Fissures of the Jilin meteorite
Observations with the naked eye and a microscope revealed that there are many fissures in the Jilin meteorite. They may be divided into two kinds; one is filled with dark material and the other is not. The former includes shear fissure and tension fissure. The latter is fresh. Conjugate shear fissur...
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| Format: | Report |
| Language: | English |
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Department of Geology, Peking University
1981
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| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1222 http://id.nii.ac.jp/1291/00001222/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1222&item_no=1&attribute_id=18&file_no=1 |
| Summary: | Observations with the naked eye and a microscope revealed that there are many fissures in the Jilin meteorite. They may be divided into two kinds; one is filled with dark material and the other is not. The former includes shear fissure and tension fissure. The latter is fresh. Conjugate shear fissures, filled with dark material, are widely spread in the Jilin meteorite. The morphological characteristics are similar to those of the shear joints in the terrestrial rocks. Shear fissures are not generated by the force of impact but by the tectonism. The same type of shear fissure is also seen in other meteorites, such as those in pictures by RAMDOHR (The Opaque Minerals in Stony Meteorites, Berlin, Akademie, 1973). |
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