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- Title
Drip water Geochemistry of Niah Great Cave, NW Borneo, Malaysia: a base line study.
- Authors
Prasanna, M.; Nagarajan, R.; Chidambaram, S.; Manikandan, S.; Elayaraja, A.
- Abstract
A base line study was conducted to understand the geochemical variations of drip waters in Niah Great Cave, Sarawak, NW Borneo of Malaysia. Drip waters were collected at three different sites within the cave (D6: SW entrance enroute to painted Cave; D5: centre of the Great Cave, and D8: west mouth Great Cave entrance). The collected samples were analysed for temperature, pH, EC, major elements, non purgeable organic carbon, δC and δO. Mg/Ca and Sr/Ca ratios, ionic strength, partial pressure of CO and saturation indices of carbonate minerals have been used to dictate the geochemical signatures of drip water compositions. The data reveal a wide range of major ion chemistry at three different sites within the cave. The δC values in drip waters range from −10.58 to −10.09 ‰. The enriched and the depleted δC values are noted at the entrances of the cave due to degassing of water CO and warmer air results in lighter fractions of δC. The δO values range from −6.89 to -6.16 ‰. Minor δO deviation in the drip waters are due to the variation in drip rates as faster drip rates show depleted isotopic composition and vice versa. The spatial variability of drip water chemistry results due to water-rock interaction at various conditions of subsurface flow path. This study gives a basis for interpreting the varying controls on drip water chemistry in the cave.
- Subjects
CARBONATE minerals; CAVES; ISOTOPES; WATER chemistry; COMPOSITION of water; WATER-rock interaction
- Publication
Carbonates & Evaporites, 2014, Vol 29, Issue 1, p41
- ISSN
0891-2556
- Publication type
Article
- DOI
10.1007/s13146-013-0164-3