Short Course ：Isotope Geochemistry

Outline

Lecture 1:

1. Review of light stable isotopes

2. O and H isotopes: origin of hydrothermal water? Multiple fluids?

3. S isotopes: Origin of sulfur? Multiple sources?

          Isotope Geochemistry Lecture 1.pdf

Lecture 2:

1.Physics of porphyry copper deposit formation

Fluid inclusion evidence

Behavior of Cl

2. Review of stable Cl isotope studies

3. Suggestions for future work

          Isotope Geochemistry lecture 2.pdf

Lecture 3:

1.Seawater

2.Geochemical cycle of chlorine

3.Evolution of ocean water

4.Evaporites through time

5.Basin brines

6.A Mississippi Valley type deposit

          Isotope Geochemistry lecture 3.pdf

Lecture 4:

1.Laboratory intercomparisons

2.Examples of extreme δ37Cl in continental settings

Chatham group sediments, North Carolina, USA

Salt occurrences, Atacama Desert, Chile

China Lake, California, USA

Chinese basins Jurassic and recent

Safford Basin, Arizona, USA

3. Fractionation and separation mechanisms

          Isotope Geochemistry lecture 4.pdf

Lecture 5:

1. Introduction to O and H isotopes in groundwater

2. Stable isotopes and dams – a dating tool

3. Stable Isotopes reveal the influence of paleogeography on groundwater flow

          Isotope Geochemistry lecture 5.pdf

Lecture 6:

1. This proved disappointing – groundwater isn’t like that!

Even for other researchers’ isoscapes?

2. Too much variation due to evaporation; no consistent geographic distribution; in some cases, relationship to depth

3. Look at general patterns in the entire dataset for each basin

4. Interpret emerging patterns in terms of recharge mechanism

5. Explain different mechanisms in terms of process

          Isotope Geochemistry lecture 6.pdf

Lecture 7:

1. Review of stable O, H isotopes

2. Tucson data set

3. Amount effects in precipitation stable isotopes

4. Amount effects in Tucson precipitation, and applications

5. Amount effects at other sites

6. Conclusions

          Isotope Geochemistry lecture 7.pdf