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The brine depth of the Khorat Basin in Thailand as indicated by high-resolution Br profile
Shen, L.; Siritongkham, N.; Wang, L.; Liu, C.; Nontaso, A.; Khadsri, W.; Hu, Y. (2021). The brine depth of the Khorat Basin in Thailand as indicated by high-resolution Br profile. NPG Scientific Reports 11(1): 8673. https://hdl.handle.net/10.1038/s41598-021-88037-6
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Shen, L.
- Siritongkham, N.
- Wang, L.
- Liu, C.
|
- Nontaso, A.
- Khadsri, W.
- Hu, Y.
|
|
| Abstract |
Bromine contents of a 17-cm halite core from drilling hole of K203 in the Khorat Basin were analysed at 1 cm intervals (17 samples in total). The Br contents range from 99 to 184 ppm with a rapid variation. The K/Mg ratios of halite samples are tens of times higher than those of primary halite fluid inclusions. There is no positive correlation between Mg and Br contents, suggesting that fluid inclusions impose very little or negligible influence on Br contents of halites. The Br contents are not controlled by potash minerals either because the SEM examination shows no potash minerals and there is no relationship between K and Br contents. The Br contents of halite are thus primarily controlled by the Br concentrations of parent brines. The rapid variation of Br contents of halite within this section suggests a shallow saline pan wherein the giant Khorat evaporites were formed. This is contradictory to previous Br profiles of the Lower Salt Member which showed relatively stable and continuously increasing trends. The shallow saline pan model evidenced by high-resolution Br profile is consistent with sedimentary facies and salt mineral textures. |
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