澳大利亚Lizard岛珊瑚碎块的离礁搬运

• 出 处: 海洋地质动态
• 发表日期: 1999年05期
• 关键词: 碎屑物 碳酸盐沉积物 Lizard 北礁 进积 反射剖面 沉积物样品 礁坪 岛坡 生物侵蚀

珊瑚碎屑受多种机制的影响不断地产生和破碎。因此，溶合在礁内的碎屑物质量一般超过原地的造架生物。大量物质被改造并且离礁搬运，形成一个进积的沉积物裙。如大堡礁上的中陆架平顶礁的地震反射剖面显示了礁坡上一个碳酸盐沉积物楔形体达１３ｍ厚，主要堆积在礁的背面。...

Coral debris is continually produced and fragmented by a variety of mechanisms. As a result, the amount of debris that fits within the reef generally exceeds the amount of framed creatures that are in place. A large amount of material was remodeled and moved away from the reef to form a sediment deposit. For example, the seismic reflection profile of the Middle Shelf at the Great Barrier Reef shows that a carbonate sediment wedge on the reef was up to 13 m thick, mostly on the back of the reef. ...