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本文概述了为青藏科考大地电磁测深工作研制的三分量磁饱和式磁力仪的原理、性能、用途和野外使用情况。 仪器的技术指标为:分辨率0.2伽(亻马);灵敏度100毫伏/伽(亻马);温度系数l伽(亻马)/℃;记录频带0—1.0赫兹;耗电量18瓦。 在青藏高原的地球物理考察中,用本仪器先后在藏南、藏北五个点进行了连续数月的野外地磁测量。从工作情况看,仪器工作正常,记录了一次完整的磁暴,为研究青藏高原地壳与上地幔的电性结构提供了一批有意义的资料。
This paper summarizes the principle, performance, use and field use of the three-component magnetostrictive magnetometer developed for the geomagnetic sounding of the Qinghai-Tibetan area. The technical specifications of the instrument are as follows: Resolution 0.2 Gamma (亻 MA); Sensitivity 100 mV / Gamma (亻 MA); Temperature coefficient l Gamma 亻 MA / ℃; Recording band 0-1.0 Hz; Power consumption 18 watts. In the geophysical investigation of the Qinghai-Tibet Plateau, the instrument has been used for field geomagnetic surveys in successive five months in southern Tibet and northern Tibet. From the working conditions, the instrument is working normally and a complete magnetic storm is recorded, which provides a lot of meaningful information for studying the electrical structure of crust and upper mantle in the Qinghai-Tibet Plateau.