以成矿年代学为基础的磁法勘查新技术的初步试验研究

成矿年代学认为,某地区特定类型的矿床形成于特定的地质时期。根据古地磁学与地磁年代学,特定地质时期的地磁场方向一定。通过比较矿化岩石与围岩的剩余磁化方向,可确定矿化异常。本文讨论了磁法勘查新技术的成矿年代学基础,提出以"地质时间"为核心概念的表达矿异常的参数,并通过一个实例简要说明该新技术在找矿勘探上的潜力。

THE PRELIMINARY TEST AND STUDY OF A NEW MAGNETIC EXPLORATION TECHNIQUE ON THE BASIS OF METALLOGENIC CHRONOLOGY

Based on the theory of paleomagnetism and geomagnetochronology that the Earth magnetic field has definite direction in a specific geological period, we can recognize anomalies related to mineralization through a comparision of residual magnetization directions between mineralized rocks and wall rocks. This paper has discussed the metallogenic chronological basis of a new magnetic exploration technique, put forward the parameters for expressing anomalies related to mineralization with "geological time" as the key concept, and with a practical example, briefly illustrated the potentiality of the new technique in ore-prospecting and exploration.