Tropical Diagenesis of Carbonate Limestone and its Implications for Porosity Development, Case Study: Tendehhantu Formation

The study area is located in Sekerat Village, Bengalon district, Sengata Region, East Borneo Province, Indonesia. Approximately about 300km northern of Samarinda (capital city of East Borneo Province) (Figure 1 A.). This area is less than one degree of northern equator line. The objectives in this study are to know diagenesis stage in this area and relationship to tropical climate especially in porosity development. Indonesia has special case in carbonate diagenesis process. It has tropical climate and archipelago which surrounded by ocean. It means that high rainfall occurs in this country more less half a year. Evapotranspiration to precipitation (hydrology cycle) occurs so fast, so the influx of meteoric and freshwater are very intensive.