摘要
采用BHTE-06型热电测量仪,选择磁铁矿、毒砂、黄铁矿、黄铜矿4种代表性天然半导体矿物进行了不同活化温度下热电势的测量。测试结果显示:几种矿物均有"热电势绝对值随活化温度增加而增加"的规律。根据半导体矿物热电特性的基本理论和天然矿物形成条件的分析,笔者认为:地壳内广泛存在天然半导体矿物,绝大多数半导体矿物具有热电特性。由于"孕震发震过程中存在同源电磁场和热场相互作用",所以伴随孕震发震过程的热场变化可能激发半导体矿物产生热电效应,进而产生新的附加热电势场。这种附加热电势场可能是映震前兆信息源。这说明,广泛存在的天然半导体矿物极有可能是孕震发震过程大地电场异常变化的重要影响因素之一。因此,深入探讨天然半导体矿物的热电效应,对全面理解震前电场前兆异常变化的机理具有启示意义。
Under different active temperature, the thermo-voltage of four kinds of typical minerals, such as magnetite, arsenopyrite, pyrite, and chalcopyrite, were tested by thermoelectricity equipment BHTE-06. All the minerals showed that the absolute value of the thermo-voltage rose with active temperature increasing. Based on the theory of thermoelectricity and the analysis of genetic environment of natural minerals, we assume that the semiconductor minerals widely exist in crust and most of them have the thermoelectric property. Because the isogenetic electronmagnetic field and thermal field can interact with each other while the earthquake is generated and occurred, we propose that the thermal field can excite the semiconductor minerals to produce thermoelectric effects and a new additional thermoelectric field. The additional thermoelectric field may provide precursory information for earthquake prediction. The thermoelectricity produced by widely existing natural semiconductor minerals in crust may play an important role in the abnormal change of geoelectric field during the gestation and occurrence of an earthquake. Therefore, the in-depth study of thermoelectric effects of natural semiconductor minerals is of revelatory significance for understanding the general mechanism of abnormal change of geoelectric field before an earthquake.
出处
《地学前缘》
EI
CAS
CSCD
北大核心
2009年第4期313-319,共7页
Earth Science Frontiers
基金
国家科技支撑计划项目(2008BAC35B05)
关键词
天然半导体矿物
热电性
地震
电场异常
natural semiconductor minerals
thermoelectricity
earthquake
abnormal electric field
