IH - Instituto Hidrográfico, Rua das Trinas, 49, 1249-093 Lisboa, Portugal.
IH - Instituto Hidrográfico, Rua das Trinas, 49, 1249-093 Lisboa, Portugal.
Mar Pollut Bull. 2013 Oct 15;75(1-2):264-275. doi: 10.1016/j.marpolbul.2013.07.002. Epub 2013 Jul 26.
The Azores Platform and the Irving and Great Meteor seamounts south of the archipelago (38°N-29°N) have rarely been studied geochemically, a fact which is surprising given that they represent the south-eastern limit of region V outlined in the Convention for the Protection of the Marine Environment of the North-East Atlantic (OSPAR Convention). The main aim of the present work was therefore to characterise the spatial variability of major and minor elements in deep-sea sediment cores from these two regions. XRD and geochemical analyses revealed that whereas the Azores Platform sediments are composed of a mixture of biogenic and detrital volcanic material, those at the seamounts are characterised by carbonated biogenic remains. The latter sediments were found to contain very low amounts of volcanic or hydrothermal detrital material, being almost entirely comprised of CaCO3 (more than 80%).
亚速尔群岛平台和群岛南部的欧文和大梅森海山（北纬 38°-29°）在地球化学方面很少被研究过，这一事实令人惊讶，因为它们代表了《保护东北大西洋海洋环境公约》（OSPAR 公约）中划定的区域 V 的东南边界。因此，本工作的主要目的是描述这两个地区深海沉积物岩芯中主要和次要元素的空间变异性。XRD 和地球化学分析表明，亚速尔群岛平台沉积物由生物成因和碎屑火山物质的混合物组成，而海山上的沉积物则以碳酸盐化的生物成因残余物为特征。这些沉积物的火山或热液碎屑物质含量非常低，几乎完全由 CaCO3（超过 80%）组成。
