- from 137 to 603m consists of thick siltstone layer with interbedded sandstone and minor claystone,
- from 603 to 723m consists of thick sandstone layer interbedded with siltstone and local claystone, and
- from 723 to 2232m dominated by claystone and siltstone interbedded with minor sandstone and rare limestone.
The portable XRF data were evaluated and a Si-Ca-Al discrimination triangle was developed. This triangle not only discriminates between various major interval lithologies, but also the thin interbeds along with subtle geochemical changes in beds and transition from one lithology to another can be monitored easily. Read the entire Application of XRF in Mud Logging case study.