GEOLOGICAL AND GEOPHYSICAL INVESTIGATIONS OF THE KLIRIPAN MANGANESE FIELD, CENTRAL JAVA

Abstract

Itttining activities in the Ifliripan manganese field are historically compiled since the first excavation in 1912. The geology of the Krengseng manganese mine in the Kliripan field is described, together with the manganese ores. A magnetic survey for measuring the anomaly of the vertical intensity was carried out in the Krengseng mine. The anomalies observed are as a whole small, but towards the west the effect of the andesitic rocks are conspicuous. While, the whole distribution of the anomalies seems to be explained by the assumption that the geological bodies are magnetized by the earth's field in a low geomagnetic latitude of the Southern hernisphere. The widely part of the zorte of positive anomalies seems to coincide with the area ascertained by bore-holes to reserve a manganese layer. However, it is questionable whether the coincidenee shows a logical relation between the anomalies and the manganese layer.