Marmara and Black seas: piston coring and high-resolution seismic surveying

马尔马拉和黑海：活塞取芯和高分辨率地震勘探

• 批准号: 403543-2011
• 负责人: Aksu, Ali
• 金额: $ 7.29万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Ship Time
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=488367
• 关键词: Marmara; Black; seas; piston; coring

Twenty sea days are requested for work in the SW Black Sea and NE Marmara Sea, forpiston and gravity coring and seismic profiling. The SW Black Sea was thoroughly mapped in two NSERC-funded cruises in 2005 and 2008 using a Kongsberg EM3000-series multibeam system, a Huntec deep-tow boomer profiler and an acoustic Doppler current profiler. In 2010 current velocities associated with a strong channelized saline underflow in this area were measured using an aDcp deployed on the British AUV AutoSub-III, and a set of bottom grab samples and conductivity-temperature-depth (CTD) profiles were obtained to characterize surface sediments and physical properties of the saline underflow. The proposed coring is an essential follow-up to this earlier work in order to ground-truth ages and facies of the sedimentary strata imaged in the geophysical data sets, and sedimentary processes associated with the modern saline underflow. Without dated sedimentary records from core samples, the seismic and multibeam records have limited value, and interpretations of the genesis of these deposits and the paleoceanography related to Holocene reconnection of the Black Sea to the world ocean remain speculative. The NE Marmara Sea was surveyed and sampled in 1998, 2000, 2002, 2005 and 2008 using a Huntec deep-tow sparker profiler, short corer. Long piston cores are needed to establish the ages of key surfaces and deposits. Key questions remain unanswered and/or published interpretations which have been challenged by other workers need additional support.

在黑海西南部和马尔马拉海东北部需要20个海天的工作，用于活塞和重力取心以及地震剖面。在2005年和2008年两次由nserc资助的巡航中，使用Kongsberg em3000系列多波束系统、Huntec深拖带boomer剖面仪和声学多普勒电流剖面仪对黑海西南部进行了全面测绘。2010年，使用安装在英国AUV AutoSub-III上的aDcp测量了该地区与强通道化盐水底流相关的流速，并获得了一组底部抓取样本和电导率-温度-深度（CTD）剖面，以表征地表沉积物和盐水底流的物理性质。为了在地球物理数据集中成像沉积地层的真实年龄和相，以及与现代含盐底流相关的沉积过程，所提出的取心是早期工作的重要后续工作。由于没有岩心样品的年代沉积记录，地震和多波束记录的价值有限，对这些沉积物成因的解释以及与黑海与世界海洋的全新世重新连接有关的古海洋学仍然是推测性的。在1998年、2000年、2002年、2005年和2008年，使用Huntec深缆火花剖面仪对东北马尔马拉海进行了调查和采样。需要长活塞芯来确定关键表面和沉积物的年龄。关键问题仍未得到解答和/或已发表的解释受到其他工作者的质疑，需要额外的支持。