Open AccessEstimating amount and timing of Late Palaeozoic uplift and erosion in the Rønne Graben, Bornholm, Denmark
Author(s) -
Sigmund Jensen,
Søren B. Nielsen
Publication year - 1995
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1995-42-03
Subject(s) - geology , graben , vitrinite reflectance , carboniferous , paleozoic , geothermal gradient , erosion , devonian , borehole , geomorphology , structural basin , paleontology , source rock
Late Palaeozoic uplift and erosion is evidenced by a discontinuous vitrinite reflectanceprofile of the Pernille-1 well situated in the Rønne Graben. Modelling vitrinite reflectanceevolution by the methods of basin modelling, the unconformity is estimated to representLate Carboniferous uplift and erosion of 3,300 m of Upper Silurian and Devonian sediments.Given a vitrinite reflectance value of 1.7% at the erosional surface, the maximum temperature obtained during deepest burial is 160-165°C, corresponding to a geothermal gradientof approximately 50°C/km. The sensitivity of the erosion estimate to the choice of modelparameter values is quantified. For example, a +10% uncertainty in the geothermal gradient equals an uncertainty of +400 m in the erosion estimate.