PANR06MV Panorama Expedition Leg 06 - Cruise Report. In Data from Scripps Research Expeditions 1953-2005

Marine geophyiscal and geological investigation of the ultrafast spreading epr near 19 deg south, using multibeam mapping, the deep tow instrument system, dredging and coring. a near bottom deep tow profile across magnetic anomaly 5 was made for comparison with a deep tow survey of the same age crust in the northeast pacific in 1995. deep tow profiles near the epr axis suggest that geomagnetic intensity variations, rather than intrinsic differences (e.g., geochemistry or thickness) in the magnetic source layer, are responsible for much of the high frequency anomaly variation.

针对南纬19°附近的超快速扩张东太平洋海隆（East Pacific Rise, EPR）开展海洋地球物理与地质调查，采用多波束测深制图、深拖仪器系统、拖网取样与岩心取样技术。为与1995年在东北太平洋对同年代洋壳开展的深拖调查进行对比，我们布设了一条横穿磁异常5号的近底深拖剖面。东太平洋海隆轴部附近的深拖剖面结果表明，高频磁异常的多数变化由地磁强度变化所致，而非磁源层的固有差异（如地球化学特征或厚度）。