Skip to main content
SpringerLink
Log in

Sub-microscopic textures and retrogressive metamorphic origin of Longxi nephrite

  • Published:
Chinese Journal of Geochemistry Aims and scope Submit manuscript

Abstract

Nephrite specimens from Longxi, Sichuan, prepared by ion-thinning and dispersion techniques have been studied using TEM and SAED. A series of sub-microscopic textures such as (010) multiple-chain faults and related fault terminations, (001) mechanical twinning, sub-grain boundaries or fault walls, tremolite fibrous pseudoform of talc and intergrowth of tremolite and talc with (010) as interface are revealed. By analogy of metallographic textures, characteristics and mechanisms of the process of “deformation — recovery — recrystallization” are discussed in detail, Topotactic reaction mechanism by which tremolite retrogresses to talc was studied and a retrogressive metamorphic origin of Longxi nephrite is proposed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Bradt, R.C., Newnham, R.E. and Biggers, J.V. (1973) The toughness of jade,Am. Mineral. 58, 727 - 732.

    Google Scholar 

  • Wang Chunyun (1988) Mineralogical study of Longxi Nephrite. M.S. thesis. Institute of Geochemistry, Academia Sinica (in Chinese).

  • Wang Chunyun, Ren Guohao, Xie Yuanzhang and Li Yaguo (1989) Topotactic reaction from tremolite to talc: Electron diffraction study of Longxi Nephrite.Acta Mineralogica Sinica (in press)(in Chinese).

  • Dorling, M. and Zussman, J. (1985) An investigation of nephrite by electron microscopy.Mineral. Mag. 49, 31 - 36.

    Article  Google Scholar 

  • Humphreys, F. J. (1979) Recrystallization mechanisms in two-phase alloys.Metal Science 13, 136 - 145.

    Google Scholar 

  • Knopf, E.B. (1931) Retrogressive metamorphism and phyllonitization, part I.Am. J. Sci. 21, 319–331.

    Google Scholar 

  • Leaming, S.F. (1978) Jade in Canada. Paper Geol. Sury. Canada, 78–19.

  • Mallinson, L.G. Jefferson, D.A., Hutchison, J.L. and Thomas, J.M. (1980). The internal structure of nephrite: experimental and computational evidence for the existence of multiple-chain silicates within an amphibole host.Phil. Trans. Royal. Soc. London 295, 537–552.

    Article  Google Scholar 

  • Rowcliffe, D.J., and Fruhauf, V. (1977) The fracture of jade.J. Mater. Sci. 12, 35–42.

    Article  Google Scholar 

  • Schwartz, G. M. and Todd, J.H., (1941) Comments on retrograde metamorphism.J. Geol., vol. XIIX, 177–189.

    Article  Google Scholar 

  • Vernon, R. H. (1976) Metamorphic Processes, Reaction and Microstructure Development. Allen and Unwin, Ltd., London.

    Google Scholar 

  • Whinkler, H.G.F. (1967) Petrogenesis of Metamorphic Rocks, 2nd ed., Springer-Verlag Berlin Heidelberg New York.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Geochemistry, Academia Sinica, China

    Wang Chunyun & Zhang Huifen

  2. Wuhan University of Technology, China

    Ren Guohao

Authors
  1. Wang Chunyun
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Zhang Huifen
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Ren Guohao
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Chunyun, W., Huifen, Z. & Guohao, R. Sub-microscopic textures and retrogressive metamorphic origin of Longxi nephrite. Chin. J. of Geochem. 9, 182–187 (1990). https://doi.org/10.1007/BF02838071

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02838071

Keywords

Search

Navigation