Sungei Isahan - A new primary tin occurrence in Sumatra

702001-101088-885-B
Author : Michael O. Schwartz and Surjono
Publication : Bulletin of the Geological Society of Malaysia
Page : 181-188
Volume Number : 26
DOI : https://doi.org/10.7186/bgsm26199013

Bulletin of the Geological Society of Malaysia, Volume 26, April 1990, pp. 181 – 188

 

Sungei Isahan – a new primary tin occurrence in Sumatra

MICHAEL O. SCHWARTZ1 AND SURJONO2

1Bundesanstalt fϋr Geowissenschaften und Rohstoffe, P.O. Box 510153, D-3000 Hannover 51, Fed. Rep. of Germany

2 Directorate of Mineral Resources, Bandung, Indonesia

 

Abstract: The newly discovered primary tin occurrence at Sungei Isahan, Sumatra, Indonesia, has cassiterite mineralization emplaced on the slope of Bukit Pintu Tuju in fine-grained muscovite granite characterized by strong hydrothermal alteration.

The granite grades into greisen zones which often border quartz veins and lenses that carry tourmaline, muscovite and coarse cassiterite.

A similar radiometric age and geotectonic position allow the Sungei Isahan mineral occurrence to be correlated with the Main Range of Peninsular Malaysia. 

https://doi.org/10.7186/bgsm26199013