Anomalous drill-core parting in the sediments of the Upper Silesian Basin

0183177 - UGN-S 20033046 RIV PL eng J - Journal Article
Kožušníková, Alena - Fialová, Věra - Hoch, I.
Anomalous drill-core parting in the sediments of the Upper Silesian Basin.
Annales Societatis Geologorum Poloniae. Roč. 73, - (2003), s. 139-143. ISSN 0208-9068
R&D Projects: GA AV ČR KSK1012601; GA ČR GA105/02/0895
Institutional research plan: CEZ:AV0Z3086906
Keywords : core * anomalous parting * state of stress
Subject RIV: DB - Geology ; Mineralogy

Anomalous jointing of drillcores is sometimes observed in prospect boreholes in the Upper Silesian basin. The drillcore is jointed into discs, slices or porringers that are not resemblant to natural jointing. This occurs in various types of sediments, but especially in brittle rocks. Orientation of jointing planes is perpendicular to the borehole axis and does not depend on the distance from the front of the core run. Anomalous jointing reflects locally increased stress in the layer.
Permanent Link: http://hdl.handle.net/11104/0079691