地面高精度磁测仪器的应用探讨

Discussion on the Application of High-precision Ground Magnetic MeasurementInstrument

MP—4高精度磁测仪器,在80年代中期,由地矿部首先引进,并投入试生产。北京地质仪器厂引进了成套生产线。80年代末期,有色、冶金等系统也相续配置了MP—4仪器。 MP—4质子式磁力仪、读数分辩为0.1纳特,主要观测参量为T、TH、TX。

Abstract: MP-4 type high-precision magnetic measurement instrument is Introduced in mid-80's. However, many difficulties have been met in. the production and investigation due to imperfect understanding for T theory and lack of suitable explanation softwares. During recent investigation and operation, relative explanation softwares have been developed to constitute a set of effective explanation theory.In the data collection stage, some 昿roblems most be solved including examination of instrument performance, observation of total magnetic field for the day mil night, distribution and measurement of base points, basic magnetic field, the changes of diurnal variation, normal field and elevation correction. In the data pretreatment stage, useful information is strengthened to explain the anomalies of mineralization bodies by eliminating distortionai points and random disturbances as well as network-forming treatment of data. Though high-precision magnetic measurement is only used to explain quantiatively and seniiqnantltarlve anomalies and to abstract weak anomalies from a complex field,the anomaly of oblique magnetization can be interpreted completely by a ternary interpretation system. The high-precision magnetic measurement instrument can widely be used for the prospecting of metal ore deposit, oil and gas , and In the fields of hydrogeological and engineering geology, environmental geology, disaster geology and archaeological geology.