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Chinese Science Bulletin

, 56:2828 | Cite as

Mineralogical and geochemical features of sulfide chimneys from the 49°39′E hydrothermal field on the Southwest Indian Ridge and their geological inferences

  • ChunHui TaoEmail author
  • HuaiMing Li
  • Wei Huang
  • XiQiu Han
  • GuangHai Wu
  • Xin Su
  • Ning Zhou
  • Jian Lin
  • YongHua He
  • JianPing Zhou
Open Access
Article Oceanology

Abstract

During January–May in 2007, the Chinese research cruise DY115-19 discovered an active hydrothermal field at 49°39′E/37°47′S on the ultraslow spreading Southwest Indian Ridge (SWIR). This was also the first active hydrothermal field found along an ultraslow-spreading ridge. We analyzed mineralogical, textural and geochemical compositions of the sulfide chimneys obtained from the 49°39′E field. Chimney samples show a concentric mineral zone around the fluid channel. The mineral assemblages of the interiors consist mainly of chalcopyrite, with pyrite and sphalerite as minor constitunets. In the intermediate portion, pyrite becomes the dominant mineral, with chalcopyrite and sphalerite as minor constitunets. For the outer wall, the majority of minerals are pyrite and sphalerite, with few chalcopyrite. Towards the outer margin of the chimney wall, the mineral grains become small and irregular in shape gradually, while minerals within interstices are abundant. These features are similar to those chimney edifices found on the East Pacific Rise and Mid-Atlantic Ridge. The average contents of Cu, Fe and Zn in our chimney samples were 2.83 wt%, 45.6 wt% and 3.28 wt%, respectively. The average Au and Ag contents were up to 2.0 ppm and 70.2 ppm respectively, higher than the massive sulfides from most hydrothermal fields along mid-ocean ridge. The rare earth elements geochemistry of the sulfide chimneys show a pattern distinctive from the sulfides recovered from typical hydrothermal fields along sediment-starved mid-ocean ridge, with the enrichment of light rare earth elements but the weak, mostly negative, Eu anomaly. This is attributed to the distinct mineralization environment or fluid compositions in this area.

Keywords

sulfide chimneys 49°39′E hydrothermal field Southwest Indian Ridge mid-ocean ridge DY115-19 Chinese cruise 

References

  1. 1.
    Corliss J B, Dymond J, Gordon L I, et al. Submarine thermal springs on the Galápagos Rift. Science, 1979, 203: 1073–1083CrossRefGoogle Scholar
  2. 2.
    Baker E T, German C R. On the distribution of hydrothermal vent fields. In: German C R, Lin J, Parson L M, eds. Mid-Ocean Ridges: Hydrothermal interactions between the lithosphere and oceans. Geophysical Monograph, AGU, Washington, DC, 2004. 245–266Google Scholar
  3. 3.
    Banerjee R, Ray D. Metallogenesis along the Indian Ocean Ridge system. Curr Sci, 2003, 85: 321–327Google Scholar
  4. 4.
    Chen Y J, Morgan J P. The effect of magma emplacement geometry, spreading rate, and crustal thickness on hydrothermal heat flux at mid-ocean ridge axes. J Geol Res, 1996, 101: 475–482Google Scholar
  5. 5.
    Chen Y J, Lin J. Mechanisms for the formation of ridge-axis topography at slow-spreading ridges: A lithospheric-plate flexural model. Geophys J Int, 1999, 136: 8–18CrossRefGoogle Scholar
  6. 6.
    Georgen J E, Lin J, Dick H J B. Evidence from gravity anomalies for interactions of the Marion and Bouvet hotspots with the Southwest Indian Ridge: Effects of transform offsets. Earth Planet Sci Lett, 2001, 187: 283–300CrossRefGoogle Scholar
  7. 7.
    Muller M R, Minshull T A, White R S. Segmentation and melt supply at the Southwest Indian Ridge. Geology, 1999, 27: 867–870CrossRefGoogle Scholar
  8. 8.
    Sauter D, Patriat P, Rommevaux-Jestin C, et al. The Southwest Indian Ridge between 49°15′E and 57°E: Focused accretion and magma redistribution. Earth Planet Sci Lett, 2001, 192: 303–317CrossRefGoogle Scholar
  9. 9.
    Georgen J E, Kurz M D, Henry J B, et al. Low 3He/4He ratios in basalt glasses from the western Southwest Indian Ridge (10°–24°E). Earth Planet Sci Lett, 2003, 206: 509–528CrossRefGoogle Scholar
  10. 10.
    Baker E T, Edmonds H N, Michael P J, et al. Hydrothermal venting in magma deserts: The ultraslow spreading Gakkel and Southwest Indian Ridges. Geochem Geophys Geosyst, 2004, 5: 1–24CrossRefGoogle Scholar
  11. 11.
    German C R, Baker E T, Mevel C, et al. Hydrothermal activity along the southwest Indian ridge. Nature, 1998, 395: 490–493CrossRefGoogle Scholar
  12. 12.
    Bach W, Banerjee N R, Dick H J B, et al. Discovery of ancient and active hydrothermal systems along the ultra-slow spreading Southwest Indian Ridge 10°–16°E. Geochem Geophys Geosyst, 2002, 3: 1044CrossRefGoogle Scholar
  13. 13.
    Münch U, Lalou C, Halbach P, et al. Relict hydrothermal events along the super-slow Southwest Indian spreading ridge near 63°56′Emineralogy, chemistry and chronology of sulfide samples. Chem Geol, 2001, 177: 341–349CrossRefGoogle Scholar
  14. 14.
    Banerjee R, Dick J B H, Wolfgang B, et al. Discovery of peridotitehosted hydrothermal deposits along the ultraslow-spreading Southwest Indian Ridge. Geol Soc Am Annu Meet, Boston, 2001. 800Google Scholar
  15. 15.
    Dick H J B, Lin J, Schouten H. An ultraslow-spreading class of ocean ridge. Nature, 2003, 426: 405–412CrossRefGoogle Scholar
  16. 16.
    Font L, Murton B J, Roberts S, et al. Variations in melt productivity and melting conditions along SWIR (70°–49°E): Evidence from olivine-hosted and plagioclase-hosted melt inclusions. J Petrol, 2007, 48: 1471–1494CrossRefGoogle Scholar
  17. 17.
    Cannat M, Sauter D, Mendel V, et al. Modes of seafloor generation at a melt-poor ultraslow-spreading ridge. Geology, 2006, 34: 605–608CrossRefGoogle Scholar
  18. 18.
    Sauter D, Carton H, Meyzen C, et al. Ridge segmentation and the magnetic structure of the Southwest Indian Ridge (at 50°300′E, 55°300′E and 66°200′E): Implications for magmatic processes at ultraslow-spreading centers. Geochem Geophys Geosyst, 2004, 5: Q05K08CrossRefGoogle Scholar
  19. 19.
    Sauter D, Mendel V, Rommevaux-Jestin C, et al. Focused magmatism versus amagmatic spreading along the ultra-slow spreading Southwest Indian Ridge: Evidence from TOBI side scan sonar imagery. Geochem Geophys Geosys, 2004, 5: Q10K09CrossRefGoogle Scholar
  20. 20.
    Cannat M, Sauter D, Bezos A, et al. Spreading rate, spreading obliquity, and melt supply at the ultraslow spreading Southwest Indian Ridge. Geochem Geophys Geosys, 2008, 9: Q04002CrossRefGoogle Scholar
  21. 21.
    Gautheron C E, Bezos A, Moreira M, et al. Helium and trace element geochemical signals in the southwest Indian Ridge. Goldschmidt Conference Abstracts. Geoch Cosmoch Acta, 2008, 72: A300Google Scholar
  22. 22.
    Sauter D, Cannat M, Meyzen C, et al. Propagation of a melting anomaly along the ultra-slow Southwest Indian Ridge between 46°E and 52°20′E: Interaction with the Crozet hot-spot? En révision après corrections modérées pour publication. Geophys J Int, 2009, 179: 1–22CrossRefGoogle Scholar
  23. 23.
    Zhang T, Gao J Y, Tan Y H, et al. Effect of transform faults in the ridge-plume interaction system on the SWIR and sources of hydrothermal indications in the water column (in Chinese). Conference Abstracts of Proceedings of the 2nd Forum on Submarine Geosciences, 2007, 12Google Scholar
  24. 24.
    Muller M R, Minshull T A, White R S. Crustal structure of the Southwest Indian Ridge at the Atlantis Fracture II e Zone. J Geophys Res, 2000, 105: 25809–25828CrossRefGoogle Scholar
  25. 25.
    Münch U, Blum N, Halbach P. Mineralogical and geochemical features of sulfide chimneys from the MESO zone, Central Indian Ridge. Chem Geol, 1999, 155: 29–44CrossRefGoogle Scholar
  26. 26.
    Haymon R M. Growth history of hydrothermal black smoker chimneys. Nature, 1983, 301: 695–698CrossRefGoogle Scholar
  27. 27.
    Janecky D R, Seyfried W E. Formation of massive sulfide deposits on oceanic ridge crest: Incremental reaction models for mixing between hydrothermal solutions and seawater. Geoch Cosmoch Acta, 1984, 48: 2723–2738CrossRefGoogle Scholar
  28. 28.
    Tivey M K, Humphris S E, Thompson G, et al. Deducing patterns of fluid flow and mixing within the TAG active hydrothermal mound using mineralogical and geochemical data. J Geophys Res, 1995, 100: 12527–12555CrossRefGoogle Scholar
  29. 29.
    Rona P A, Klinkhammer G, Nelsen T A, et al. Black smokers, massive sulfides and vent biota at the mid-ocean ridge. Nature, 1986, 321: 33–37CrossRefGoogle Scholar
  30. 30.
    Graham U M, Bluth G L, Ohmoto H. Sulfide-sulfate chimneys on the East-Pacific Rise, 11°N and 13°N latitudes: Part I. Mineralogy and paragenesis. Can Mineral, 1988, 26: 487–504Google Scholar
  31. 31.
    Hekinian R, Fouquet Y. Volcanism and metallogenesis of axial and off-axial structures on the East Pacific Rise near 13°N. Econ Geol, 1985, 80: 221–249CrossRefGoogle Scholar
  32. 32.
    Zeng Z G, Jiang F Q, Qin Y S, et al. Rare earth element geochemistry of massive sulfides from the Jade hydrothermal field in the central Okinawa Trough (in Chinese). Acta Geol Sin, 2001, 75: 244–249Google Scholar
  33. 33.
    Allen D E, Seyfried W E. REE controls in ultramafic hosted MOR hydrothermal systems: An experimental study at elevated temperature and pressure. Geochim Cosmochim Acta, 2005, 69: 675–683CrossRefGoogle Scholar
  34. 34.
    Douville E, Bienvenu P, Charlou J L, et al. Yttrium and rare earth elements in fluids from various deep-sea hydrothermal systems. Geochim Cosmochim Acta, 1999, 63: 627–643CrossRefGoogle Scholar
  35. 35.
    Humphris S E. Rare earth element composition of anhydrite: Implications for deposition and mobility within the TAG hydrothermal mound. Proc ODP, Sci Results, 158: 143–159Google Scholar
  36. 36.
    Sverjensky D A. Europium redox equilibria in aqueous sotution. Earth Planet Sci Lett, 1984, 67: 70–78CrossRefGoogle Scholar
  37. 37.
    Bach W, Roberts S, Vanko D A, et al. Controls of fluid chemistry and complexation contents of anhydrite from the Pacmanus subsea-floor hydrothermal system, Manus Basin, Papua New Guinea. Mineral Deposit, 2003, 38: 916–935CrossRefGoogle Scholar
  38. 38.
    Marchig V, Blum N, Roonwal G. Massive sulfide chimneys from the East pacific Rise at 7°24′S and 16°34′S. Mar Geores Geoth, 1997, 15: 49–66CrossRefGoogle Scholar
  39. 39.
    Bogdanov Y, Gurich E, Kuptsov V, et al. Relict sulfide mounds at the TAG hydrothermal field of the Mid-Atlantic Ridge (26°N, 45°W). Oceanology, 1995, 34: 534–542Google Scholar
  40. 40.
    Halbach P, Pracejus B, Maerten A. Geology and mineralogy of massive sulfide ores from the central Okinawa Trough, Japan. Econ Geol, 1993, 88: 2210–2225CrossRefGoogle Scholar

Copyright information

© The Author(s) 2011

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • ChunHui Tao
    • 1
    Email author
  • HuaiMing Li
    • 1
  • Wei Huang
    • 2
  • XiQiu Han
    • 1
  • GuangHai Wu
    • 1
  • Xin Su
    • 3
  • Ning Zhou
    • 4
  • Jian Lin
    • 5
  • YongHua He
    • 1
  • JianPing Zhou
    • 1
  1. 1.Key Laboratory of Submarine Geosciences, Second Institute of OceanographyState Oceanic AdministrationHangzhouChina
  2. 2.Qingdao Institute of Marine GeologyQingdaoChina
  3. 3.China University of Geosciences (Beijing)BeijingChina
  4. 4.China Ocean Mineral Resources Research and Development AssociationBeijingChina
  5. 5.Woods Hole Oceanographic InstitutionWoods HoleUSA

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