Ore Genesis pp 345-350 | Cite as

Plasticity of Cryolite and Brecciation in the Cryolite Deposit, Ivigtut, South Greenland

  • H. Pauly
Conference paper
Part of the Special Publication of the Society for Geology Applied to Mineral Deposits book series (MINERAL DEPOS., volume 2)

Abstract

Two breccia samples from the Ivigtut cryolite deposit are described because they obviously were formed under conditions not involving intensive chemical reactions between the rock fragments and the cryolite which acts as a cementing material in the breccias. In order to explain the breccia formation it seems that it is necessary to expect cryolite to have a rather high mobility as a plastic solid at moderately elevated temperatures. Such a behaviour of cryolite must be taken into account also in the evaluation of the formation of the deposit, because it may have obliterated much of the early formed structures within the deposit.

Keywords

Quartz Graphite Sulphide Fluoride Brittle 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bøgvad R (1940) Sort kryolit. Medd Dansk Geol Foren 9:561–564Google Scholar
  2. Handin J (1966) Strength and ductility. Handbook of Physical Constants, Geol Soc Am Mem 97: 223Google Scholar
  3. Handin J (1966) Strength and ductility. Handbook of Physical Constants, Geol Soc Am Mem 97: Hoa 193 289Google Scholar
  4. Karup-Møiler S (1973) A gustavite-cosalite-galena-bearing mineral suite from the cryolite deposit at Ivigtut, South Greenland. Medd Grønl 195:1–40Google Scholar
  5. Landon GI, Ubbelohde AR (1956) Volume changes on melting ionic crystals. Trans Faraday Soc 52:647–651CrossRefGoogle Scholar
  6. Landon GI, Ubbelohde AR (1957) Melting and crystal structure of cryolite (3NaF, AlF3). Proc R Soc London Ser A 240:150–172Google Scholar
  7. Oen IS, Pauly H (1967) A sulphide paragenesis with pyrrhotite and marcasite in the siderite-cryolite ore of Ivigtut, South Greenland. Medd Grønl 175:1–55Google Scholar
  8. Pauly H (1960) Paragenetic relations in the main cryolite ore of Ivigtut, South Greenland. Neues Jahrb Miner Abh 94:121–139, Festband RamdohrGoogle Scholar
  9. Skinner B (1966) “Thermal expansion”. Handbook of Physical Constants, Geol Soc Am Mem 97: 77–96Google Scholar
  10. Steward EG, Rocksby HP (1953) Transitions in crystal structure of cryolite and related fluorides. Acta Crystallogr 6:49–52CrossRefGoogle Scholar
  11. Thomsen J (1862) Meddelelser angaaende Kryolithindustrien. Oversigt over det Kgl. danske Vidensk. Selskabs Forhandlinger Aaret 1862 af G. Forchhammer. Nr. 1 og 2, Januar og Februar, pp 1–10Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1982

Authors and Affiliations

  • H. Pauly
    • 1
  1. 1.Mineralogical InstituteTechnical University of DenmarkLyngbyDenmark

Personalised recommendations