Lignite and tin ores exploration in southern part of Thailand by using nuclear track-etch detectors
✍ Scribed by T. Chittrakarn; R. Boonnummar; T. Pongsuwan; P. Nuannin; S. Arrykul; P. Poemthong; C. Kaew-on
- Publisher
- Elsevier Science
- Year
- 1993
- Weight
- 259 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0969-8078
No coin nor oath required. For personal study only.
✦ Synopsis
Both lignite and tin mines in Southern of Thailand are associated with uranium ore. In lignite exploration, Bangpudum Lignite Mine at Krsbl Province was chosen for this studied because we know the exact location and deposition of coal seam by using other geophysical technique and also confirm by Ix)rshola.
The size lx2 cm 2 of cellulose nibato CN-85 films were used, each film was stuck st the inner bottom of a soflddnk cup. Each cup was put up side down at the bottom of a borshola about 75 cm depth from the earth surface and laid about 10 m apart. All the cups were put in the hole along the line in order to cover about 280 metre in the cross sectional direction long of the known coal seam. After one month, ell the film detectors were collected and etched with 6.25N NaOH st 60oC about 25 minutes long in order to enlarge the latent alpha reglalntion tracks. These alpha particles were emitted from radon gee (Rn-222) which was generated from uranium assoclat~ with lignite ors. The registration track density par area of each CN-86 film was studied by optical microscope st 400x magnifications.
We found that the track densities of the films have high correlation with the depth of the known coal seam while high and low track densities will correspond to the shallow and deep coal seam respectively. Also, track density was significantly higher than background.
A similar manner of experiment was designed for tin ore exploration at Ronpibul district, Nakom Si Thammaret province. The result is in progress and will present st the conference.