Geochemical composition of marine surface sediments of the Canadian Arctic

Major and trace elements, total organic carbon (TOC), were measured on 141 marine surface and terrestrial sediment samples to study modern sediment dynamics within the Canadian Arctic (CA) and to provide an assessment of metals enrichment for V, Zn, Mn and Fe. Samples were collected from different areas between Baffin Bay and Beaufort Sea during several ArcticNet expeditions (2016-2022) onboard the Canadian Coast Guard icebreaker Amundsen. The ship helicopter was used to access terrestrial sampling sites. The marine sediments were sampled with a box corer (50cm x 50cm x 60cm) and the surface uppermost 1 cm of each box core was sampled. Push cores (10 cm diameter) were taken from each box core collected. Geochemical data were measured with a Malvern PANalytical Epsilon 3-XL energy dispersive X-ray fluorescence spectrometer and TOC was measured with a Carlo-Erba NC 2500 elemental analyzer.为研究加拿大北极地区（CA）的现代沉积物动力学特征，并评估钒（V）、锌（Zn）、锰（Mn）及铁（Fe）的金属富集水平，本研究对141份海洋表层与陆地沉积物样品开展了常量与微量元素及总有机碳（Total Organic Carbon，简称TOC）的测试分析。样品采集于巴芬湾与波弗特海之间的多个区域，依托加拿大海岸警卫队"阿蒙森"号破冰船，在2016至2022年的多次ArcticNet科考航次中完成。科考船搭载的直升机用于抵达陆地采样点位。海洋沉积物采用箱式采泥器（50cm×50cm×60cm）采集，每份箱式岩心仅采集其表层最上方1cm的沉积物样品；同时从每份采集到的箱式岩心中获取直径10cm的推取岩心。地球化学数据采用马尔文帕纳科（Malvern PANalytical）Epsilon 3-XL型能量色散X射线荧光光谱仪进行测定，总有机碳（TOC）则通过Carlo-Erba NC 2500型元素分析仪完成检测。