摘要
根据长期对华北地台金矿的研究 ,发现一系列有意义的地质地球化学特征并得出许多重要结论 ,如 :1.华北地台是由许多地体拼贴而成 ,如华熊 ,嵩箕 ,鲁西 ,胶北 ,胶南和黄海地体等 ;2 .基底地层年代学是确定地体类型的重要基础 .0 型地体是具有太古代绿岩带和早元古绿岩带 ;C 型地体祗具有太古代绿岩带 ,前者有利于金矿的形成 ;3.中生代华北地台构造环境是岩浆作用和成矿作用的决定因素 .这与中生代古太平洋板块和初始欧亚板块强烈挤压碰撞俯冲作用有联系 ;4 .主断裂系统是金矿床 ,矿田和矿带分布的主要因素 ;5.高级区域变质作用是金和成矿流体活动化转移的因素之一 ;6 .交代蚀变作用和它的分带是成矿模式的基础 ;7.花岗岩的岩浆作用和混合岩化作用是金和成矿流体活化转移的重要因素 ;8.Pb ,S ,O ,H ,C ,Nd和Sr同位素特征表明金和成矿流体的多来源性 ;9.形成于活动大陆边缘和造山带与金矿有关的钙 碱性煌斑岩来源于由板块 ,地体和板片俯冲作用引起的富集地幔 ;10 .根据与金矿有联系的热液成矿作用的温度一般可以划分三个阶段 ;其中 350℃～ 2
Based on the many years' research work of gold deposits in the North China Platform (NCP), we have discovered a lot of interesting features and came to many important conclusions, such as:1.North China Platform is composed of many terrenes, such as Huaxiong, Songgi, Luxi, Jiaobei, Jiaonan and Huanghai Terrene etc.Chronostratigaphy of basement is the important basis for division to the type of terranes. 0 type terrane possess Archean and Early Prototerozoic green stone belt; C type terrane only possess Archean green stone belt. The former favoured formation of gold deposits.2.The tectonic setting of the NCP in the Mesozoic is desisive factor for magmatism and metallogeny. This is genetically related to the subduction caused by the intense collision between the paleo Pacific Plate and initial Eurasia Plate in the Mesozoic Period.3.The evolution of tectonic setting in the eastern continent of China also determined the evolution of magmatism and metallogeneses of the NCP.4.The system of main faults is the main factor for distribution of gold deposits, orefield and metallogenic belt.5.The different types of gold deposits related to the Mesozoic granitoids and subvolcanics is inter related and inter depentdent.6.Metasomatic alteration and its zonation is the important base for the metallogenic model.7.Granitic magematism and migmatization are the important factors for mobilization of gold and metallogenic fluids.8.Isotopic features of Pb, S, O, H, C, Nd and Sr show that the gold and metallogenic fluids are from multiple sources.9.Calc alkaline lamprophyres, formed in the active continental margin and orogenic belt, related to gold deposits are come from enriched mantle caused by subduction of Plate, terrane or slab.10.The hydrothermal mineralizing processes related to gold deposits can be divided into 3 episodes. 350?℃～250?℃ is the main range for gold cocentration.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
2000年第2期133-139,共7页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金重大项目! (No :94880 10和 4973312 0 )
关键词
金矿床
地体构造
华北地台
成矿规律
Metallogeny
Terrane tectonis
Ductile shear zone
Metallogenic fluid
Mobilization
Organic compound
