摘要
香花岭穹隆是一个岩浆底辟伸展构造，它的结构与变质核杂岩、剥离断层的结构相似，由核部、滑动系统及盖层构造三部分组成，核部为隐伏花岗岩体和寒武系变质岩系。滑动系统为隐伏岩体与其上覆盖层之间的高温韧性剪切带和沿泥盆系与寒武系之间的不整合面发育的剥离断层。盖层构造为发育于泥盆系一石炭系中的阶梯状缓倾斜正断层和大量层间滑脱断层，香花岭岩浆底辟伸展构造是在区域伸展作用的背景下，由岩浆底辟上隆，并引起上覆盖层下滑而形成的。香花岭锡、铬、锌多金属矿的矿田、矿床及矿体构造都受该伸展构造控制。
The Xinghaling arch belongs to a magmatic-diapiric extensional tectonics,composed ofthree parts,namely the core,the slip-system and the covering struta structures,and its struc-tural characteristics more or less resembles that of metamorphic core complex and detachmentfault.The core is consisted of the hidden granite-body and Cambrian metamorphic series.Theslip-system being a detachment fault developed along the unconformity surfase between Devoni-an and Cambrian systems,is a high-temperature ductile shear zone between the hidden granite-body and the overlying corering strata.The covering- strata structures are step-shaped gen-tly-dipping normal faults and numerous interformational detechment faults developed in the De-vonian-carboniferous strata.On the tectonic setting of regional extending,the Xianghaling gran-itio-diapiric extensional tectonics is formed by the uplift of magmatic diapire and the down-slipping of overlying covering strata induced by the uplifting. The ore- field,ore-deposit and ore- body structures of Xianghaling Sn, Pb and Zn polymetal deposit are all controlled by the exten-sional tectonics mentioned above.
出处
《矿产与地质》
1994年第2期88-92,共5页
Mineral Resources and Geology
关键词
控矿构造
岩浆底辟
伸展构造
Magmatic-diapiric extensional tectonics,Ore-controlling structure,Xianghaling,Henan
