Geochemical Studies on Au Distribution and Mineralization in the Northwest Jiangxi Terrain

The Middle Proterozoic Jiuling Group,one of the most important geologic unit in the Northwest Jiangxi Terrain,is a kind of Au-bearing formation with a Au-Ag-As association,and its geotectonic setting belongs to the ACM area.Granitification can supply Au with favorable complexing agents.Later granitification os of much more significance in mineralization.Regional Aumineralization includes two types;metamorphic hydrothermal solo-Au mineralization in the northern part and magma gydrothermal superimposed polymetallic mineralization with Au,Ag,etc,being dominant in the southern part.Regional exploration should center aroud the Jiujing Group,small granite bodies of later periods and fault structures,while paying attention to the anomalies of trace elements such as Au,Ag,As,Pb,Zn,etc.     

湖南益阳—沅陵一带金矿床的成矿作用地球化学

通过对典型金矿床的研究，作者将湖南益阳－沅陵金矿密集区内的金矿床分为单金、金－锑、金－钨和金－锑－钨四种类型，并分别阐述了不同类型金矿床形成的物理化学条件，成矿物质、成矿流体、成矿能量的来源，成矿元素活化转移和沉淀的机制，在对矿床地球化学特性进行系统研究的基础上，作者提出了区内金矿床的成矿作用，实际上是开放体系中低温水／岩反应过程的认识，并建立了相应成矿作用的地球化学模式。     

广东潮安厚婆坳锡矿床成矿物质来源及物理化学条件研究

通过厚婆坳锡石硫化物矿床地层元素含量、花岗岩特征、稳定同位素和包裹体成分的研究,模拟了沉积岩中锡的淋滤实验;探讨矿床的物质来源和成矿物理化学条件。认为兰塘群为一衍生含锡建造,在花岗岩浆的热动力驱动下,在混合水的成矿热液作用下,地层中成矿元素活化转移,以亚锡氯络合物形式迁移,后金属络合物不稳定而分解,沉淀成矿。     

钨在表生作用中的富集模拟实验

The adsorption of tungsten on ferric oxide, manganese dioxide, slate, carbonaceous slate,kaolinite and bentonite in the solutions of pH 4---9 at atmospheric temperatures and pressures has been examined. Experimental results show that acidic solution is in favour of the adsorption of tungsten on the adsorbents. The adsorptivities of these adsorbents for tungsten decrease with increasing pH values for the solutions. Of all the substances joining the expe-riment, Fe2O3 is possessed of the highest adsorptivity and clays of the lowest. Their adsorptivities reduce in the order of Fe2O3, MnO, carbonaceous slate, SiO2, slate and clay in neutral and acidic solutions and of Fe2O3, carbonaceous slate, MnO, slate, clay and SiO2 in alkaline solutions. The adsorption of tungsten on the adsorbents and its pH dependence can be explained by the presence of W(VI) complex cations. The increase of pH results in the reduction of their quantities in the solutions with concomitant diminution of adsorptivity.Experimental data indicate that W shows a strong tendency of concentration during supergene processes in tungsten geochemical provinces. Therefore, it is of particular significance in the formation of tungsten-bearing formations.     

粤东沿海一带中生代含锡建造的地球化学

该区位于粤东南燕山再生地槽区、海丰—丽水大断裂南侧的潮安—海丰一线。区内大面积分布着上三叠—下侏罗统蓝塘群地层,为一套巨厚的海相和海陆交互相砂页岩沉积;同时分布有上侏罗统的高基坪组火山岩。其主要构造线方向为平行海丰—丽水大断裂的NE向构造,岩浆岩主要为燕山晚期花岗岩。区内分布着众多的锡石硫化物、锡石石英硫化物、锡石     

柿竹园钨钼铋锡(铍)矿床的矿物学和成矿元素的赋存形式

柿竹园为一特大型的含有云母-石英网脉的矽卡岩型W、Mo、Bi、Sn、Be矿床。有关该矿床的地质和成矿作用问题,已有专文论述。然而由于矿体中矿物颗粒细小、分离困难,因而对矿床矿物学、矿物化学和成矿元素赋存形式的研究,至今尚较薄弱。本文就这方面工作所取得的成果作一综述,为矿床的综合利用、合理开发提供基本资料依据。     

略談貴州西部鉛鋅礦床形成的幾點規律

我們学地质的人,一提到铅鋅等有色金属矿床,有時会產生这样一个观念,總觉得沒有什么規律可寻,不像煤、铁礦床那样整齐和偉大。当然我们要像找煤铁那样便利的条件是没有的,不过铅鋅礦床的富集,也还是有着它們特殊的規律,根据礦床的各种现