U/Th-dating of deep-water corals from the eastern North Atlantic and the western Mediterranean Sea
U/Th-dating of deep-water corals from the eastern North Atlantic and the western Mediterranean Sea
复制标题
北大西洋东部和地中海西部深水珊瑚的 U/Th 定年
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
A. Mangini
中科院分区：
文献类型：
--
作者：
A. Schröder‐Ritzrau;A. Freiwald;A. Mangini
深水珊瑚广泛分布于北大西洋。群生的偶黄藻石珊瑚维持的生态系统主要分布在从伊比利亚半岛沿岸的斜坡和洋岸一直到挪威北部的斯堪的纳维亚大陆架的深海地带。根据 U/Th 测年，对北大西洋主要珊瑚礁区海底暴露的 37 颗深水珊瑚的地质年龄进行了估计。与斯堪的纳维亚海域、法罗地区和罗卡尔海槽的深水珊瑚的纯粹全新世时代相比，来自低纬度地区的深水珊瑚，如西北非洲附近的海山、大西洋中脊和地中海西部似乎在过去50年里持续生长。总体而言，深水珊瑚的 U/Th 年龄在 0.09 至 53.5 ka 之间。
Deep-water corals are widespread in the North Atlantic. Colonial azooxanthellate scleractinians sustain ecosystems mostly in the bathyal zone down the slopes and oceanic banks off the Iberian Peninsula to as far north as the Scandinavian shelf off northern Norway. Estimates of the geological age of 37 deepwater corals exposed at the seabed from major reef areas in the North Atlantic were based on U/Th datings. In contrast to the purely Holocene ages of deep-water corals in Scandinavian waters, the Faroe area and the Rockall Trough, deep-water corals from lower latitudes like the seamounts off NW-Africa, the Mid-Atlantic Ridge and the western Mediterranean Sea seemed to have grown continuously over the last 50 ka. Overall, deep-water corals showed U/Th ages between 0.09 and 53.5 ka.