TUỔI ĐẲNG THỜI Sm/Nd ĐÁ SIÊU MAFIC TRONG ĐỚI XIẾT TRƯỢT SÔNG HỒNG VÀ Ý NGHĨ ĐỊA ĐỘNG LỰC

Authors

  • Nguyễn Văn Vượng
  • BENT HANSEN
  • KLAUS WEMMER
  • Tạ Trọng Thắng
  • Mai Hồng Chương

DOI:

https://doi.org/10.15625/0866-7187/27/2/9399

Abstract

The Con Voi range is the southeastward continuity of the tertiary Red River Ailao Shan shear zone. The range consists of high-grade metamorphic and strongly deformed rocks with amphibolitic lenses, ultramafic-mafic bodies intercalated inside the shear zone. The whole range was sheared and metamorphosed during it's sinitral displacement. However, Sm/Nd isochron dating one ultramafic body captured within the shear zone yields a protolith age of 490 My, with initialratio of 143Ndf1 44Nd = 0.511742 and t:!;{J(1 = -5.19,t:(/" = -8.32. This result suggests a long and multiphasal tectonics of the Red River-Ailao Shan shear zone. On the other hand, it shows thecapacity of "seeing through" the thermotectonic events overprinted upon the older structures of theSm/Nd isochron dating method.

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Published

27-03-2017

How to Cite

Vượng, N. V., HANSEN, B., WEMMER, K., Thắng, T. T., & Chương, M. H. (2017). TUỔI ĐẲNG THỜI Sm/Nd ĐÁ SIÊU MAFIC TRONG ĐỚI XIẾT TRƯỢT SÔNG HỒNG VÀ Ý NGHĨ ĐỊA ĐỘNG LỰC. Science of the Earth, 27(2), 97–102. https://doi.org/10.15625/0866-7187/27/2/9399

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