Proterozoic coastal sabkha halite pans: an example from the pranhita-godavari valley,South India |
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| Institution: | 1. Durgapur Government College, Durgapur 713 214, West Bengal, India;2. Jadavpur University, Kolkata 700 032, West Bengal, India;3. Department of Geology, University of Pretoria, Pretoria 0002, South Africa;1. Key Laboratory of Computational Geodynamics, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;2. Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China;3. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736202, China;1. Department of Geology, University of Delhi, Delhi, India;2. Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima, Japan;1. Centre for Advanced Study, Department of Geology, Presidency University, Kolkata, 700073, India;2. Department of Earth and Planetary Systems Science, Hiroshima University, Higashi Hiroshima, 7398526, Japan;3. Hiroshima Institute of Plate Convergence Region Research (HiPeR), Hiroshima University, 739 8526, Japan;1. Dto de Geología, Universidad Nacional del Sur, Comisión de Investigaciones Científicas (CIC), San Juan 670, 8000 Bahía Blanca, Argentina;2. Laboratorio de Análisis de Cuencas – CICTERRA, Universidad Nacional de Córdoba, Av. Vélez Sársfield 1611, Of. 7, 2° Piso, X5016GCA Córdoba, Argentina;3. Dpt. Earth and Planetary Sciences, GEMOC, Macquarie University, Sydney, NSW 2109, Australia;4. CONICET, INGEOSUR, San Juan 670, 8000 Bahía Blanca, Argentina;5. Department of Geosciences, University of Arizona, Tucson, AZ, USA |
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| Abstract: | Extensive occurrences of pseudomorphs and casts of halite in association with wave-formed shallow water structures and evidence of emergence in quartzarenites at the base of the middle Proterozoic Pakhal Group (c. 1276 ± 20 Ma) in South India point to the development of sabkha environments in arid to semi-arid elimatic conditions. Periodic inundation of the sabkha during storm and subsequent desiccation led to displacive growth of the halite and its dissolution within the sediment just below the surface. The brine pools within the sabkha seem to have developed in fault controlled topographic depressions formed at the embryonic stage of an intra-continental rift ocean or graben system. |
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