碱性花岗岩中稀土矿物微观地质异常及其意义

孟大维; 龚俊锋; 于梅花

Volume 26 Issue 5

Sep. 2001

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Article Navigation > Earth Science > 2001 > 26(5): 496-500

Meng Dawei, Gong Junfeng, Yu Meihua, 2001. MICROSCOPIC GEOLOGICAL ABNORMALITY AND ITS SIGNIFICANCE OF RARE EARTH MINERALS IN ALKALI GRANITE. Earth Science, 26(5): 496-500.

Citation:

Meng Dawei, Gong Junfeng, Yu Meihua, 2001. MICROSCOPIC GEOLOGICAL ABNORMALITY AND ITS SIGNIFICANCE OF RARE EARTH MINERALS IN ALKALI GRANITE. Earth Science, 26(5): 496-500.

Meng Dawei, Gong Junfeng, Yu Meihua, 2001. MICROSCOPIC GEOLOGICAL ABNORMALITY AND ITS SIGNIFICANCE OF RARE EARTH MINERALS IN ALKALI GRANITE. Earth Science, 26(5): 496-500.

Citation:

Meng Dawei, Gong Junfeng, Yu Meihua, 2001. MICROSCOPIC GEOLOGICAL ABNORMALITY AND ITS SIGNIFICANCE OF RARE EARTH MINERALS IN ALKALI GRANITE. Earth Science, 26(5): 496-500.

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MICROSCOPIC GEOLOGICAL ABNORMALITY AND ITS SIGNIFICANCE OF RARE EARTH MINERALS IN ALKALI GRANITE

1.
Department of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
2.
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang 110015, China

Received Date: 2000-11-30
Publish Date: 2001-09-25

Abstract

Abstract

The rare-earth minerals within aegirine alkali granite from Mianning, Sichuan Province are mainly the calcium-rare-earth fluorocarbonate series. In this paper, the complicated, various geological abnormality is discovered by means of the selected area electron diffraction (SAED) and high resolution transmission electron microscopy (HRTEM) : (1) the regular mixed-layer structure B_mS_n formed by the ordered stacking of the unit layers in bastnaesite (B) and synchysite (S) of this series in different scales along c direction; (2) the ordered-disordered domain structures formed by the disordered stacking; (3) the disordered mixed-layer structure formed by the stacking faults, the syntactic intergrowth and phase transition among different polytypes in parisite; (4) the translation domains parallel to the direction in bastnaesite and the one-dimensional immensurate modulated structures which are probably disordered structures formed by the change of the ordered degree of atom occupations.
- rare-earth mineral,
- mixed-layer,
- polytype,
- modulated structure,
- HRTEM

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References(11)

References

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