Deep water sedimentary processes in the Enderby Basin (East Antarctic margin) during the Cenozoic
Deep water sedimentary processes in the Enderby Basin (East Antarctic margin) during the Cenozoic
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恩德比盆地（南极东部边缘）新生代深水沉积过程
DOI：
10.1111/bre.12690
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发表时间：
2022
期刊：
影响因子：
3.2
通讯作者：
F. J. Hernández
中科院分区：
文献类型：
--
作者：
Xiaoxia Huang;Shiguo Wu;L. De Santis;Guolong Wang;F. J. Hernández
东南极洲边缘恩德比盆地保存的中晚新生代厚层序沉积物包含了近34世纪以来冰川历史和古海洋条件的关键信息。通过地震地层学研究，可以重建冰川作用与海洋环流的相互作用。在这里，从广泛的二维地震数据集（~ 75000公里）获得的地震序列和地貌解释与在大陆隆起钻探的ODP站点1165的岩性数据相关联，并用于评估沉积物的年龄和起源，以及洋流对其分布的可能影响。地震单元和相图显示，除了来自南极大陆的冰川沉积物外，上新生代序列还包括从Prydz湾以西的Mac. Robertson陆缘形成的带进阶序列的漂移单元。在海底通道的西侧生长了三个等高岩漂移，而大的泥沙波场表明，这是一个受西流底流影响的混浊流混合系统。这些漂移由四个地震单元组成，分别代表了开始阶段（下渐新世）、主要生长阶段（早—中中新世）、维持阶段（中—晚中新世）和埋藏阶段（上新世）。漂移的内部几何形状和反射模式表明，中新世早期至中中新世的洋流活动加剧。结果表明，原南极底水的形成始于始新世-渐新世交界，在中新世早期至中新世中期间断性加强。
The thick sequence of mid‐late Cenozoic sediments preserved within the Enderby Basin of the East Antarctica margin contains key information regarding glacial history and palaeo‐oceanographic conditions during the last 34 My. The interplay between glacial processes and ocean circulation can be reconstructed from seismic stratigraphic studies. Here, interpretation of seismic sequences and geomorphology from an extensive 2D seismic dataset (∼75,000 km) are correlated with lithological data of the ODP site 1165 drilled on the continental rise, and used to assess the age and origin of the sediment, and the possible influence of oceanic currents on its distribution. Mapping of seismic units and facies reveals that, in addition to glacial sediments derived from the Antarctic mainland, the upper Cenozoic succession includes drift units with prograding sequences building out from the Mac. Robertson Land margin, west of the Prydz Bay. Three contourite drifts grew on the western side of submarine channels and large sediment wave fields suggest a mixed system of turbidity currents influenced by west‐flowing bottom currents. The drifts are composed of four seismic units representing stages of onset (Lower Oligocene), main growth (Early‐Middle Miocene), maintenance (Middle‐Late Miocene) and burial (Pliocene). The internal geometry and reflection patterns of the drifts imply an intensified current activity from the Early to Middle Miocene. The results plausibly reflect that the formation of proto Antarctic Bottom Water (AABW) started around the Eocene–Oligocene boundary and intensified episodically from the early to middle Miocene.
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阿德莱德岛近海太平洋边缘南极半岛新近纪至第四纪地层演化：从非冰川状态、受冰川影响状态到完全冰川状态的转变
影响因子：
3.9
作者：
Hernández-Molina F
通讯作者：
Hernández-Molina F
影响因子：
4.3
作者：
Liebrand, D.;Lourens, L. J.;Paelike, H.
通讯作者：
Paelike, H.
影响因子：
2.8
作者：
C. Escutia;R. DeConto;R. Dunbar;L. De Santis;A. Shevenell;Timothy Nash
通讯作者：
C. Escutia;R. DeConto;R. Dunbar;L. De Santis;A. Shevenell;Timothy Nash
中新世将呈现斯科舍海和南极冰盖动力学的海洋学变化：IODP第382次远征后修订的地震地层学的见解
影响因子：
5.3
作者：
Pérez L
通讯作者：
Pérez L