多参量高精度磁测的应用前景

“七五”期间,我国磁法测量工作将采用高精度微机质子磁力仪更新换代,取代机械磁力仪。但采用这种磁力仪后勘探效果到底能有那些改善呢？作者从磁测精度对磁测效果的影响、扩大应用范围、以及多参量测量的可能性和优越性等方面作了详尽分析。文中还列举了几种简单形体的垂向梯度(TH)、垂向二次梯度(THH)、水平梯度(TX)、垂向梯度的水平梯度(THX)参量图以及这几种参量的花样图,表明多参量测量在磁异常的定性、定量解释中具有简单、准确可靠的特点,对复杂磁异常的解释也有着一定的潜力。最后以三个矿区的实际资料表明了高精度微机质子磁力仪的精度与地质效果。

PROSPECTS FOR APPLICATION OF MULTIPARAMETER HIGH-PRECISION MAGNETIC SURVEY

High-precision micro-computer proton magnetometer is going to be adopted in magnetic survey work of China during the seventh five-year-plan period to replace the outmoded mechanical magnetometer.Nevertheless,what improvements in exploration results can be achieved by employing this kind of magnetometer? To probe into this problem,the author has made a detailed analysis in such aspects as the influence of precision of magnetic measurement on the result of magnetic measurement, the expansion of application sphere as well as the possibility and advantage of applying the multiparameter measurement.This paper also enumerates parameter diagrams of vertical gradient (TH), vertical quadratic gradient (THH), horizontal gradient (TX) and horizontal gradient of vertical gradient (THX) for several simple-shaped objects as well as-the patterns of these parameters, implying that the multi-parameter and measurement has the merits of simplicity, accuracy and reliability in qualitative quantitative interpretation of magnetic anomalies, and also shows some potentiality in the interpretation of complex anomalies.Some data obtained from three ore districts are taken as examples to illustrate the precision and geological effects of the high-precision micro-computer proton magnetometer.