(Table 1) Basement penetration, recovery, and lithology of crustal DSDP holes in the North Atlantic Ocean

Oceanic crustal drilling by R. V. Glomar Challenger at 15 sites in the North Atlantic has led to a complex picture of the upper half kilometer of the crust. Elements of the picture include the absence of the source for linear magnetic anomalies, marked episodicity of volcanic activity, ubiquitous low temperature alteration and evidence for large scale tectonic disturbance. Comparison sections in the Pacific and much deeper crustal drilling are needed to attack problems arising from the North Atlantic results.

在北大西洋15个站位开展的格洛玛·挑战者号（Glomar Challenger）科考船海洋地壳钻探作业，为我们勾勒出地壳上部半公里范围内的复杂地质图景。该图景涵盖多项关键特征：线性磁异常的源区缺失、显著的火山活动幕式性、普遍存在的低温蚀变作用，以及大规模构造扰动的相关证据。为解决由本次北大西洋钻探结果所引出的一系列科学问题，需开展太平洋区域的对比剖面研究以及更深层的海洋地壳钻探作业。