内蒙地轴古老基底岩石淋滤试验样品的仪器中子活化分析     

易惟熙黄舜华  王中刚何松裕张在权  章钟嵋 《地球化学》1984,(2):170-175

In this work INAA has been performed on some leached samples of Early Proterozoic gneissic biotite granite and augen gneiss from the Nei Monggol earth‘s axis for the contents of REE and some other trace elements. The results show that these two sorts of rocks and their leaching solutions and dregs have the same REE patterns.  相似文献   

昆仑山-阿尔金山地区的三条富碱侵入岩带   总被引：4，自引：0，他引：4  

王中刚  王元龙  毕华  朱笑青 《华南地质与矿产》2002,(3):2-8

在新疆南部的昆仑山－阿尔金山地区，分布有三条富碱侵入岩带，它们是拉配泉－伊吞布拉克富碱侵入岩带、别里赛－阿布拉斯富碱侵入岩带及盖孜－塔什库尔干富碱侵入岩带。前两条岩带的形成时代为燕山期，后一条岩带为喜山期，是我国最年轻的一条富碱侵入岩带。富碱侵入岩带的厘定，可认识本地区构造－岩浆活动历史有重要意义。  相似文献   

表生循环水向成矿溶液转变条件的模拟实验──表生循环水向成矿溶液演变机理之(一)     

陈福  王中刚  朱笑青 《矿物学报》1997,(4)

对成矿溶液性质的认识是成矿理论和成矿预测的基础。本文用云南腾冲热泉水、勐野并钾盐卤水、青岛海洋水、贵州赤天化含油气水、贵阳雨水以及从贵阳森林公园腐殖土中提取的含腐植酸的水溶液，和自配的pH＝1．0的含氯酸性水，对西南地区不同岩性的四种矿源岩样进行了加温浸泡溶解实验。另外还利用表生风化淋滤模拟实验装置对该四种矿源岩样进行了三种不同大气雨水的风化淋滤模拟实验。实验结果表明酸雨和酸性水最容易形成高含量的成矿溶液；含腐植酸的水有时对多种金属也能形成较高含量的合矿溶液。但现代雨水、腾冲火山热泉水、勐野井钾盐卤水、青岛海洋水、贵州赤天化含油气水等近中性和偏碱性的表生水对Fe、Mn、Cu、Pb、Zn、等常量金属元素几乎不能形成高含量的合矿溶液；当溶液中存在强络合剂时，可能对某些贵金属和稀有、分散元素的搬运和成矿具有较重要意义。  相似文献   

自然界酸性溶液的形成和向成矿溶液演化机理──表生循环水向成矿溶液演变机理之(二)     

陈福  王中刚  朱笑青 《矿物学报》1997,(4)

对成矿溶液性质的认识是矿床成因和预测矿床的理论基础。到目前为止，讨论“酸性成矿溶液成矿机理”的报导甚少。作者认为，既然火山气体冷暖水是强酸性的，地壳中的岩浆气液冷凝水必然也是强酸性的，其pH接近于零，由岩浆气液冷凝水演变成的合矿溶液及其成矿作用在地质中可能是相当普遍的现象。本文讨论了岩浆气液冷凝水向含矿溶液转变的条件和机理、含矿溶液成矿的条件和机理，以及随后溶液又向近中性卤水成分演变的规律。本文以扬子地块西南缘低温热液交代改造型矿床为例，揭示地壳中酸性含矿溶液成矿的普遍规律及地质证据。  相似文献   

自然界酸性溶液的形成和向成矿溶液演化机理   总被引：1，自引：1，他引：1  

陈福  王中刚 《矿物学报》1997,17(4):399-411

对成矿溶液性质的认识是矿床成因和预测矿床的理论基础。到目前为止，讨论“酸性成矿溶液成矿机理”的报导甚少。作者认为，既然火山气体冷凝水是强酸性的，地壳中的岩浆气液冷凝水必须也是强酸性的其ｐＨ接近于零，由岩浆气液冷凝水演变成的含矿溶液及其成矿作用在地质中可能是相当普遍的现象，本文讨论了岩浆气液冷凝水向含矿溶液转变的条件和机理，含矿溶液成矿的条件和机理，以及随后溶液又向近中性卤水成分演变的规律。本文以扬  相似文献   

华南花岗岩的稀土元素分布模式   总被引：3，自引：0，他引：3  

王中刚赵振华  赵惠兰 《地球化学》1980,(1):1-12

REE. determinations were conducted f or their fractional contents on granitoid rocks in South China, which differ in age, composition and origin by means of chemical-X-ray fluorescence spectrometry and instruments! neutron activation analysis technique. Granites under consideration can be divided into three major categories in terms of normalized REE distribution pattern of ehondrite and δEu value: 1. REE distribution pattern is approximately expressed by a smooth eurve,with unremarkable negative Eu anomaly and δEu value greater than 0.5; 2. REE distribution pattern exhibits a moderately remarkable negative Eu anomaly with δEu value in the range of 0.3---0.4; 3. REE distribution pattern gives a greatly remarkable .negative Eu anomaly,with δEu value being less than 0.2. The granites belonging to the first category are mostly older in age and closely connected with geanitization in origin, those to the second category show a number of evidences for their magmatic origin anti those to the third category are especially distinquishable for their characteristic features of later maginatio differentiation and replacement.  相似文献   

西藏南部花岗岩类的岩石化学研究   总被引：2，自引：0，他引：2  

王中刚张玉泉  赵惠兰 《地球化学》1981,(1):19-25

Based on 200 analytical data on granitoid rocks in this region, the average chemical composition has been calculated by the area weight method for various granitoid rocks of different episodes and different stages, as well as for different petrographical belts and the whole region. The origins of various types of granitoid rocks are discuesed, too.  相似文献   

试论稀土铁建造   总被引：7，自引：0，他引：7  

裘愉卓王中刚  赵振华 《地球化学》1981,(3):220-231

Geological and geochemical characteristics of REE iron formation, a term proposed by Prof. Tu Kuang-chih to specify a special type of Precambrian iron formation rich in REE, are discussed in this paper with special reference to its REE contents, REE distribution patterns, model of formation, the relationship between its development and the multistage evolution of terrestrial crust in China, and its role as an indicator of oxidation status for ancient atmosphere. Major conclusions are as follows: (1) REE iron formation is characterized by high REE concentrations as opposed to very low REE level in normal Precambrian iron formations. (2) REE iron formation was resulted from marine sedimentary-diagenetic process in miogeosyncline or intermediate regions during Proterozoic Era. To some extent,volcanic activity may be responsible for the deposition of ore-forming materials. In a broader sense, it belongs to Fe-bearing dolomite formation. On most REE iron formations there may be later mineralizations such as hydrothermo-metasomatisn, migmatitization and metamorphism superimposed. Generally, REE iron formations share common fundamental features with stratabound ore deposits. (3) It is similar to Precambrian iron formation in the enrichment of light REE.But, the degree to LREE is enriched in REE iron formation is noticed to increase with the increase of total REE eontent. Most REE iron formations are characterized hy the high ratios of ∑Ce/∑Y, Mg Fe/Ca, Na/K, Nb/Ta, Zr/Hf, Th/U, Ba/Sr, and etc. (4) The widespread occurrence of REE iron formation indicates a higher REE abundance in terrestrial crust of China and adds further support to the multistage theory regarding the chemical element evolution and differentiation in the terrestrial crust of China. (5) Preliminary data seem to support the time dependence of REE pattern and relative Eu content,  相似文献   

新疆北部花岗岩类成因类型及其与成矿的关系   总被引：7，自引：1，他引：7  

王中刚 《新疆地质》1994,(1)

新疆北部花岗岩类成因类型及其与成矿的关系王中刚（中国科学院地球化学研究所，贵阳５５０００２）（ＧｕｉｙａｎｇＩｎｓｔｉｔｕｔｅｏｆＧｅｏｃｈｅｍｉｓｔｒｙ，ＣＡＡＳ）新疆北部的花岗岩分布面积近８００００ｋｍ２，主要集中在阿尔泰山及天山，在东、西准噶尔...  相似文献   

稀土磷酸盐矿物合成的一些实验     

黄舜华  王中刚  章钟嵋  何松裕 《矿物学报》1987,(2)

本文研究了稀土磷酸盐类矿物的形成条件及矿物中各稀土元素相互置换的可能性和物理化学条件。 实验表明,独居石的形成条件范围很宽,它可在压力70—1000bar、温度>130℃、pH=2—10的范围内形成。磷钇矿的形成条件与独居石相似。在不同的温、压及pH条件下,从La—Tb的磷酸盐呈独居石的结构,而Tb—Lu却突变为磷钇矿的结构。  相似文献