The deep structure of a sea-floor hydrothermal deposit

Robert A. Zierenberg; Yves Fouquet; D. J. Miller; J. M. Bahr; P. A. Baker; T. Bjerkgård; C. A. Brunner; R. C. Duckworth; R. Gable; J. Gieskes; W. D. Goodfellow; H. M. Gröschel-Becker; G. Guèrin; J. Ishibashi; G. Iturrino; R. H. James; K. S. Lackschewitz; L. L. Marquez; P. Nehlig; J. M. Peter; C. A. Rigsby; P. Schultheiss; W. C. Shanks; B. R.T. Simoneit; M. Summit; D. A.H. Teagle; M. Urbat; G. G. Zuffa

doi:10.1038/33126

The deep structure of a sea-floor hydrothermal deposit

Robert A. Zierenberg, Yves Fouquet, D. J. Miller, J. M. Bahr, P. A. Baker, T. Bjerkgård, C. A. Brunner, R. C. Duckworth, R. Gable, J. Gieskes, W. D. Goodfellow, H. M. Gröschel-Becker, G. Guèrin, J. Ishibashi, G. Iturrino, R. H. James, K. S. Lackschewitz, L. L. Marquez, P. Nehlig, J. M. PeterC. A. Rigsby, P. Schultheiss, W. C. Shanks, B. R.T. Simoneit, M. Summit, D. A.H. Teagle, M. Urbat, G. G. Zuffa

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Abstract

Hydrothermal circulation at the crests of mid-ocean ridges plays an important role in transferring heat from the interior of the Earth. A consequence of this hydrothermal circulation is the formation of metallic ore bodies known as volcanic-associated massive sulphide deposits. Such deposits, preserved on land, were important sources of copper for ancient civilizations and continue to provide a significant source of base metals (for example, copper and zinc). Here we present results from Ocean Drilling Program Leg 169, which drilled through a massive sulphide deposit on the northern Juan de Fuca spreading centre and penetrated the hydrothermal feeder zone through which the metal-rich fluids reached the sea floor. We found that the style of feeder-zone mineralization changes with depth in response to changes in the pore pressure of the hydrothermal fluids and discovered a stratified zone of high-grade copper-rich replacement mineralization below the massive sulphide deposit. This copper-rich zone represents a type of mineralization not previously observed below sea-floor deposits, and may provide new targets for land-based mineral exploration.

Original language	English
Pages (from-to)	485-488
Number of pages	4
Journal	Nature
Volume	392
Issue number	6675
DOIs	https://doi.org/10.1038/33126
Publication status	Published - Apr 2 1998
Externally published	Yes

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Zierenberg, R. A., Fouquet, Y., Miller, D. J., Bahr, J. M., Baker, P. A., Bjerkgård, T., Brunner, C. A., Duckworth, R. C., Gable, R., Gieskes, J., Goodfellow, W. D., Gröschel-Becker, H. M., Guèrin, G., Ishibashi, J., Iturrino, G., James, R. H., Lackschewitz, K. S., Marquez, L. L., Nehlig, P., ... Zuffa, G. G. (1998). The deep structure of a sea-floor hydrothermal deposit. Nature, 392(6675), 485-488. https://doi.org/10.1038/33126

Zierenberg, RA, Fouquet, Y, Miller, DJ, Bahr, JM, Baker, PA, Bjerkgård, T, Brunner, CA, Duckworth, RC, Gable, R, Gieskes, J, Goodfellow, WD, Gröschel-Becker, HM, Guèrin, G, Ishibashi, J, Iturrino, G, James, RH, Lackschewitz, KS, Marquez, LL, Nehlig, P, Peter, JM, Rigsby, CA, Schultheiss, P, Shanks, WC, Simoneit, BRT, Summit, M, Teagle, DAH, Urbat, M & Zuffa, GG 1998, 'The deep structure of a sea-floor hydrothermal deposit', Nature, vol. 392, no. 6675, pp. 485-488. https://doi.org/10.1038/33126

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abstract = "Hydrothermal circulation at the crests of mid-ocean ridges plays an important role in transferring heat from the interior of the Earth. A consequence of this hydrothermal circulation is the formation of metallic ore bodies known as volcanic-associated massive sulphide deposits. Such deposits, preserved on land, were important sources of copper for ancient civilizations and continue to provide a significant source of base metals (for example, copper and zinc). Here we present results from Ocean Drilling Program Leg 169, which drilled through a massive sulphide deposit on the northern Juan de Fuca spreading centre and penetrated the hydrothermal feeder zone through which the metal-rich fluids reached the sea floor. We found that the style of feeder-zone mineralization changes with depth in response to changes in the pore pressure of the hydrothermal fluids and discovered a stratified zone of high-grade copper-rich replacement mineralization below the massive sulphide deposit. This copper-rich zone represents a type of mineralization not previously observed below sea-floor deposits, and may provide new targets for land-based mineral exploration.",

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AU - Bjerkgård, T.

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AU - Peter, J. M.

AU - Rigsby, C. A.

AU - Schultheiss, P.

AU - Shanks, W. C.

AU - Simoneit, B. R.T.

AU - Summit, M.

AU - Teagle, D. A.H.

AU - Urbat, M.

AU - Zuffa, G. G.

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The deep structure of a sea-floor hydrothermal deposit

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