中文摘要：

富钴结壳是一种具有战略意义的深海矿产资源。深海浅钻能够定点获取结壳岩芯样品,是目前富钴结壳资源勘查最重要的方法之一。总结了“海洋六号”船1.5m深海浅钻在大洋23,27和29航次中的应用情况,针对其完成的166个浅钻钻位、获取得142个岩芯样品的结壳厚度、基岩类型、取样长度以及施工难度等进行了统计和分析。结果表明：深海浅钻取样长度和地层类型有着密切的关系。

英文摘要：

Cobalt-rich crust is a kind of deep-sea mineral re- sources with strategic significance. The deep-sea rock drill is one of the most important methods to explore cobalt-rich crusts, which can get rock samples from seabed. The appli- cation situations of the vessel, named ＂Ocean No. 6＂, were summarized for the deep-sea rock drill of 1.5 m during the 23th, the 27th and the 29th ocean cruise. The crust thick- ness, rock type, sampling length and difficulty degree from 166 drilling stations and 142 core samples were counted and analyzed. The results showed that the sampling length of deep-sea rock drill had close relation with the stratigraphic type.