Magnetic properties of the Wenchuan Earthquake Fault Scientific Drilling Project Hole-1 (WFSD-1), Sichuan Province, China
Magnetic properties of the Wenchuan Earthquake Fault Scientific Drilling Project Hole-1 (WFSD-1), Sichuan Province, China
复制标题
中国四川省汶川地震断层科学钻探项目Hole-1 (WFSD-1)的磁特性
DOI：
10.1186/1880-5981-66-23
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发表时间：
2014-04
影响因子：
3
通讯作者：
Zhou, Zaizheng
中科院分区：
文献类型：
--
作者：
Wang, Huan;Si, Jialiang;Sun, Zhiming;Zhou, Zaizheng
在汶川地震（5.12,Mw7.9）断层科学钻探工程（WFSD-1）第一个钻孔中，以1 cm的间隔测量了岩心的磁化率。WFSD-1岩心的几个断裂带显示了磁化率异常与断层岩产状的相关性。样品在589.25 m深度处的质量和铁磁材料磁化率值均高于其他样品。热磁曲线在380℃后斜率迅速增大，升温曲线在510℃左右出现明显的峰值。冷却曲线明显高于加热曲线。饱和磁化强度（Ms）在589.25 m深度处有一个显著的峰值，质量磁化率和铁氧体磁化率也有显著的峰值。589.25 m高磁化率的主要机制可能是含铁硅酸盐（如绿泥石）或粘土在地震滑动过程中摩擦加热产生新的磁铁矿。因此，我们认为在同一乡村岩石中存在高磁化率断层沟可以被认为是地震或地震特征的指示。
We measured the magnetic susceptibility of the core from the first borehole of the Wenchuan Earthquake (May 12, 2008,Mw7.9) Fault Scientific Drilling Project (WFSD-1) at 1-cm intervals. The correlations between magnetic susceptibility anomalies and fault rock occurrence are shown by a few fault zones in the WFSD-1 core. The values for the mass and ferromagnetic material magnetic susceptibility for the sample at 589.25-m depth are higher than those for the other samples. All the thermomagnetic curves display a rapid increase in slope after 380°C, and a marked peak occurs at about 510°C in the heating curves. The cooling curves are clearly higher than the heating curves. The saturation magnetization (Ms) shows a significant peak at a depth of 589.25 m, as do the mass magnetic susceptibility and the ferrimagnetic magnetic susceptibility. The mechanism principally responsible for the high magnetic susceptibility at a depth of 589.25 m might be the production of new magnetite from iron-bearing silicates (e.g., chlorite) or clays caused by frictional heating during seismic slip. Therefore, we suggest that the presence of high magnetic susceptibility fault gouges in the same country rock can be considered as an indicator of earthquakes or seismic signatures.
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影响因子：
3.5
作者：
E. Ferré;S. M. Maes;K. Butak
通讯作者：
E. Ferré;S. M. Maes;K. Butak
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
Eth Zentrum
通讯作者：
Eth Zentrum
影响因子：
5.2
作者：
Y. Enomoto;Zhong Zheng
通讯作者：
Y. Enomoto;Zhong Zheng
影响因子：
--
作者：
W. Bosum;U. Casten;F. C. Fieberg;I. Heyde;H. Soffel
通讯作者：
W. Bosum;U. Casten;F. C. Fieberg;I. Heyde;H. Soffel
影响因子：
1.5
作者：
N. Nakamura;H. Nagahama
通讯作者：
N. Nakamura;H. Nagahama