东太平洋多金属结核中的钡镁锰矿
- 1 国家海洋局第二研究所 杭州 310012;
- 2 南京大学现代分析中心 南京 210093
作者简介:
陈建林,男,53岁,高级工程师,海洋沉积矿物学
- 收稿日期:
1995-03-10
- 刊出日期:
1996-12-31
摘要: 本文通过多种分析手段，论证了深海结核中钡镁锰矿的存在和它的矿物学特征及其与主要金属元素间的关系，探讨了影响钡镁锰矿分布的主要因素。是：与当地的地化环境有关，氧化还原电位的高低直接影响着钡镁锰矿的形成；Ｅｈ值低的环境有利于它的生成；阳离子（如Ｍｎ２＋、Ｎｉ２＋、Ｃｕ２＋、Ｚｎ２＋等）的类质同象又往往造成Ｍｎ和这些元素成正相关；弱氧化还原环境并呈半流动态的沉积物液化层有利于Ｍｎ２＋迁移，又是Ｍｎ２＋聚集的地方，它为钡镁锰矿生成的理想层位；后期重结晶作用，又导致部分非晶质转化成钡镁锰矿；超微生物对深海锰结核──锰质核形石乃至钡镁锰矿的生成起着建造者的作用。认为：在选矿冶炼时，以选择表面粗糙或半粗糙型结核为最佳矿样。
The Todorokite in Polymetallic Nodules in East Pacific Ocean
- 1 Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012;
- 2 Center for Materials Analysis, Nanjing University, Nanjing 210093
- Received Date:
1995-03-10
- Publish Date:
1996-12-31
Abstract: The reasearch area of polymetallic nodules is located between Clariion Fracture and Clipperton Fracture, where polymetallic nodule resources are most abudant. The authors have investigated in this area for many times, and have obtainted a lot of materials and samples. The todorokite existing in nodules as the most useful manganese mineral is in a close relationship with many metallic elements. To analyse the distribution of todorokite and its relative factors is meaningful for probing into the nodules' formation mechanism. For its poor crystallinity and tiny grain, to identify todorokite is very difficult. By all sorts of analysis methods, the authors tried to prove the existence of todorokite, to study its mineral features and the relationships among its main metallic elements, and then to provide scientific basis for ore dressing and metallurgy.The study result reveals: 1) There exists todorokite in marine nodules that act as the most important manganese mineral phase. Its optic characteristic, x-ray diffraction analysis data and cell parameters are close to those of manganese. Infrared analysis also show typical todorokite spectrums. Electron microscope analysis suggests that the manganese in crystallizing band is mainly todorokite and its Mn, Cu, Ni contents are higher than those in amorphous band. 2)The todorokite content in coarse-surface nodules in deep-sea plain is often richer than that in smooth-surface nodules found in seamount. Todorokite is abundant when the substratum structure is laninar, compact, or taxitic.The paper suggests that the factors causing todorokite distributed in such a way are mainly related with the local geochemical environment. The reduction-oxidation potential value is a direct factor which affects the formation of todorokite. The low reduction-oxidation potential is helpful. The isomorph of some metal elements such as Mn, Ni, Cu, Zn, is positively related to manganese. The slight reduction-oxidation environment and peneliquid substratum are an ideal horizon which is favourable not only to the migration of the Mn ion, but also to the accumulation of Mn. The metal elements engendered by dissolution of the living beings can promote the formation of manganese noudules. Recrystalization also changes a part of amorphous body into todorokite.Based on the study of the nodules' mineralogy, it is suggested that the best mineral resource for ore dressing and metallurgy is rough-surface nodules and semi-rough-surface nodules.
陈建林, 张富生, 林承毅. 东太平洋多金属结核中的钡镁锰矿[J]. 沉积学报, 1996, 14(S1): 171-180.
| 引用本文: |
陈建林, 张富生, 林承毅. 东太平洋多金属结核中的钡镁锰矿[J]. 沉积学报, 1996, 14(S1): 171-180.
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Chen Jianlin, Zhang Fusheng, Lin Chengyi. The Todorokite in Polymetallic Nodules in East Pacific Ocean[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 171-180.
| Citation: |
Chen Jianlin, Zhang Fusheng, Lin Chengyi. The Todorokite in Polymetallic Nodules in East Pacific Ocean[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 171-180.
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