Ideally, exploration for these deposits should begin with regional studies and other GIS techniques. In Southeast Asia, these types of laterite deposits are relatively easy to find. They can occur anywhere, where Ophiolite formations have been uplifted and weathered over time.

The occurrence of metallurgical and high grade coal deposits in Indonesia is controlled by the distribution of bituminous coal deposits (Nas, 2005). For these reasons, high CV rank coal deposits in Kalimantan belong to 2 groups of rocks as follows…

Large, well-developed nickel laterite deposits are common in Sulawesi because ophiolite rocks have been exposed to wet tropical climates for millions of years.