Collaborative Research: Integrated Geophysical Study of the Arctic Mid-Ocean Ridge and Alpha Ridge from a Nuclear Submarine

为1997年SCICEX号北冰洋航行，建议对北极洋中脊和阿尔法脊进行一次地球物理调查。1997年巡航的仪器已经大大增加了一个测深系统和一个CHIRP分析器。这些仪器首次提供了系统地绘制和描述北冰洋海底大部分地区的能力。两个独特的，重要的和很大程度上未知的北冰洋结构，北极洋中脊和阿尔法脊将被调查。北极洋中脊（AMOR）是洋中脊系统中扩展最慢的海洋部分，总扩展速率为0.63 ~ 1.33 cm/年。这些扩张速度如此之低，以至于一些地幔流动模型预测不会产生地壳。目前，AMOR的形态和结构，特别是其缓慢的东部部分，几乎完全未知。阿尔法-门捷列夫海岭是一个绵延200公里的宽阔隆起，完全横跨美亚西亚盆地。尽管人们提出了许多其他的起源，但它可能是一个热点痕迹，它似乎受到了构造和火山作用的影响。阿尔法脊的构造构造和构造及其在美亚西亚盆地发育中的作用尚不清楚。

A geophysical survey of the Arctic Mid-Ocean Ridge and Alpha Ridge are proposed for the 1997 SCICEX cruise to the Arctic Ocean. Instrumentation for the 1997 cruise has been greatly augmented by a bathymetry system and a CHIRP profiler. These instruments provide, for the first time, the ability to systematically map and characterize large portions of the Arctic Ocean floor. Two unique, important and largely unknown structures of the Arctic Ocean, the Arctic Mid-Ocean Ridge and the Alpha Ridge will be investigated. The Arctic Mid-Ocean Ridge (AMOR) is the slowest spreading oceanic portion of the mid-ocean ridge system with total spreading rates of 0.63 to 1.33 cm/yr. These spreading rates are so low that some models of mantle flow predict that no crust should be produced. At present, the morphology and structure of the AMOR, and in particular its slower eastern portion, are almost completely unknown. The Alpha-Mendeleev Ridge is a broad swell which extends for 200 km completely across the Amerasia Basin. It is probably a hotspot trace although a number of other origins have been proposed, and it appears to have been affected by tectonic as well as volcanic processes. The tectonic fabric and structure of the Alpha Ridge and it role in the development of the Amerasia Basin are unknown.