3D seismic analysis of karstified interbedded carbonates and evaporites,Lower Permian Gipsdalen Group,Loppa High,southwestern Barents Sea |
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| Affiliation: | 1. Department of Geosciences and Natural Resources Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;2. Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen K, Denmark;3. University Centre in Svalbard, P. O Box 156, N-9171 Longyearbyen, Norway;4. Dong Energy E&P Norge AS, Veritasveien 25, N-4002 Stavanger, Norway;1. Geological Survey of Canada, 3303-33rd, St NW, Calgary, AB, T2L 2A7, Canada;2. University of Ottawa, 1125 Colonel By Dr., Ottawa, ON, K1S 5B6, Canada;1. The Natural History Museum of Denmark, Øster Voldgade 5-7, DK-1350 København K, Denmark;2. The University Centre in Svalbard (UNIS), Pb 156, NO-9171 Longyearbyen, Norway;1. Department of Geosciences, UiT – The Arctic University of Norway, PO Box 6050 Langnes, 9037 Tromsø, Norway;2. Department of Petroleum Engineering, University of Stavanger, 4036 Stavanger, Norway;3. Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K Denmark;4. Department of Arctic Geology, University Centre in Svalbard, PO Box 156, 9171 Longyearbyen, Norway;5. Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen K, Denmark;1. Department of Geosciences, University of Oslo, 0316 Oslo, Norway;2. Centre for Earth Evolution and Dynamics, University of Oslo, 0316 Oslo, Norway |
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| Abstract: | This paper presents a detailed seismic analysis of a hitherto undescribed Permian succession interpreted to consist of interbedded anhydrite and carbonate from the northern flank of the Loppa High, western Barents Sea. The Fafner succession forms a locally restricted transgressive unit down-dip on the rotated Loppa High. It is subdivided into four seismic sequences each interpreted to be composed of a basal transgressive anhydrite overlain by highstand carbonates. Fafner seismic sequences 2 and 3 include well-developed buildup complexes which in map view form polygonal patterns.Analysis of attribute maps indicates that the Fafner succession is overprinted by two dissolution systems related to two prominent events of subaerial exposure, creating numerous paleo-sinkholes, breccia-pipes, and collapsed composite cavern systems.The stratigraphical position of the Fafner succession, below the Mid Sakmarian – Artinskian Bjarmeland Group and above the Top Ørn unconformity, resembles that of the Lower Permian Gipshuken Formation on Spitsbergen, and the Fafner succession is thus regarded as its offshore equivalent. |
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| Keywords: | 3D seismic interpretation Seismic attributes Seismic stratigraphy The Barents Sea Upper Paleozoic Karst Hydrocarbon exploration Carbonates |
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