摘要
玲珑金矿主要受北北东向、北东向两组断裂构造控制,主要矿体均分布于两组断裂的复合部位,两组断裂的形成及其运动性质与郯庐断裂的活动密切相关。在中生代早期,北北东向的玲珑断裂主要为左行平移运动,北东向的破头青断裂则为压性兼具有左行平移性质;早白垩世晚期,北北东向断裂作右行运动,而北东向断裂则作左行运动,反映了断裂活动的多期性和复杂性。断裂构造岩的特征显示控矿断裂经历了韧性变形和脆性变形两个阶段,矿体赋存于断裂构造主裂面的下盘,上盘一般无工业矿体赋存。
The linglong goldmine is mainly controlled by the NEE and NE treading faults, whose forming and motion features are closely related to the activity of Tanlu Fault. The main ore bodies are concentrated on the combination parts of two groups of faults. In the early Mesozoic, this area was affected by the Tanlu Fault. The NNE treading Linglong Fault is a sinistral strike-skip moving fault, while the character of the NE treading Podouqing Fault is mainly squeezable and sinistral movements. In the late Early Cretaceous, the NNE treading faults was moving dextrally, while the NE treading fault was on sinistral movement. All these suggest the multi-periodicity and complexity in the motion of faults. The characters of tectonic rocks imply that the ore-control fractures have suffered two stages of transformation-the ductile stage and the brittle stage. Ore bodies are mainly occurred in lower plates. The scale of ore body and ore-control fracture are positively correlated.
出处
《高校地质学报》
CAS
CSCD
2003年第3期420-426,共7页
Geological Journal of China Universities
关键词
玲珑金矿田
控矿构造
构造岩
形成机制
Linglong goldfield
ore-control fracture
tectonic rocks
formation mechanism
