胶东唐家沟金矿床矿化富集规律探析

Priamry Analysis on Metallogenic Enrichment Regularity of Tangjiagou Gold Deposit in Jiaodong Area

摘要:

唐家沟金矿为胶东牟平乳山金矿带西南段的一个中型金矿床。矿区内出露地层主要为古元古代荆山群变质岩及新生代第四系，构造以古元古代褶皱构造和中生代断裂构造为主，其中含金矿化蚀变带受NNE向断裂控制。主要矿体呈NNE向展布，矿石类型主要为黄铁矿化石英脉和黄铁矿化碎裂岩，主要矿体厚度与品位呈正相关关系，矿化具多期活动特点。研究发现控矿构造与其他构造交会处以及控矿构造的拐弯处是储矿的有利部位，矿化蚀变叠加地段，预示着深部成矿可能性极大。找矿预测NNE向金矿化断裂构造与硫化物富集带及隐伏断层交会部位、残留荆山群地层与侵入岩接触部位为成矿的有利地带。

Abstract:

Tangjiagou gold deposit is a medium-sized gold deposit in southwest of Mouping-Rushan gold belt in Jiaodong area. Its main overlying layers are metamorphic rocks in Proterozoic Jingshan group, Cenozoic and Quarternary. Structures are mainly composed of Paleo-proterozoic fold structures and Mesozoic faults. Among them, gold-bearing mineralization belts are controlled by fractures with the trend of NNE. Main ore bodies are distributed in the trend of NNE, and ore types are mainly pyritized quartz vein and pyritized cataclasite. The thickness of main ore bodies has a positive relation with grade, and mineralization has the characteristics of multi-stage activities. It is found that the intersection areas of ore-controlling structures and other structures and the corners of ore-controlling structures are favourable ore-contained places, while mineralized alteration superposition areas have great deep prospecting potentiality. It is predicated that intersection areas of gold mineralization fractural structures with the trend of NNE, sulfide enrichment belts and hidden faults, as well as iron and gold mineralization belts, and the contact areas of Jingshan group are metallogenetic favorable zones.