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The foreland state at the onset of the flexurally induced transgression: data from provenance analysis at the peripheral Carpathian Foredeep (Czech Republic)

. Geology 97, 1, 153–156 (in Czech). Collinson J., Mountney N. & Thompson D. 2006: Sedimentary Structures. Terra Publishing , Harpenden, Hertfordshire, England. 1–292. Crampton S.L. & Allen P.A. 1995: Recognition of forebulge unconformities associated with early stage foreland basin development: example from the north Alpine foreland basin. AAPG Bull . 79, 1495–1514. Čopjaková R., Sulovský P. & Otava J. 2002: Comparison of the chemistry of detritic pyrope-almandine garnets of the Luleč Conglomerates with the chemistry of granulite garnets from the

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The use of quality management techniques to analyse the cluster of porosities on the turbine outlet nozzle

Abstract

As part of continuous quality improvement in well-managed enterprises, identifying unconformity should initiate actions to find their causes. Therefore, it was proposed to the enterprise located in Podkarpacie to use in the sequential way the Ishikawa diagram and 5Why method. The aim was to analyse of unconformity (porosity cluster) on the turbine outlet nozzle and identify the root of its creation. In the enterprise, the quality analysis of the products with a fluorescent method was carried out, but after identifying the unconformity, non-analysis of their reason for their occurrence was not practiced. Therefore, it was intentional to propose the use of sequence i.e. Ishikawa diagram and 5Why method to identify the root of unconformity. The subject of study was the turbine outlet nozzle, on which the fluorescent method the porosity cluster was identified. With the use of the Ishikawa diagram, the main cause of the problem was pointed (unconformity during production), and by the 5Why method the root cause of the problem, i.e. unconformity material from the supplier, was identified. The proposed method sequence is a simple and effective way to make analyses of unconformities and it can be used in different products and service enterprises.

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Cenozoic synthem stratigraphic architecture of the SE Brazilian shelf and its global eustatic context: evidence from the Pelotas Basin (offshore Brazil)

.G.St.C., Macurda, B., Martinsen, O.J., Miall, A.D., Nummedal, D., Posamentier, H.W., Pratt, B.R., Shanley, K.W., Steel, R.J., Strasser, A. & Tucker, M.E., 2010. Sequence stratigraphy: common ground after three decades of development. First Break 28, 21-34. Catuneanu, O., Galloway, W.E., Kendall, C.G.St.C., Miall, A.D., Posamentier, H.W., Strasser, A. & Tucker, M.E., 2011. Sequence stratigraphy: methodology and nomenclature. Newsletters on Stratigraphy 44, 173-245. Chang, K.H., 1975. Unconformity-bounded stratigraphic units. Geological Society of

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Predictive diagenetic clay-mineral distribution in siliciclastic rocks as a tool for identifying sequence boundaries in non-marine successions: the Coalspur Formation, west-central Alberta

and sea level along a major unconformity, Monte Camposauro, Italy. Journal of Sedimentary Research 6, 889-903. Dawson, F. M., Kalkreuth, W. D. & Sweet, A. R., 1994. Stratigraphy and coal resource potential of the Upper Cretaceous to Tertiary strata of northwestern Alberta. Geological Survey of Canada Bulletin 466, 60 pp. Dutta, P., 1992. Climatic influence on diagenesis fluvial sandstones. [In:] K. Wolf & G. Chillingrain (Eds): Diagenesis III. Developments in Sedimentology 47, 674 pp

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Quaternary alluvial fan systems of the Agri intermontane basin (southern Italy): tectonic and climatic controls

-248. Robustelli G., Lucà L., Corbi F., Pelle T., Dramis F., Fubelli G., Scarciglia F., Muto F. & Cugliari D. 2009: Alluvial terraces on the Ionian coast of northern Calabria, southern Italy: Implications for tectonic and sea level controls. Geomorphology 106, 165-179. Salvador A. 1987: Unconformity-bounded stratigraphic units. Geol. Soc. Amer. Bull. 98, 232-237. Schiattarella M. 1998: Quaternary tectonics of the Pollino Ridge, Calabria-Lucania boundary, southern Italy. In: Holdsworth R.E., Strachan R.A. & Dewey J.F. (Eds

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Palaeo-earthquake events during the late Early Palaeozoic in the central Tarim Basin (NW China): evidence from deep drilling cores

, D.C., 2010. The character and significance of paleo-seismic records of the Late Ordovician in Manjiaer Depression and its adjacent area, Tarim Basin, Xinjiang. Acta Geologica Sinica 84, 1805-1816 (in Chinese with English abstract). He, B.Z., Xu, Z.Q., Jiao, C.L., Li, H.B. & Cai, Z.H., 2011. Tectonic unconformities and their forming: implication for hydrocarbon accumulations in Tarim Basin. Acta Petrologica Sinica 27, 253-265 (in Chinese with English abstract). He, B.Z., Jiao, C.L., Xu, Z.Q., Liu, S.L., Cai, Z.H., Li, H.B. & Zhang, M., 2013. Unconformity

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The Crati River Basin: geomorphological and stratigraphical data for the Plio–Quaternary evolution of northern Calabria, South Apennines, Italy

Italy. J. Geophys. Res. 98, 21741–21772. Wortel M.J.R. & Spackman W. 1993: The dynamic evolution of the Apenninic-Calabrian, Hellenic and Carpathian arcs: a unifying approach. Terra Nova Abstract 5, 97. Young J. & Colella A. 1988: Calcarenous nannofossils from the Crati Basin. In: Colella A. (Ed.): Fan Deltas-Excursion Guidebook. Università della Calabria, Cosenza, 79–96. Zecchin M., Praeg D., Ceramicola S. & Muto F. 2015: Onshore to offshore correlation of regional unconformities in the Plio–Pleistocene sedimentary successions of the Calabrian

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Geological probability calculation of new gas discoveries in wider area of Ivana and Ika Gas Fields, Northern Adriatic, Croatia

Abstract

There are eleven reservoirs in Ivana Gas Field and they are composed of Pleistocene sands, silt sands and siltstones, developed in dominant clays and marls depositional sequences. Ika Gas Field is the only field in Adriatic with gas accumulated in carbonate rocks, which are the deepest reservoir of the total four reservoirs. A carbonate reservoir is defined with tectonical and erosional unconformity, which is placed between Mesozoic and Pliocene rocks. The three younger Ika reservoirs are composed of Pleistocene sands, silt sands and siltstones that are laminated into clays and marls. The goal of our study was to assess the ‘Probability Of Success’ (POS) of finding new gas accumulations within the marginal area of those two fields, either in the form of Mesozoic rocks or Pleistocene deposits. The assessment was successfully completed using the Microsoft Excel POS table for the analyzed areas in the Croatian part of the Po Depression, namely, Northern Adriatic. The methodology was derived and adapted from a similar POS calculation, which was originally used to calculate the geological probability of hydrocarbon discoveries in the Croatian part of the Pannonian Basin System (CPBS).

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Tectonosedimentary framework of Upper Cretaceous –Neogene series in the Gulf of Tunis inferred from subsurface data: implications for petroleum exploration

Abstract

The objective and the main contribution of this issue are dedicated to using subsurface data to delineate a basin beneath the Gulf of Tunis and its neighbouring areas, and to investigate the potential of this area in terms of hydrocarbon resources. Available well data provided information about the subsurface geology beneath the Gulf of Tunis. 2D seismic data allowed delineation of the basin shape, strata geometries, and some potential promising subsurface structures in terms of hydrocarbon accumulation. Together with lithostratigraphic data obtained from drilled wells, seismic data permitted the construction of isochron and isobath maps of Upper Cretaceous-Neogene strata. Structural and lithostratigraphic interpretations indicate that the area is tectonically complex, and they highlight the tectonic control of strata deposition during the Cretaceous and Neogene. Tectonic activity related to the geodynamic evolution of the northern African margin appears to have been responsible for several thickness and facies variations, and to have played a significant role in the establishment and evolution of petroleum systems in northeastern Tunisia. As for petroleum systems in the basin, the Cretaceous series of the Bahloul, Mouelha and Fahdene formations are acknowledged to be the main source rocks. In addition, potential reservoirs (Fractured Abiod and Bou Dabbous carbonated formations) sealed by shaly and marly formations (Haria and Souar formations respectively) show favourable geometries of trap structures (anticlines, tilted blocks, unconformities, etc.) which make this area adequate for hydrocarbon accumulations.

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The First Dating of Cave Ice from the Tatra Mountains, Poland and its Implication to Palaeoclimate Reconstructions

The First Dating of Cave Ice from the Tatra Mountains, Poland and its Implication to Palaeoclimate Reconstructions

Lodowa Cave in Ciemniak, which belongs to the dynamic ice cave type, contains the biggest perennial block of cave-ice in the Tatra Mountains. The ice represents congelation type, since it originates from freezing of water which infiltrates the cave. Two generations of ice have been recognized in this cave. They are divided by the distinct unconformity. The ice building both generations is layered. Two moths which were found in the younger generations were sampled and dated by 14C method yielding 195 ± 30 and 125 ± 30 years. Bearing in mind the position in the section and the fact that the cave ice has waned since the 20s of the last century, the age is 1720-1820 AD and 1660-1790 AD respectively. It proves that the ice was formed during the Little Ice Age. Hence, the erosion boundary which underlies this generation records the degradation of ice before the Little Ice Age most probably during the Medieval Warm Period. The ice volume in the cave was substantially smaller before the Little Ice Age than it is today, despite the clear tendency to melting, which has been recognized since 20s of the last century. The older generation of ice is supposed to have its origins in a cold stage between the Atlantic period and the Medieval Warm Period.

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