Computer Science
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.2169l&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 8, pp.2169-2175
Computer Science
12
Scientific paper
The cumulative infiltration of fluid into a permeable and porous solid along a 1-dimensional trajectory leads to systematic alteration of the "aquifer" solid. Model simulations of infiltration into rock of initially uniform oxygen isotope composition provide characteristic profiles of 18 O (solid) vs. infiltration distance. Analytic solutions are presented of the governing differential equations. For given initial and input conditions (relative isotope ratios of input water and initial rock compared to equilibrium fractionation) and porosity, the simulated 18 O profiles depend upon a single dimensionless quantity N D (Damköhler number), which expresses the variables fluid flux, isotope exchange rate and infiltration distance. The systematics of 18 O (solid) vs. distance profiles can be readily adapted to fluid pathways with any given temperature profile and porosity.
Blattner Peter
Lassey Keith R.
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