摘要
通过对典型金矿成矿动力学研究 ,探讨了成矿元素活化、迁移、富集的规律 ,认为 :( 1 )早期的韧性剪切活动使断裂带处于高应力、高能量区 ,原有的物质平衡被破坏 ,成矿物质重新分配 ,Au、 Ag等成矿元素并没有在此发生富集 ,反而发生贫化 ;( 2 )晚期的韧脆性—脆性活动使断裂带处于一个相对低应力、低能量的开放环境 ,Au、Ag等成矿元素随成矿流体从围岩或深部运移到断裂带 ,并在此富集成矿。
With the study of ore- forming kinetics of northwest Jiaodong area and typical gold deposit,the regularities of activity,movementand concentration of ore- forming elements are discussed.Some results are presented:( 1 ) in early period,the fracture is ductile,it is in an environment of high- pressure and high- temperature,the ore- forming materialsdid notconcentrate butbecame poor,( 2 ) in late period,fractures were brittle or brittle- ductile,it is in an environmentof low- pressure,low- energy and low- temperature,the ore- forming materials concentrated and precipitated to form the Jiaojia gold deposit.
出处
《现代地质》
CAS
CSCD
北大核心
1999年第4期425-431,共7页
Geoscience
关键词
构造应力场
韧性剪切带
断裂带
金矿床
成矿控制
structural stress field,ductile shear zone,brittle fracture belt,Jiaojia gold deposi
