Juha Köykkä - Oulu

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Res Terrae, Ser. A 32, J. <strong>Köykkä</strong>, Sedimentology of the Mesoproterozoic Telemark basin-fills, South Norway: implications for sedimentation processes, depositional environments and tectonic evolution Fig. 4. Lithostratigraphy of the Telemark supracrustal rocks. The succession is subdivided into the Vestfjorddalen Supergroup (ca. 1.5–1.35 Ga) and overlying early Sveconorwegian units (ca. 1.17–1.019 Ga) separated by the sub-Svinsaga unconformity. Studied formations in this thesis included the Vemork, Heddersvatnet, Gausta, Skottsfjell, Vindsjå, Brattefjell, and Svinsaga formations. Also, sub-Heddersvatnet and sub-Svinsaga unconformities were considered. Age limits are taken from Laajoki et al. (2002), Bingen et al. (2003, 2006), and Lamminen et al. (2009b). SHU: sub-Heddersvatnet unconformity, HF: Heddersvatnet Formation, GDF: Gausdalen fault zone. 36
Res Terrae, Ser. A 32, J. <strong>Köykkä</strong>, Sedimentology of the Mesoproterozoic Telemark basin-fills, South Norway: implications for sedimentation processes, depositional environments and tectonic evolution 4 Methods From the viewpoint of research and methods, sedimentology is a broad concept that involves elements of stratigraphy, sequence stratigraphy, sedimentary petrology and geochemistry. The data collection and analytical procedures of the study of sedimentary basins are mostly determined by the nature and purposes of the research project. A successful basin analysis with sedimentological constructions and interpretations requires the understanding and integration of several methods, as well as sufficient data and robust analyses to build a coherent basin model and synthesis of geological evolution. This is particularly true when dealing with Precambrian strata, which are usual- ly at least partially metamorphosed and tectonically deformed. The main methods and analytical tools used in this thesis include (1) regional mapping and lithostratigraphy, (2) facies analysis, (3) sequence stratigraphy, (4) clastic petrofacies analysis, (5) geochemistry, and, finally, (6) sedimentary basin paleotectonic reconstruction. The basin analysis flow chart used in this thesis is presented in Figure 5. This chapter summariz- es the principles and fundamental ideas of each method and the tools used in this thesis. 37
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Juha Köykkä - Oulu

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