Carbonate budget of a cold-water coral carbonate mound:: Propeller Mound, Porcupine Seabight
Carbonate budget of a cold-water coral carbonate mound:: Propeller Mound, Porcupine Seabight
复制标题
DOI：
10.1007/s00531-005-0493-0
复制
发表时间：
2007-02-01
影响因子：
2.3
通讯作者：
Dullo, Christian
中科院分区：
文献类型：
--
作者：
Dorschel, Boris;Hebbeln, Dierk;Dullo, Christian
来自东北大西洋的冷水珊瑚碳酸盐丘陵-螺旋桨丘陵的高分辨率研究表明，这个丘陵由50%的碳酸盐组成，这证明了“碳酸盐丘陵”的名字是合理的。在过去的大约300,000年中，大约三分之一的碳酸盐是由冷水珊瑚贡献的，即Lophelia pertusa和MadResia oculata。珊瑚对螺旋桨丘碳酸盐预算的贡献可能伴随着珊瑚缓冲悬浮物的未知部分。然而，螺旋桨丘序列中延长的间歇期只允许计算碳酸盐净聚集量。因此，过去175KYR的碳酸盐净积累量仅为0.3g/cm(2)/KYR，甚至比丘外沉积物的净积累量还要少。这些数据表明，螺旋桨丘面临着半深海沉积物的埋葬，就像在调查区域以北发现的许多埋藏的碳酸盐丘一样。
High resolution studies from the Propeller Mound, a cold-water coral carbonate mound in the NE Atlantic, show that this mound consists of > 50% carbonate justifying the name 'carbonate mound'. Through the last similar to 300,000 years approximately one third of the carbonate has been contributed by cold-water corals, namely Lophelia pertusa and Madrepora oculata. This coral bound contribution to the carbonate budget of Propeller Mound is probably accompanied by an unknown portion of sediments buffered from suspension by the corals. However, extended hiatuses in Propeller Mound sequences only allow the calculation of a net carbonate accumulation. Thus, net carbonate accumulation for the last 175 kyr accounts for only < 0.3 g/cm(2)/ kyr, which is even less than for the off-mound sediments. These data imply that Propeller Mound faces burial by hemipelagic sediments as has happened to numerous buried carbonate mounds found slightly to the north of the investigated area.