40Ar/39Ar geochronology of the Pongkor low sulfidation epithermal gold mineralisation, West Java, Indonesia

Abstract

The Pongkor gold deposit located approximately 90 km southwest of Jakarta is well known as the typical low sulfidation (LS) epithermal gold deposit and the largest gold vein deposit in Indonesia. The Pongkor gold mineralisation has been the subject of several geological studies. Determination of the duration of gold mineralisation events, however, is less well understood. The mineralisation events are important for understanding the genesis of ore deposits. This study presents 40Ar/39Ar age results for four adularia samples from Ciguha gold-bearing quartz vein yielding plateau ages of 1.80 ± 0.03 Ma, 2.33 ± 0.32 Ma, and 1.88 ± 0.02 Ma, plus one weighted mean age of 1.95 ± 0.04 Ma. Adularia f..