Giant carbonate mounds along the Porcupine and SW Rockall Trough margins
Giant carbonate mounds along the Porcupine and SW Rockall Trough margins
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豪猪海槽和西南罗卡尔海槽边缘的巨型碳酸盐土丘
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发表时间：
2003
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通讯作者：
N. Kenyon
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作者：
T. V. Weering;H. Haas;A. Akhmetzanov;N. Kenyon
罗卡尔海槽是沿着爱尔兰和英国西部大陆边缘的一个主要深水盆地。罗科尔海槽东南和西南边缘的高分辨率地震剖面研究（图1）由NIOZ在1987年和随后的ENAMII项目期间（1996-1999年，图1，图2），由巡航TTR 7的侧扫声纳和地震结果补充（Kenyon等人，1998年）揭示了在南罗科尔海槽东南和西南边缘的上斜坡上存在部分被冷水碳酸盐珊瑚沿着覆盖的巨大碳酸盐土丘。与最近报告的在附近的豪猪湾（Hovland等人，1994年）和豪猪湾（Henriet等人，1998年）发现的土丘相比，这些土丘的尺寸不同，无论是直径还是在海床以上的最高高度，一般都较大。
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图1.
罗科尔海槽地区和邻近大陆边的一般水深测量（根据全球大洋深度测量组织，1997年）。A、B概述研究区域，详见图2。垂直于水深测量的线显示了NIOZ在ENAM II和NA 87调查期间采集的地震线的位置
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图2.
A用于本研究的西南罗卡尔海槽（SWRT）边缘研究区的详细水深测量和地震线位置。以粗体突出显示并带有行号的章节参考Pigs，3-6中重现的章节。B用于本研究的东南罗卡尔海槽边缘研究区的详细水深测量和地震测线位置。带行号的粗体部分指图7中再现的部分
The Rockall Trough is a major deep water basin along the western continental margins of Ireland and Britain. High resolution seismic profiling investigations of the SE and SW margins of the Rockall Trough (Fig. 1) by NIOZ in 1987 and subsequently during the ENAMII project (1996–1999, Fig. 1, Fig. 2), complemented by sidescan sonar and seismic results of cruise TTR 7 (Kenyon et al. 1998) revealed the presence of giant carbonate mounds partially covered with cold water carbonate corals along the upper slope of both the SE and SW margins of the Southern Rockall Trough. These mounds have different dimensions and are generally larger, both in diameter and maximum elevation above the seabed, compared with the mounds reported recently from the nearby Porcupine Basin (Hovland et al. 1994) and from the Porcupine Bight (Henriet et al. 1998).
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Fig. 1.
Generalised bathymetry of the Rockall Trough area and adjacent continental margins (based on GEBCO, 1997). A, B Outline study areas detailed in Fig. 2. Lines perpendicular to bathymetry show positions of seismic lines acquired during ENAM II and NA87 surveys by NIOZ
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Fig. 2.
A Detailed bathymetry and location of seismic lines at the SW Rockall Trough (SWRT) margin study area used for the present study. Sections highlighted in bold with line number refer to seetions reproduced in Pigs, 3–6. B Detailed bathymetry and location of seismic lines at the SE Rockall Trough (SERT) Margin study area used for the present study. Section in bold with line number refers to section reproduced in Fig. 7