摘要
通过对锦屏磷矿的构造研究,作者提出锦屏矿区构造为一翻卷褶皱,并用“通用座标系”方法求解了翻卷轴线的产状,恢复了翻卷前的构造位态。表明其构造与区域构造的一致,同时也解释了两翼不同矿体的构造特征。
It is generally considered that there is a overturned anticline in the Jinpin phosphorus deposit. Nevertheless,the conclusion can not explain why the two wings of overturned anticline are of quite different features in both orebody and structure,and why there is a uncoodination between the overturned anticline and wide regional structural framwork.Based on the research results of the ‘general geological coordinate system’,created by the author before,the paper considers the structure of Jinpin deposit as a rolled down fold,and calculated the rolling axis and returns the rolled down fold to its initial state.So,the deformation of Jinpin deposit can be described as foll- owing stages.Firstly,the strata was compressed to be a anticline with nearly vertical axis face in S-N structural stress field.Secondly,owing to the balance of regional stress and the existance of rigid rock block in the centre of Jinpin deposit,the formed anticline was rolled clockwise around a axis of 48.6°-42.9°down to the present state.Originally,the returned state is identified with the regional structures and can explain the differenes between two wings.
出处
《江苏地质》
1990年第4期21-26,共6页
Jiangsu Geology
