The Sottunga-Jurmo Shear Zone: structure and deformation history of a crustal-scale ductile shear zone in SW Finland
Gespeichert in:
| Beteilige Person: | |
|---|---|
| Format: | Hochschulschrift/Dissertation Buch |
| Sprache: | Englisch |
| Veröffentlicht: |
Åbo
Åbo Akad. Univ. Press
2007
|
| Schriftenreihe: | Acta Academiae Aboensis
Ser. B, Mathematica et physica ; 67,1 |
| Schlagwörter: | |
| Links: | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015719666&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| Umfang: | 187 S. Ill., Kt. |
| ISBN: | 9789517653763 |
Internformat
MARC
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| 245 | 1 | 0 | |a The Sottunga-Jurmo Shear Zone |b structure and deformation history of a crustal-scale ductile shear zone in SW Finland |c Taija Torvela |
| 264 | 1 | |a Åbo |b Åbo Akad. Univ. Press |c 2007 | |
| 300 | |a 187 S. |b Ill., Kt. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Acta Academiae Aboensis : Ser. B, Mathematica et physica |v 67,1 | |
| 502 | |a Zugl.: Åbo, Univ., Diss., 2007 | ||
| 650 | 4 | |a Geologie | |
| 650 | 4 | |a Geology |z Finland | |
| 650 | 4 | |a Shear zones (Geology) |z Finland | |
| 650 | 0 | 7 | |a Scherzone |0 (DE-588)4179505-2 |2 gnd |9 rswk-swf |
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Datensatz im Suchindex
| _version_ | 1819356990879563776 |
|---|---|
| adam_text | CONTENTS
1.
INTRODUCTION TO THE PALAEOPROTEROZOIC GEOLOGY OF
SOUTHERN FINLAND
.........................................................................................5
1.1
An outline of the Svecofennian orogeny in Finland
............................5
1.2
Southwestern Finland
-
a closer look
...................................................13
1.3
palaeoproterozoic shear zones in sweden and estonia
....................16
1.3.1
Svecofennian shear structures in central Sweden.
..................................16
1.3.2
Svecofennian ductile shear zones in Estonia
.............................................18
2.
SOME THEORETICAL ASPECTS OF DEFORMATION
.............................22
2.1
basic concepts and terminology
...............................................................22
2.1.1
Stress
................................................................................................................22
2.1.2
Strain and deformation
.................................................................................24
2.2
Deformation within shear zones
..............................................................25
3.
ANALYTICAL METHODS
.................................................................................31
3.1
Geothermobarometry
.................................................................................31
3.1.1
some theoretical aspects
..............................................................................31
3.1.1.1
phase equilibrium reactions-some basic concepts
..........................................32
3.1.1.2
BASIC CONCEPTS OF GEOTHERMOBAROMETRIC CALCULATIONS
..................................34
3.2.1.3
ROLE OF FLUIDS IN METAMORPHISM
............................................................................36
3.1
Л
.4
The importance of petrography in geothermobarometry
...............................37
3.1.2
GEOTHERMOBAROMETERS APPLIED IN THE STUDY
..............................................39
3.2
Geochronology
..............................................................................................42
3.2.1
u-pb sims and
u
-рв
id-tims-analytical procedures
.............................46
3.2.2
40arr9ar method -analytical procedure
...................................................47
4.
THE SOTTUNGA-JURMO SHEAR ZONE
......................................................50
4.1
Introduction to the study area
................................................................50
4.2
Field observations
.........................................................................................53
4.2.1
Rock types: deformation styles and mineralogy
.......................................55
4.2.2
Structures
.......................................................................................................59
4.2.2.1
Structures in the gneisses
.....................................................................................59
Kökar
and
Hellsö
areas
66
Kyrkogårdsö
and
Skattskär
areas
68
Husö andFinnö
areas
72
Sottunga
73
Other structures
76
4.2.2.2
Mylonites
.................................................................................................................80
4.2.2.3
PSEUDOTACHYLYTES
...................................................................................................80
4.2.3
Summary of field observations.....................................................................
87
4.3
Microstructures
in different rock types
..............................................91
4.3.1
Gneissose rocks
...............................................................................................91
4.3.1.1
Gneisses outside SJSZ
.............................................................................................92
4.3.1.2
Gneisses at SJSZ margin
.........................................................................................93
4.3.1.3
Gneisses within SJSZ
...............................................................................................99
4.3.2
Mylonites and cataclasites
.........................................................................100
4.3.3
pseudotachylytes
.........................................................................................105
4.3.4
Summary of
microstructures
......................................................................108
4.4
Geochemistry
................................................................................................110
4.5
Age determinations
-
timing the activity of the shear zone
.........118
4.5.1
timing of the shearing-previousstudies
.................................................118
4.5.2
Sample description.
.......................................................................................120
4.5.2.1
Gneisses
...................................................................................................................122
4.5.2.2
Mylonites
...............................................................................................................124
4.5.2.3
Pegmatites
..............................................................................................................125
4.5.2.4
pseudotachylytes
.................................................................................................126
4.5.3
AGE RESULTS
.....................................................................................................126
4.5.3.1
Group I: PROTOLiTH ages
........................................................................................126
4.5.3.2
Group II: timing of ductile deformation
...........................................................138
Phase I ca.
1.85
Ga
(Dý
138
Phase II ca.
1.82-1.83
Ga
(D¡)
139
Phase III ca.
1.79-1.80
Ga (D4)
139
4.5.3.3
Group III: Pseudotachylyte age
.........................................................................140
Pegmatite
magmatic
ages
140
Pseudotachylyte
4ПАгҐАг
age
142
4.5.4
Summary and discussion
...................................................................................143
4.5.5
Conclusions
.......................................................................................................146
4.6
Geothermobarometry
....................................................................................148
4.6.1
field relationships, petrography and mineral chemistry
......................148
4.6.2
Geothermobarometry-results and interpretations.
.............................157
4.6.3
Conclusions
...................................................................................................162
5.
CONCLUSIONS AND SUMMARY
..................................................................164
5.1
The structures and deformation history of the study area
-
a
SUMMARY
...........................................................................................................164
5.2
Problems and uncertainties
......................................................................174
References
....................................................................................176
|
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| geographic_facet | Finnland Ålandinseln |
| id | DE-604.BV022512803 |
| illustrated | Illustrated |
| indexdate | 2024-12-20T12:57:03Z |
| institution | BVB |
| isbn | 9789517653763 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-015719666 |
| oclc_num | 166457809 |
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| physical | 187 S. Ill., Kt. |
| publishDate | 2007 |
| publishDateSearch | 2007 |
| publishDateSort | 2007 |
| publisher | Åbo Akad. Univ. Press |
| record_format | marc |
| series | Acta Academiae Aboensis |
| series2 | Acta Academiae Aboensis : Ser. B, Mathematica et physica |
| spellingShingle | Torvela, Taija The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland Acta Academiae Aboensis Geologie Geology Finland Shear zones (Geology) Finland Scherzone (DE-588)4179505-2 gnd |
| subject_GND | (DE-588)4179505-2 (DE-588)4001012-0 (DE-588)4113937-9 |
| title | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland |
| title_auth | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland |
| title_exact_search | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland |
| title_full | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland Taija Torvela |
| title_fullStr | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland Taija Torvela |
| title_full_unstemmed | The Sottunga-Jurmo Shear Zone structure and deformation history of a crustal-scale ductile shear zone in SW Finland Taija Torvela |
| title_short | The Sottunga-Jurmo Shear Zone |
| title_sort | the sottunga jurmo shear zone structure and deformation history of a crustal scale ductile shear zone in sw finland |
| title_sub | structure and deformation history of a crustal-scale ductile shear zone in SW Finland |
| topic | Geologie Geology Finland Shear zones (Geology) Finland Scherzone (DE-588)4179505-2 gnd |
| topic_facet | Geologie Geology Finland Shear zones (Geology) Finland Scherzone Finnland Ålandinseln Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=015719666&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV005391449 |
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