التفاصيل البيبلوغرافية
| العنوان: |
HYDROCHEMICAL ASSESSMENT OF UNCONFINED AQUIFER SYSTEM IN BAYAT MELANGE COMPLEX, KLATEN, INDONESIA. |
| المؤلفون: |
Putranto, T. T., Hidajat, W. K., Wijaya, H. |
| المصدر: |
International Journal of GEOMATE; Nov2017, Vol. 13 Issue 39, p17-24, 8p |
| مصطلحات موضوعية: |
AQUIFERS, WATER table, STRUCTURAL geology |
| مستخلص: |
The geological setting of Bayat that has a complexity in structural geology as well as a variety of lithology because this region is interesting to be investigated from the hydrogeological point of view. Hydrogeological assessments were conducted based on the hydrogeological and geological mapping, as well as hydrochemical analysis. Groundwater level measurements were carried out at 51 measurement points. There were 25 groundwater samples to be analyzed the ion content by using Ion Chromatography and ICP-OES. There are seven (7) lithology units i.e. Schist-phyllite-marble, Nummulities limestone, Diorite intrusion, Pebbly sandstone, Layered limestone, Colluvial and Alluvial deposit based on the surface geological mapping. The geological structure investigation in Temas Hill conduct the trends of structural orientation that are northeast to southwest. They become the point of infiltration and circulation pathways in the crystalline bedrock. Hydrochemical analysis obtain five (5) groundwater facies. They are Ca-Mg-HCO3, a mix of Ca-Na- HCO3-Cl, Na-HCO3, Ca-SO4 and Na-Cl. The concentration abundances of cation are Na+>Ca2+>Mg2+>K+ while HCO3->Cl->SO42->NO3- represent anion content. A Gibbs diagram shows that the dissolved ions are dominated by rock weathering process. Na+ ion is derived from the weathering of feldspar-rich mineral, Ca2+ and Mg2+ indicate through limestone dissolving. The high Cl- ion content in some samples is predicted from the mixing of upwelling fossil water through Trembono strike-slip fault. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
