Technical Report

TR-98-21

ISSN 0284-3757CM Gruppen AB, Bromma, 1999

Crustal structure and regional tectonics of SE Sweden and the Baltic Sea

Alan Geoffrey Milnes

Department of Geology

University of Bergen, Norway

David G Gee and Carl-Erik Lund

Department of Earth Sciences

Uppsala University, Sweden

November 1998

Cru

stal structu

re and

regio

nal tecto

nics o

f SE

Sw

eden

and

the B

altic Sea

TR-98-21

Svensk Kärnbränslehantering ABSwedish Nuclear Fueland Waste Management CoBox 5864SE-102 40 Stockholm Sweden Tel 08-459 84 00 +46 8 459 84 00Fax 08-661 57 19 +46 8 661 57 19

Technical Report

TR-98-21

ISSN 0284-3757CM Gruppen AB, Bromma, 1999

Crustal structure and regional tectonics of SE Sweden and the Baltic Sea

Ala Geoffrey Milnes

Department of Geology

University of Bergen, Norway

David G Gee and Carl-Erik Lund

Department of Earth Sciences

Uppsala University, Sweden

November 1998

Cru

stal structu

re and

regio

nal tecto

nics o

f SE

Sw

eden

and

the B

altic Sea

TR-98-21

Svensk Kärnbränslehantering ABSwedish Nuclear Fueland Waste Management CoBox 5864SE-102 40 Stockholm Sweden Tel 08-459 84 00 +46 8 459 84 00Fax 08-661 57 19 +46 8 661 57 19

AbstractSammanfattningTable of contentsSummary and conclusions1. Introduction2. Deep seismic data2.1 Introduction2.2 Eurobridge DSS profiles2.2.1 Eurobridge main profile, EBR-1 (1994)2.2.2 Eurobridge coast profile, EBR-1A (1994)

2.3 Earlier DSS profiles2.3.1 TTZ'92 profile I (1992)2.3.2 Baltic sea profile (1989)2.3.3 Babel (1989), DSS profiles AC and B2.3.4 Eugeno-S (1984), profile 42.3.5 Fennolora profile (1979), shotpoints B-C

2.4 Babel CDP profiles2.5 Summary

3. Regional tectonics3.1 Introduction3.2 Formation of the svecokarelian crust3.3 Post-cratonization history3.4 Reactivation of precambrian shear zones3.4.1 Ductile shear zones3.4.2 Brittle reactivation

3.5 Summary

4. Discussion4.1 Crustal composition4.2 Crustal structure4.3 Crustal evolution4.4 Crustal rheology

ReferencesList of SKB reports

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