The Adriatic continental margin

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Table of contents

1. Introduction
1.1 General remarks
1.2 The study areas: Remnants of fossil rifted margins
1.3 Aims of the Thesis
1.4 Thesis structure
2. Materials and methods
3. The Adriatic continental margin
3.1 Introduction
3.2 Geological setting
3.2.1 The proximal margin (Ortler and Ela nappes)
3.2.2 The necking zone
3.2.3 The distal margin (Err and Bernina nappes)
3.2.4 The ocean-continent transition (OCT, Platta nappe)
3.3 The Adriatic distal margin: the Err nappe
3.3.1 The present-day Alpine architecture
3.3.2 The Jurassic architecture: the Err detachment system
3.3.3 The major time lines in the Adriatic distal margin
3.4 The Adriatic ocean-continent transition: the Platta nappe The Results
4. The central distal margin
4.1 Piz Val Lunga area
4.1.1 Stratigraphy and petrography
4.2 Fuorcla Cotschna area
4.2.1 Stratigraphy and petrography
4.3 Isotope geochemistry and fluid inclusion data
4.3.1 O and C isotopes
4.3.2 Sr isotopes
4.3.3 He isotopes
4.3.4 Fluid inclusion microthermometry
4.4 First order interpretation
4.4.1 Dolomite
4.4.2 Dedolomitization
4.4.3 Breccias
4.4.4 Calcite cement
4.4.5 Veins
4.4.6 Silicification
4.4.7 Fe-Mn oxide coating
5.1 Mal Pass area
5.1.1 Stratigraphy and petrography
5.2 Isotope geochemistry and fluid inclusion data
5.2.1 O and C isotope
5.2.2 Sr isotopes
5.2.3 He isotopes
5.2.4 Fluid inclusion microthermometry
5.3 First order interpretation
5.3.1 Dolomite
5.3.2 Neptunian dykes and breccias
5.3.3 Veins
5.3.4 Septarian-like concretions and silicification
6. The proximal margin
6.1 Il Motto area
6.1.1 Stratigraphy and petrography
6.2 Isotope geochemistry and fluid inclusion data
6.2.1 O and C isotopes
6.2.2 Sr isotopes
6.2.3 Fluid inclusion microthermometry
6.3 First order interpretation
6.3.1 Dolomite
6.3.2 Breccias
6.3.3 Dolomite and calcite cements
6.3.4 Veins
7. The inner distal margin
7.1 Piz Alv area
7.1.1 Stratigraphy and petrography
7.2 Isotope geochemistry
7.2.1 O and C isotopes
7.2.2 Sr isotopes
7.3 First order interpretation
8. U-Pb dating
8.1 The dataset
8.2 Discussion and interpretation
9. Trace elements and REE
9.1 Introduction
9.2 Analysed samples
9.2.1 Reference samples
9.3 The Hauptdolomit Fm. along the Adriatic continental margin
9.4 The Hauptdolomit Fm. in the distal margin
9.5 Dolomite veins in the distal margin
9.6 Silicification
9.7 Fe-Mn oxides
9.8 Discussion and interpretation
9.8.1 The distal margin
10. Discussion: Fluid characteristics and flow pathways
10.1 Introduction
10.2 Data constraints on the hydrothermal features of the fluids
10.3 Evolutionary model
10.3.1 Similar conditions but different products: why?
10.3.2 The two diagenetic stages along the Adriatic continental margin
11. The Pyrenean hyper-extended rift system
11.1 Introduction
11.2 The Bay of Biscay-Pyrenean domain
11.2.1 Large-scale rift architecture of the Arzacq-Mauléon system
11.2.2 The stratigraphy of the Arzacq-Mauléon basin
11.2.3. Mantle-derived rock occurrences in the Mauléon Basin
11. 3 The Chaînons Béarnais
11.3.1 The study area
12. Black Dolomites Unit
12.1 Stratigraphy and petrography
12.2 Stable isotope geochemistry
12.2.1 O and C isotopes
12.3 First order interpretation
12.3.1 Dolomite
12.3.2 Breccias
12.3.3 Dolomite and calcite cements
12.3.4 Veins
13. Black Limestones Unit
13.1 Introduction
13.2 The Quarries area
13.2.1 Stratigraphy and petrography
13.3 Isotope geochemistry and fluid inclusion data
13.3.1 O and C isotopes
13.3.2 Fluid inclusion microthermometry
13.4 First order interpretation
13.4.1 Breccias
13.4.2 Calcite and dolomite cements
13.4.3 Veins
13.5 The Riverbed site
13.5.1 Stratigraphy and petrography
13.6 Stable isotope geochemistry
13.6.1 O and C isotopes
13.7 First order interpretation
13.7.1 Marbles and Carbonate mylonites
14. Sedimentary Breccias Unit
14.1 Stratigraphy and petrography
14.2 First order interpretation
14.2.1 Breccias
14.2.2 Fluid-related products
15. Discussion: Stratigraphy and Fluid flow evolution
15.1 Introduction
15.2 Data constraints on the hydrothermal features of the fluids
15.2.1 Black Dolomites and Black Limestones Units
15.2.2 The mylonites and marbles
15.2.2 Sedimentary Breccias Formation
15.3 New interpretation of the stratigraphic setting of the study area
15.4 Evolutionary model
16. Summary of the results and future perspectives
16.1 Aim of the Thesis
16.2 The Results
16.2.1 The Adriatic rifted margin
16.2.2 The Pyrenean hyper-extended rift system
16.3 Open questions and Future perspective
References