Chemical composition of bottom sediments from the Baltic Sea

According to geochemical analyses carbonaceous sediments from deep basins of the Baltic Sea containing 3-5% of organic carbon are enriched in some metals such as Cu, Mo, Ni, Pb,...经地球化学分析显示，波罗的海深海盆地中有机碳含量为3%至5%的碳质沉积物，富集铜（Cu）、钼（Mo）、镍（Ni）、铅（Pb）等多种金属。