冀北张麻井铀钼矿床黄铁矿化蚀变岩地球化学迁移特征及与成矿关系亲缘性的讨论

张麻井铀钼矿床是中国北方最大的与火山岩有关的热液铀矿床，围岩蚀变广泛发育，其中黄铁矿化在该矿床分布虽 较为局限，但是与铀钼成矿关系密切。为了研究黄铁矿化蚀变与铀、钼成矿的亲缘关系，文章对张麻井的黄铁矿化蚀变岩 进行主、微量元素分析，并选择Yb作为不活动组分，使用质量平衡迁移计算方法， 利用Grant公式对其组分迁移进行定量 计算。岩石地球化学特征显示，黄铁矿化蚀变岩的TFeO含量极高，介于11.24%~24.57%之间(平均18.45%)，其中Fe2O3含量 10.78%~25.25% （平均18.64%）、FeO含量1.43%~1.90% （平均1.69%），Fe2O3/FeO比值平均为10.99，有可能受到后期氧 化。黄铁矿化蚀变岩在Isocon图解上等浓度线斜率小于1，表明整体发生了组分的带入，带入的主要组分为大量的TFeO （131倍），成矿元素Mo（884倍）、Pb（11倍）、U（4.9倍）、V（2.8倍）、Ta（0.44倍）、Cu（0.64倍），碱金属Na2O（0.45 倍），以及Cd（424倍）、Bi（13倍） 等；带出的主要组分有碱金属Li（-0.73）、K2O（-0.17），成矿元素Zn（-0.38）、Cr （-0.37），以及Eu（-0.58）、Sc（-0.25） 等。其中SiO2略微减少（-0.03），带入的Mo含量远大于U的含量，据此认为黄铁 矿化与钼成矿关系更为密切。     

黄骅坳陷横向变换带的构造特征及成因

讨论了黄骅坳陷横向变换带的构造特征和成因。根据利用地震反射剖面对盆地构造几何学的研究，圈定了不同尺度的横向变换带，确定了伸展构造背景下的横向变换带是为了保持区域伸展应变调节构造变形的一种调节体系。这种伸展应变守恒是靠三维空间上断层位移沿走向的变化实现的。横向变换带的构造样式为横向地垒状凸起和鼻状凸起或鼻状背斜，并具伸展性质的正断层。横向凸起与非叠复的和叠复的分段断层系伴生及发育在断层位移最小处等事实表明，横向凸起或横向鼻状背斜是由于分段断层系位移沿走向变化形成的。     

高温高压下水岩界面反应与金的迁移富集

高温高压下水岩界面反应与金的迁移富集王玉荣阚小凤王志强（中国科学院广州地球化学研究所，广州５１０６４０）关键词水岩界面反应自发电池实验地球化学本实验以哈达门沟［１］及东坪金矿［２］为地质背景，研究钾长石岩中金矿化富集的物理化学条件。该区金矿既与早期变...     

岩盐及芒硝中各种化合物质量分数的计算

本文以等物质的量的反应规则建立了岩盐、芒硝中各种化合物的质量分数的计算公式。这些公式既符合法定计量单位的要求，又方便计算。     

Oxygen Isotope Exchange Kinetics Between Coexisting Minerals and Water in the Aral Granite Pluton of the Altay Mountains, Northern Xinjiang

Coexisting quartz, feldspar and biotite vary widely in their δ18O values and display a remarkable 18O/16O disequilibrium relation; especially, a quartz-feldspar reversal (△ 18OQUartz_feldspar< 0) exsists in the Aral granite pluton of the Altay Mountains, northern Xinjiang. The 18O / 16O exchange reaction definitely occurred between granite and water. Initial δ18O values of the granite and exotic fluid are evaluated by the mass balance consideration. The conventional method of discrimination between various magma derivations simply with δ18O values of either whole rock or separate minerals is misleading and unreliable. Experiments carried out by the authors show that the 18O / 16O exchange reaction is not accompanied by what geologists describe as petrological and mineralogical alteration effect. This decoupling relation implies that exchange reaction occurs at a relatively high temperature during subsolidus-postmagmatic cooling of magmas. The exchange mechanism is mainly diffusion-controlled. It is     

5－（4－羧基苯偶氮）－8－（对甲苯磺酰氨基）－喹啉与金显色反应研究及应用

以８－氨基喹啉为母体，合成了新试剂５－（４－羧基苯偶氮）－８－（对甲苯磺酰氨基）－喹啉（ＣＰＴＳＱ），研究了它与Ａｕ的显色反应，在ＣＴＭＡＢ存在下，于ｐＨ１０～１３的ＮａＯＨ介质中，ＣＰＴＳＱ与Ａｕ形成２：１紫蓝色络合物，最大吸收峰位于６１０ｎｍ，摩尔吸光系数１．０×ｌ０５Ｌ·ｍｏｌ－１·ｃｍ－１，Ａｕ含量在０～１．２ｍｇ／Ｌ内符合比尔定律。方法选择性好，灵敏度高，操作简便，已用于金矿石样品中Ａｕ的测定，结果满意。     

高温超高压下Ni40Mn30Fe30与叶蜡石反应的研究

本文对Ｎｉ４０Ｍｎ３０Ｆｅ３０合金与在不同焙烧温度下得到的含水叶蜡，在高温超高压下的反应进行了实验研究，温度测至１４２０℃，压是至５．５ＧＰａ，研究了该反应的物质－化学机制，以及反应速率与温度，压力，含水量等参数的关系，对高压下物质迁移运动的固有特征进行了探讨。     

A Study on the Geological—Geochemical Dynamics of Hydrothermal Ore Deposition as Exemplified by the Muping—Rushan Gold Deposit Belt,Eastern Shandong,China

This paper presents a method of establishing a hydrothermal ore-forming reaction system.On the basis of the study of four typical hydrothermal deposits,the following conclusions concerning geochemical dynamic controlling during hydrothermal mineralization have been sions concerning geochemical dynaamic controlling during hydrothermal mineralization have been drawn:(1)The regional tectonic activities control the concentration and dispersion of elements in the ore-forming process in terms of their effects on the thermodynamic nature and conditions of the ore-forming reaction system.(2)During hydrothermal mineralization the activites of ore-bearing faults can be divideb into two stages:the brittle splitting stage and the brittle-tough tensing stage,which would create characteristically different geodynamic conditions for the geochemical thermodynamic ore-forming system.(3)The hydrothermal ore-forming reaaction system is an open dynamic system.At the brittle splitting stage the system was so strongly supersaturated and unequilibrated as to speed up and enhance the crystallization and differentiation of ore-forming fluids.And at the brittle-tough tensing stage,the ore-forming system was in a weak supersaturated state;with decreasing temperature and pressure the crystallization of oreforming material would show down,and it can be regarded as an equilibrated state.(4)In the lates stages of hydrothermal evolution,gold would be concentrated in the residual ore-forming solution.The pulsating fracture activite in this stage led to the crush of pyrite ore and it was then filled with gold-enriched solution,forming high-grage“fissure”gold ore.This ore-forming process could be called the coupling mechanism of ore formation.     

蚀变岩中物质迁移的定量计算：以锡矿山锑矿床为例

本文提出了确定沉积岩蚀变作用过程中的不活动组分的方法，并以锡矿山锑矿床为例，定量计算了蚀变岩中各组分的带入带出量，研究表明：锡矿山锑矿硅化过程中ＴｉＯ２和Ａｌ２Ｏ３为不活动组；ＳｉＯ２，Ｋ２Ｏ，Ｎａ２Ｏ及锑，硫，坤，汞，铅和钡为带入组分；而ＣａＯ，ＭｇＯ，Ｆｅ２Ｏ３，ＭｎＯ及铜，锌为带出组分，锑，钡，硫，ＳｉＯ２和ＣａＯ有较大的带进或带出量，锡矿山锑矿床矿石矿物为单一辉锑矿可能是由于矿液中缺少其它