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Titolo:
Reconstruction of Late Paleozoic heat flows and burial histories at the Rhenohercynian-Subvariscan boundary, Germany
Autore:
Noth, S; Karg, H; Littke, R;
Indirizzi:
Rhein Westfal TH Aachen, Inst Geol & Geochem Petr & Coal, D-52056 Aachen, Germany Rhein Westfal TH Aachen Aachen Germany D-52056 , D-52056 Aachen, Germany Univ Cologne, Inst Geol, D-50674 Cologne, Germany Univ Cologne Cologne Germany D-50674 Inst Geol, D-50674 Cologne, Germany
Titolo Testata:
INTERNATIONAL JOURNAL OF EARTH SCIENCES
fascicolo: 2, volume: 90, anno: 2001,
pagine: 234 - 256
SICI:
1437-3254(200106)90:2<234:ROLPHF>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARBONIFEROUS RUHR BASIN; PETROLEUM; MODEL; EVOLUTION; REFLECTANCE; GENERATION;
Keywords:
Variscan orogen; Rhenohercynian-Subvariscan transition zone; Herzkamp syncline; vitrinite reflectance; coalification pattern; numerical modelling; basin modelling; heat-flow evolution; burial history; temperature history;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Noth, S Texas A&M Univ, Dept Geol & Geophys, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 College Stn, TX 77843 USA
Citazione:
S. Noth et al., "Reconstruction of Late Paleozoic heat flows and burial histories at the Rhenohercynian-Subvariscan boundary, Germany", INT J E SCI, 90(2), 2001, pp. 234-256

Abstract

The thermal and burial history of the Herzkamp syncline, located in the transition zone between the Variscan Rhenish Massif and the Ruhr foreland basin (western Germany), was reconstructed using PDI/PC-1D-basin modelling software (IES), The models were calibrated with new vitrinite reflectance datameasured on Palaeozoic outcrop samples. High sample density and quality ofthe calibration data allowed a 3D reconstruction of the heat flow as well as of burial and erosion history. Vitrinite reflectance values range from 0.8 to 4.9%R-r and generally increase with increasing stratigraphic age. Thecoalification pattern confirms pre-tectonic maturation, especially in the western part of the study area. A "low-coalification zone" showing stagnating/decreasing coalification with increasing stratigraphic age exists, however, northeast of the Ennepe thrust, indicating synorogenic coalification. This anomaly is explained by early thrusting in the northern Rhenish Massif resulting in restricted burial/early uplift and thus lower thermal maturity. One result of numerical modelling is that palaeo-heat flows during maximum burial (Westphalian or post-Westphalian) decreased southwards from approximately 65 to less than 50 mW/m(2) Maximum burial depths for the base and top of the Namurian also decrease southwards from 7000 to 3600 m and 4600 to1800 m, respectively, resulting in southwards-decreasing coalification of the respective stratigraphic horizon. Eroded overburden increases southwards (3100-5700 m), with the exception of the low-coalification zone, which ischaracterised by lower amounts of eroded overburden (1300-2900 m) and an earlier onset of erosion, i.e, in the Westphalian B rather than Westphalian D or post-Westphalian.

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Documento generato il 10/07/20 alle ore 18:40:20