Sternal Beata, Junttila Juho, Skirbekk Kari, Forwick Matthias, Carroll JoLynn, Pedersen Kristine Bondo
Department of Geosciences, UiT The Arctic University of Norway in Tromsø, Postboks 6050, Langnes, 9037 Tromsø, Norway; Institute of Geology, Adam Mickiewicz University in Poznań, Bogumiła Krygowskiego 12, 61-680 Poznań, Poland.
Department of Geosciences, UiT The Arctic University of Norway in Tromsø, Postboks 6050, Langnes, 9037 Tromsø, Norway.
Mar Pollut Bull. 2017 Jul 15;120(1-2):136-153. doi: 10.1016/j.marpolbul.2017.04.054. Epub 2017 May 10.
We investigate the state of sedimentological environment and contaminant status of Repparfjorden (N Norway) impacted by submarine disposal of mine tailings during the 1970s using sedimentological and geochemical properties of seventeen sediment cores. The impact of tailings disposal is mainly restricted to the inner fjord where the discharge occurred. Sediment cores retrieved from the inner fjord contain layers of mine tailings up to 9-cm thick, 3-9cm below the seafloor. Spreading of the tailing-related metal Cu and particles is limited to the inner fjord and to a 2cm layer in one core from the outer fjord. Two interrelated factors, fjord morphology and sedimentation rate, controlled the distribution of contaminant-laden tailings in the fjord. The mobility of Cu from buried contaminated sediments to the sediment-water interface in the inner fjord indicates that benthic communities have been continuously exposed to elevated Cu concentrations for nearly four decades.
我们利用17个沉积物岩芯的沉积学和地球化学性质，研究了20世纪70年代因海底尾矿处置而受到影响的雷帕峡湾（挪威北部）的沉积学环境状况和污染物状况。尾矿处置的影响主要局限于排放发生的峡湾内部。从峡湾内部取回的沉积物岩芯包含厚度达9厘米的尾矿层，位于海底以下3 - 9厘米处。与尾矿相关的金属铜和颗粒的扩散仅限于峡湾内部以及来自峡湾外部的一个岩芯中的2厘米层。峡湾形态和沉积速率这两个相互关联的因素控制了峡湾中富含污染物的尾矿的分布。内峡湾中埋藏的受污染沉积物中的铜向沉积物 - 水界面的迁移表明，近四十年来底栖生物群落一直持续暴露于升高的铜浓度中。
