Rock geochemical composition near an Antarctic snow petrel stomach oil deposit

Organic geochemistry, stable isotope analysis and elemental scans are presented here from a stomach-oil deposit collected at Heimefrontfjella Range, Dronning Maud Land, East Antarctica. Stomach-oil deposit 3012MUM2 was collected in season 2014–15 from the Boysennuten nunatak in the Heimefrontfjella Range of East Antarctica (74° 34.14'S; 11° 15.02'W). The aim of the analysis is to investigate snow petrel diet during the Holocene and in turn to infer changing sea-ice conditions in the Weddell Sea and South Atlantic sector of the Southern Ocean (Stevenson et al., Climate of the Past Discussions). The data include results from non-destructive XRF scanning, fatty acid distributions and other biomarkers of productivity and diet (Department of Geography, Durham University, Durham, U.K.) and bulk stable carbon and nitrogen isotope ratios (Department of Earth Sciences, Durham University, Durham, U.K.). The age-depth model is constrained by 12 new bulk radiocarbon measurements (Beta Analytic Inc., Miami; SUERC, Glasgow).

本数据集收录了采自东南极洲毛德皇后地（Dronning Maud Land）海姆弗龙特菲耶拉山脉（Heimefrontfjella Range）的胃油沉积物（stomach-oil deposit）的有机地球化学、稳定同位素分析与元素扫描数据。本次研究的胃油沉积物样品3012MUM2采集于2014-2015年度，采样点位于东南极洲海姆弗龙特菲耶拉山脉的博伊森嫩滕冰原岛峰（Boysennuten nunatak），坐标为南纬74°34.14′、西经11°15.02′。本次分析的研究目标为重建全新世时期雪鹱的食性，进而推断南大洋威德尔海与南大西洋扇区的海冰变化情况（Stevenson等，《Climate of the Past Discussions》）。本数据集包含无损X射线荧光（XRF）扫描结果、脂肪酸分布数据以及其他反映海洋生产力与生物食性的生物标志物数据（英国杜伦郡杜伦大学地理系），同时包含整体稳定碳与氮同位素比值数据（英国杜伦郡杜伦大学地球科学系）。本研究的年龄-深度模型通过12组全新的整体放射性碳测年数据构建约束，测年测试分别由美国迈阿密的Beta分析公司（Beta Analytic Inc.）与英国格拉斯哥的SUERC（苏格兰大学环境研究中心）承担。