Vietnam Academy of Science and Technology

Project's information

Project's title	Study the lithological and geochemical characteristics of basalt in Con Co Island and adjacent to understand the relationship between the mantle geodynamic regime and the related lithosphere
Project’s code	ĐLTE00.09/22-23
Research hosting institution	Institute of Marine Geology and Geophysics
Project leader’s name	Dr. Le Duc Anh
Project duration	01/01/2022 - 31/12/2023
Project’s budget	600 million VND
Classify	Grade B
Goal and objectives of the project	- Determine the characteristics of the magma source and the physico-chemical conditions form basalt of Con Co island and neighboring . - Determine the relationship between mantle dynamics and the regional geodynamic in the late Cenozoic period.
Main results	- Theoretical results: + The research results of the project have determined the geological development history of the late Cenozoic period in the area of Con Co island and neighboring areas divided into 3 periods (3 phases). + Con Co volcanic island was formed by two stages, each basalt stage has different characteristics in petrographic and geochemical composition. These characteristics reflect instability in the mantle of the study area over time and space. + Mantle dynamics and geodynamics of the Earth's crust are two main causes, they occur at the same time, changing the geological structure of the study area throughout the Cenozoic. - Applied results: The research results are the scientific basis for the formation of Con Co island.
Novelty and actuality and scientific meaningfulness of the results	Unlike some previous observations, volcanic activity in the North Central region is caused by tectonic faults. The research results of the project have proven that mantle dynamics is the main cause of volcanic eruptions on Con Co island and neighboring areas.
Products of the project	- Scientific papers in referred journals (list): + 01 article published in the Russian journal of Pacific Geology (SCIe) including 2 versions in English and Russian. + 01 article published in the Vietnam Journal of Marine Science and Technology (VAST2) - Technological products (describe in details: technical characteristics, place): 1. Results of the prroject survey 2. Results of absolute age analysis of basalt samples using the K-Ar method (04 sample) 3. Results of petrographic composition analysis under polarizing microscope of basalt samples (30 samples) 4. Results of analyzing major elements of basalts (30 samples) 5. Results of analyzing trace elements of basalts (15 samples) 6. Results analysis of temperature and pressure of basalt formation 7. Map of geodynamic structure of the study area at scale 1:200,000 8. Geological structure map of Con Co island at scale 1:10,000 9. Model of the interaction between the mantle and the lithosphere and the mechanism of volcano generation in the study area.
Research region	- Department of Science and Technology of Quang Tri Province, Vietnam - Department of Natural Resources and Environment of Quang Tri province
Recommendations	Expand investigation and research on the formation of volcanic islands on the Vietnamese continental shelf and evaluate their potential position.
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