How can I look for geochemical evidence for hydrothermal activity in rocks within and in the vicinity of a fault zone? Are there any isotopic or trace element signals indicating alteration?
Dear Sair
I think the links below will benefit you in your search
Article Geochemical evidence of melt intrusions along Lithospheric f...
https://academic.oup.com/petrology/article/41/9/1439/1501247
Article Geochemistry and Origin of the Ore-Forming Fluids in Hydroth...
Article Geochemistry of hydrothermal gold deposits: A review
Best Regards
Thank you Osama Rahil! My research is about a Li brine deposit in the salar de Atacama. He3 isotope analysis would be an interesting field for my research. I am doing research on a Li brine deposit and trying to make statements of how to distinguish between magmatic and hydrothermal derived Li...
May I recommend the following papers (please see attached) dealing with geochemical evidence for fluids along fault zones:
May I recommend the following papers (please see attached) dealing with geochemical evidence for fluids along fault zones:
Dear Mr. Krebbers:
Brines in the salars of the Atacama desert bearing Li and certainly other compounds such as those containing B , Ca chloride… and hydrothermal as well as magmatic activities along fault zones sounds “ a bit from everything” and is rather vague. My suggestion is simply, be more precise and disclose what the environment you study looks like. Otherwise it is difficult to respond in a proper way.
Sincerely yours
H.G.Dill
Hi Leonard, in porphyry Cu environments (e.g. northern Chile) it is very common that hydrothermal fluids can bleed out from the center of the systems into structures in the vicinity. This typically results in structurally controlled sericite-silica alteration, especially along deep-seated and long-lived structures. Geochemically, the sericite alteration is commonly defined by elevated Sn and Li anomalies. Kind regards Daniel
As Daniel noted, the principal record of magmatic hydrothermal fluid movement along structures is alteration of the wall rock. These secondary minerals depend on the reactivity of the fluid (K feldspar at near neutral pH and alunite etc. at acidic pH) and its temperature (biotite at high temperature, clays at low temperature, with reactive conditions at intermediate, 300-400 C, forming white mica or pyrophyllite).
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