Hydrothermal alteration of magnetic fabrics of rocks in the Xiaoban gold-bearing shear belt, Fujian Province, China
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876488321916469248 |
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| author | Shunshan Xu |
| author_facet | Shunshan Xu |
| contents | Hydrothermal alteration of magnetic fabrics of rocks in the Xiaoban gold-bearing shear belt, Fujian Province, China Shunshan Xu Ganguo Wu Jianshe Wu Bailin Chen Ciencias de la Tierra China anisotropy susceptibility Magnetic fabric hydrothermal alteration Magnetic fabrics indicate that the Xiaoban shear zone underwent low-grade hydrothermal alteration in the Mesozoic (~180Ma). Samples studied come from altered and unaltered units from three mine levels. (1) Susceptibility is mainly due toparamagnetic minerals such as biotite and pyrite. The reduction of mean susceptibility is due to decrease in Fe content and changeof magnetic mineral size, as well as increase of diamagnetic minerals. (2) Anisotropy (P) decreases after hydrothermal alteration.Its tendency to change is the same as that of the mean susceptibility. (3) The AMS ellipsoid does not substantially change its shapeafter hydrothermal alteration. An oblate sphere is maintained. The minimum principal susceptibility axis (K3) falls close to theplane which is perpendicular to the schistosity for all samples. However, the maximum principal susceptibility axis is subject tolarge changes. The results indicate that new magnetic minerals are distributed on the existing schistosity plane, without a preferredorientation. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842107 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842107 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Hydrothermal alteration of magnetic fabrics of rocks in the Xiaoban gold-bearing shear belt, Fujian Province, China Shunshan Xu Ciencias de la Tierra China anisotropy susceptibility Magnetic fabric hydrothermal alteration Hydrothermal alteration of magnetic fabrics of rocks in the Xiaoban gold-bearing shear belt, Fujian Province, China Shunshan Xu Ganguo Wu Jianshe Wu Bailin Chen Ciencias de la Tierra China anisotropy susceptibility Magnetic fabric hydrothermal alteration Magnetic fabrics indicate that the Xiaoban shear zone underwent low-grade hydrothermal alteration in the Mesozoic (~180Ma). Samples studied come from altered and unaltered units from three mine levels. (1) Susceptibility is mainly due toparamagnetic minerals such as biotite and pyrite. The reduction of mean susceptibility is due to decrease in Fe content and changeof magnetic mineral size, as well as increase of diamagnetic minerals. (2) Anisotropy (P) decreases after hydrothermal alteration.Its tendency to change is the same as that of the mean susceptibility. (3) The AMS ellipsoid does not substantially change its shapeafter hydrothermal alteration. An oblate sphere is maintained. The minimum principal susceptibility axis (K3) falls close to theplane which is perpendicular to the schistosity for all samples. However, the maximum principal susceptibility axis is subject tolarge changes. The results indicate that new magnetic minerals are distributed on the existing schistosity plane, without a preferredorientation. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842107 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| title | Hydrothermal alteration of magnetic fabrics of rocks in the Xiaoban gold-bearing shear belt, Fujian Province, China |
| topic | Ciencias de la Tierra China anisotropy susceptibility Magnetic fabric hydrothermal alteration |
| url | https://www.redalyc.org/articulo.oa?id=56842107 |