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Year 2022
 
Vol 63, Issue 4, [08 - 2022]

Characteristics of the surface sediments surounding Ly Son island and related mineral potentials

DOI:10.46326/JMES.2022.63(4).06

  • Affiliations:

    1 Hanoi University of Mining and Geology, Hanoi, Vietnam
    2 Northern Center for Planing and Investigation of Marine Resources - Environment, Hanoi, Vietnam

  • *Corresponding:
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  • Received: 28th-Feb-2022
  • Revised: 30th-June-2022
  • Accepted: 3rd-Aug-2022
  • Online: 31st-Aug-2022
Pages: 61 - 71
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Abstract:

The marine area surrounding Ly Son island, of Quang Ngai province demonstrates steep and complex sea - floor morphology due to the presence of submarine coral reefs developed above the Ly Son paleo - volcano. The data of grain - size and mineral compositon analysis show that surface sediments of the Ly Son island are subdivided into 09 different sediment groups: muddy sandy gravel, sand, gravelly sand, gravel mixed sand and gravelly muddy sand, gravelly mud mixed sand, muddy sand, silty sand, gravelly mud, whose major composition is dominated by quartz (15.0÷71.0%), shelf fragments (27.0÷81.0%), minor lithic fragments and feldspar. This indicates that surface sediments can come from multi - origins in this studied area. The distribution of those sedimentary groups is relatively complex. The northern region mainly contains coarser grained sediments (i.e., sanddy gravel, sand, etc.), while the southern region hightly apears finer grained sediments (i.e., mud and silt). The coarser grained sediments such as muddy sandy gravel and gravelly sand, which are mainly coral fragment and often concentrated in the steep terrain around the emerged islands, while finer grained sediments more like sand, silty sand, etc. mostly deposited inside the submarine incised channels and slopes. The data from heavy mineral analysis show that the main valuable placer are ilmenite, zircon, etc. but their grades are very low and hence little economic prospect (ilmenite accounts for 23.57÷23.83 g/m3; zircon accounts for 0.33÷4.53 g/m3); Minerals used as construction materials are concentrated mainly in coarse - grained sedimentary fields (sand, gravelly sand and gravel mixed sand) with economic potential to serve construction needs on Ly Son island.

How to Cite
Phan, B.Van, Trinh, T.Nguyen, Le, T.Anh, Tran, H.Thanh, Ngo, C.Kim Thi, Nguyen, H.Huu and Bui, H.Thu 2022. Characteristics of the surface sediments surounding Ly Son island and related mineral potentials (in Vietnamese). Journal of Mining and Earth Sciences. 63, 4 (Aug, 2022), 61-71. DOI:https://doi.org/10.46326/JMES.2022.63(4).06.
References

Do, T.C., Trinh, N.T. (2015). Investigate geomorphology, geology, and minerals on some large and important islands and island clusters, at a scale of 1:50,000, under the Component 2 project. Northern Center for Planning and Investigation of Marine resources - Environment. (in Vietnamese)

Folk, R.L. (1974). Petrology of Sedimentary Rocks. Austin, Texas: Hemphill Press, 182 pp.

Hoang, V.L., Phan, V.B., Nguyen, H.H. (2015). Report on the establishment of the surface sediment map of the Ly Son island under the Project “Basic investigation of resources and environment of some large islands and island clusters, important for the planning of marine economic development, and the protection of territorial sea sovereignty”. Northern Center for Planning and Investigation of Marine resources - Environment. (in Vietnamese)

Nguyen, B. (2009). Report on the investigation of geological characteristics, geodynamics, mineral geology, environmental geology, and geological hazard prediction in Vietnam's seas at a scale of 1:500,000. Northern Center for Planning and Investigation of Marine resources - Environment. (in Vietnamese)

Nguyen, V.T. (1986). Report on Geological mapping and Mineral deposits at 1:200,000 scale of the Hue - Quang Ngai sheet groups. Northern Center for Planning and Investigation of Marine resources - Environment. (in Vietnamese)

Phan, V.B., Hoang, V.L., Trinh, N.T., Do, T.C. (2020). Characteristics of surface sediments in Ly Son island. In The Conference of Earth sciences and Natural resources for Sustainable Development (ERSD 2020), Hanoi University of Mining and Geology, pp. 14-20. (in Vietnamese)

Trinh, N.T., Dao, M.T. (2012). Report on the investigation of geological characteristics, geodynamics, mineral geology, environmental geology, and geological hazard prediction in Vietnam's seas. Northern Center for Planning and Investigation of Marine resources - Environment. (in Vietnamese)

Wentworth, C.K. (1922). A scale of grade and class terms for clastic sediments. The journal of geology, Vol. 30, No. 5, pp. 377-392.