Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, ... Hansteen Page(s): 1-13 Download 3,6 MB Melt-mineral-fluid interaction in pealkaline silicic intrusions in the Oslo Rift, ... Burke Page(s): 15-32 Download 6,7 MB Melt-mineral-fluid interaction in peralkaline silicic intrusions in the Oslo Rift, ...
Action map for tunnel planning, Oslofjord - Telemark region: Mapping deeply weathered weakness zones
Joints and fractures were weathered during a sub-tropical climate regime and thus may contain smectite and kaolinite. The presence of such minerals prohibits groundwater flow in fracture and fault zones. The clay-bearing zones may cause mechanical problems during both tunnel construction and later operation. Due to the chemical alteration of magnetic minerals during weathering, weak zones are characterized by negative magnetic anomalies.
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