New aeromagnetic data from the western Enderby Basin and consequences for Antarctic-India break-up
New aeromagnetic data from the western Enderby Basin and consequences for Antarctic-India break-up
复制标题
DOI：
10.1029/2010gl045117
复制
发表时间：
2010-11-13
影响因子：
5.2
通讯作者：
Leinweber, V.
中科院分区：
文献类型：
--
作者：
Jokat, W.;Nogi, Y.;Leinweber, V.
为了加强我们对东印度和南极洲之间大陆分裂的了解，日本/德国在南极洲德龙宁毛德地东部和恩德比地西部进行了航空地球物理调查。与斯里兰卡以南的共轭边缘相比，测线间距为20公里的系统测量对印度/南极洲初始分裂的时间提供了强有力的限制。虽然大陆-海洋过渡非常明显的正负磁异常，但在新的数据集中没有发现该区域以北存在磁扩散异常的迹象。因此，在最近发表的模型，数据只支持运动学模型，其中包括斯里兰卡/印度从我们调查的地区约90-118马在白垩纪正常超时最后的分裂。引文：Jokat，W.，Y. Nogi和V. Leinweber（2010年），来自恩德比盆地西部的新航磁数据和舌印分裂的后果，地球物理学。保留信函：37，L21311，doi：10.1029/2010GL045117。
In order to enhance our understanding of the continental break-up between East India and Antarctica, a Japanese/German aerogeophysical survey was conducted off eastern Dronning Maud Land and western Enderby Land, Antarctica. The systematic survey with a line spacing of 20 km provides strong constraints on the timing of the initial break-up of India/Antarctica compared to the conjugate margin south of Sri Lanka. While the continent-ocean transition is very well marked by pronounced positive and negative magnetic anomalies, no hints on the existence of magnetic spreading anomalies north of this zone has been found in the new data set. Thus, in contrast to most recently published models, the data only support kinematic models, which include a final break-up of Sri Lanka/India from our investigated area some 90-118 Ma within the Cretaceous Normal Superchron. Citation: Jokat, W., Y. Nogi, and V. Leinweber (2010), New aeromagnetic data from the western Enderby Basin and consequences for Antarctic-India break-up, Geophys. Res. Lett., 37, L21311, doi: 10.1029/2010GL045117.