Mineralogical and geological characteristics of the Nui Phao tungsten deposit and its resource in the Dai Tu area, northeastern Vietnam

  • Affiliations:

    1 Hanoi University of Mining and Geology, Hanoi, Vietnam
    2 Masan High-Tech Materials, Thai Nguyen, Vietnam
    3 Vinacomin - Vietbac Geology Joint Stock Company, Hanoi, Vietnam

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 7th-July-2022
  • Revised: 20th-Oct-2022
  • Accepted: 15th-Nov-2022
  • Online: 31st-Dec-2022
Pages: 1 - 11
Views: 284
Downloads: 11
Rating: 4.3, Total rating: 4
Yours rating

Abstract:

Typically, granitic intrusions that document the lengthy and intricate history of the magmatic-hydrothermal system are linked to tungsten deposits. Uncertainty persists about the genetic relationship between tungsten mineralization and magmatic-hydrothermal development. The primary tungsten deposit in the Dai Tu region, known as the Nui Phao deposit, has been the subject of a petrographical and microscopic examination. Tungsten mineralization in the Dai Tu area often occurs in association with the formation of skarn and greisen bodies, and it has drawn much attention from geoscientists. Based on microscopic observations, tungsten ores can be divided into three mineralization stages, namely skarnisation, greisenization, and hydrothermal stage. To examine the geochemical features of the tungsten ores, the SEM-EDS and Microscope analytical methods were performed in this study. Research results indicate that the Nui Phao tungsten deposit was formed due to different tectonic and magmatism episodes. Accordingly, the Nui Phao tungsten deposit is relatively complicated with the multi-sources of ore components. Most of the tungsten ore was accumulated in association with the metasomatism between the Ordovician-Silurian carbonate-terrigenous sedimentary rocks of the Phu Ngu formation and the Cretaceous two-mica granite of the Pia Oac complex. The research results indicate that tungsten resources obtained at levels 122 and 333 are about 227.6 thousand tons. Moreover, the hydrothermal alteration and metasomatism in the study area are influenced by at least three metasomatic episodes, including skarnisation, greisenisation, and the late hydrothermal alteration of medium to a low temperature that is genetically related to fluorite-polymetallic mineralization.

How to Cite
Luong, K.Quang, Khuong, H.The, Vo, D.Tien and Nguyen, T.Danh 2022. Mineralogical and geological characteristics of the Nui Phao tungsten deposit and its resource in the Dai Tu area, northeastern Vietnam. Journal of Mining and Earth Sciences. 63, 6 (Dec, 2022), 1-11. DOI:https://doi.org/10.46326/JMES.2022.63(6).01.
References

Dovjikov, A. E. (ed.) (1965). Geology of North Vietnam. Explanatory note of the Geological Map of North Vietnam at 1:500,000 scale. Geological Department of Vietnam, Ha Noi, 584 pp.

Dudka, S. (ed.). (2003). Report on the exploration results of W, Sn, Bi ores in Nui Phao mine. General Department of Geology and Minerals of Vietnam.

Kazdan, A.B. (1997). Prospecting and exploration of mineral deposits. Nedra Publishers, Moscow. (in Russian).

Khuong, T. H., Luong, Q. K., Pham, N. S., and Hoang, V. V. (2020). Establishing a Tungsten Deposit Group and a Pattern Grid Exploration in the Nui Phao Area, Northeastern Vietnam. Proceedings of the International Conference on Innovations for Sustainable and Responsible Mining, 2, 58-78.

Nguyen,D. L., Vo, T. D., Do, V. N., and Nguyen, H. T. (2016). Characteristics of metasomatic rocks in the Nui Phao polymetal deposit occurring in Dai Tu district, Thai Nguyen province. Journal of Mining and Earth Sciences, 53, 45-52. (in Vietnamese)

Ngo, D. K.(ed.). (1991). Report on the results of prospective assessment of W, Sn, Bi and associated minerals in Dai Tu district, Bac Thai province. General Department of Geology and Minerals of Vietnam. (in Vietnamese).

Phan, L. A. (2003). The petrologic genesis of high aluminum granitoid Pia Oac massive based on petrologic and geochemical isotope analysis. Journal of Geosciences, 25(2), 134-141. (in Vietnamese).

Tran, T. H., Farmar, M., and Stemler, J. (2003). The structural controls on mineralization at the Nui Phao polymetallic (W-F-Cu-Au-Bi) deposit, Northern Vietnam. Geological Association of Canada/Mineralogical Association of Canada Annual Meeting, Abstracts, 28, p. 64.

Pogrebiski, E.O. (1973). Prospecting and exploration of mineral deposits. Nedra Publishers, Moscow. (in Russian).

Vo, T.D. (2017). Geochemical and Mineralogical characteristics of W-Pb-Zn mineralization in the Nui Phao mine, Dai Tu, Thai Nguyen. PhD Thesis, Hanoi University of Mining and Geology, Hanoi, 113 pp. (in Vietnamese).