Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin

P. Halbach; Ko Ichi Nakamura; M. Wahsner; J. Lange; H. Sakai; L. Käselitz; R. D. Hansen; M. Yamano; J. Post; B. Prause; R. Seifert; W. Michaelis; F. Teichmann; M. Kinoshita; A. Märten; J. Ishibashi; S. Czerwinski; N. Blum

doi:10.1038/338496a0

Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin

P. Halbach, Ko Ichi Nakamura, M. Wahsner, J. Lange, H. Sakai, L. Käselitz, R. D. Hansen, M. Yamano, J. Post, B. Prause, R. Seifert, W. Michaelis, F. Teichmann, M. Kinoshita, A. Märten, J. Ishibashi, S. Czerwinski, N. Blum

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Abstract

THE volcanogenic massive sulphide deposits of the Hokuroko district of Japan are Miocene metal occurrences which are rich in both Zn and Pb, contain minor Cu and yield noteworthy amounts of Ag and Au (ref. 1). They formed in the Green Tuff belt of Japan in association with the felsic calc-alkaline rocks of a back-arc spreading center¹. Until now no modern analogue of this 'Kuroko' type of sulphide deposit has been identified; this is in contrast to the Cyprus type of massive Cu-Zn sulphide deposit, which has such an analogue in the 'smoker' deposits of the East Pacific Rise. In 1984 and 1986, low-temperature oxide and silicate precipitates were discovered in the rift valley of the Okinawa Trough attesting to the recent occurrence of hydrothermal activity in this intracontinental back-arc basin². On 26 June 1988, a large hydrothermal field with extensive occurrences of sulphide mineralization (the Jade hydrothermal field) was discovered and sampled by the German research vessel Sonne in a cauldron in the central part of the Okinawa Trough. Here we report geochemical and isotopic results which suggest that the Jade deposit is a modern analogue of the Kuroko-type deposits known so far only from the geological record.

Original language	English
Pages (from-to)	496-499
Number of pages	4
Journal	Nature
Volume	338
Issue number	6215
DOIs	https://doi.org/10.1038/338496a0
Publication status	Published - Jan 1 1989
Externally published	Yes

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Halbach, P., Nakamura, K. I., Wahsner, M., Lange, J., Sakai, H., Käselitz, L., Hansen, R. D., Yamano, M., Post, J., Prause, B., Seifert, R., Michaelis, W., Teichmann, F., Kinoshita, M., Märten, A., Ishibashi, J., Czerwinski, S., & Blum, N. (1989). Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin. Nature, 338(6215), 496-499. https://doi.org/10.1038/338496a0

Halbach, P, Nakamura, KI, Wahsner, M, Lange, J, Sakai, H, Käselitz, L, Hansen, RD, Yamano, M, Post, J, Prause, B, Seifert, R, Michaelis, W, Teichmann, F, Kinoshita, M, Märten, A, Ishibashi, J, Czerwinski, S & Blum, N 1989, 'Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin', Nature, vol. 338, no. 6215, pp. 496-499. https://doi.org/10.1038/338496a0

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title = "Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin",

abstract = "THE volcanogenic massive sulphide deposits of the Hokuroko district of Japan are Miocene metal occurrences which are rich in both Zn and Pb, contain minor Cu and yield noteworthy amounts of Ag and Au (ref. 1). They formed in the Green Tuff belt of Japan in association with the felsic calc-alkaline rocks of a back-arc spreading center1. Until now no modern analogue of this 'Kuroko' type of sulphide deposit has been identified; this is in contrast to the Cyprus type of massive Cu-Zn sulphide deposit, which has such an analogue in the 'smoker' deposits of the East Pacific Rise. In 1984 and 1986, low-temperature oxide and silicate precipitates were discovered in the rift valley of the Okinawa Trough attesting to the recent occurrence of hydrothermal activity in this intracontinental back-arc basin2. On 26 June 1988, a large hydrothermal field with extensive occurrences of sulphide mineralization (the Jade hydrothermal field) was discovered and sampled by the German research vessel Sonne in a cauldron in the central part of the Okinawa Trough. Here we report geochemical and isotopic results which suggest that the Jade deposit is a modern analogue of the Kuroko-type deposits known so far only from the geological record.",

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doi = "10.1038/338496a0",

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T1 - Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin

AU - Halbach, P.

AU - Nakamura, Ko Ichi

AU - Wahsner, M.

AU - Lange, J.

AU - Sakai, H.

AU - Käselitz, L.

AU - Hansen, R. D.

AU - Yamano, M.

AU - Post, J.

AU - Prause, B.

AU - Seifert, R.

AU - Michaelis, W.

AU - Teichmann, F.

AU - Kinoshita, M.

AU - Märten, A.

AU - Ishibashi, J.

AU - Czerwinski, S.

AU - Blum, N.

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N2 - THE volcanogenic massive sulphide deposits of the Hokuroko district of Japan are Miocene metal occurrences which are rich in both Zn and Pb, contain minor Cu and yield noteworthy amounts of Ag and Au (ref. 1). They formed in the Green Tuff belt of Japan in association with the felsic calc-alkaline rocks of a back-arc spreading center1. Until now no modern analogue of this 'Kuroko' type of sulphide deposit has been identified; this is in contrast to the Cyprus type of massive Cu-Zn sulphide deposit, which has such an analogue in the 'smoker' deposits of the East Pacific Rise. In 1984 and 1986, low-temperature oxide and silicate precipitates were discovered in the rift valley of the Okinawa Trough attesting to the recent occurrence of hydrothermal activity in this intracontinental back-arc basin2. On 26 June 1988, a large hydrothermal field with extensive occurrences of sulphide mineralization (the Jade hydrothermal field) was discovered and sampled by the German research vessel Sonne in a cauldron in the central part of the Okinawa Trough. Here we report geochemical and isotopic results which suggest that the Jade deposit is a modern analogue of the Kuroko-type deposits known so far only from the geological record.

AB - THE volcanogenic massive sulphide deposits of the Hokuroko district of Japan are Miocene metal occurrences which are rich in both Zn and Pb, contain minor Cu and yield noteworthy amounts of Ag and Au (ref. 1). They formed in the Green Tuff belt of Japan in association with the felsic calc-alkaline rocks of a back-arc spreading center1. Until now no modern analogue of this 'Kuroko' type of sulphide deposit has been identified; this is in contrast to the Cyprus type of massive Cu-Zn sulphide deposit, which has such an analogue in the 'smoker' deposits of the East Pacific Rise. In 1984 and 1986, low-temperature oxide and silicate precipitates were discovered in the rift valley of the Okinawa Trough attesting to the recent occurrence of hydrothermal activity in this intracontinental back-arc basin2. On 26 June 1988, a large hydrothermal field with extensive occurrences of sulphide mineralization (the Jade hydrothermal field) was discovered and sampled by the German research vessel Sonne in a cauldron in the central part of the Okinawa Trough. Here we report geochemical and isotopic results which suggest that the Jade deposit is a modern analogue of the Kuroko-type deposits known so far only from the geological record.

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Probable modern analogue of Kuroko-type massive sulphide deposits in the Okinawa Trough back-arc basin

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