摘要
文中根据硅铁矿层的褶皱形态、复合关系等确定迁安铁矿区在中元古代之前发生过6期褶皱变形,叙述了这6期褶皱的特征和分布,讨论了褶皱的成因。区内各期褶皱形态演化规律反映了变形过程中岩石塑性有规律递减的特点。这一演化规律对研究早前寒武纪地区褶皱变形和指导该区找矿工作有重要意义。
<ABSTRACT>
According to the fold forms and their compounding relations of the ferrosilicium layer
in Qianan iron ore area, six phases of folding had taken place before middle Proterozoic
Era. The characteristic and distribution of the six phase folds in Qianan area are described,
and the genesis of fold has been discussed. The evolutional regularity of the fold forms of
each phase shows that the plasticity of the rocks decreased regularly in the deformation pro-
cess. This has an important significance for the study on fold deformation and for the
prospection of ore deposit in early Precanbrian rocks.
出处
《现代地质》
CAS
CSCD
1990年第3期60-69,共10页
Geoscience
关键词
早前寒武纪
铁矿层
褶皱
变形面
: Precambrian, iron ore layer, folds deformation, deformationplane, compounding
