ODH019: Magmatic-hydrothermal systems and the formation of epithermal deposits - Jeffrey Hedenquist

[@SEGbetaTest]

Hmm, at least one to date is not a happy camper over the talk. Perhaps I did not give enough hints on where the next discovery will be (or rather, is). Thanks to the rest for watching. As the Ore Hub organizers said, slides are available at Research Gate.

[@TheJoseph0012]

Where will the next discovery be? 😏

[@igotufoinformation9636]

😄

[@pelletierjocelyn5564]

Jeffrey Hedenquist is from far the most qualified geologist that studied the Epithermal deposits. Thanks for his great generosity and to team that organized this great ''event''.

[@robertmoye7565]

Excellent presentation with great information backed by real world examples.

[@rodneyjsnider8540]

Bravo, nice description of the magmatic systems!

[@christianenriquevargassern2620]

Merci beaucoup, grand présentation!

[@abdonecbishop]

Enjoyed....nice video........ in the cartoon at 8:17:07...... May we imagine putting a physic's Hamiltonian operators for (Uranium, K) nuclei concentration at base of porphyry outlined in cartoon. That will simulate/generate a broad smooth vertical temperature gradient up and into the surrounding lithosphere or cap rock containing an epidote-chlorite solid-solution major mineral embedded in whole rock major mineral assemblage and used to classify the type of rock observed.

[@abdonecbishop]

The cartoon's vertical scale is important, where would the Moho be placed relative to the base of porphyry, assuming the porphyry is a cooled residual magma chamber that once in the past had a much lower viscosity than its surrounding lithosphere. The magma chamber viscosity models to be dependent on the proportions of crystal to fluid bound by the walls of the magma chamber. Work is done by both conductive and convective forces acting in the magma chamber, exerting a differential pressure and temperature across a solvus surface that is the boundary of the magma chamber. The magma chamber can be characterized as a 3-cycle Carnot motor doing work on upper lithosphere, fueled by the free energy released through weak force K and U decay events, generating both local density and temperature changes within the magma chamber.

[@meilani-2163]

Thankyou Pak Jeffrey!

[@nurhadiwibowo3978]

Good presentation and recharge the exploration energy

[@diegofebrerovalenzuela6348]

22:36 That is the fluid that carry the most of the ore? also metals in that fluid are in liquid or gas state?

[@ahmedaldom7150]

Thank you so much for information ☺

[@anagy20]

9:55 omg Universidad de Bogotá. MI GENTE LATINO. Psa: Thanks for the presentation.

[@goodman1098]

Nice presentation, a huge thanks 😊

[@antonkutyrev3090]

Very useful lection, thank you!

[@kyihtun7491]

Thank you for excllent presentation

[@simabayat2175]

great presentation, thanks

[@andrewt5400]

how about obout southern Chile below 600m ...near coast?

[@edward05lan]

Thanks for sharing

[@6554532]

Great presentation! What is the typical depth base of HS environment to porphyry? 1-2km? Yanacocha has some classic transitional features like patchy and wormy texture. But I wonder if the porphyry below is too deep to be economic? The Lepanto example seems different from the classic model in which the lithocap sits off the the side porphyry center.

[@SEGbetaTest]

The transition is typically ~1 km below the paleosurface. The Lepanto lithocap and enargite-Au deposit, offset from the deeper Far Southeast porphyry, is typical of this relationship. The epithermal environment at

[@indonesiangeologist5993]

Many thanks !!

[@melissarodriguez9757]

Merci beaucoup!

[@6554532]

Please upload Antonio's Nov 25th talk on AA alteration

[@SEGbetaTest]

All Ore Hub talks are on YouTuba a day or two after presentation. Antonio's talk on advanced argillic alteration is at: kzbin.info/www/bejne/hZTRgGitfbWgm7s Also a talk on the same subject, in Spanish , at: kzbin.info/www/bejne/Z5DdkKqIiLmooas

[@valls_geoconsultant]

the slides are not showing

[@jeanpazhuaman7410]

Thanks a lot!

[@junioralejandro1071]

Pasen las diapositivas

[@RustyAtwood-s1p]

Thanks for the info in this video ☺️ Owner of Alaska Rare Earth LLC

[@cooljingmoney]

thanks!