Articles | Volume 17, issue 3
https://doi.org/10.5194/se-17-389-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-17-389-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Mar 2026
Research article |
| 04 Mar 2026
| 04 Mar 2026
Integrated geophysical analysis of Rangpur Saddle: insights on tectonics and magnetic mineral potential of north-western Bangladesh
Mohammad Tawhidur Rahman Tushar
CORRESPONDING AUTHOR
Department of Geology, University of Dhaka, Dhaka-1000, Bangladesh
Department of Earth Sciences, University of Oregon, Eugene, Oregon-97401, United States of America
Mohammad Mahfuz Alam
Department of Geology, University of Dhaka, Dhaka-1000, Bangladesh
Mohammad Nasif Jamil
Department of Geology, University of Dhaka, Dhaka-1000, Bangladesh
Saba Karim
Department of Geology, University of Dhaka, Dhaka-1000, Bangladesh
Mohammad Shahjahan
Geological survey of Bangladesh, 153 Pioneer Road, Dhaka-1000, Bangladesh
Mohammad Anwar Hossain Bhuiyan
Department of Geology, University of Dhaka, Dhaka-1000, Bangladesh
Cited articles
Adebiyi, L. S., Eluwole, A. B., Fajana, A. O., Salawu, N. B., and Saleh, A.: Contrasting structures of the Southern Benue trough and the contiguous crystalline basement as observed from high-resolution aeromagnetic data, Sci. Rep., 13, 21516, https://doi.org/10.1038/s41598-023-48639-8, 2023.
Ahamed, S., Hossain, D., and Alam, J.: Exploring Basement Surface relationship of north-west Bengal Basin using satellite images and tectonic modeling, arXiv [preprint], https://doi.org/10.48550/ARXIV.2004.02734, 2020.
Akhtar, A.: Mineral resources and their economic significance in national development: Bangladesh perspective, Geological Society, London, Special Publications, 250, 127–134, https://doi.org/10.1144/GSL.SP.2005.250.01.12, 2005.
Alam, M.: Geology and depositional history of Cenozoic sediments of the Bengal Basin of Bangladesh, Palaeogeogr. Palaeocl., 69, 125–139, https://doi.org/10.1016/0031-0182(89)90159-4, 1989.
Alam, M., Alam, M. M., Curray, J. R., Chowdhury, M. L. R., and Gani, M. R.: An overview of the sedimentary geology of the Bengal Basin in relation to the regional tectonic framework and basin-fill history, Sedimentary Geol., 155, 179–208, https://doi.org/10.1016/S0037-0738(02)00180-X, 2003.
Alken, P., Thébault, E., Beggan, C. D., Amit, H., Aubert, J., Baerenzung, J., Bondar, T. N., Brown, W. J., Califf, S., Chambodut, A., Chulliat, A., Cox, G. A., Finlay, C. C., Fournier, A., Gillet, N., Grayver, A., Hammer, M. D., Holschneider, M., Huder, L., Hulot, G., Jager, T., Kloss, C., Korte, M., Kuang, W., Kuvshinov, A., Langlais, B., Léger, J.-M., Lesur, V., Livermore, P. W., Lowes, F. J., Macmillan, S., Magnes, W., Mandea, M., Marsal, S., Matzka, J., Metman, M. C., Minami, T., Morschhauser, A., Mound, J. E., Nair, M., Nakano, S., Olsen, N., Pavón-Carrasco, F. J., Petrov, V. G., Ropp, G., Rother, M., Sabaka, T. J., Sanchez, S., Saturnino, D., Schnepf, N. R., Shen, X., Stolle, C., Tangborn, A., Tøffner-Clausen, L., Toh, H., Torta, J. M., Varner, J., Vervelidou, F., Vigneron, P., Wardinski, I., Wicht, J., Woods, A., Yang, Y., Zeren, Z., and Zhou, B.: International Geomagnetic Reference Field: the thirteenth generation, Earth Planet. Space, 73, 49, https://doi.org/10.1186/s40623-020-01288-x, 2021.
Ameen, S. M. M., Wilde, S. A., Kabir, Md. Z., Akon, E., Chowdhury, K. R., and Khan, Md. S. H.: Paleoproterozoic granitoids in the basement of Bangladesh: A piece of the Indian shield or an exotic fragment of the Gondwana jigsaw?, Gondwana Res., 12, 380–387, https://doi.org/10.1016/j.gr.2007.02.001, 2007.
Ameen, S. M. M., Tapu, A.-T., and Hossain, M. S.: Precambrian Basement Rock of Bangladesh and Its Metallic Minerals, in: Bangladesh geosciences and resources potential, CRC Press Books, 25–54, https://doi.org/10.1201/9781003080817, 2021.
Arkani-Hamed, J.: Differential reduction to the pole: Revisited, Geophysics, 72, L13–L20, https://doi.org/10.1190/1.2399370, 2007.
Ashraf, A. and Filina, I.: New 2.75-D gravity modeling reveals the low-density nature of propagator wakes in the Juan de Fuca plate, Tectonophysics, 869, 230127, https://doi.org/10.1016/j.tecto.2023.230127, 2023a.
Ashraf, A. and Filina, I.: Zones of Weakness Within the Juan de Fuca Plate Mapped From the Integration of Multiple Geophysical Data and Their Relation to Observed Seismicity, Geochem. Geophy. Geosys., 24, e2023GC010943, https://doi.org/10.1029/2023GC010943, 2023b.
Balogun, O. B., Akereke, O. F., and Nwobodo, A. D.: Understanding the Constraints to the Correct Application of the Upward Continuation Operation in Gravity Data Processing, Pure Appl. Geophys., 180, 3787–3811, https://doi.org/10.1007/s00024-023-03348-1, 2023.
Blakely, R. J.: Potential theory in gravity and magnetic applications, Cambridge University Press, https://doi.org/10.1017/CBO9780511549816, 1996.
Brune, S., Kolawole, F., Olive, J.-A., Stamps, D. S., Buck, W. R., Buiter, S. J. H., Furman, T., and Shillington, D. J.: Geodynamics of continental rift initiation and evolution, Nat. Rev. Earth Environ., 4, 235–253, https://doi.org/10.1038/s43017-023-00391-3, 2023.
Calvín, P., Ruiz-Martínez, V. C., Villalaín, J. J., Casas-Sainz, A. M., and Moussaid, B.: Emplacement and Deformation of Mesozoic Gabbros of the High Atlas (Morocco): Paleomagnetism and Magnetic Fabrics, Tectonics, 36, 3012–3037, https://doi.org/10.1002/2017TC004578, 2017.
Chowdhury, K. R., Hossain, M. S., and Khan, M. S. H. (Eds.): Bangladesh geosciences and resources potential, First edition, CRC Press, Boca Raton, 610 pp., https://doi.org/10.1201/9781003080817, 2022.
Curray, J. R.: Geological history of the Bengal geosyncline, Journal of Association of Exploration Geophysicists, 12, 209–219, 1991.
Curray, J. R. and Moore, D. G.: Sedimentary and Tectonic Processes in the Bengal Deep-Sea Fan and Geosyncline, in: The Geology of Continental Margins, edited by: Burk, C. A. and Drake, C. L., Springer Berlin Heidelberg, Berlin, Heidelberg, 617–627, https://doi.org/10.1007/978-3-662-01141-6_45, 1974.
DeCelles, P. G.: Foreland Basin Systems Revisited: Variations in Response to Tectonic Settings, in: Tectonics of Sedimentary Basins, edited by: Busby, C. and Azor, A., Wiley, 405–426, https://doi.org/10.1002/9781444347166.ch20, 2011.
Filina, I., Biegert, E. K., Sander, L., Tschirhart, V., Bundalo, N., and Schiek-Stewart, C.: Integrated imaging: A powerful but undervalued tool, Leading Edge, 38, 720–724, https://doi.org/10.1190/tle38090720.1, 2019.
Fuller, R. E. and Waters, A. C.: The Nature and Origin of the Horst and Graben Structure of Southern Oregon, J. Geol., 37, 204–238, 1929.
Gani, R. and Alam, M.: Sedimentation and basin-fill history of the Neogene clastic succession exposed in the southeastern fold belt of the Bengal Basin, Bangladesh: a high-resolution sequence stratigraphic approach, Sediment. Geol., 155, 227–270, https://doi.org/10.1016/S0037-0738(02)00182-3, 2003.
Hasan, M. M., Monir, A., and Hassan, M.: Evaluating the Energy and Mineral Resources Prospect and Future Development in Bangladesh: A Review, S&P Global Market Intelligence Research, https://doi.org/10.2139/ssrn.4484598, 2023.
Hendrickson, M. D.: Geologic interpretation of aeromagnetic and chemical data from the Oaks Belt, Wabigoon subprovince, Minnesota: implications for Au-rich VMS deposit exploration, Can. J. Earth Sci., 53, 176–188, https://doi.org/10.1139/cjes-2015-0141, 2016.
Hildenbrand, T. G.: Regional Crustal Structures and Their Relationship to the Distribution of Ore Deposits in the Western United States, Based on Magnetic and Gravity Data, Econ. Geol., 95, 1583–1603, https://doi.org/10.2113/gsecongeo.95.8.1583, 2000.
Hossain, I., Tsunogae, T., Rajesh, H. M., Chen, B., and Arakawa, Y.: Palaeoproterozoic U–Pb SHRIMP zircon age from basement rocks in Bangladesh: A possible remnant of the Columbia supercontinent, C. R. Geosci., 339, 979–986, https://doi.org/10.1016/j.crte.2007.09.014, 2007.
Hossain, Md. S., Khan, Md. S. H., Chowdhury, K. R., and Abdullah, R.: Synthesis of the Tectonic and Structural Elements of the Bengal Basin and Its Surroundings, in: Tectonics and Structural Geology: Indian Context, edited by: Mukherjee, S., Springer International Publishing, Cham, 135–218, https://doi.org/10.1007/978-3-319-99341-6_6, 2019.
Ibraheem, I. M., Tezkan, B., Ghazala, H., and Othman, A. A.: A New Edge Enhancement Filter for the Interpretation of Magnetic Field Data, Pure Appl. Geophys., 180, 2223–2240, https://doi.org/10.1007/s00024-023-03249-3, 2023.
Jaffal, M., Goumi, N. E., Kchikach, A., Aïfa, T., Khattach, D., and Manar, A.: Gravity and magnetic investigations in the Haouz basin, Morocco, Interpretation and mining implications, J. Afr. Earth Sci., 58, 331–340, https://doi.org/10.1016/j.jafrearsci.2010.03.012, 2010.
Jain, A. K., Banerjee, D. M., and Kale, V. S.: Tectonics of the Indian Subcontinent, Springer International Publishing, Cham, https://doi.org/10.1007/978-3-030-42845-7, 2020.
Kabir, Z. M., Chowdhury, K. R., Akon, E., Kazi, A. I., and Ameen, S. M. M.: Petrogenetic Study of Precambrian Basement Rocks from Maddhapara, Dinajpur, Bangladesh, Bangladesh Geoscience Journal, 7, 1–18, 2001.
Khan, A. A. and Rahman, T.: An analysis of the gravity field and tectonic evaluation of the northwestern part of Bangladesh, Tectonophysics, 206, 351–364, https://doi.org/10.1016/0040-1951(92)90386-K, 1992.
Khan, F. H.: Geology of Bangladesh, ISBN 9840511483, 1991.
Kharbish, S., Eldosouky, A. M., and Amer, O.: Integrating mineralogy, geochemistry and aeromagnetic data for detecting Fe–Ti ore deposits bearing layered mafic intrusion, Akab El-Negum, Eastern Desert, Egypt, Sci. Rep., 12, 15474, https://doi.org/10.1038/s41598-022-19760-x, 2022.
Kheyrollahi, H., Alinia, F., and Ghods, A.: Regional magnetic and gravity structures and distribution of mineral deposits in Central Iran: Implications for mineral exploration, J. Asian Earth Sci., 217, 104828, https://doi.org/10.1016/j.jseaes.2021.104828, 2021.
Ma, G., Huang, D., and Liu, C.: Step-Edge Detection Filters for the Interpretation of Potential Field Data, Pure Appl. Geophys., 173, 795–803, https://doi.org/10.1007/s00024-015-1053-6, 2016.
Magee, C., Ernst, R. E., Muirhead, J., Phillips, T., and Jackson, C. A.: Magma transport pathways in large igneous provinces: lessons from combining field observations and seismic reflection data, in: Dyke Swarms of the World: A Modern Perspective, Springer Geology, Springer, Singapore https://doi.org/10.1007/978-981-13-1666-1_2, 45–85, 2019.
Masum, M., Hoque, M. N., Akbar, M. A., Mahmud, Z., Rana, M. S., Razzaque, M. A., and Amin, M. A.: Geology and Precambrian Banded Iron Formation formed at Rangpur Platform in Bangladesh, International Journal Of Engineering Research And Development, 17, 43–57, 2021.
McCafferty, A. E., Stoeser, D. B., and Van Gosen, B. S.: Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska, Interpretation, 2, SJ47–SJ63, https://doi.org/10.1190/INT-2014-0010.1, 2014.
Mohamed, A., Abdelrady, M., Alshehri, F., Mohammed, M. A., and Abdelrady, A.: Detection of Mineralization Zones Using Aeromagnetic Data, Appl. Sci., 12, 9078, https://doi.org/10.3390/app12189078, 2022.
Moon, J. W.: The Mineral Industry of Bangladesh, U.S. Geological Survey, https://pubs.usgs.gov/myb/vol3/2020-21/myb3-2020-21-bangladesh.pdf (last access: 4 March 2026), 2022.
Morgan, J. P. and McIntire, W. G.: Quaternary Geology of The Bengal Basin, East Pakistan And India, Geol. Soc. Am. Bull., 70, 319, https://doi.org/10.1130/0016-7606(1959)70[319:QGOTBB]2.0.CO;2, 1959.
Mousa, S. A. W., Abdel Nabi, S. H., Araffa, S. A. S., Mansour, S. A., and Al Deep, M. A. I.: Geophysical exploration of titanomagnetite ore deposits by geomagnetic and geoelectric methods, SN Appl. Sci., 2, 444, https://doi.org/10.1007/s42452-020-2206-5, 2020.
Mukhopadhyay, D. and Matin, A.: Recent Studies on the Singhbhum Craton, Pinsa, 86, https://doi.org/10.16943/ptinsa/2020/49788, 2020.
Nabighian, M. N.: The Analytic Signal of Two-Dimensional Magnetic Bodies With Polygonal Cross-Section: Its Properties And Use For Automated Anomaly Interpretation, Geophysics, 37, 507–517, https://doi.org/10.1190/1.1440276, 1972.
Nasuti, Y., Nasuti, A., and Moghadas, D.: STDR: A Novel Approach for Enhancing and Edge Detection of Potential Field Data, Pure Appl. Geophys., 176, 827–841, https://doi.org/10.1007/s00024-018-2016-5, 2019.
Núñez-Demarco, P., Bonilla, A., Sánchez-Bettucci, L., and Prezzi, C.: Potential-Field Filters for Gravity and Magnetic Interpretation: A Review, Surv. Geophys., 44, 603–664, https://doi.org/10.1007/s10712-022-09752-x, 2023.
Ogah, A. J. and Abubakar, F.: Solid mineral potential evaluation using integrated aeromagnetic and aeroradiometric datasets, Sci. Rep., 14, 1637, https://doi.org/10.1038/s41598-024-52270-6, 2024.
Pham, L. T. and Oliveira, S. P.: Edge Enhancement of Magnetic Sources Using the Tilt Angle and Derivatives of Directional Analytic Signals, Pure Appl. Geophys., 180, 4175–4189, https://doi.org/10.1007/s00024-023-03375-y, 2023.
Pirajno, F. and Santosh, M.: Rifting, intraplate magmatism, mineral systems and mantle dynamics in central-east Eurasia: An overview, Ore Geol. Rev., 63, 265–295, https://doi.org/10.1016/j.oregeorev.2014.05.014, 2014.
Rahman, Md. M. and Ullah, S. E.: Inversion of Gravity Data for Imaging of a Sediment-basement Interface: A Case Study in the Northwestern Part of Bangladesh, Pure Appl. Geophys., 166, 2007–2019, https://doi.org/10.1007/s00024-009-0530-1, 2009.
Rangin, C. and Sibuet, J. C.: Structure of the northern Bay of Bengal offshore Bangladesh: Evidences from new multi-channel seismic data, Mar. Petrol. Geol., 84, 64–75, https://doi.org/10.1016/j.marpetgeo.2017.03.020, 2017.
Reimann, K. U. and Hiller, K.: Geology of Bangladesh, Geol. Mag., 132, 754–755, https://doi.org/10.1017/S0016756800019130, 1993.
Roest, W. R. and Pilkington, M.: Identifying remanent magnetization effects in magnetic data, Geophysics, 58, 653–659, https://doi.org/10.1190/1.1443449, 1993.
Roy, A. B. and Chatterjee, A.: Tectonic framework and evolutionary history of the Bengal Basin in the Indian subcontinent, Curr. Sci., 109, 271–279, 2015.
Ruppel, C.: Extensional processes in continental lithosphere, J. Geophys. Res., 100, 24187–24215, https://doi.org/10.1029/95JB02955, 1995.
Smith, W. H. F. and Sandwell, D. T.: Global Sea Floor Topography from Satellite Altimetry and Ship Depth Soundings, Science, 277, 1956–1962, https://doi.org/10.1126/science.277.5334.1956, 1997.
Sundararajan, N.: A General Perspective on Geophysical Methods in Mineral Exploration, in: On a Sustainable Future of the Earth's Natural Resources, Springer Earth System Sciences, Springer, Berlin, Heidelberg, 53–83, https://doi.org/10.1007/978-3-642-32917-3_3, 2012.
Troll, V. R., Mattsson, T., Upton, B. G. J., Emeleus, C. H., Donaldson, C. H., Meyer, R., Weis, F., Dahrén, B., and Heimdal, T. H.: Fault-Controlled Magma Ascent Recorded in the Central Series of the Rum Layered Intrusion, NW Scotland, J. Petrol., 61, egaa093, https://doi.org/10.1093/petrology/egaa093, 2021.
Uddin, A. and Lundberg, N.: Unroofing history of the eastern Himalaya and the Indo-Burman ranges; heavy-mineral study of Cenozoic sediments from the Bengal Basin, Bangladesh, J. Sediment. Res., 68, 465–472, https://doi.org/10.2110/jsr.68.465, 1998.
Valdiya, K. S.: The Making of India, Springer International Publishing, Cham, https://doi.org/10.1007/978-3-319-25029-8, 2016.
Veevers, J. J.: Gondwanaland from 650–500 Ma assembly through 320 Ma merger in Pangea to 185–100 Ma breakup: supercontinental tectonics via stratigraphy and radiometric dating, Earth-Sci. Rev., 68, 1–132, https://doi.org/10.1016/j.earscirev.2004.05.002, 2004.
Zhang, H., Greco, F., Sacek, V., Geng, M., and Liu, P.: Editorial: Applications of gravity anomalies in geophysics, Front. Earth Sci., 12, 1349161, https://doi.org/10.3389/feart.2024.1349161, 2024.
Zhang, S., Li, Z.-X., Evans, D. A. D., Wu, H., Li, H., and Dong, J.: Pre-Rodinia supercontinent Nuna shaping up: A global synthesis with new paleomagnetic results from North China, Earth Planet. Sc. Lett., 353–354, 145–155, https://doi.org/10.1016/j.epsl.2012.07.034, 2012.
Zhou, M.-F., Robinson, P. T., Lesher, C. M., Keays, R. R., Zhang, C.-J., and Malpas, J.: Geochemistry, Petrogenesis and Metallogenesis of the Panzhihua Gabbroic Layered Intrusion and Associated Fe–Ti–V Oxide Deposits, Sichuan Province, SW China, J. Petrol., 46, 2253–2280, https://doi.org/10.1093/petrology/egi054, 2005.
Short summary
The northwestern region of Bangladesh, an extension of India's ancient landmass, differs geologically from the sediment-covered rest of the country. Our research using gravity, magnetic, seismic, and drilling methods revealed distinctive magnetic anomalies suggesting gabbro rocks along fault lines, forming patterns of elevated and depressed blocks underground. This structural model, particularly in the Rangpur Saddle area, indicates significant potential for mineral resources.
The northwestern region of Bangladesh, an extension of India's ancient landmass, differs...
