Determination of subsurface lineaments in the Hoang Sa islands using enhanced methods of gravity total horizontal gradient

Luan Pham Thanh; Erdinc  Oksum; Ozkan  Kafadar; Trinh Phan Trong; Dat Nguyen Viet; Quynh Vo Thanh; Sang Le Thi

doi:10.15625/2615-9783/17013

Author affiliations

Authors

Luan Thanh Pham University of Science, Vietnam National University, Hanoi, Vietnam
Erdinc Oksum Department of Geophysical Engineering, Engineering Faculty, Süleyman Demirel University, Isparta, Turkey
Ozkan Kafadar Department of Computer Technologies, Kocaeli University, Kocaeli, Turkey
Trinh Phan Trong 1-Institute of Geological Sciences, VAST, Hanoi, Vietnam; 2-Royal Academy for Overseas Sciences, Brussels, Belgium
Dat Viet Nguyen University of Science, Vietnam National University, Hanoi, Vietnam
Quynh Thanh Vo University of Science, Vietnam National University, Hanoi, Vietnam
Sang Thi Le University of Science, Vietnam National University, Hanoi, Vietnam

DOI:

https://doi.org/10.15625/2615-9783/17013

Keywords:

Gravity, enhanced total horizontal gradient methods, Hoang Sa islands

Abstract

The Hoang Sa islands, located in the northern part of the East Vietnam Sea, lack information on geological structural boundaries. The gravity data from the global marine gravity model were analyzed using the enhanced total horizontal gradient methods to delineate geological structures that appear as lineaments on the transformed gravity anomaly maps of the area. Before applying the techniques to gravity data of the Hoang Sa islands, their effectiveness was demonstrated by comparing them with the results from the total horizontal gradient method for a synthetic model. Applying the enhanced horizontal gradient methods shows that most of the lineaments identified in the Hoang Sa islands are trending in the WSW-ENE, NE-SW, E-W, WNW-ESE and NNW-SSE directions. These results provide a better understanding of the subsurface structural features of the islands.

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