甘肃中川金铀矿床地质特征及成因讨论

中川金铀矿床位于礼县-白云-山阳深断裂西段膨大分支锐角夹持区，受印支期中川复式花岗岩体东外接触带中近南北向的断裂构造控制。通过对中川岩体的特征及含金、含铀性的论述和中石炭统地层含矿性的论述，认为中川金铀矿床的的主要控矿因素是断裂构造，铀源应来自中川岩体，金源应来自浅部地层；中川岩体是矿床形成的热源体。通过对矿床水文地质特征的论述，认为矿床经历了淋滤作用的改造。矿床的形成主要是由中川岩体的热驱动作用形成的，但后期经历了淋滤作用的改造，形成了复杂多变的矿体形态。星点状黄铁矿化可作为找矿标志。金矿与铀矿存在同带异位现象。

Geological Features and Genesis of Zhongchuan U-Au Deposit in Gansu Province

Zhongchuan U-Au deposit,located in the acute angle area of the western expandable faults of Shangy ang-Baiyun -Lixian, controlled by SN-striking faults in eastern area of Zhongchuan compound granites. Expounding the Zhongchuan rock features, U-Au-hosting property and ore-hosting of middle coal-controlling stratum, it thinks that the main element of Zhongchuan U-Au deposit ore-hosting are faults, the source of uranium should be form Zhongchuan rock, and the source of gold should be form the shallow stratum ; the source of heat formed by deposits Zhongchuan rock. Expounding the hydrologic geologic deposit features, it thinks deposit experienced thefihering transformation. And the driving action of Zhongchuan rock mainly formed the deposit, but after the filtering troms- fomation later, it formed the complicated and variable ore morphology. Speckled iron pyrites can serve as prospec- ting criteria U-Au deposit are sometimes in the same zone but in the different place.