RESULTS OF UNDERGROUND‐SEISMIC REFLECTION INVESTIGATIONS IN THE SIDERITE DISTRICT OF THE SIEGERLAND*

Abstract

A bstract The iron ores of the Siegerland district are found in lodes occurring in schists of Lower Devonian age. These lodes, normally dipping almost perpendicularly, could be traced only by seismic reflection measurements underground, up to distances of approximately 500 m. The geophones were attached to the walls of the galleries. The frequencies of the recorded longitudinal and transverse waves ranged from 200 to 500 c.p.s. By this method a new siderite lode was discovered.