用电磁感应法研究潘诺尼亚盆地的地壳和上地幔

CRUSTAL AND UPPER MANTLE RESEARCH IN PANNONIAN BASIN BY ELECTROMAGNETIC INDUCTION ：A REVIEW

总结了近３０年来用电磁感应法研究潘诺尼亚盆地和喀尔巴阡山的主要结果。对下述导电层作了详细的讨论：（１）与测区内断裂构造有关的由石墨片岩引起的沉积盆地结晶基底中的壳内导电体；（２）在３００～４００℃温度下与岩石脱水过程中形成的自由液体有关的良导层；（３）岩石圈底部部分熔融而造成的高导性软流圈；（４）橄榄石－尖晶石相变使导电性增加。所有这些现象都与潘诺尼亚盆地和喀尔巴阡地区特定的热状态和大地构造有密切的联系。

The review paper summarizes the mian resluts of the electromagnetic induction stdies car-ried out in the Pannonian Basin and Carpathians during the last 30 years．The following conduct-ing formations are discussed in detail：（1） Crustal conductors in the crystalline basement of thesedimentary basin mainly due to graphitic schist blocks clearly connected to the fracture tectonicsof the area；（2） Conducting layer in the lower crust probably due to free fluid delivered by thedehydration process at temperature of 300～400℃ during metamorphism；（3）Conducting as-thenosphere due to partial melting at the bottom of the lithophere； and（4） Conductivity increas-es due to olivine-spinel phase transition．All of these phenomena are strongly related to the specialthermal state and tectonics of the Pannonian Basin and Carpathians．