The δ2
H and δ18O values of groundwater
discharging from springs in the Furnace Creek
and Ash Meadows discharge areas of the DVFS
vary little over time and are similar (Table 1),
indicating that both spring discharge areas likely
receive most of their water from the same
recharge areas. Additionally, numerous springs
in both discharge areas have nearly constant
spring flow, water temperature, and major ion
chemistries over time, indicating the presence of
a stable and deep groundwater flow system.
Most of the major ion concentrations are similar
among the different springs (Table 1), indicating
that the water chemistry is derived from the
same geochemical reactions along geologically
similar flow paths in the aquifer. However, there
are water chemistry, δ87Sr, and microbial
community differences among springs in Ash
Meadows and between the Ash Meadows springs and Death Valley springs and especially a well (BLM-1) located
between these two spring discharge areas (Fig. 1). These differences indicate that flow paths are not the same for all
springs in a common spring discharge area and between spring discharge areas. In the Ash Meadows spring complex,
significant variations in Na+
, SO4
2-, and dissolved methane concentrations are observed in Big Spring (Fig. 1; Table 1)
[3,5,8,10]. These differences likely result from slightly different flow paths that encounter non-carbonate and/or carbonate
The δ2H and δ18O values of groundwaterdischarging from springs in the Furnace Creekand Ash Meadows discharge areas of the DVFSvary little over time and are similar (Table 1),indicating that both spring discharge areas likelyreceive most of their water from the samerecharge areas. Additionally, numerous springsin both discharge areas have nearly constantspring flow, water temperature, and major ionchemistries over time, indicating the presence ofa stable and deep groundwater flow system.Most of the major ion concentrations are similaramong the different springs (Table 1), indicatingthat the water chemistry is derived from thesame geochemical reactions along geologicallysimilar flow paths in the aquifer. However, thereare water chemistry, δ87Sr, and microbialcommunity differences among springs in AshMeadows and between the Ash Meadows springs and Death Valley springs and especially a well (BLM-1) locatedbetween these two spring discharge areas (Fig. 1). These differences indicate that flow paths are not the same for allsprings in a common spring discharge area and between spring discharge areas. In the Ash Meadows spring complex,significant variations in Na+, SO42-, and dissolved methane concentrations are observed in Big Spring (Fig. 1; Table 1)[3,5,8,10]. These differences likely result from slightly different flow paths that encounter non-carbonate and/or carbonate
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