山东龙口大园矿区金矿121号脉地质特征及成因浅析

Geological Characteristics and Origin of No.121 Vein in Gold Deposit in Dayuan Mine Area in Longkou of Shandong Province

山东龙口大园矿区金矿121号脉产于胶西北著名的玲珑金矿田北部,矿体直接产出于玲珑花岗岩体内,受NEE向压扭性断裂构造控制。矿床成因类型为中低温热液石英脉型。通过对矿床地质特征、矿体特征、矿石类型、围岩蚀变、找矿标志及矿床成因等方面的研究,对矿床成因进行分析,总结了成矿规律。玲珑帚状构造控制了该区金矿床的分布,NEE向断裂构造控制了矿体的产出,黄铁绢英岩化碎裂岩夹石英脉是找矿的直接标志,通过综合研究,在121号脉走向上有一定的找矿空间,在-400m深部以下亦是有利的找矿地段,为进一步勘查工作提供地质依据。

No.121 vein in Dayuan mine area in Longkou of Shandong province occurred in north of Linglong gold deposit in Jiaoxibei.Ore bodies directly occurred in Linglong granite body,and controlled by torsional fracture structures with the trend of NEE.The ore types are mainly beresitized cataclasite accompanying with quartz vein,and the genesis type is medium and low temperature hydrothermal quartz veins.Through study on Linglong gold field,from the aspects of strata,magmatic rocks and ore-controlling characteristics,characteristics of ore bodies and the genesis of the deposit have been analyzed,and the metallogenic regularity has been summarized.Linglong brush structure controlled the distribution of gold deposits in the area,and the ore bodies are controlled by the faults with the trend of NEE.Beresitization cataclastic rock with quartz vein is the direct sign of prospecting.Through comprehensive study,there are some prospecting space in No.121 vein,and there is also favorable for the following ore area in the deep part of -400 m.It will provide geological basis for next exploration in the future.