高位期间，架子材料被出口到上坡。有人认为，这种差异与中更新世过渡前后冰川-冰间海平面周期的持续时间和幅度变化有关。先前发布的针对大澳大利亚湾更新世的早期温带碳酸盐开发的模型表明，在海平面高位期间，架子材料被出口到上坡。有人认为，这种差异与中更新世过渡前后冰川-冰间海平面周期的持续时间和幅度变化有关。