Estimation of Curie point depths in the Southern Vietnam continental shelf using magnetic data

Pham Thanh Luan; Do Duc Thanh; Erdinc Oksum; Le Thi Sang

doi:10.15625/0866-7187/41/3/13830

Author affiliations

Authors

Pham Thanh Luan VNU University of Science, Faculty of Physics, Department of Geophysics, Hanoi, Vietnam
Do Duc Thanh VNU University of Science, Faculty of Physics, Department of Geophysics, Hanoi, Vietnam
Erdinc Oksum Süleyman Demirel University, Engineering Faculty, Department of Geophysical Engineering, Isparta, Turkey
Le Thi Sang VNU University of Science, Faculty of Physics, Department of Geophysics, Hanoi, Vietnam

DOI:

https://doi.org/10.15625/0866-7187/41/3/13830

Keywords:

Curie point depth, heat flow, exponential approach, magnetic data, Southern Vietnam continental shelf

Abstract

This study attempts to estimate the thermal structure in the Southern Vietnam continental shelf by calculating the Curie point depth isotherm using magnetic data. The Curie point depth values, from 49 overlapping blocks 128 × 128 km in size, have been estimated by the exponential approach. This approach is based on the analytical solution of the exponential equations obtained from transforming the magnetic anomaly data into the frequency domain. According to the obtained results, the range of Curie point depths is from 15.3 to 35.6 km. In the study area, the greatest Curie point depth is located in the South-Eastern part, and the smallest depth is located at North-Western part. The heat flows derived from the Curie point depths are also presented. The obtained results are at relatively high resolutions and in agreement with the published information available for the study area. The Curie point depths generally lie below the Moho surface in this region but lie above in some locations, notably the Cuu Long basin.

Downloads

Download data is not yet available.

References

Aydın I., Oksum E., 2010. Exponential approach to estimate the Curie-temperature depth. Journal of Geophysics and Engineering, 7, 113–125.

Aydın I., Oksum E., 2012. Matlab code for estimating magnetic basement depth using prisms. Computers and Geoscience, 46, 183–188.

Bansal A., Gabriel G., Dimri V., Krawczyk C., 2011. Estimation of depth to the bottom of magnetic sources by a modified centroid method for fractal distribution of sources: An application to aeromagnetic data in Germany. Geophysics, 76(3), L11–L22.

Bansal A., Anand S., Rajaram M., Rao V., Dimri V., 2013. Depth to the bottom of magnetic sources (DBMS) from aeromagnetic data of Central India using modified centroid method for fractal distribution of sources. Tectonophysics, 603, 155–161.

Bhattacharyya B.K., Leu L.K., 1975. Analysis of magnetic anomalies over Yellowstone National Park: mapping of Curie point isothermal surface for geothermal reconnaissance. J. Geophys. Res., 80, 4461–4465.

Bhattacharyya B.K., Leu L.K., 1977 Spectral analysis of gravity and magnetic anomalies due to rectangular prismatic bodies Geophysics, 42, 41–50.

Binh N.T.T., Tokunaga T., Goulty N.R., Son H.P., Van Binh M., 2011. Stress state in the Cuu Long and Nam Con Son basins, offshore Vietnam. Marine and Petroleum Geology, 28(5), 973–979.

Blackwell D.D., 1983. Heat flow in the northern basin and range province. Geotherm. Resour. Counc. Spec. Rep., 13, 81–93.

Blakely R.J., 1996. Potential Theory in Gravity and Magnetic Applications. Cambridge University Press, pp.300–305.

Chiozzi P., Matsushima J., Okubo Y., Pasquale V., Verdoya M., 2005. Curie-point depth from spectral analysis of magnetic data in central–southern Europe, Phys. Earth planet. Inter., 152, 267–276.

Counil J.L., Achache J., Galdeano A., 1989. Long-wavelength magnetic anomalies in the Caribbean: Plate boundaries and allochthonous continental blocks. Journal of Geophysical Research, 94, 7419–7431.

Correa R.T., Vidotti R.M., Oksum E., 2016. Curie surface of Borborema Province, Brazil. Tectonophysics, 679, 73–87.

De Ritis R., Ravat D., Ventura G., Chiappini M., 2013. Curie isotherm depth from aeromagnetic data constraining shallow heat source depths in the central Aeolian Ridge (Southern Tyrrhenian Sea, Italy). Bulletin of Volcanology, 75(4). Doi: 10.1007/s00445-013-0710-9.

Dolmaz M.N., Hisarli Z.M., Ustaomer T., Orbay N., 2005a. Curie point depths based on spectrum analysis of the aeromagnetic data, west Anatolian extensional province, Turkey. Pure Appl. Geophys., 162, 571–590.

Dolmaz M.N., Ustaomer T., Hisarli Z.M., Orbay N., 2005b. Curie Point Depth variations to infer thermal structure of the crust at the African-Eurasian convergence zone, SW Turkey. Earth Planets Space, 57, 373–383.

Friedman S.A., Feinberg J.M., Ferré E.C., Demory F., Martín-Hernández F., Conder J. A., Rochette P., 2014. Craton vs. rift uppermost mantle contributions to magnetic anomalies in the United States interior. Tectonophysics, 624, 15–23.

Ferré E.C., Friedman S.A., Martín-Hernández F., Feinberg J.M., Conder J.A., Ionov D.A., 2013. The magnetism of mantle xenoliths and potential implications for sub-Moho magnetic sources. Geophysical Research Letters, 40(1), 105–110.

Finn C.A., Ravat D., 2004. Magnetic depth estimates and their potential for constraining crustal composition and heat flow in Antarctica. EOS Transactions American Geophysical Union, Fall Meeting Abstracts, 1 December 2004.

Fowler C.M.R., 2005. The Solid Earth: An Introduction to Global Geophysics. Cambridge Univ. Press, 685p.

Frost B.R., Shive P.N., 1986. Magnetic mineralogy of the lower continental crust. J. Geophys. Res., 91(6), 513–521.

Gwang H. Lee, Keumsuk Lee, Joel S., 2001. Geologic evolution of the Cuu Long and Nam Con Son basins, offshore southern Vietnam, South China Sea. AAPG Bulletin, 85(6),1055–1082.

Geological Survey of Japan (GSJ) and Coordinating Committee for Coastal and Offshore Geoscience Programmes in East and Southeast Asia (CCOP), 1996. Magnetic anomaly map of East Asia 1:4,000,000 CD-ROM Version.

Huchon P., Nguyen T. N., Chamot-Rooke N., 1998. Finite extension across the South Vietnam basins from 3D gravimetric modelling: relation to South China Sea kinematics. Marine and Petroleum Geology, 15(7), 619–634.

Li C.F., Wang J., 2016. Variations in Moho and Curie depths and heat flow in Eastern and Southeastern Asia. Marine Geophysical Research, 37(1), 1–20.

Maus S., Dimri V., 1996. Depth estimation from the scaling power spectrum of potential fields. Geophysical Journal International, 124(1), 113–120.

Nagata T., 1961. Rock Magnetism. Maruzen Company Ltd., Tokyo, 350p.

Okubo Y., Graf R.J., Hansen R.O., Ogawa K., Tsu H., 1985. Curie point depths of the island of Kyushu and surrounding areas, Japan. Geophysics, 50, 481–494.

Oldenburg D.W., 1974. The inversion and interpretation of gravity anomalies. Geophysics, 39(4), 526–536.

Rocha M.L.G., Pires A.C.B., Carmelo A.C., Oksum E., 2015. Curie surface of the alkaline provinces of Goiás (GAP) and Alto Paranaíba (APAP), central Brazil. Journal of Volcanology and Geothermal Research, 297, 28–38.

Saleh S., Salk M., Pamukcu O., 2013. Estimating Curie depth and heat flow map for northern Red Sea rift of Egypt and its surroundings, from aeromagnetic data. Pure Appl. Geophys., 170, 863–885.

Salem A., et al., 2014. Depth to Curie temperature across the central Red Sea from magnetic data using the de-fractal method. Tectonophysics, 624, 75–86.

Serson P.H., Hannoford W.L.W., 1957. A statistical analysis magnetic profiles. J. Geophys. Res., 62, 1–18.

Siler D.L., Kennedy B.M., 2016. Regional crustal-scale structures as conduits for deep geothermal upflow. Geothermics, 59, 27–37.

Smith R., Shuey R., Pelton J., Bailey J., 1977. Yellowstone hot spot: Contemporary tectonics and crustal properties from earthquake and aeromagnetic data. Journal of Geophysical Research, 82(26), 3665–3676.

Spector A., Grant F., 1970. Statistical models for interpreting aeromagnetic data. Geophysics, 35(2), 293–302.

Stampolidis A., Tsokas G.N., 2002. Curie point depths of Macedonia and Thrace, N. Greece. Pure appl. Geophys., 159, 2659–2671.

Starostenko V.I., et al., 2014. Thermal structure of the crust in the Black Sea: Comparative analysis of magnetic and heat flow data. Marine Geophysical Research, 35(4), 345–359.

Tanaka A., Okuba Y., Matsubayashi O., 1999. Curie point depth based on spectrum analysis of the magnetic anomaly data in East and Southeast Asia. Tectonophysics, 306, 461–470.

Teknik V., Ghods A., 2017. Depth of magnetic basement in Iran based on fractal spectral analysis of aeromagnetic data. Geophysical Journal International, 209(3), 1878–1891.

Trifonova P., Zhelev Z., Petrova T., Bojadgieva K., 2009. Curie point depths of Bulgarian territory inferred from geomagnetic observations and its correlation with regional thermal structure and seismicity. Tectonophysics, 473(3), 362–374.

Turcotte, D.L., Schubert, G., 2002. Geodynamics. Second ed. Cambridge Univ. Press, 456p.

Wang J., Li. C.F., 2018. Curie point depths in Northeast China and their geothermal implications for the Songliao Basin. Journal of Asian Earth Science, 163, 177–193.

Whelley P.L., Newhall C.G., Bradley K.E., 2015. The frequency of explosive volcanic eruptions in Southeast Asia. Bulletin of Volcanology, 77(1). Doi: 10.1007/s00445-014-0893-8