胶西北海岸带基岩矿床分布富集规律及典型矿床主要特征  

Distribution and enrichment law of bedrock deposits in the coastal zone of northwest Jiaodong and main characteristics of typical deposits

作　　者：盛建华 韩代成 丁正江 SHENG Jianhua;HAN Daicheng;DING Zhengjiang(Yantai Natural Resources and Planning Bureau,Yantai 264003,China;Shandong Institute of Geological Sciences,Jinan 250013,China;No.6 Institute of Geology and Mineral Resources Exploration of Shandong Province,Weihai 264209,China)

机构地区：[1]烟台市自然资源和规划局,山东烟台264003 [2]山东省地质科学研究院,山东济南250013 [3]山东省第六地质矿产勘查院,山东威海264209

出　　处：《中国矿业》2023年第S01期69-75,共7页China Mining Magazine

摘　　要：胶西北海岸带研究区70%以上被第四系覆盖,矿化信息被屏蔽和削弱,增加了发现新矿体的难度。分析研究认为,区域内构造格架自北而南呈盆-岭-盆相间出现,受该构造格架控制,区域内煤矿、金矿、铁矿按自北而南呈“北煤、中金、南铁”的“纬度分带”式产出,煤矿主要产出于区域北部的古近纪五图群地层中,属煤层与油页岩互层的湖河三角洲沉积建造;金矿主要产出于区域中部的侏罗纪玲珑花岗岩、郭家岭花岗岩侵入岩体中,是大规模岩浆活动和广泛的伸展拆离的产物;铁矿主要产出于区域南部的古元代粉子山群小宋组含铁岩系中,属区域变质作用密切相关的沉积变质铁矿床。研究区海底基岩矿床不是独立的矿床,而是与陆地矿床相连,是陆地矿床随地质构造向海洋延伸的一部分。通过研究第四系覆盖下的基岩分布规律、基岩矿床分布规律和总结海岸带基岩矿床成因规律性特征,对加强重点成矿区找矿针对性,更好地指导和推动胶西北海岸带区域找矿进展,实现产学研的紧密结合具有重要意义。The study area of northwest Jiaodong coastal zone is more than 70%covered by Quaternary system,the mineralization information is shielded and weakened.Making it more difficult to find new ore bodies.According to the analysis and study,the tectonic framework in the region appears from north to south in an alternating pattern of basin-ling-basin.Under the control of the tectonic framework,the coal,gold and iron mines in the region are produced in a latitudinal zonation pattern of“north coal,middle gold and south iron”from north to south.The coal mines are mainly produced in the Paleogene Wutu Group strata in the north of the region,which belong to the sedimentary formation of lake river delta in which coal seam and oil shale are interbedded.The gold deposit is mainly produced in the Jurassic Linglong granite and Guojialing granite intrusive rock mass in the central part of the region,which is the product of large-scale magmatic activity and extensive extensional detachment.The iron ore is mainly produced in the iron bearing rock series of Xiaosong Formation of Palaeoproterozoic Meizishan Group in the southern part of the region.It is a sedimentary metamorphic iron deposit closely related to regional metamorphism.The submarine bedrock deposit in the study area is not an independent deposit,but connected with the terrestrial deposit,which is a part of the terrestrial deposit extending to the ocean along with the geological structure.By studying the distribution law of bedrock and the distribution law of bedrock deposits covered by the Quaternary system,and summarizing the genetic regularity of bedrock deposits in the coastal zone,it is of great significance to strengthen the prospecting pertinency of key metallogenic areas,guide and promote the regional prospecting progress in the northwest coastal zone of Jiaodong,and realize the close combination of production,university and research.

关 键 词：基岩矿床 分布富集规律 胶西北 海岸带 矿床特征 

分 类 号：P617[天文地球—矿床学]