麦哲伦戈沃罗夫盖特平顶海山钴结壳资源评价

Delineation of Cobalt Crust Blocks and Estimation of Co-Rich Crust Resource of Govorov Guyot,Magellan Seamounts,Pacific Ocean

为能科学、快速量化地圈定出大洋海山钴结壳优质矿区,笔者基于国际海底管理局提出的矿区选取模型,利用我国西太平洋海山钴结壳资源调查的公开的拖网采样资料,综合钴结壳的分布规律和证据权法所得海山钴结壳资源预测后验概率图,将西太平洋麦哲伦海山区戈沃罗夫盖特平顶海山圈定为钴结壳资源前景较好的远景区,并采用人机交互式的矿区圈定方法圈定出符合国际海底管理局规章要求的7个群组共100个钴结壳矿块。据此估算出戈沃罗夫盖特平顶海山湿结壳资源量为69 487.6×104 t;圈定的100个矿块主要分布在2 000~3 000 m斜坡上,湿结壳资源量为14 092×104 t,干结壳资源量为9 789.35×104 t;锰金属量为1 961.3×104 t,铜金属量为10.17×104 t,钴金属量为54.06×104 t,镍金属量为34.87×104 t。这些数据表明,戈沃罗夫盖特平顶海山规模较大,钴结壳资源前景潜力大,可作为钴结壳深入调查和矿区申请备选海山。

In order to define the reasonable and preferable mine area for the application of oceanic Co‐rich crust mine ,after the modal of mining proposed by the International Seabed Authority (ISBA) ,based on the public dredge hauling surveying data of Co‐rich crust on Govorov Guyot and the posterior probability chart of crust potential resources from the Weights‐of‐Evidence‐Modeling ,considering the features of the regional Co‐rich crust distribution of Pacific seamounts ,the prospective area of Govorov Guyot crust resources firstly and then seven clusters (a total of 100 cobalt‐crust ore blocks ) were delineated by man‐machine interactive method for delineating mining areas based on meeting regulation requirements of ISBA .The amount of wet crust resources of Govorov Guyot is calculated to be 69 487 .6 × 104 t according to water depth .100 crust blocks are mainly distributed on the slope ,and their amount of wet and dry crust resources are calculated to be 14 092 × 104 t and 9 789 .35 × 104 t respectively ,including 1 961 .3 × 104 t manganese ,10 .17 × 104 t copper ,54 .06 × 104 t cobalt ,34 .87 × 104 t nickle .These figures show that the scale of Govorov Guyot is very large ,and its Co‐rich crust resource prospect is valuable for further survey and exploitation .