Contemporary movement of the Earth's crust in the Northwestern Vietnam by continuous GPS data

Le Huy Minh, Vu Tuan Hung, Jyr- Ching Hu, Nguyen Le Minh, Bor- Shouh Huang, Horng- Yue Chen, Nguyen Chien Thang, Nguyen Ha Thanh, Le Truong Thanh, Nguyen Thi Mai, Pham Thi Thu Hong
Author affiliations

Authors

  • Le Huy Minh 1-Institute of Geophysics, Vietnam Academy of Science and Technology 2-Graduate University of Science and Technology, Vietnam Academy of Science and Technology
  • Vu Tuan Hung Institute of Geological Science, Vietnam Academy of Science and Technology
  • Jyr- Ching Hu National Taiwan University, Taiwan
  • Nguyen Le Minh 1-Institute of Geophysics, Vietnam Academy of Science and Technology 2-Graduate University of Science and Technology, Vietnam Academy of Science and Technology
  • Bor- Shouh Huang Institute of Earth Sciences, SINICA, Taiwan
  • Horng- Yue Chen Institute of Earth Sciences, SINICA, Taiwan
  • Nguyen Chien Thang Institute of Geophysics, Vietnam Academy of Science and Technology
  • Nguyen Ha Thanh Institute of Geophysics, Vietnam Academy of Science and Technology
  • Le Truong Thanh Institute of Geophysics, Vietnam Academy of Science and Technology
  • Nguyen Thi Mai Institute of Geophysics, Vietnam Academy of Science and Technology
  • Pham Thi Thu Hong 1-Institute of Geophysics, Vietnam Academy of Science and Technology 2-Graduate University of Science and Technology, Vietnam Academy of Science and Technology

DOI:

https://doi.org/10.15625/0866-7187/42/4/15282

Keywords:

Crustal movement, GPS continuous data, IGS14, northwestern Vietnam, GAMIT/GLOBK

Abstract

The paper presents an estimation of the Earth’s crustal motion from the continuous GPS data at 6 stations (MTEV, MLAY, DBIV, TGIV, SMAV and SLAV) in the Northwestern and at PHUT (Hanoi) station using GAMIT/GLOBK software. The absolute displacements of the Earth’s crust at 7 stations in the IGS14 frame are respectively: 34.10±0.71 mm/yr (DBIV), 34.31±0.65 mm/yr (PHUT), 34.51±0.75 mm/yr (SMAV), 34.55±0.80 mm/yr (MLAY), 34.80±0.72 mm/yr (TGIV), 34.93±0.99 mm/yr (SLAV) and 35.59±0.73 mm/yr (MTEV), in the southeastward with the azimuth range 104-108o.  The Son La fault is a right-lateral slip fault with a shear amplitude of ~1.5 mm/yr. The Lai Chau-Dien Bien fault is a left-lateral slip fault with a shear amplitude of ~1.9 mm/yr. Although the absolute velocities at the DBIV, SMAV, SLAV, TGIV and MLAY stations are evaluated with the error <1 mm/yr, the relative displacement on the Ma River fault is of ~0.5 mm/yr, and it seems that we still do not have a reliable assessment of the slip rate on the Ma River right-lateral slip fault.

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Published

14-09-2020

How to Cite

Minh, L. H., Hung, V. T., Hu, J.-. C., Minh, N. L., Huang, B.-. S., Chen, H.-. Y., Thang, N. C., Thanh, N. H., Thanh, L. T., Mai, N. T., & Hong, P. T. T. (2020). Contemporary movement of the Earth’s crust in the Northwestern Vietnam by continuous GPS data. Vietnam Journal of Earth Sciences, 42(4), 334–350. https://doi.org/10.15625/0866-7187/42/4/15282

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