全球三大洋海山钴结壳资源量估算

发布时间：2018-02-01 10:55

本文关键词： 三大洋海山钴结壳资源量估算矿产资源评价　出处：《海洋学报》2015年01期 　论文类型：期刊论文

【摘要】：钴结壳具有Co、Ni、Cu和Mn及其他金属的潜在矿产资源和储存在结壳层中古环境信息的双重意义。与深海多金属结核和热液硫化物矿床相比,具有较高Co、Ni和Pt含量的海山钴结壳有可能成为商业勘探的潜在目标。为合理地估算出全球三大洋海山钴结壳资源量,基于我国西太平洋海山钴结壳拖网采样调查资料和对太平洋海山钴结壳资源分布规律和钴结壳矿区圈定参数指标的深入研究,按海山不同高度、不同洋壳年龄赋予不同结壳厚度,进而计算出全球三大洋海山钴结壳分布面积为3 039 452.14km2和干结壳资源量为(1 081.166 1~2 162.332 2)×108 t。太平洋海山钴结壳分布面积为2 123 087.12km2和干结壳资源量为(513.244~1 026.488)×108 t,大西洋海山钴结壳分布面积为512 509.74km2和干结壳资源量为(116.503 2~233.006 4)×108 t,印度洋海山钴结壳分布面积为403 855.28km2和干结壳资源量为(81.484 9~162.969 8)×108 t。三大洋海山钴结壳的Mn、Co、Ni和Cu金属量分别为(138.848 0~277.696 0)×108 t,(3.967 6~7.935 2)×108 t、(2.793 6~5.587 2)×108 t和(0.825 1~1.650 2)×108 t。根据钴结壳的Co含量、Co通量和厚度相关分析,所赋予的钴结壳厚度占理论推测厚度的6.10%~12.20%,这与Ku等得出"钴结壳生长时间约占其整个生命史4%"的认识非常相近。三大洋海山钴结壳实测厚度与赋值厚度对比分析表明,太平洋海山钴结壳赋值厚度平均值为1.87cm,实测厚度平均值为1.77cm,相对误差为5.35%,大西洋和印度洋相对误差分别为18.18%和23.23%。研究数据表明按海山高度和洋壳年龄所赋的钴结壳厚度基本合理,估算出的钴结壳资源量基本可靠。本文首次估算出三大洋海山钴结壳资源量,为整个海盆和三大洋海山钴结壳资源量估算提供了新方法。
[Abstract]:Cobalt crusts are of dual significance in terms of the potential mineral resources of CoNII, Cu, mn and other metals and the paleoenvironmental information stored in crusts, compared with deep-sea polymetallic nodules and hydrothermal sulphide deposits. The seamounts cobalt crusts with high Co-Ni and Pt contents may be potential targets for commercial exploration. In order to reasonably estimate the resources of cobalt crusts in the three major ocean seamounts in the world. Based on the sampling and investigation data of cobalt crusts trawling in the western Pacific Ocean in China and the in-depth study on the distribution of cobalt crusts in the Pacific Ocean and the parameter indices of the delineation of cobalt crusts, different heights of seamounts are studied. Different oceanic crust ages give different crust thickness. The distribution area of cobalt crusts in the three ocean seamounts is calculated to be 3 039 452.14 km 2 and the dry crusts resource amount is 1 081.166 1 / 2 162.332 2). The distribution area of cobalt crusts in the Pacific seamounts is 2 123 087.12 km 2 and the dry crusts resource amount is 513.244 4 (1 026.488) 脳 10 8 t. The distribution area of cobalt crusts in Atlantic seamounts is 512 509.74 km ~ 2 and the dry crust resources are 116.503 2 ~ 233.0064) 脳 10 ~ 8 t. The distribution area of cobalt crusts in the Indian Ocean seamounts is 403 855.28 km ~ 2 and the dry crust resources are 81.484 9 ~ 162.969 8). Mn from the cobalt crusts of the three oceanic seamounts. The metal contents of Ni and Cu are 138.848 0 / 277.696) 脳 10 ~ (8) t ~ (3.967) ~ (7.935 2) 脳 10 ~ (8) t respectively. 2.7936 (5.5887 2) 脳 108 t and 0.825 1 (1.650 2) 脳 10 8 t. According to the Co content of cobalt crusts. The correlation analysis of Co flux and thickness shows that the thickness of cobalt crust is 6.10% or 12.20% of the predicted thickness. This is very close to Ku's understanding that "the growth time of cobalt crusts accounts for about 4% of its whole life history". The comparison and analysis of the measured and assigned thickness of cobalt crusts in the three oceanic seamounts show that. The average value of the assigned thickness of the cobalt crust in the Pacific seamounts is 1.87 cm, the average value of the measured thickness is 1.77 cm, and the relative error is 5.35%. The relative errors of the Atlantic Ocean and the Indian Ocean are 18.18% and 23.23, respectively. The results show that the thickness of the cobalt crusts is reasonable according to the seamount height and the oceanic crust age. The estimated amount of cobalt crusts is basically reliable. In this paper, the resources of cobalt crusts in three oceanic seamounts are estimated for the first time, which provides a new method for the estimation of cobalt crusts in the whole ocean basin and the three oceanic seamounts.
【作者单位】：国家海洋局第二海洋研究所海底科学国家海洋局重点实验室;国家海洋局第二海洋研究所;国家海洋局第一海洋研究所;浙江大学地球科学系;国土资源部广州海洋地质调查局;
【基金】：中国大洋协会国际海域资源调查与开发“十二五”研究项目——全球大洋富钴结壳成矿对比与资源潜力评价(DY125-13-R-06);首采区多金属结核资源评价(DY125-14-R-01)
【分类号】：P744
【正文快照】： 1引言生长在洋底海山上钴结壳(Co-rich ferromanga-nese crust)是Mn、Cu、Co、Ni、Pt和其他金属的潜在矿产资源[1—2],也是储存大量海洋环境信息的重要载体[3—4]。由于钴结壳集海洋资源和环境双重信息,各国对其调查研究方兴未艾。自20世纪80年代起,德国、俄罗斯、美国、法

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