| 阜平猴石顶太古界褶皱的岩石磁性组构 |
| |
| 引用本文： | 贺绍英,金龙国,孙世伟,孙爱秋.阜平猴石顶太古界褶皱的岩石磁性组构[J].地球物理学报,1988,31(6):672-677. |
| |
| 作者姓名： | 贺绍英 金龙国 孙世伟 孙爱秋 |
| |
| 作者单位： | 1. 中国地质科学院地质研究所 北京;
2. 地质矿产部地球物理地球化学勘查研究所 河北廊坊 |
| |
| 摘 要： | 猴石顶太古界重褶皱位于阜平太古宙穹状复合褶皱群中一个钩状褶皱的“钩子”部位。其中一层斜长角闪岩标志层的岩石磁性组构的分布情况为:1.在翼部的磁化率量值椭球是压扁形的,磁性叶理面的方向与变质层面及片麻理的方向基本一致,表现为向北西倾斜的倒转褶皱;2.在太古宙再次变形阶段所形成的转折端部位,磁性叶理面的走向变化较大,并出现拉长形的磁化率量值椭球,反映了经受过拉张作用的变形和多于一次的不同方向应力的作用;3.西翼的磁性线理值与磁性叶理值以及磁化率各向异性度都大,反映它经受过较强的剪切应力与压应力的作用;4.磁性线理主要倾向北半球,而且部分磁性线理近南北方向分布。 推测猴石顶重褶皱可能处于向北倾伏的主体构造的东侧。 上述岩石磁性是由自行设计的静态测量方法,用国产的数字式无定向磁力仪测定的。
|
| 关 键 词： | 磁性组构 重褶皱 太古界 |
| 收稿时间： | 1987-01-10 |
THE MAGNETIC FABRIC OF ROCKS OF THE HOUSHIDING ARCHEAN FOLD |
| |
| HE SHAO-YING JIN LONG-GUO SUN SHI-WEI.THE MAGNETIC FABRIC OF ROCKS OF THE HOUSHIDING ARCHEAN FOLD[J].Chinese Journal of Geophysics,1988,31(6):672-677. |
| |
| Authors: | HE SHAO-YING JIN LONG-GUO SUN SHI-WEI |
| |
| Institution: | 1. Institute of Geology, C. A. G. ;
5. ;
2. Institute of Geophysical and Geochemical Exploration, M. C. M. R. |
| |
| Abstract: | The Houshiding Archean repeated fold within the Fuping domal composite fold group is located in the "hook" of a "hook-like" fold.The distribution of the magnetic fabric of its plagioclase hornblendite marked bed may be described as follows: 1. The magnetic magnitude ellipsoids are oblate in the wings and the magnetic foliation and the plane of metamorphic bedding and gneissosity are basically coincident. These represent an overturned fold dipping in NW. 2. In the turning corner of syn-form fold originated in the further deformation stage of Archean cycle, the magnetic foliation trend changes and prolate magnetic magnitude ellipsoids are developed. These reflect that this part underwent stretching deformation or affected by stresses in different directions more than once. 3. In the west wing, the magnetic lineations, foliations and anisotropies are larger. These reflect that the west wing had been affected by stronger shear stress and pressure. 4. The magnetic lineations mainly dip to the north hemisphere and part of them developed near south-north direction.It is inferred that the Houshiding repeated fold may be located in the east side of a main structure plunging towards north.The magnetic properties as mentioned above were measured in a steady magnetic field by an astatic magnetometer designed by- ourself. |
| |
| Keywords: | Magnetic fabric Folded fold Archean |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
