Abrasion of specimen of Calcarina used for radiocarbon dating of sediments from the reef island Barrang Lompo, Spermonde Archipelago, Indonesia

The dataset is based on 50 soft carbonate sediment samples from the reef island Barrang Lompo in the Spermonde Archipelago, Sulawesi, SE Asia. The subsurface samples were obtained by percussion drilling at 5 coring locations on the island. From each coring location, 10 samples were retrieved in 1 m intervals, thus providing samples from a maximum depth of 10 m below surface at each site (1m, 2m, ..., 10m). Laboratory data was collected between 2019 and 2021. The provided dataset contains grain size (raw and processed data; using GRADISTAT by Blott & Pye, 2001), skeletal component analysis (counting of fragments, 500 per sample; raw data) and facies determination (based on grain size and skeletal composition) of each sample. Additionally, the dataset provides raw and calibrated radiocarbon ages from 20 selected samples (calibration curve by Heaton et al. 2020; marine reservoir correction by Southon et al. 2002; calibration tool OxCal v4.4 by Bronk Ramsey, 2009). For the radiocarbon analyses, picked and pooled foraminifera of the genus Calcarina were chosen. These 20 samples were furthermore classified in terms of abrasion (1=very good preserved,... 4=very poorly preserved), following suggestions by Fellowes et al. 2017. The calibrated ages cover the earlier to late Holocene (~7,000 to 2,000 years BP). The collected data provides information of reef-derived sedimentation in the Holocene in the Spermonde Archipelago. It provides insight into the ecological background and the origin of the skeletal sediments.

本数据集基于东南亚苏拉威西岛斯波蒙德群岛（Spermonde Archipelago）巴朗隆波礁岛（Barrang Lompo）的50份软碳酸盐沉积物样品。地下样品通过冲击钻探于该岛5个取芯点位采集，每个点位以1米间隔获取10份样品，因此每个点位可获得地表以下最大深度10米的样品（依次为1米、2米……10米）。实验室数据采集工作于2019至2021年间完成。本数据集包含每份样品的粒度数据（原始与处理后数据，处理采用Blott与Pye于2001年开发的GRADISTAT软件）、骨骼组分分析（每份样品计数500个骨骼碎片，附带原始数据），以及基于粒度与骨骼组分的沉积相判定结果。此外，数据集还提供20份精选样品的原始与校正后放射性碳年代数据：校正曲线采用Heaton等人2020年的研究成果，海洋储层校正参考Southon等人2002年的方法，校正工具为Bronk Ramsey于2009年发布的OxCal v4.4软件。本次放射性碳分析选取了经挑选并混合的靴形虫属（Calcarina）有孔虫作为研究对象。依据Fellowes等人2017年的研究建议，这20份样品还按磨损程度进行了分级（1=保存极佳，……4=保存极差）。校正后的年代数据覆盖全新世早晚期（约7000至2000年前BP）。本次采集的数据可为斯波蒙德群岛全新世时期的礁源沉积作用提供研究支撑，同时有助于解析骨骼沉积物的生态背景与物质来源。