K/AR DATING OF BUKIT ASAM AND BUKIT KENDI INTRUSSIONS RELATED TO AGE OF MATURITY AND INCREASING OF COAL QUALITY IN TANJUNG ENIM AREA, SOUTH-SUMATERA

PROCEEDINGS JOINT CONVENTION BALI 2007
The 32^nd HAGI, The 36^th IAGI, and The 29^th IATMI Annual Conference and Exhibition

K/AR DATING OF BUKIT ASAM AND BUKIT KENDI INTRUSSIONS RELATED TO AGE OF MATURITY AND INCREASING OF COAL QUALITY IN TANJUNG ENIM AREA, SOUTH-SUMATERA

Harry Utoyo¹

¹Geological Survey Centre,
Jl. Diponegoro 57 Bandung, Indonesia, Ph (022) 7203205
E mail: harryutoyo@grdc.esdm.go.id

ABSTRACT

Coal bearing Muara Enim Formation is widely spread in Muara Enim, especially in Tanjung Enim District, South-Sumatera Province. Field observations display increasing maturity and quality towards Bukit Asam and Bukit Kendi intrusions. Potassium argons age analysis revealed that Bukit Asam is 0,9203 ± 0,26 million years in age and Bukit Kendi is 1,1472 ± 0,29 million years. in age respectively, while Bukit Serilo displays negative age. These K/Ar ages result revealed that increasing maturity and quality of coal of the Bukit Asam and Bukit Kendi have taken place since 1,14 million years.

Keywords: K/Ar dating, coal, age of maturity, quality