湘东北—桂北中元古界岩石地球化学特征

湘东北－桂北中元古代冷家溪群和四堡群的变玄武岩类显示过渡型拉斑玄武岩类的地球化学特征,变砂类和变泥岩类（绢去板岩类）显示大陆边缘的砂岩类和泥岩类的地球化学特征。根据岩石地球化学和沉积相（低密度流复理石建造）特征,推测湘东东北冷家溪群和桂北四堡群主要形成于大陆边缘深水环境。     

缅甸翡翠矿物与自然类型

ＮａＡｌＳｉ２Ｏ６分子〉５０％称为硬玉。按杂质元素将硬玉分为纯硬玉,钙硬玉、铬硬玉、绿硬玉。依据硬玉亚种及结构变化,划分为四个自然类型和１１个硬玉岩类别以及与之相对应的１１个翡翠玉种。硬玉岩的成矿作用有两个系列：纯硬玉－钙硬玉和（纯硬玉）－铬硬玉－氟镁纳闪石系列。前者参与成矿的特征元素是钠和钙;后者是钠、铬、镁。从残晶矿物提供的证据分析：前者发生在基性蚀变岩中;后者主要发生在超基性基中。硬玉岩经受     

岩石标本压力实验中自然电位变化的研究

将4×4×8厘米的岩石标本抽真空浸水,使之水饱和,沿长轴方向加压,用JC-A型电子自动补偿电测仪测电位（平行电位V_a,横向电位V_b,对穿电位V_c）,用Y5D-2型动态应变仪测标本的纵横向应变ε₁和ε₂以及压力F,用压电晶体测标本的微破裂,全部七个量由SC-16型光线示波记录仪自动记录,详见文献[1]、[2]。 文献[1]曾指出:（1）凡有引起压力降的破裂发生,同时就有电极间电位差（以下简称电位）的突变;在这样的破裂发生之前,几乎所有标本至少在一个方向上出现电位变化     

某钽铌钨铍矿化花岗岩岩石化学特征

During the magmatie evolution from biotite granite through two-mlca granite to mineralized muscovite granite it has been noted that Na^ , Mm^2 , Si^4 increase while K^ , Ca^2 , Mg^2 , Fe^2 , Fe^3 , Ti^4 , and P^5 decrease systematically in this district. Oreforming metals occur in higher abundance in biotite granite which is thought to be the representative of primary magma, and have been enriched rapidly with magmatic evolution R^ /R^2 Na^ /K^ , Rb/K, Mn/Fe and other petrochemical parameters increase whereas Ti^4 /Si^4 decreases in a sympathetic way with the enrichment of niobium and tantalum, providing good indicators of the degree of differentiation and metasematism of the magma ,Within the mineralized granite, there is a same trend of variation upward whioh is found closely related to the enrichment of tantalum. Fluorine is strongly concentrated in wall rocks above blind mineralized granite, and the eontente of tantalum and niobium in wolframite from quartz veins genetically related to the granite increase towards buried mineralization. The latter two phenomena are suggested by the author as clues to buried ore bodies.     

福建省新生代火山岩岩石化学特征及与构造地质关系的讨论

Cenozoic volcanic rocks in Fujian are of Pliocene and Pleistocene ages and can be divided into three zones: the east volcanic rock zone consists mainly of tholeiite,file west zone is limburgite and the intermediate zone is transitional in character between the former two zones with a little prevalance of olivine basalt. Two rock types can be distinguished, i.e., the limburgites containing no feldspars and the basalts including olivine basalt and .tholeiitic basalt In terms of petrochemistry, the volcanic rocks can be classified as strong alkaline, alkaline and sub-alkaline suites.Most of the strong alkaline rocks are distributed in the west zone, while the alkaline is in the intermediate zone and the subalkaline occurs predominantly in the east zone.With increasing distance from the coastline, the rocks become progressively alkaline and the potassium content and K/Si ratio increase. Significant amount of mantle material, including garnet lherzolite xenoliths and pyrope xenocrysts, has been noticed in the above-mentioned volcanic rocks. The garnet lherzolite bears strong resemblance to “mantle rocks”, especially with respect to the high values of Mg and Fe. Garnets in these rocks are Cr-bearing pyrope, with pyrope component in excess of 60 percent.It is suggested that the original basaltic melt might have been resulted from partial melting of garnet lherzolite in the upper mantle and then extruded onto the surface along the ultra-deep fault in the Pacific plate.     

地球物理探矿研究中的新发展:大地电流

礦產原料當中可作為能力來源的一向被人重視,在這些礦物中作為內燃機燃料的基礎的石油尤其重要,我們可以舉幾個數字作為證例。 蘇聯在1955年所產的原油達7000萬噸,1960年的計劃產量將達13500萬噸。在美國1954年全國所消費的能量有66.8％是從石油和天然氣供給的,而煤炭供給的部分僅佔29.3％。但是在1950年時煤炭供給的能量尚佔全國消費的總能量     

哀牢山变质带元江──墨江剖面岩石的纵波波速特征及其地质意义

依据研究区的地热梯度（25℃／km）,在高温高压（最高温度为1050℃,最高压力为1.2GPa）条件下系统测量了横穿红河-哀牢山断裂带的元江-墨江地质剖面上的哀牢山岩群各类变质岩（千枚岩、片岩、浅粒岩、变粒岩、大理岩和片麻岩）的纵波速度．实验结果表明,不同岩类的纵波速度随温度压力变化的趋势不同．在相当于衷牢山岩群变质岩峰期变质温度和压力条件下（P=0．4-0.8GPa,T=35-700℃）,测得大部分岩石的纵波速度为5．50－5．80km／s,这一纵波速度值与区域地球物理测深揭示的中地壳低速层的纵波速度相当因此,结合该区变质岩、地壳内热状态及地球物理测深研究成果可初步认为：组成哀牢山岩群的浅粒岩、变粒岩、酸性片麻岩以及部分千枚岩、片岩为该地区中地壳低速层的主要岩石类型．     

单轴压力下岩石破裂的初步研究

用几种不同加载方式对岩石样品进行了单轴压力实验。以恒定应变率(约为10^-5)对样品加载时,岩石的破裂过程大致可分成四个阶段:孔隙压缩阶段、弹性变形阶段、体积膨胀阶段和临震阶级。后二个阶段显著的特点是岩石开始表现出非弹性的体积应变并在主破裂前急剧增大,它与微破裂累积总数二者存在着同步的变化。在重复加载时,发现岩石的微破裂过程具有不可逆的性质,这种现象似乎可以用来说明同一地区短期内发生的两次地震的地震序列的不同,指出运用历史地震资料时应注意该地区应力变化的历史情况。     

Industrial minerals and rocks, aggregates and natural stones in the Nordic countries

The Nordic countries, including Greenland, have a long tradition in mining. The industrial minerals sector is expanding in most Nordic countries and extensive development has taken place during the last few years. The main commodities mined are carbonate rocks, quartz, feldspar, apatite, olivine and talc.
A number of diferent types of dimension stones are quarried in all countries. Rock aggregates are increasingly important, replacing sand and gravel aggregate as construction materials in some countries due to the need to protect ground water supplies.