Some study results of Cam Ranh - Binh Thuan mud eruption strip

Bui Van Thom*, Phan Trong Trinh, Ngo Tuan Tu, Nguyen Anh Duong, Nguyen Dang Manh
Author affiliations

Authors

  • Bui Van Thom* Institute of Geological Sciences, Vietnam Academy Science and Technology
  • Phan Trong Trinh Institute of Geological Sciences, Vietnam Academy Science and Technology
  • Ngo Tuan Tu Division of planning and investigation of water resources in central region
  • Nguyen Anh Duong Institute of Geological Sciences, Vietnam Academy Science and Technology
  • Nguyen Dang Manh Institute of Geological Sciences, Vietnam Academy Science and Technology

DOI:

https://doi.org/10.15625/0866-7187/38/3/8711

Keywords:

Mud eruption, bentonite clay, tectonic fault zone, Ninh Thuan mud eruption

Abstract

Most of the mud eruption locations are distributed in a stretching strip, running in NE-SW direction from Cam Ranh - Ninh Thuan - Binh Thuan NE-SW tectonic fault zone and coinciding with a tectonically crushed zone. The erupted mud consists of sand, mud, clay. The clay contains alkaline montmorillonite, formed following chemical weathering and re-sedimentation processes from rocks containing alkaline minerals in a semi-arid climate area, located in a low terrain or a tectonic subsiding zone with a large fluctuation in groundwater level. The mud eruption  has a close relation to factors (of) climate, topography, geomorphology, hydrogeology, petrography and tectonic activities in the area. Among these, tectonic factors are the most important for they create not only soil and rock crushed zone, paving favorable conditions for strong weathering process at depth, but also to form canals to bring hot groundwater and minerals from certain depths upward, and by the effects of pressurized groundwater and partly due to the expansion in volume of bentonite clay pushing the muddy clay material through the tectonic cracks to the surface of the current terrain. The mud eruption process is not deep; but it may occur from a shallow level, about 4-18 m below, under the impact of the above elements.

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Published

20-09-2016

How to Cite

Thom*, B. V., Trinh, P. T., Tu, N. T., Duong, N. A., & Manh, N. D. (2016). Some study results of Cam Ranh - Binh Thuan mud eruption strip. Vietnam Journal of Earth Sciences, 38(3), 256–276. https://doi.org/10.15625/0866-7187/38/3/8711

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