Chinese Journal of Geochemistry

, Volume 13, Issue 1, pp 24–38 | Cite as

Microgranitoid enclaves in some I- and S-type granites from southern China

  • Zhou Jincheng 
  • Xu Xisheng 
  • Tao Xiancong


The three I-type plutons of Guantian (GT), Guidong (GD), Shangbao (SB) and the two S-type plutons of Xucun (XC) and Xiuning (XN) as well as their microgranitoid enclaves in southern China have been studied. Restite in the Motianling (MT) metasomatic granite in this area is described in this paper as well. Microgranitoid enclaves in the I-type granitoids may be divided into autoliths and schlierens which have marked differences both in petrography and geochemistry. In the S-type granitoids, schlierens are the major microgranitoid enclaves, but autoliths are rare. The metasomatic granite contains only restite without other enclaves. The microgranitoid enclaves and their host rocks have close εNd (T) values and the same minerals within them are similar in composition. The microgranitoid enclaves, in general, don’t represent the products of mixing of the syn-plutonic foreign mafic magma and the host acidic magma. They are the records of the evolution of intermediate-acidic magma itself. The formation of autoliths is related to the interdiffusion of different constituents in magma. Schlierens are the products of immiscible fractionation of the magma.

Key words

microgranitoid enclave granite autolith schlieren southern China 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bacon, C. R., 1986, Magmatic inclusions in silicic and intermediate volcanic rocks: Journal of Geophysical Research, v. 91, p. 6091–6122.CrossRefGoogle Scholar
  2. Bateman, P. C., L. D. Clark, N. K. Huber, J. G. Moore, and C. D. Rinehort, 1963, The Sierra Nevada batholith—a synthesis of recent work across the Central Part: United States Geological Survey Professional Paper, 414-D, p. 1–46.Google Scholar
  3. Cantagrel, J. M., J. Didier, and A. Gourgaud, 1984, Magma mixing: origin of intermediate rocks and “enclaves” from volcanism to plutonism: Physics of the Earth and Planetary Interiors, v. 35, p. 63–76.CrossRefGoogle Scholar
  4. Chappel, B. W., A. J.R. White, and D. Wyborn, 1987, The importance of residual source material (restite) in granite petrogenesis: Journal of Petrology, v. 28, p. 1111–1138.Google Scholar
  5. Chen, Y. D., R. C. Price, and A. J. R. White, 1989, Inclusions in three S-type granites from southeastern Australia: Journal of Petrology, v. 30, p. 1181–1218.Google Scholar
  6. Didier, J., 1982, The problem of enclaves in granitic rocks, a review of recent ideas on their origin, in Geology of Granites and Their Metallogenic Relations: The Proceedings of International Symposium, Nanjing, China, p. 137 – 144.Google Scholar
  7. Eberz, G. W., I. A. Nicholls, R. Mass, M. T. McCulloch, and D. J. Whitford, 1990, The Nd and Sr isotopic composition of I-type microgranitoid enclaves and their host rocks from the Swifts Creek pluton, Southeast Australia: Chemical Geology, v. 85, p. 119–134.CrossRefGoogle Scholar
  8. Eichelberger, J. C., 1978, Andesitic volcanism and crustal evolution: Nature, v. 275, p. 21–27.CrossRefGoogle Scholar
  9. Eichelberger, J. C., 1980, Vesiculation of mafic magma during replenishment of silicic magma reservoirs: Nature, v. 288, p. 446–450.CrossRefGoogle Scholar
  10. Furman, T. and F. J. Spera, 1985, Co-mingling of acid and basic magmas with implication for the origin of mafic I-type xenoliths: field and petrochemical relations of an unusual dike complex at Eagle Lake, Sequoia National Park, California, USA: Journal of Volcanology Geothermal Research, v. 24, p. 151–178.CrossRefGoogle Scholar
  11. Hess, P. C., 1977, Structure of silicate melt: Canadian Mineralogist, v. 15, p. 162–178.Google Scholar
  12. Holden, P., A. N. Halliday, and W. E. Stephens, 1987, Neodynium and strontium isotope content of microdiorite enclaves points to mantle input to granitoid production: Nature, v. 330, p. 53–56.CrossRefGoogle Scholar
  13. Institute of Geochemistry, Academia Sinica, 1979, Geochemistry of Granitoids in South China: Beijing, Science Press (in Chinese).Google Scholar
  14. Kistler, R. W., B. W. Chappell, and D. L. Peck, 1986, Isotopic variations in the Tuolumne intrusive Suite, Central Sierra Nevada, California: Contributions to Mineralogy and Petrology, v. 94, p. 205–220.CrossRefGoogle Scholar
  15. Li Xianhua, 1991, Geochronology of Wanyanshan-Zhuguangshan granitoid batholith: implication for the crust development: Science in China, v. 34, p. 620–629.Google Scholar
  16. Miller, C. F., 1985, Are strongly peraluminous magmas derived from pelitic sedimentary source? Journal of Geology, v. 93, p. 673–689.CrossRefGoogle Scholar
  17. Mysen, B. O., D. Virgo, and F. A. Seifert, 1982, The structure of silicate melt, implication for chemical and physical properties of natural magmas: Reviews of Geophysics and Space Physics, v. 20, p. 353–383.CrossRefGoogle Scholar
  18. Phillips, G. N., V. J. Wall, and J. D. Clemens, 1981, Petrology of the Strathbogie batholith: a cordierite-bearing granite: Canadian Mineralogist, v. 19, p. 47–64.Google Scholar
  19. Pin, C., J. L. Duthou, and J. D. Clemens, 1988, Origin of microgranular enclaves in granitoids: equivocal Sr-Nd isotopic evidence: EOS. Transactions, American Geophysical Union, v. 44, p. 1505. (abstract)Google Scholar
  20. Poli, G. E. and S. Tommasini, 1991, Model for the origin and significance of microgranular enclaves in calc alkaline granitoids: Journal of Petrology, v. 32, p. 657–666.Google Scholar
  21. Presnall, D. C. and P. C. Bateman, 1973, Fusion relations in the system NaAlSi3O8-CaAl2Si2O8-KAlSi3O8-SiO2 H2O and generation of granitic magmas in the Sierra Navada batholith: Bulletin of the Geological Society of American, v. 84, p. 3181–3201.CrossRefGoogle Scholar
  22. Reid, J. B. Jr., O. C. Evans, and D.G. Fates, 1983, Magma mixing in granitic rocks of the Central Sierra Nevada, California: Earth and Planetary Science Letters, v. 66, p. 243–261.CrossRefGoogle Scholar
  23. Sparks, R. S. J., H. Sigurdson, and L. Wilson, 1977, Magma mixing: a mechanism for triggering acid explosive eruptions: Nature, v. 267, p. 315–318.CrossRefGoogle Scholar
  24. Stout, J. H., 1972, Phase petrology and mineral chemistry of coexisting amphiboles from Telemark, Norway: Journal of Petrology, v. 13, p. 99–145.Google Scholar
  25. The Granitoid Research Group under the Nanling Project, MGMR, 1989, Geology of granitoids of the Nanling region and their petrogenesis and mineralization: Geological Memoris, Ministry of Geology and Mineral Resources, PRC, Series 3, No. 10, Beijing, Geological Publishing House (in Chinese with English abstract).Google Scholar
  26. Vernon, R. H., 1984, Microgranitoid enclaves in granites—globules of hybid magma quenched in a plutonic environment: Nature, v. 309, p. 438–439.CrossRefGoogle Scholar
  27. Walker, D. and S. E. Delong, 1982, Soret separation of Mid-Ocean Ridge basalt magma: Contributions to Mineralogy and Petrology, v. 79, p. 231–240.CrossRefGoogle Scholar
  28. Wang Yinxi, Yang Jiedong, Tao Xiancong and Li Huimin, 1988, A study of the Sm-Nd method for fossil mineral rocks and its application: Journal of Nanjing University (Natural Science Edition), v. 24, p. 297–308 (in Chinese with English abstract).Google Scholar
  29. White, A. J. R. and B. W. Chappell, 1977, Ultrametamorphism and granitoid genesis: Tectonophysics: v. 43, p. 7–22.CrossRefGoogle Scholar
  30. Zhou Jincheng and Xu Xisheng, 1992, Microgranitoid enclaves and related diffusion and liquid immiscibility of magmas: Geological Review, v. 38, p. 197–209 (in Chinese with English abstract).Google Scholar
  31. Zhou Xinmin and Wang Dezi, 1988, The peraluminous granodiorites with low initial87Sr/86Sr ratio and their genesis in southern Anhui Province, eastern China: Acta Petrologica Sinica, n. 3, p. 37–45 (in Chinese with English abstract).Google Scholar

Copyright information

© Institute of Geochemistry, Chinese Academy of Sciences 1994

Authors and Affiliations

  • Zhou Jincheng 
    • 1
  • Xu Xisheng 
    • 1
  • Tao Xiancong
    • 2
  1. 1.Department of Earth SciencesNanjing UniversityNanjing
  2. 2.Modern Analytical CentreNanjing UniversityNanjing

Personalised recommendations