摘要
为研究超慢速扩张洋中脊的地形分段特征和中心形态的变化,该文使用多波束水深数据,对西南印度洋中脊(10°-70°E)和加克洋中脊(7°W-102°E)进行二级洋中脊的分段和地形地貌测量,分别划分出71和19个二级洋脊段。测量结果说明,西南印度洋中脊和加克洋中脊的岩浆上涌单元间隔、洋脊段沿轴地形起伏变化、中央裂谷宽度和高度的平均值都大于扩张更快的洋中脊。超慢速扩张洋中脊的二级分段长度与沿轴地形起伏呈正相关,岩浆供给强度是扩张中心形态变化的主要控制因素。
In order to study the topographic segmentation characteristics and central morphological changes of the ultra-slow expanding mid-ocean ridge,the multi-beam bathymetric data are used in this paper.The segmentation and topography of the secondary mid-ocean ridge of the southwest Indian Ocean ridge(10°-70°E)and the Gakkelmid-ocean ridge(7°W-102°E)are measured,and 71 and 19 secondary ocean ridge segments are divided respectively.The measured results show that the interval of magmatic upwelling units,the relief of the ocean ridge along the axis,and the average width and height of the central rift are larger than those of the faster expanding Gakkelmid-ocean ridge.The second-order segment length of the ultra-slow expanding mid-ocean ridge is positively correlated with the relief of the topography along the axis,and the magma supply intensity is the main controlling factor for the morphological change of the expansion center.
出处
《科技创新与应用》
2023年第21期28-31,共4页
Technology Innovation and Application
基金
国家自然科学基金资助(41976079)。
关键词
超慢速扩张洋中脊
海底地形
分段性
岩浆供给
多波束水深数据
ultra-slow expanding mid-ocean ridge
seafloor topography
segmentation
magma supply
multi-beam bathymetric data
