Origin of petrofabrics and magnetic anisotropy in ordinary chondrites
Origin of petrofabrics and magnetic anisotropy in ordinary chondrites
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普通球粒陨石中石油结构的起源和磁各向异性
DOI：
10.1111/j.1945-5100.1988.tb00909.x
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
G. Nord
中科院分区：
文献类型：
--
作者：
D. Sneyd;H. McSween;N. Sugiura;D. Strangway;G. Nord
- 本文测定了15种普通花岗岩的三维有限应变和磁化率各向异性。应变轴和磁椭球的大小和方向大致相关。这些椭球体的形状通常是扁球体，定义了一个占主导地位的叶理和弱线理。这些特征表明变形涉及单轴压实。单轴变形的程度与冲击强度相关，如光学，TEM和化学标准。这些数据，加上缺乏叶理和变质历史之间的关系，表明动态过程，即，冲击，产生的平面变形组构的岩石。
— Three-dimensional finite strain and magnetic susceptibility anisotropy have been determined for 15 ordinary chondrites. The axes of strain and magnetic ellipsoids roughly correlate in both magnitude and orientation. The shapes of these ellipsoids are generally oblate spheroids that define a dominant foliation and a weak lineation. These characteristics suggest deformation involving uniaxial compaction. The degree of uniaxial deformation correlates with intensity of shock, as indicated by optical, TEM and chemical criteria. These data, plus the lack of a relationship between foliation and metamorphic history, indicate that dynamic processes, i.e., impacts, produced planar deformation fabrics in chondrites.