Anomalous drip in the Punkva caves (Moravian Karst): relevant implications for paleoclimatic proxies

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Abstract

The anomalous drip in the Punkva caves (Moravian Karst) shows specific hydrogeochemical properties such as low SIcalcite ˜ 0.14 ± 0.11 (standard deviation), low mineralization (4.53 ± 0.42) × 10−3 mol l−1, and enhanced values of δ13C (−7.85 to −8.35‰ VPDB), Mg/Ca × 1000 ratio (45.7 ± 3.3), and Sr/Ca × 1000 ratio (0.65 ± 0.06). By these properties, the anomalous drip significantly differs from other regular drips in the same cave and other caves in the region. The study suggests that the anomalous drip properties are a consequence of prior calcite precipitation or/and water mixing along the water flow path. As the former processes are spatially controlled, the knowledge of dripwater flow path seems to be necessary for correct paleoclimatic/paleoenvironmental reconstructions. Copyright © 2015 John Wiley & Sons, Ltd.

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