Letter | Published:

Changing hydrothermal activity in the Atlantis II Deep geothermal system



THE Atlantis II Deep is a pool of hot saline brine at the bottom of the central rift in the Red Sea (Fig. 1). Since its discovery in 1965 (ref. 1) it has undergone repeated detailed investigations2,3. A permanent increase of temperature has been reported by many workers4–8 and was interpreted as the result of the injection of hot brine to the system. The temperature of the inflowing brine was estimated to range between 110 and 210 °C (refs 6, 8). We have reinvestigated (after five years) the Atlantis II Deep on board RV Sonne. We report here the results of temperature measurements which were carried out in November 1977.

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    Miller, A. R. et al. Geochim. cosmochim. Acta 30, 341–359 (1966).

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    Degens, E. T. & Ross, D. A. (eds) Hot Brines and Recent Heavy Metal Deposits in the Red Sea (Springer, New York, 1969).

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    Bäcker, H. & Richter, H. Geol. Rdsch. 62, 697–741 (1973).

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    Krause, G. & Ziegenbein, J. Meteor-Forsch. Erg. A1, 53–58 (1966).

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    Brewer, P. G., Densmore, C. D., Munns, R. & Stanley, R. J. Hot Brines and Recent Heavy Metal Deposits in the Red Sea (eds Degens, E. T. & Ross, D. A.) 138–147 (Springer, New York, 1969).

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    Brewer, P. G., Wilson, T. R. S., Murray, J. W., Munns, R. G. & Densmore, C. D. Nature 231, 37–38 (1971).

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    Schoell, M. & Hartmann, M. Mar. Geol. 14, 1–14 (1973).

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    Schoell, M. Proc., 2nd UN Symp. on the Development and Use of Geothermal Resources 1, 583–590 (1976).

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    Scheuch, J. thesis, Univ. Berlin (1974).

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    Bäcker, H. Erzmetall 26, 544–555 (1973).

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    White, D. E., Muffler, L. J. P. & Truesdell, A. H. Econ. Geol. 66, 75–97 (1971).

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    White, D. E. US Geol. Surv. Prof. Pap. 458-C, 109 (1968).

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