摘要
辽宁弓长岭铁矿不仅发现较早、规模较大、开采历史较长,而且向下延深较大且富铁矿增多。针对弓长岭二矿区的构造解剖研究表明,二矿区至少经历了4期构造变形:第一期为小型塑性流变褶皱,第二期为区域规模的倒转同斜褶皱,第三期属于横跨叠加褶皱,第四期为区域规模的隆升。伴随着四期褶皱作用的断裂构造,从早到晚,则表现为韧性剪切带-脆韧性剪切带-韧脆性剪切带-脆性破裂。构造变形对铁矿的形成有一定的控制作用。
Gongchangling iron deposit is in large size and discovered earlier with a long mining history. To depth ore gets rich. Structural analysis shows that the second mining district was exposed to, at least 4 deformation episodes. The first episode is small plastic flowing deformation of folds, the second episode regional inverted isoclinal folds, the third episode cross overprinting fold, the fourth regional uplift. The four episodic deformations were accompanied by ductile shear zone which is characterized by ductile shear zone-brittle-ductile zone-ductile-brittle zone-brittle fractural zone from early to late. The deformation shows a certain control on formation of the iron ore.
出处
《地质找矿论丛》
CAS
CSCD
2013年第2期167-175,共9页
Contributions to Geology and Mineral Resources Research
基金
我国典型金属矿科学基地研究项目(编号:200911007)
国家自然科学基金项目(编号:40872137)联合资助
关键词
构造解剖
褶皱构造
断裂构造
构造控矿
鞍本地区
structural analysis
fold
fracture
structural control on ore
Anshan-Benxi area
