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Department of Earth Sciences

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Publication details

Baldini, J.U.L., McDermott, F. & Fairchild, I.J. (2006). Spatial variability in cave drip water hydrochemistry: Implications for stalagmite paleoclimate records. Chemical Geology 235(3-4): 390-404.

Author(s) from Durham

Abstract

The identification of vadose zone hydrological pathways that
most accurately transmit climate signals through karst aquifers to
stalagmites is critical for accurately interpreting climate proxies
contained within individual stalagmites. A three-year cave drip
hydrochemical study across a spectrum of drip types in Crag Cave, SW
Ireland, reveals substantial variability in drip hydrochemical behaviour.
Stalagmites fed by very slow drips (< 0.1 ml/min) may best retain
information regarding decadal- through millennial-scale climate because
the drip sites' diffuse recharge minimizes interferences to the long-term
pattern produced by isolated meteorological events. Additionally,
hydrological routing shifts did not influence these very slow drips.
Intermediate flow regimes (0.1?2 ml/min) are apparently most sensitive to
water excess, and may best preserve a paleoseasonality signal because of a
combination of rapid stalagmite growth, seasonally responsive drip rates,
and minimal interferences from stochastic processes within the aquifer.
Stochastic drip-rate variability existed at several high-discharge (> 2
ml/min) sites, apparently unconnected with local meteorological events.
Water from these drips was typically undersaturated with respect to
calcite, and thus did not result in calcite deposition. Data presented
here suggest that drips in this flow regime also experience flow
re-routing and blocking, and that any stalagmites developed under such
drips are unsuitable as mid- to high-resolution paleoclimate proxies. Most
drip sites demonstrated seasonal [Ca2+] and [Mg2+] variability that was
probably linked to water excess. Prior calcite precipitation along the
flowpath affected the chemistry of slowly dripping sites, while dilution
predominantly controlled the water chemistry of the more rapidly dripping
sites. This research underscores the importance of understanding drip
hydrology prior to selecting stalagmites for paleoclimate analysis and
before interpreting any subsequent proxy data.

References

Atkinson, T.C., 1977. Diffuse flow and conduit flow in limestone terrain
in theMendipHills, Somerset (Great Britain). J.Hydrol. 35, 93�110.
Baker, A., Brunsdon, C., 2003. Non-linearities in drip water hydrology:
an example from Stump Cross Caverns, Yorkshire. J. Hydrol. 277,
151�163.
Baker, A., Barnes,W.L., Smart, P.L., 1997. Variations in the discharge
and organic matter content of stalagmite drip waters in Lower
Cave, Bristol. Hydrol. Process. 11, 1541�1555.
Baldini, J.U.L., 2000. Morphologic and dimensional linkage between
recently deposited speleothems and drip water from Brown's Folly
Mine, Wiltshire, England. J. Caves Karst Stud. 63 (3), 83�90.
Baldini, J.U.L., McDermott, F., Fairchild, I.J., 2002. Structure of the
8200-year cold event revealed by a speleothem trace element
record. Science 296 (5576), 2203�2206.
Baldini, J.U.L.,McDermott, F., Baker, A., Railsback, L.B., Baldini, L.M.,
Mattey, D.P., 2005. Vegetation effects on stalagmite growth rate and
isotopic content. Earth Planet. Sci. Lett. 240 (2), 486�494.
Courbon, P., Chabert, C., Bosted, P., Lindsley, K., 1989. Atlas of the
Great Caves of the World. Cave Books, St. Louis. 369 pp.
Drever, J.I., 1997. The Geochemistry of NaturalWaters. Prentice-Hall,
Inc., Upper Saddle River, NJ. 436 pp.
Fairchild, I.J., Borsato, A., Tooth, A.F., Frisia, S., Hawkesworth, C.J.,
Huang, Y., et al., 2000. Controls on trace element (Sr�Mg)
compositions of carbonate cave waters: implications for speleothem
climatic records. Chem. Geol. 166, 255�269.
Fairchild, I.J., Baker, A., Borsato, A., Frisia, S., Hinton, R.W.,
McDermott, F., et al., 2001. Annual to sub-annual resolution of
multiple trace-element trends in speleothems. J. Geol. Soc. (Lond.)
158, 831�841.
Finch, A.A., Shaw, P.A., Holmgren, K., Lee-Thorp, J., 2003.
Corroborated rainfall records from aragonitic stalagmites. Earth
Planet. Sci. Lett. 215, 265�273.
Gams, I., 1981. Contributions to morphometrics of stalagmites. Proc.
Int. Cong. Speleol. 8, 276�278.
Genty, D., Deflandre, G., 1998. Drip flow variations under a stalactite
of the P貥 No묠cave (Belgium). Evidence of seasonal variations
and air pressure constraints. J. Hydrol. 211, 208�232.
Gunn, J., 1985. Crag Cave. Ir. Speleol. 3 (2), 42�46.
Gunn, J., 1986. Solute processes and karst landforms. In: Trudgill, S.T.
(Ed.), Solute Processes. John Wiley and Sons Ltd.
Huang, Y., Fairchild, I.J., 2001. Partitioning of Sr2+ and Mg2+ into
calcite under karst-analogue experimental conditions. Geochim.
Cosmochim. Acta 65 (1), 47�62.
Huang, Y., Fairchild, I.J., Borsato, A., Frisia, S., Cassidy, N.J.,
McDermott, F., et al., 2001. Seasonal variations in Sr, Mg and P in
modern speleothems (Grotta di Ernesto, Italy). Chem. Geol. 175
(3�4), 429�448.
Jones, G.L., 1995. The Crag cave system and associated karst. Ir.
Speleol. 15, 20�22.
Lakey, B., Krothe, N.C., 1996. Stable isotopic variation of storm
discharge from a perennial karst spring, Indiana. Water Resour.
Res. 32 (3), 721�731.
Lorente, J.M., 1961. Meteorologia, 4th edition. Edition Labor,
Barcelona.
Mayer, J., 1999. Spatial and temporal variation of groundwater
chemistry in Pettyjohns Cave, northwest Georgia, USA. J. Caves
Karst Stud. 61 (3), 131�138.
McCabe, A.M., 1987. Quaternary deposits and glacial stratigraphy in
Ireland. Quat. Sci. Rev. 6, 259�299.
McDermott, F., Frisia, S., Huang, Y., Longinelli, A., Spiro, B., Heaton,
T.H.E., et al., 1999. Holocene climate variability in Europe:
evidence from δ18O, textural and extension-rate variations in three
speleothems. Quat. Sci. Rev. 18, 1021�1038.
McDermott, F., Mattey, D.P., Hawkesworth, C., 2001. Centennialscale
Holocene climate variability revealed by a high-resolution
speleothem δ18O record from SW Ireland. Science 292 (5545),
1328�1331.
McDonald, J., Drysdale, R., Hill, D., 2004. The 2002�2003 El Nino
recorded in Australian cave drip waters: implications for
reconstructing rainfall histories using stalagmites. Geophys. Res.
Lett. 31 (22), 1�4.
Mucci, A., Morse, J.W., 1983. The incorporation of Mg2+ and Sr2+ into
calcite overgrowths: influences of growth rate and solution
composition. Geochim. Cosmochim. Acta 47, 217�233.
Pracht, M., 1996. Geology of Dingle Bay. Geological Survey of
Ireland. 58 pp.
Roberts, M.S., Smart, P.L., Hawkesworth, C.J., Perkins, W.T., Pearce,
N.J.G., 1999. Trace element variations in coeval Holocene
speleothems from GB Cave, southwest England. Holocene 9 (6),
707�713.
Roques, H., 1969. Problemes de transfert de masse pose par
l'evolution des eaux souterraines. Ann. Speleol. 24, 455�494.
Rozanski, K., Araguas-Araguas, L., Gonfiantini, R., 1993. Isotopic
patterns in modern global precipitation. In: Swart, P.K., Lohmann,
K.C., McKenzie, J., Savin, S. (Eds.), Climate Change in Continental
Isotopic Records. American Geophysical Union,Washington,
D.C., pp. 1�36.
Smart, P.L., Friederich, H., 1986. Water movement and storage in the
unsaturated zone of a maturely karstified carbonate aquifer, Mendip
Hills, England. Proceedings of the Environmental Problems in Karst
Terranes and their Solutions Conference, KY, USA, pp. 59�87.
Smart, P.L., Friederich, H., 1987. Water movement and storage in the
unsaturated zone of a maturely karstified carbonate aquifer,
Mendip Hills, England. Proceedings of the Environmental
Problems in Karst Terranes and their Solutions Conference, KY,
USA, pp. 57�87.
Sp? C., Fairchild, I.J., Tooth, A.F., 2005. Cave air control on
dripwater geochemistry, Obir Caves (Austria): implications for
speleothem deposition in dynamically ventilated caves. Geochim.
Cosmochim. Acta 69 (10), 2451�2468.
Stevenson, M., 1998. The Differentiation of Coarse- and Fine-Grained
Sediments by Depositional Mechanism. Crag Cave, Co. Kerry,
Ireland.
Talarovich, S.G., Krothe, N.C., 1998. Three-component storm
hydrograph separation of a karst spring contaminated by
polychlorinated biphenyls in Central Indiana. Environ. Geosci. 5
(4), 162�176.
Thornthwaite Jr., C.W., 1955. The Water Balance. Publications in
Climatology, vol. VIII.Drexel Institute of Technology, Centerton, NJ.
Tooth, A., 2000. Climatic controls on karst water and stalagmite
geochemistry. Unpublished PhD Thesis, Department of Geology,
Keele University.
Tooth, A.F., Fairchild, I.J., 2003. Soil and karst aquifer hydrological
controls on the geochemical evolution of speleothem-forming drip
waters, Crag Cave, southwest Ireland. J. Hydrol. 273 (1�4), 51�68.
Treble, P., Shelley, J.M.G., Chappell, J., 2003. Comparison of high
resolution sub-annual records of trace elements in a modern
(1911�1992) speleothem with instrumental climate data from
southwest Australia. Earth Planet. Sci. Lett. 216 (1�2), 141�153.
Verheyden, S., Keppens, E., Fairchild, I.J., McDermott, F., Weis, D.,
2000. Mg, Sr, and Sr isotope geochemistry of a Belgian Holocene
speleothem: implications for paleoclimate reconstructions. Chem.
Geol. 169, 131�144.
White, W.B., 1988. Geomorphology and Hydrology of Karst Terrains.
Oxford University Press, New York.