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(2020) Mineral Chemistry and Pb Isotope Compositions of Seafloor Hydrothermal Deposits Obtained by Drillings in the Gondou Field, Okinawa Trough: Preferable Modern Analogue of Kuroko Deposit

Totsuka S, Shimada K, Nozaki T, Kimura J-I, Chang Q & Ishibashi J-I

https://doi.org/10.46427/gold2020.2616

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08m: Room 3, Tuesday 23rd June 22:18 - 22:21

Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.

Submitted by Daniel Gregory on Thursday 18th June 22:57
Thank you for the presentation. Can you say a few words on how the Gondou field differs from the other fields in the Okinawa trough? Also, how it differs from the other modern vent fields discussed within this session (i.e. those discussed by Anderson, Nozaki, Qui, Jamieson)?
Thank you for your question. Briefly speaking, the Gondou field has BOTH black ore (sphalerite and galena-rich ore body) and yellow ore (chalcopyrite-rich ore body), whereas chalcopyrite-rich ore is rare in other fields is the Okinawa Trough. For example, the Izena field where Nozaki-san presented is characterized by abundant pyrite/marcasite ores with some sphalerite, galena and trace chalcopyrite. The second question is a good question, but beyond my present study and my future study goal.

Submitted by Melissa Anderson on Tuesday 23rd June 19:17
Many modern hydrothermal vent fields have both Zn-rich and Cu-rich assemblages. How does the tectonic setting of the Gondou field compare with the Kuroko deposits?


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