Antarctica pp 55-62 | Cite as

Late Pan-African Fluid Infiltration in the Mühlig-Hofmann- and Filchnerfjella of Central Dronning Maud Land, East Antarctica

  • Ane K. Engvik
  • Synnøve Elvevold


The nunataks of Mühlig-Hofmannfjella and Filchnerfjella in central Dronning Maud Land, East Antarctica, comprise a deep-seated metamorphic-plutonic rock complex, dominated by a dark colour due to dark feldspar and containing granulite facies minerals including perthite, plagioclase, orthopyroxene and garnet. The area was affected by a late Pan-African fluid infiltration outcropping as conspicuous light alteration zones restricted to halos around thin granitoid veins. The veins were formed during infiltration of volatile-rich melts, probably originating from underlying magma-chambers. The alteration halos were formed by CO2-H2O-volatiles emanating from the veins into the host rock causing hydration of the granulite facies assemblages. The alteration involves a breakdown of orthopyroxene to biotite and sericitisation of plagioclase at crustal conditions around 350–400°C and 2 kbar. The marked colour change is caused by transformation of feldspars, spread of dusty micas, opaques and fluid inclusions in addition to replacement of coarse to finer grains. The process is locally penetrative indicating that fluid infiltration can affect large rock volumes. The frequent distribution of alteration zones throughout the mountain range independent of lithological variations shows that the fluid infiltration is regionally extensive.


Fluid Inclusion Alteration Zone Contrib Mineral Petrol Altered Rock Granulite Facies 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bomparola RM, Ghezzo C, Belousova E, Dallai L, Griffin WL, O’Reilly SYO (2003) Chemical response of zircon to fluid infiltration and high-T deformation: Howard Peaks Intrusive Complex (northern Victoria Land, Antarctica), a case study. Terra Nostra 2003(4):35Google Scholar
  2. Bucher-Nurminen K, Ohta Y (1993) Granulites and garnet-cordierite gneisses from Dronning Maud Land, Antarctica. J Metamorph Geol 11:691–703Google Scholar
  3. Carter NL, Kronenberg AK, Ross JV, Wiltschko DV (1990) Control of fluids on deformation of rocks. In: Knipe RJ, Rutter EH (eds) Deformation mechanisms, rheology and tectonics. Geol Soc London Spec Publ 54:1–13Google Scholar
  4. Dimanov A, Dresen G, Xiao X, Wirth R (1999) Grain boundary diffusion creep of synthetic anorthite aggregates: The effect of water. J Geophys Res 104B5:0483–10497CrossRefGoogle Scholar
  5. Engvik AK, Elvevold S (in press) Pan-African extension and near-isothermal exhumation of a granulite facies terrain, Dronning Maud Land, Antarctica. Geol MagGoogle Scholar
  6. Engvik AK, Kalthoff J, Bertram A, Stöckhert B, Austrheim H, Elvevold S (2005) Magma-driven hydraulic fracturing and infiltration of fluids into the damaged host rock, an example from Dronning Maud Land, Antarctica. J Structural Geol 27:839–854CrossRefGoogle Scholar
  7. Erambert M, Austrheim H (1993) The effect of fluid and deformation on zoning and inclusion patterns in poly-metamorphic garnets. Contrib Mineral Petrol 115:204–214CrossRefGoogle Scholar
  8. Fitzgerald JD, Stünitz H (1993) Deformation of granitoids at low metamorphic grade. I: Reactions and grain size reduction. Tectonophysics 221:269–297CrossRefGoogle Scholar
  9. Jacobs J, Fanning CM, Henjes-Kunst F, Olesch M, Paech H-J (1998) Continuation of the Mozambique Belt into East Antarctica: Grenville-Age metamorphism and polyphase Pan-African high-grade events in central Dronning Maud Land. J Geol 106:385–406CrossRefGoogle Scholar
  10. Jacobs J, Klemd R, Fanning CM, Bauer W, Colombo F (2003) Extensional collapse of the late Neoproterozoic-Early Paleozoic East African-Antarctic Orogen in central Dronning Maud Land, East Antarctica. In: Yoshida M, Windley BF, Dasgupta S (eds) Proterozoic East Gondwana: supercontinent assembly and breakup. Geol Soc London Spec Publ 206:271–288Google Scholar
  11. Kretz R (1983) Symbols for rock-forming minerals. Amer Mineral 68:277–279Google Scholar
  12. Lee MR, Parson I (1997) Dislocation formation and albitization in alkali feldspars from the Shap granite. Amer Mineral 82:557–570Google Scholar
  13. Markl G, Piazolo S (1998) Halogen-bearing minerals in syenites and high-grade marbles of Dronning Maud Land, Antarctica: monitors of fluid compositional changes during late-magmatic fluid-rock interaction processes. Contrib Mineral Petrol 132:246–268CrossRefGoogle Scholar
  14. Mikhalsky EV, Beliatsky EV, Savva EV, Wetzel H-U, Federov LV, Weiser T, Hahne K (1997) Reconnaissance geochronologic data on polymetamorphic and igneous rocks of the Humboldt Mountains, central Queen Maud Land, East Antarctica. In: Ricci CA (ed) The Antarctic region: geological evolution and processes. Terra Antartica Publications, Siena, pp 45–53Google Scholar
  15. Ohta Y (1999) Nature Environment map, Gjelsvikfjella and Western Mühlig-Hofmannfjella, sheets 1 and 2, Dronning Maud Land. Temakart nr. 24, Norsk Polarinstitutt, TromsøGoogle Scholar
  16. Parson I, Lee MR (2000) Alkali feldspars as microtextural markers of fluid flow. In: Stober I, Bucher K (eds) Hydrogeology of crystalline rocks. Kluwer Academic Publishers, Amsterdam, pp 27–50Google Scholar
  17. Paulsson O (2003) U-Pb geochronology of tectonothermal events related to the Rodinia and Gondwana supercontinents. Litholund theses no. 2, Univ LundGoogle Scholar
  18. Paulsson O, Austrheim H (2003) A geochronological and geochemical study of rocks from Gjelsvikfjella, Dronning Maud Land, Antarctica — implications for Mesoproterozoic correlations and assembly of Gondwana. Precambrian Res 125:113–138CrossRefGoogle Scholar
  19. Que M, Allen AR (1996) Sericitization of plagioclase in Rosses Granite Complex, Co. Donegal, Ireland. Mineral Mag 60:927–939Google Scholar
  20. Roedder E (1984) Fluid inclusions. Mineral Soc Amer Rev Mineral 12Google Scholar
  21. Rubie DC (1990) Mechanisms of reaction-enhanced deformability in minerals and rocks. In: Barber DJ Meredith PG (eds) Deformation processes in minerals, ceramics and rocks. Unwin Hyman, London, pp 262–295Google Scholar
  22. Spear FS (1981) An experimental study of hornblende stability and compositional variability in amphibolite. Amer J Sci 281:697–734CrossRefGoogle Scholar
  23. Spear FS (1993) Metamorphic phase equilibria and pressure-temperature-time paths. Mineral Soc Amer, WashingtonGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Ane K. Engvik
    • 1
  • Synnøve Elvevold
    • 2
  1. 1.Geological Survey of NorwayTrondheimNorway
  2. 2.Norwegian Polar InstituteTromsøNorway

Personalised recommendations