Main Genetic Types of Ni Ore Deposits in China and Their Relations to Paleo-plate Tectonics

来源 :Geochemistry(English Language Edition) | 被引量 : 0次 | 上传用户:solar_cbc
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
So far three main genetic types of nickel deposit have been recognized in China:magmaticcopper-nickel sulfide deposits,nickel deposits occurring in the crust of weathering,and sedi-mentary nickel deposits.On the basis of the geotectonic settings of intrusive bodies,their gene-tic types,and the way sulfides are concentrated,the copper-nickel sulfide deposits fall into twobroad categories:deposits emplaced along paleolandmass edges and those in the mobile zones onthe outside of paleolandmasses.They can further be divided into six sub-categories and then avariety of types.The magmatic copper-nickel sulfide deposits constitute one of the most important genetic typesin China.Geological evidence shows that the individual ferruginous ultrabasic bodies intrudingalong paleolandmass edges are most favourable for Ni-mineralization.In the light of the paleo-structural analysis,the author has proposed three mechanisms withrespect to the formation of Ni-bearing ultrabasic bodies. So far three main genetic types of nickel deposit have been recognized in China: magmaticcopper-nickel sulfide deposits, nickel deposits occurring in the crust of weathering, and sedi-mentary nickel deposits. On the basis of the geotectonic settings of intrusive bodies, their gene -tic types, and the way sulfides are concentrated, the copper-nickel sulfide deposits fall into twobroad categories: deposits emplaced along paleolandmass edges and those in the mobile zones on the outside of paleolandmasses. They can further be divided into six sub-categories and then avariety of types. the magmatic copper-nickel sulfide deposits constitute one of the most important genetic types in China. Geological evidence shows that the individual ferruginous ultrabasic bodies intrudingalong paleolandmass edges are most favourable for Ni-mineralization. the light of the paleo-structural analysis , the author has proposed three mechanisms withrespect to the formation of Ni-bearing ultrabasic bodies.
其他文献
6月25日,中共中央总书记、国家主席、中央军委主席胡锦涛实地考察了北京市奥运会配套交通设施。他去了工程建设收尾阶段的北京南站,乘坐了“和谐号”动车组列车;还在轨道交通
前轻重量级、次重量级拳王穆罕默德·卡维职业生涯取得过无数荣耀,不过,令人感到惊奇的是,他学会拳击的场所不是在拳击馆,而是在纽约街头。一直以来,我们已经习惯于许多拳坛
《画法几何》一书中对“两个回转二次曲面的相贯线在回转轴公共平面上的投影”有四条基本定理,其中第四条为:两个轴线相交的二次回转曲面相交,相贯线在公共对称面上的投影是
搞好国营大中型企业,是人们十分关注的热点经济问题。尽管这个问题在8年以前就已经提出,但是,8年的努力,问题并没有得到解决。相反,国营大中型企业的处境日趋恶化,亏损增加,
自《大学英语教学大纲》和《专科英语教学基本要求》问世以来,许多院校把英语课程作为重点课程来建设,在很大程度上促进了高校英语教学水平的提高。然而,在取得成绩的同时,我们也
西方经济连续8年增长以后,90年代开始逆转。据西方报刊分析,西方经济形势的恶化以及各国经济发展的不平衡,将对西方经济关系产生下述影响: 首先,经济实力对比及对国际资金的
碳是钢铁中必然的一种元素,它主要以碳化物存在于钢铁之中,只有少数几种钢中才有极少数的游离碳存在。钢铁中的硫是由冶炼钢铁的原料带来的,是极有害的杂质,它使钢具有热脆
目的:探讨双水平气道正压通气治疗急性左心力衰竭的疗效。方法:36例急性左心力衰竭患者应用双水平气道正压通气治疗,比较治疗前、后血气分析结果及心率、呼吸频率等指标的变
第29届奥运会的主要赛场在北京,为此,北京新建比赛场馆12座,其中有著名的“鸟巢”和“水立方”;改扩建场馆11座;临建场馆8座。另外,还在6个城市 The main venue for the 29t
期刊
众所周知,荷兰足球久负盛名的,除了斯奈德式进可攻退可守的前卫和海廷加式攻击力极强的后卫外,就是进球如拾草芥、技术全面的范尼式中锋和善于边路配合中锋的罗本式暴走型边