MeBo70 Seabed Drilling on a Polar Continental Shelf: Operational Report and Lessons From Drilling in the Amundsen Sea Embayment of West Antarctica

MeBo70 Seabed Drilling on a Polar Continental Shelf: Operational Report and Lessons From Drilling in the Amundsen Sea Embayment of West Antarctica
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MeBo70极地大陆架海底钻探：西南极洲阿蒙森海海湾钻探的作业报告和经验教训

DOI：
10.1002/2017gc007081
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发表时间：
2017
期刊：
Geochemistry, Geophysics, Geosystems
影响因子：
--
通讯作者：
Gohl K
Gohl K
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--
文献类型：
--
作者：
Gohl K

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多筒海底钻机首次用于钻探南极大陆架的松散沉积物和固结沉积岩，岩芯回收率在7%至76%之间。我们在阿蒙森海湾的九个钻井现场部署了MARUM-MeBo 70钻井设备。三个地点位于松岛湾的内陆架上，从那里从海底以下36米的钻探深度中回收了软沉积物，这些沉积物可能是在孤立的小盆地中以高沉积速率沉积的。六个地点位于东部和西部海湾的中间大陆架上。在其中五个地点进行的钻探，从白垩纪到中新世的倾斜地层中发现了固结沉积物和沉积岩。本报告描述了初步的取芯结果，漂流冰山和海冰带来的挑战，以及与MeBo 70部署有关的技术问题。我们还提出了类似的极地大陆架未来钻探活动的建议。
A multibarrel seabed drill rig was used for the first time to drill unconsolidated sediments and consolidated sedimentary rocks from an Antarctic shelf with core recoveries between 7% and 76%. We deployed the MARUM‐MeBo70 drill device at nine drill sites in the Amundsen Sea Embayment. Three sites were located on the inner shelf of Pine Island Bay from which soft sediments, presumably deposited at high sedimentation rates in isolated small basins, were recovered from drill depths of up to 36 m below seafloor. Six sites were located on the middle shelf of the eastern and western embayment. Drilling at five of these sites recovered consolidated sediments and sedimentary rocks from dipping strata spanning ages from Cretaceous to Miocene. This report describes the initial coring results, the challenges posed by drifting icebergs and sea ice, and technical issues related to deployment of the MeBo70. We also present recommendations for similar future drilling campaigns on polar continental shelves.
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