地质与勘探2012，Vol.48Issue(3)：538-545,8.
岩脉的侵位机制对成矿作用的约束——以内蒙古大井锡多金属矿床为例
Constraints of Dike Emplacement Mechanism on Metallogenesis： An example from the Dajing Tin-polymetallic Deposit, Inner Mongolia
摘要
Abstract
Mechanism of dike emplacement is significant to understanding intrusion processes of dikes and ore veins. This paper describes the mechanism of dike emplacement, and takes the Dajing ore deposit as an example to discuss the relationship between dikes and ore veins. Our study shows that dikes and ore veins in the region are mainly under the NW-SE directed compressive stress. During the period from the Hercynian to the Yanshanian, the regional stress field remained unchanged,while the block Linxi had a clockwise rotation. Within the Dajing ore deposit area, the NW-SE directed compressive stress was also dominated, and a similar rotation occurred. Thus,we infer that the magnitude of compressive stress declined from SW to NE in the Dajing ore deposit area, and that the amount of uplift and erosion also decreased in this direction. In the whole, dikes intruded into the existing fissures and ore veins took the space of dikes, with local intercalation between dikes and ore veins. We suggest that the western portion of this ore field has a greater poten- tial in search for porphyry-type deposits.关键词
岩脉/矿脉/侵位机制/应力场/大井锡多金属矿床Key words
dike/ore veins/emplacement mechanism/stress field/Dajing tin-polymetallic deposit分类
天文与地球科学引用本文复制引用
李德东,王玉往,王京彬,王莉娟,龙灵利,廖震..岩脉的侵位机制对成矿作用的约束——以内蒙古大井锡多金属矿床为例[J].地质与勘探,2012,48(3):538-545,8.基金项目
全国危机矿山接替资源找矿项目（200699105）资助成果 （）
