Paleo-bathymetry of the northern North Atlantic and consequences for the opening of the Fram Strait
Paleo-bathymetry of the northern North Atlantic and consequences for the opening of the Fram Strait
复制标题
北大西洋北部的古水深测量以及弗拉姆海峡开放的后果
DOI：
--
复制
发表时间：
2013
影响因子：
1.4
通讯作者：
W. Jokat
中科院分区：
文献类型：
--
作者：
B. Ehlers;W. Jokat
在过去的十年中，北大西洋北部和北冰洋中部的地球物理数据库不断扩大。Jan Mayen断裂带以北和北冰洋新的航磁和地震数据提供的信息虽然远不完整，但与现有汇编的地质和地球物理数据相结合，可用于绘制几个新生代时间间隔的古水深图。这一古水深模型为大约17 Ma左右开始通过弗拉姆海峡的最初深水交换提供了证据。此外，该模型表明，在初始海底扩张之前的地壳裂谷可能促进了较早的深水连接。这证实了耶尔马克高原的古地形在至少在深水弗拉姆海峡门户开放之前允许北大西洋北部和北冰洋之间的浅水交换方面发挥了重要作用。在研究区域的南部，古水深模型表明，从挪威-格陵兰海到北大西洋的深水溢出的第一种可能性可能在15至20 Ma之间。
In the past decade, the geophysical database in the northern North Atlantic and central Arctic Ocean constantly grew. Though far from being complete, the information from new aeromagnetic and seismic data north of the Jan Mayen Fracture Zone and in the Arctic Ocean, in combination with existing compiled geological and geophysical data, is used to produce paleo-bathymetric maps for several Cenozoic time intervals. This paleo-bathymetric model provides evidence for an initial deep-water exchange through the Fram Strait starting around 17 Ma. Furthermore, the model suggests that crustal rifting prior to initial seafloor spreading might have facilitated an earlier deep-water connection. This confirms that the paleo-topography of the Yermak Plateau played an important role in allowing at least the exchange of shallow water between the northern North Atlantic and the Arctic Ocean before the opening of the deep-water Fram Strait gateway. In the south of the research area the paleo-bathymetric model indicates that the first possibility for a deep-water overflow from the Norwegian-Greenland Sea to the North Atlantic could have been between 15 and 20 Ma.
影响因子：
2.8
作者：
M. Voss;W. Jokat
通讯作者：
M. Voss;W. Jokat