Mathematics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988gecoa..52.1145m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 52, Issue 5, pp.1145-1154
Mathematics
Scientific paper
The extractable aliphatic and aromatic hydrocarbons of twenty-four Lias shales from N.W. Germany have been analysed by gas chromatography-mass spectrometry. Particular attention has been paid to seven molecular measurements of thermal maturation which are based on appropriate ratios of the concentrations and products of certain reactions. A sequence of increasing maturity towards the area of the Bramscher Massiv was determined. Because the reactions involved occur at different rates, they reach completion at different levels of maturity and at variable distance from the centre of the Bramscher Massiv, as defined by iso-vitrinite reflectance contours reported previously for Rhaetic, Lias and Malm shales. This has allowed the designation of zones of increasing maturity. The molecular measurements appear more reliable assessors of maturity than vitrinite reflectance for samples less mature than the zone of oil generation, but are not applicable to samples from within this zone, because the reactions concerned have normally reached completion. A mathematical model suggests that the maturity of samples less mature than a vitrinite reflectance of 1%, can adequately be explained by substantial subsidence during Early and Middle Cretaceous followed by major uplift and inversion in Late Cretaceous time, without recourse to further heating from a deep seated igneous intrusion.
Altebäumer Franz-Josef
Disko Ulrich
Leythaeuser Detlev
MacKenzie Andrew S.
Rullkötter Jürgen
No associations
LandOfFree
Molecular measurements of maturity for Lias shales in N.W. Germany does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Molecular measurements of maturity for Lias shales in N.W. Germany, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular measurements of maturity for Lias shales in N.W. Germany will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-854606