胶东河西断裂带控矿特征与金矿成矿规律

发布时间：2018-04-13 06:46

本文选题：河西断裂 + 控矿特征　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：焦家断裂带在胶东地区断裂带中的地位举足轻重,其严格控制着在断裂上分布的多个矿床。焦家断裂带是地区内规模较大的断裂,根据断裂的规模和特点可将焦家断裂划分为多个级别。其中在焦家主断裂带上分布的矿床主要有:姚家金矿、新城金矿、东季金矿、焦家金矿、马塘金矿、寺庄金矿;而在焦家断次级断裂带上分布的金矿床则包括:望儿山断裂上的陈家金矿、上庄金矿、河东金矿、付家金矿、望儿山金矿,以及在河西断裂带分布的河西金矿。焦家断裂带上分布的不同级别的断裂对矿床控制作用既有共性,又有个性,其共同组成了焦家断裂系统独特的控矿特征。本文主要以河西断裂和其次级断裂组成的河西断裂系统为研究对象,理清其控矿特征,同时对比这些次级断裂控矿规律与焦家主断裂控矿特征的共性和特性。在此基础上,结合前人对焦家金成矿带的研究,归纳出受河西断裂系统控制的河西金矿的成矿规律。焦家断裂对其上分布的金矿床控制作用显著,相比于其它控矿因素,控矿断裂在对矿床的控制作用中占主导地位。作为焦家断裂的次级断裂,河西金矿同焦家主断裂有共同的控矿特征,但对比于主断裂,河西断裂在控矿特征上具有自己的特殊性:河西断裂与侯家断裂形成独特的反“S”型构造;发育有独特的节理裂隙密集带构造,大量矿体赋存在其中;很多矿体表现出细脉、网脉状矿化的特点,这与焦家主断裂上占绝大多数的浸染状矿化区别明显,前者在节理裂隙密集带中集中分布;钾化现象更明显,许多矿体的在钾化带上分布;河西金矿同焦家式破碎带蚀变岩型金矿在成矿规律方面差别不大,成矿阶段都是4个阶段。成矿温度为中温,成矿时代为白垩纪。硫主要源于地幔岩浆并可能混有海水。
[Abstract]:Jiaojia fault zone plays an important role in Jiaodong fault zone, which strictly controls the distribution of many deposits on the fault.Jiaojia fault zone is a large scale fault in the region. According to the scale and characteristics of the fault, Jiaojia fault can be divided into several grades.The main deposits distributed in the Jiaojiazhou fault zone are: Yao gold deposit, Xincheng gold deposit, Dongji gold deposit, Jiaojia gold deposit, Matang gold deposit, Sizhuang gold deposit;The gold deposits distributed on the secondary fault zone of Jiaojia fault include Chenjia gold deposit, Shangzhuang gold deposit, Hedong gold deposit, Fujia gold deposit, Wangershan gold deposit and Hexi gold deposit distributed in the Hexi fault zone.The different grades of faults distributed on the Jiaojia fault zone have both commonness and individuality in controlling the deposit, which together constitute the unique ore-controlling characteristics of the Jiaojia fault system.This paper mainly takes Hexi fault system composed of Hexi fault and secondary fault as the object of study, clarifies its ore-controlling characteristics, and compares the generality and characteristics of these secondary fault ore-controlling laws with the ore-controlling characteristics of Jiaojiayi fault.On this basis, combined with the previous study of Jiaojia gold metallogenic belt, the metallogenic law of Hexi gold deposit controlled by Hexi fault system is concluded.Compared with other ore-controlling factors, the ore-controlling fault plays a dominant role in controlling the ore deposit.As the secondary fault of Jiaojia fault, Hexi gold deposit has the same ore-controlling characteristics, but compared with the main fault, Hexi gold deposit has the same ore-controlling characteristics.The Hexi fault has its own particularity in ore-controlling characteristics: the Hexi fault and the Houjia fault form a unique anti-" S "type structure; there are unique joint-fissure dense zone structures in which a large number of orebodies occur; many orebodies exhibit veinlets.The characteristics of reticular vein mineralization are distinct from the disseminated mineralization, which accounts for the majority of the main faults of the Jiaojia family. The former is concentrated in the joint and fissure dense zone, the potassium mineralization is more obvious, and many orebodies are distributed in the potash zone.There is no significant difference in metallogenic regularity between Hexi gold deposit and Jiaojia type broken zone altered rock type gold deposit. The metallogenic stages are all four stages.The mineralization temperature is medium temperature and the metallogenic age is Cretaceous.Sulfur is mainly derived from mantle magma and may be mixed with seawater.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.51

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