Annotated record of the detailed examination of Mn deposits from DSDP Leg 29 (Holes 275, 276, 277, 278, 280, 280A, 281, 282, 283, 283A, 284)

Manganese nodules, micronodules, and crusts were encountered in surface sediments, and at depth, in 6 of the 10 sites drilled during DSDP Leg 29 south of New Zealand and Tasmania. Major concentrations of surface nodule pavements occur on and adjacent to the Campbell Plateau south of New Zealand, south of the Tasman Rise, and in the South Tasman Sea. These deposits are found on top of erosional unconformities, which span tens of millions of years and reflect scouring by strong bottom currents. Micronodules were also found at depth throughout most of these cores. Their occurrence apparently is dependent upon a number of environmental factors.

在新西兰和塔斯马尼亚以南的深海钻探计划（DSDP）第29航次钻探的10个站点中，有6个站点的表层沉积物及深层均发现了锰结核、微结核和结壳。表层结核铺盖的主要富集区分布于新西兰以南的坎贝尔高原及其邻近区域、塔斯曼海隆以南以及南塔斯曼海。这些矿床位于侵蚀不整合面之上，该不整合面跨越数千万年，反映了强底流的冲刷作用。在这些岩心的大部分深层区域也发现了微结核，其赋存状态显然取决于多种环境因素。