MAGNETIC PROSPECTING AT THE TJIKOTOK GOLD MINE, WEST JAVA

Abstract

From November to December 1967 at Tjiparaj in the area of the Tjikotok gold mine, the magnetic survey was carried out with a Ruska vertical field balance, the scale value of which was adjusted 3.54 v/s.d- The number of observation polnts amounts to 309 with a spacing of 10 m. To eliminate the diurnal variation of the earttr,'s magnetic field and the change of the instrumental condirion, a loop measu'rement for repeating at the base point was completed within nearly one hour. From the magnetic anomalies obtained, has been found a peculiar feature, which is considered to charact erizn the anomalies of vertical intensity in the equatorial region. As to the gold bearing quartz vein, the southern part in the surveyed area may be considered more promising than the norlhern part.