东太平洋海盆内多金属结核中的铁矿物          下载免费PDF全文

萧绪琦  郭立鹤 《岩石矿物学杂志》1997,16(3):255-259

东太平洋海盆内多金属结核中的铁矿物萧绪琦郭立鹤（中国地质科学院矿床地质研究所，北京１０００３７）１前言早在五十年代人们就已注意到，大洋多金属结核含铁量较高，由于结核中矿物颗粒细小，结晶程度低，使得铁矿物的确定很困难，通常称之为铁的氧化物和氢氧化物。在...  相似文献   

大洋多金属结核及深海沉积物标准物质研制工作简述   总被引：9，自引：10，他引：9  

王毅民  滕云业 《岩矿测试》1997,16(3):161-169

简要介绍了太平洋多金属结核及深海沉积物标准物质研制中的总体设计、样品加工、均匀性检验、多实验室合作分析、数据处理以及最佳值确定。重点讨论了标准物质均匀性的定量评价与表达及其相应的测量方法。  相似文献   

Pelagic Manganese Nodules--A New Type of Oncolites     

Bian Lizeng  Lin Chengyi  Zhang Fusheng  Du De''an  Chen Jianlin  Shen Huadi Department of Earth Sciences Centre for Materiale Analysis  Nanjing University  Jiangsu Second Institute of Oceanography  State Oceanic Administration  Hangzhou  Zhejiang Liu Xinzhu 《《地质学报》英文版》1997,71(1):43-48

Pelagic manganese nodules from the East Pacific Ocean have been studied using polarizing,scanning electron and transmission electron microscopes. It has been revealed that the manganesenodules are composed of cores and stromatolite coatings. The structures and textures of thesenodules are peculiar to oncolite. Consequently, the pelagic manganese nodules are manganeseoncolites. Based on the stromatolites in the coatings, the manganese oncolites from the East Paci-fic Ocean can be divided into two types. One is smooth on surface and dense inside. Its coatingsare composed mainly of Minima. The other has a knobby surface and is loose internally. Itscoatings consist mainly of Admirabilis. The TEM investigation has also revealed that the con-structors of the manganese oncolites are ultra-microbes. The Minima is constructed byMiniactinomyces chinensis sp. nov. and the Admirabilis is built by Spirisosphaerospora pacifica sp.nov.  相似文献   

共生生金菌与锰的相互作用机制     

郝瑞霞  关广岳 《地质与勘探》1996,32(2):19-22

共生生金菌的生长具有周期性的变化特征，与锰相互作用也表现出了周期性的变化规律。该细菌影响着含锰溶液体系的ｐＨ和Ｅｈ，能将低价态的锰氧化为高价态的锰。细菌氧化锰主要借助于各种酶和不同代谢物的作用而完成。  相似文献   

多金属结核海底照片的图象识别与处理   总被引：1，自引：1，他引：1  

王公念  朱克超  叶剑平  许洪泉  梁朴 《地质论评》1996,42(6):560-563

NIRS是结核海底照片的处理系统。照片具点光源特征,中间亮边部暗,依光强与射线距离平方成反比的关系将其校正为平行光源照片;模式识别综合利用灰度、形状等特征分割图象与背景,圈定结核,然后计算覆盖率、估算丰度,以数据库存储管理信息。配置了1850DPI底片扫描仪,显示图象清晰。分析了DY851,DY853航次照片处理结果,划分出五种照片类型,提出了系统的最佳使用方法,讨论了照片处理质量的评价方法。  相似文献   

A comment on ‘a note on the characteristics and possible origins of desert varnishes from Southeast Morocco’ by Drs. Smith and Whalley     

Ronald I. Dorn 《地球表面变化过程与地形》1989,14(2):167-170

This note queries the discussion of the origins of ‘desert varnishes’ (Smith and Whalley, 1988), with particular reference to manganese-rich conditions. The case for a biotic model of varnish development is proposed and illustrated as opposed to the abiotic model put forward by Smith and Whalley.  相似文献   

Manganese-rich rock coatings from Iceland     

G. R. Douglas 《地球表面变化过程与地形》1987,12(3):301-310

Manganese-rich rock coatings are widespread in Iceland, especially in fractures in basalt lavas. Three common types of coating are described. A thick subsurface coating is found on whaleback forms on high plateaux. The most common type is thinner and occurs in hydrothermal clay-filled fracture systems which are especially well developed in tholeiite lavas. A third type occurs in younger rocks and is associated with tephra-rich, loessic sediment which fills open fractures and vesicles. There are differences in the chemistry, morphology, and mineralogy of these coatings which are interpreted as being due to the different microenvironments in which they form. The fracture microenvironment is regarded as being of much more importance to coating thickness and chemistry than simple age and in this respect the hydrothermal clays seem to favour rapid manganese concentration. On the other hand, there are variations in coating type, both laterally and vertically through the lava succession, which are related to regional distribution of hydrothermal alteration and rock type. The regional patterns are the result of Iceland's lateral drift and as a result there is an incidental connection between coating type and rock age. There is some evidence to suggest that the manganese coatings may be both forming and being degraded rapidly in the present environment.  相似文献   

云南元谋盆地干润变性土中次生方解石特征及形成   总被引：1，自引：0，他引：1  

丁桑岚黄成敏  王成善 《岩石矿物学杂志》2004,23(3):257-260

土壤新生体对于研究区域环境变化、营养元素释放以及次生成矿作用具有重要意义。利用化学分析、X射线衍射、偏光显微镜和扫描电子显微镜等探讨云南省元谋盆地干润变性土钙质结核中的次生方解石的特征和形成过程。结果表明，钙质结核中次生方解石含量高，晶形完整；钙质结核以及次生方解石形成既取决于气候，也与微地形有关。次生方解石的形成过程及特征反映了自全新世以来元谋盆地主要处于干热气候环境中。  相似文献   

Si—PIN探测器便携式X荧光分析仪在海洋多金属结核结壳分析中的应用   总被引：3，自引：5，他引：3  

吴小勇  陈永君等 《岩矿测试》2002,21(1):33-36

采用自行研制的Si-PIN探测器便携式X射线荧光分析仪对海洋多金属结核、富钴锰结壳样品进行了应用实验，测定了Ti、V、Mn、Fe、Co、Ni、Cu、As、Sr、Y、Zr、Mo和Pb等多种元素，并考察了仪器在进行现场分析的可行性。实验证明Si-PIN便携式X射线荧光分析仪能够满足大洋多金属结核和结壳现场分析的基本要求。  相似文献   

大洋多金属结核资源勘查Ⅱ阶段资源量计算方法的选择   总被引：2，自引：0，他引：2  

何高文 《海洋地质与第四纪地质》1999,19(4):21-29

大洋多金属结核资源量的精确计算是一个尚未圆满解决的问题,其根本原因是未能找到一种很合适的资源量计算方法。针对目前我国大洋多金属结核资源勘探处于勘查正阶段,地质采样网度进一步加密的现状,选择较为先进的克立格法对位于东太平洋CC区的我国开辟区东区结核资源量进行了计算,获得了比传统计算法更加精确合理的结果。  相似文献