- #1
geojon
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Homework Statement
Two water samples are mixed. Sample 1 has δ18O-H2O = -1(per mil), Sample 2 has δ18O-H2O = -20 (per mil), and the mixture has δ18O-H2O = -15 (per mil).
What fraction of water came from sample 1 and what fraction came from sample 2?
Assume that F = the fraction of the water that came from Sample 1
Assume that 1-F = the fraction of the water that came from Sample 2
Homework Equations
QT=Q1+Q2 where QT is total percent, and Q1 and Q2 are the percent contributions to the mixture from samples 1 and 2, respectively.
δ18OTQT = δ18O1Q1+δ18O2Q2
The Attempt at a Solution
I've uploaded my work...if I am using the write mixing equation for two endmembers, my problem really is then just isolating and solving for F. From there I can solve for F2