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| Content Provider | Springer Nature Link |
|---|---|
| Author | Lowenstein, Tim K. Risacher, François |
| Copyright Year | 2008 |
| Abstract | Diagenetic-hydrothermal brines, here called “hydrothermal Ca–Cl brines,” have compositions that reflect interactions between groundwaters and rocks or sediments at elevated temperatures. Hydrothermal Ca–Cl brines reach the surface by convection-driven or topographically driven circulation, and discharge as springs or seeps along fault zones to become important inflow waters in many tectonically active closed basins. Case studies from (1) Qaidam Basin, China, (2) Death Valley, California, (3) Salar de Atacama, Chile, and (4) Bristol Dry Lake, California illustrate that hydrothermal Ca–Cl inflow waters have influenced brine evolution in terms of major ion chemistries and mineral precipitation sequences. All four basins are tectonically active; three (Death Valley, Salar de Atacama, and Qaidam Basin) have well-documented Ca–Cl spring inflow and Holocene faulting. Bristol Dry Lake has young volcanic deposits and Salar de Atacama has an active stratovolcano on its eastern margin, indicating subsurface magma bodies. A midcrustal magma chamber has been identified in southern Death Valley. Volcanism and faulting in these closed basins provides the heat source for hydrothermal-diagenetic processes and the energy and pathways to deliver these waters to the surface. |
| Starting Page | 71 |
| Ending Page | 94 |
| Page Count | 24 |
| File Format | |
| ISSN | 13806165 |
| Journal | Aquatic Geochemistry |
| Volume Number | 15 |
| Issue Number | 1-2 |
| e-ISSN | 15731421 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2008-12-02 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Closed basins Brine evolution Chemical divide Qaidam Basin Death Valley Salar de Atacama Bristol Dry Lake Ca–Cl inflow waters Hydrogeology Geochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geophysics Geochemistry and Petrology |
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