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21.
22.
Ole Rn Clausen Ole Bjrslev Nielsen Mads Huuse Olaf Michelsen 《Global and Planetary Change》2000,24(3-4)
The timing and effect of the Cenozoic uplift of Scandinavia has been investigated using a multi-disciplinary approach involving sedimentological, seismic and biostratigraphic data from the Danish and the adjacent Norwegian parts of the North Sea Basin. It is concluded that significant uplift took place periodically throughout the Palaeogene possibly marking an earlier onset of the so-called “Neogene uplift” of Scandinavia. This conclusion is based on a number of sedimentological observations, including smectite content, grain-size variations, kaolinite thermal stabilities and Tmax values supported by seismic reflection geometries and biostratigraphic data. These data indicate several phases of re-working of Palaeogene and older sediments situated further to the east and northeast during the middle to late Eocene and during the middle to late Oligocene. The tectonic patterns were similar during the late Paleocene and the Oligocene with some inversion taking place, whereas no inversion has been observed during the Eocene. Main provenance areas were to the north and northeast during the Paleocene and Oligocene, whereas the Eocene sediments originate mainly from the British Isles to the west. It is proposed that Palaeogene uplift of Scandinavia was associated with regional tectonic movements along crustal zones of weakness, which were reactivated as they accommodated strain induced by the Alpine Orogeny and the opening of the North Atlantic. 相似文献
23.
Padel Maxime Álvaro J. Javier Casas Josep Maria Clausen Sébastien Poujol Marc Sánchez-García Teresa 《International Journal of Earth Sciences》2018,107(5):1579-1601
International Journal of Earth Sciences - The volcanism hosted by the Ediacaran–Terreneuvian Canaveilles Group of the Eastern Pyrenees displays two distinct geochemical affinities: (1)... 相似文献
24.
S.B. Nielsen K. Gallagher D.L. Egholm O.R. Clausen M. Summerfield 《Journal of Geodynamics》2009,48(2):101-106
In this reply, we address the issues raise by the comment of Lidmar-Bergström and Bonow [Lidmar-Bergström, K., Bonow, J., 2009. Hypotheses and observations on the origin of the landscape of southern Norway – a reply regarding the isostasy–climate–erosion hypothesis by Nielsen et al., 2008. Journal of Geodynamics, in press]. We reject them and maintain all our suggestions regarding western Scandinavia unaltered. 相似文献
25.
26.
Lars Clausen 《Natural Hazards》1992,6(2):181-190
To explain both origin and outcome of disasters (natural, technical, and war-borne), as well as social action during disasters proper, a macrosociological model of internal causation is introduced (PERDUE). It consists of six stages of possible, and of most likely paths of social change between these six (Peace is founded, Everyday routine, Rising class struggle, Disasters strike, Unconditional surrender of collective defence, and Evaporation of common values). The stages are developed by making use of three dimensions of social change (rapidity, radicality, and rituality), and described. 相似文献
27.
28.
Summary Metal substitution studies of the stability, structure and chemical bonding of sulfides and sulfosalts lead to significant results, which can be applied to natural parageneses and crystal chemical systematics. Comparison of experiments on stable and metastable phases with thin films provides data, which exceed known geometrical criteria of the sulfosalt systematics. Synthetic and natural phases have been studied with respect to their substitution, bonding chemistry and temperature dependent metal distribution as well as to the structure and orientation of thin films.
With 13 Figures
In memoriam Prof. Dr. V. Kupcik ( 1990) 相似文献
Zusammenfassung Die Untersuchung der Stabilität, Struktur und chemischen Bindung von Sulfosalzen führt zu aussagekräftigen auf natürliche Paragenesen sowie auf die Systematik dieser Verbindungen anwendbaren Resultaten, wenn systematische Substitutionsexperimente angesetzt werden. Diese liefern im Vergleich von stabilen und metastabilen Phasen sowie durch Vergleich mit dünnen Schichten Ergebnisse, die wesentlich über bekannte strukturgeometrische Ansätze zur Sulfosalzsystematik hinausgehen. Es werden synthetische und natürliche Verbindungen bezüglich ihrer Substitution, Bindungschemie und temperaturabhängigen Metallordnung sowie die Orientierung und Struktur von dünnen Schichten diskutiert.
With 13 Figures
In memoriam Prof. Dr. V. Kupcik ( 1990) 相似文献
29.
Jens Wenzel Andreasen Emil Makovicky Bente Lebech Sven Karup Møller 《Physics and Chemistry of Minerals》2008,35(8):447-454
Rietveld refinement of neutron powder diffraction data on four samples of synthetic, iron-bearing tetrahedrite (Cu12?xFexSb4S13) with x = 0.28, 0.69, 0.91, 2.19 and four samples of synthetic tennantite (Cu12?xFexAs4S13) with x = 0.33, 0.38, 0.86, 1.5 indicate unambiguously that iron is incorporated into tetrahedral M1 (12d) sites and not into triangular M2 (12e) sites in the cubic crystal structure (space group I $ \ifmmode\expandafter\bar\else\expandafter\=\fi{4} Rietveld refinement of neutron powder diffraction data on four samples of synthetic, iron-bearing tetrahedrite (Cu12−xFexSb4S13) with x = 0.28, 0.69, 0.91, 2.19 and four samples of synthetic tennantite (Cu12−xFexAs4S13) with x = 0.33, 0.38, 0.86, 1.5 indicate unambiguously that iron is incorporated into tetrahedral M1 (12d) sites and not into triangular M2 (12e) sites in the cubic crystal structure (space group I 3 m). The refinement results also confirm that M2 is a split (24g), flat-pyramidal site situated statistically on both sides of the S1−S1–S2 triangle. In tetrahedrite, this split is about
0.6 ?, in tennantite about 0.7 ?. Trends in bond lengths and magnitude of the M2 split were evaluated by means of linear regression
with Fe concentration as the independent variable. 相似文献
30.
A stratigraphic analysis of late Palaeocene sands of the Søgne Basin and the western part of the Norwegian–Danish Basin shows that the sand bodies are of differenct ages. The geographic distribution of the sand deposits shows that they are related to underlying Mesozoic structures suggesting a controlling effect of Tertiary tectonics on the deposition of sand during the late Palaeocene. However, the structural setting of various sand bodies varies from reactivation of older faults and reactivation of salt structures. The local character of the structures active during the late Palaeocene introduces minor depressions with no lateral connection. The sand bodies, which are interpreted as having been deposited in these depressions, are thus in general separate bodies with no lateral connection. The Fennoscandian shield and eroded Mesozoic sediments along the Fennoscandian Border Zone are suggested as source area for the late Palaeocene sand deposits. 相似文献