GEOCHEMISTRY OF ELEMENTS AS EVIDENCE FOR SEDIMENTATION-SUPERIMPOSITION FORMING AISHANG TUNGSTEN DEPOSIT IN JIANGXI PROVINCE

By the study of the trace elements in the Zishan formation of lower Carboniferons occurring in the Aishang mining area and its surroundings, the present paper proves that the Zishan formation is rich in B, Ti, Cu, etc., and contains the derivative tungsten-bearing layers related to local accumulation of the heavy minerals in genesis. The superimposition by the late granite has made the tungsten-bearing layers a strata-bound tungsten deposit. It has been concluded that the fundamental tungsten-bearing formation and the Zishan formation give tungsten and essential associated elements such as 13, Ti and Cu for forming the deposit, while the late granite supplies heat energy and superimposed composition such as Be and F.     

低温热液条件下有机质富集金机理的实验研究

本文在低温(40—200℃)热液条件下,对不同成熟度的有机质与含金溶液[AuCl_4~-,Au(HS)_2~-]之间的相互作用进行了实验研究。研究观察到在低温热液体系中有机质直接参与了从含金溶液中将游离的金离子固定下来的作用。有机质从溶液中富集金可认为有两种不同性质的作用:第一种是在早期沉积成岩作用阶段(T<120°)时,有机质与含金热液主要发生凝聚作用,使溶液中的金由离子状态从无机相转化到有机相中;第二种是在变生或变质作用阶段(T>120℃)时,有机质与含金热液主要发生氧化还原沉淀作用,还原作用的结果导致元素金的沉淀,同时有机质被氧化、分解。     

Ore-controlled Mechanism and Geochemical Characteristics of Gold-bearing Formation in Northwest Jiangxi Terrain

Based on the geological and geochemical studies on the Middle Proterozoic Jiuling Group in the Northwest Jiangxi Terrain, it is ascertained that this group is a kind of Au-bearing formation with Au-Ag-As association, and the volcanism is the key to its foundation. The Jiuling Group can be divided into two geochemical groups: high-Au layers and low-Au layers, which is due to the inhomogeneous metamorphic reformation. The discriminant functions F_1& F_2 can be established by means of Au, Ag, As, Ti, Cr, V, etc. eleven elements, and the diagram of F_1-F_2 is the distinguishing sign of the Au-bearing formation. Based on the systematic studies on two types of gold mineralization, namely, solo gold with metamorphic fluid and Au, Ag, etc. polymetallic association with magmatic fluid, the authors establish the metallogenic model of gold deposits in the area.     

华南含钨建造的地球化学研究

通过对华南代表性的地层地球化学研究,证实了华南成矿区域中合钨建造的存在。目前已确立的含钨建造主要有元古界、寒武系、泥盆系和石炭系。钨在不同构造带及不同时代含钨建造中的含量各有不同,但共同的地球化学特点是钨的丰度较高,具有一定的微量元素组合和分布型式。钨在含钨建造中的初步富集为华南地区钨的大规模、多样性的矿化奠定了物质基础。     

支持向量回归算法应用于分光光度法同时测定安替比林、巴比妥和氨基比林

采用均匀设计法制备不同含量配比的安替比林、巴比妥、氨基比林校正集样品,用化学计量学方法--支持向量回归(SVR)方法建立校正模型,并对安替比林、巴比妥和氨基比林的模拟样品及安痛定注射液样品进行测定.结果表明,三种成分的加标回收率均在98%～104%之间,测定结果的相对标准偏差为0.48%～1.24%.     

江西隘上沉积-叠加成因钨矿床的元素地球化学判据

本文通过对隘上矿区石炭系梓山组和外围有关地层的微量元素研究,揭示了本区梓山组是一个富含硼、钛和铜等元素的地层,并含有与重砂矿物局部富集有关的衍生含钨层位.后期花岗岩的叠加使含钨层位形成层控钨床.研究结果表明,基底含钨建造和梓山组地层为成矿床提供了钨和主要伴生元素硼、钛和铜,后期花岗岩则为成矿提供了能量和铍、氟等叠加组份。     

GEOCHEMISTRY OF PRE-MESOZOIC GOLDBEARING FORMATIONS IN SHAOXINGLONGQUAN UPLIFT REGION, ZHEJIANG PROVINCE

The geochemistry of the main country rocks of gold deposits in Shaoxing-Longquan uplift region has been systematically studied in this paper. The authors believe that the Proternzoic Shuangxiwu group is the primary gold-bearing formation in this region and the Sinian-Cambrian Chencai group and the Precambrian Zuoxi migmatized quartz-diorite are the derivative gold-bearing formations. The genesis of rocks, content distribution features of gold and silver, characteristics of associated trace elements and other geochemical features in these formations clearly show a relationship of inheritance with evolution. By means of metamorphic-solution and volcanic-solution or/and other geological actions, these gold-bearing formations supplied the necessary ore-forming materials for the gold deposits in this region.     

STUDIES ON GEOCHEMISTRY OF TUNGSTEN-BEARING FORMATIONS IN SOUTH CHINA

The studies on the representative stratigraphic geochemistry have already verified the existence of tungsten-bearing formations in the metallogenetic province of South China. Up till now, it has been established that there are tungsten-bearing formations mainly in the Proterozoic erathem, Cambrian, Devonian and Carboniferous systems. All of them are commonly characterized by high tungsten abundance, certain trace elements combination and distribution type although the tungsten contents of the tungsten-bearing formations are different from the tectonic elements and the passage of time. The preliminary concentration of tungsten in the tungsten-bearing formations has laid the foundation for extensive and diverse tungsten mineralizations in South China.     

赣西北地体含金建造地球化学特征及其控矿机制

通过对赣西北地体中元古界九岭群进行的地质地球化学研究,确定该群为一Au-Ag-As-(Sb)组合的含金建造,火山作用在含金建造形成过程中起着关键作用。九岭群含金建造划分为高Au和低Au两类地球化学群,不均匀变质改造作用是二类地球化学群形成的主导因素,可利用Au, Ag, As, Ti, Cr, V等11种元素建立判别函数F_1和F_2,构造作为含金建造判别标志的F_1—F_2图解,系统探讨了区内变质热液型单金矿化和岩浆热液叠加型Au, Ag为主多金属矿化等二类金矿化类型,建立了本区金矿床的成矿模式。     

浙江绍兴-龙泉隆起带前中生界含金建造的地球化学

本文对浙江绍兴-龙泉隆起带中主要金矿床的围岩进行了系统的地球化学研究,确定了该区存在有前中生界的原始含金建造——元古界双溪坞群以及衍生含金建造——震旦-寒武系陈蔡群和前寒武系左溪混合岩。它们在岩石成因、金银含量及分布、微量元素组合及特征等方面,均具有一定的继承和演化关系。通过变质-热液、火山-热液等地质作用,含金建造为隆起带中各类金矿床的形成提供了必要的成矿物质。