Kinematic stratification in the hinterland of the central Scandinavian Caledonides

Gilotti, Jane A.; Hull, Joseph

doi:10.1016/0191-8141(93)90152-z

Cited by 22 publications

(26 citation statements)

References 37 publications

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“…Folds with hinge lines parallel to the inferred direction of tectonic transport have been observed in many orogenic belts, e.g., the Caledonides (Fossen, 1993;Gillotti and Hull, 1993), the Appalachians (Bryant and Read, 1969), and the metamorphic core complexes in western North America (Fletcher and Bartley, 1994). In domains I, IIa, and IIb in the pre-Tertiary metamorphic basement, the hinge lines of mesoscale folds trend subparallel to the mean orientation of the L1 lineation (Fig.…”

Section: Qualitative Strain Analysismentioning

confidence: 92%

“…Transpression is commonly manifested at shallow structural levels by coeval thrust and strike-slip faults, the thrust faults accommodating the component of motion oriented orthogonal to the plate margin and the strike-slip faults accommodating the component of motion oriented parallel to the plate margin (Mount and Suppe, 1987;Oldow et al, 1990;McCaffrey, 1992). The understanding of transpressional deformation at deep structural levels has advanced through two types of studies: (1) forward modeling of finite strain and strain paths using specific boundary conditions (Sanderson and Marchini, 1984;Robin and Cruden, 1994;Tikoff and Teyssier, 1994;Teyssier et al, 1995;Jones et al, 1997;Fossen and Tikoff, 1998;Teyssier and Tikoff, 1999) and (2) structural analysis of deeply eroded, ancient margins for which the boundary conditions are poorly known (Gillotti and Hull, 1993;Dias and Ribeiro, 1994;Wallis, 1995;Northrup and Burchfiel, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Lateral extrusion in a transpressional collision zone: An example from the pre-Tertiary metamorphic basement of Taiwan

Pulver¹,

Crespi²,

Byrne³

2002

Geology and Geophysics of an Arc-Continent Collision, Taiwan

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Analysis of the geometry and kinematics of structural fabrics in the pre-Tertiary metamorphic basement of east-central Taiwan provides evidence for transpression and lateral extrusion during oblique collision. Four structural domains are recognized on the basis of systematic variations in the dip direction of S1 and the trend of L1. Domains I, IIa, and IIb contain a northeast-striking S1 and a northeast-or southwestplunging L1, raking 30Њ-45Њ on S1. In contrast, domain III, at the western edge of the pre-Tertiary metamorphic basement, has an approximately downdip L1, similar to the Slate Belt. Microscale kinematic indicators from domains I, IIa, and IIb yield a consistent, left-lateral, strike-slip component of oblique motion. Analyses of microstructures in the Chipan granitic gneiss in domain I and the geometry of mesoscale folds in phyllitic rocks in domain IIa provide qualitative evidence for constrictional strain. Evaluation of potential primary configurations of structural domains, combined with geologic and tectonic information, suggests that the pre-Tertiary metamorphic basement and the Slate Belt formed as a southeast-dipping package; post-S1 block rotation of domain IIa is interpreted to have produced the present arrangement of domains. The pre-Tertiary metamorphic basement was deformed within a zone of left-lateral transpression. The shallow plunge of the L1 lineation and the evidence for constrictional strain in domains I, IIa, and IIb suggest that the orogenperpendicular component of oblique convergence was accommodated by lateral extrusion. Significant vertical thickening may have been prevented by the presence of a shallowly east-dipping rigid arc lid overlying the pre-Tertiary metamorphic basement.

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Section: Qualitative Strain Analysismentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Lateral extrusion in a transpressional collision zone: An example from the pre-Tertiary metamorphic basement of Taiwan

Pulver¹,

Crespi²,

Byrne³

2002

Geology and Geophysics of an Arc-Continent Collision, Taiwan

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“…North of the Møre-Trøndelag Fault Complex, amphibolitefacies Palaeoproterozoic orthogneisses, correlated with the Western Gneiss Region, crop out in the Central Norway basement window (Gilotti & Hull 1993;Braathen et al 2000) together with infolded supracrustal rocks (Fig. 1b).…”

Section: Geological Settingmentioning

confidence: 99%

“…Folds of this type are numerous on the outcrop as well as at map scale. On the regional scale, these folds deform the entire Central Norway basement window in the area between the Høybakken and Kollstraumen detachments (Roberts 1983;Piasecki & Cliff 1988;Gilotti & Hull 1993;Braathen et al 2000;Nordgulen et al 2002), and the axes of mesoscopic folds commonly contribute to the 'L'-element of the LS-fabrics in the window, including the detachment mylonites. NE-SW-trending folds also deform the 'Old Red' basins above the Høybakken detachment zone ( Fig.…”

Section: The Footwallmentioning

confidence: 99%

“…1b and c) and dated at c. 432 Ma (Rb-Sr whole-rock age, Dallmeyer et al 1992). The Central Norway basement window is folded into NE-SW-trending, upright folds that are subparallel to the Møre-Trøndelag Fault Complex and to a stretching lineation that is variably developed in the orthogneisses and supracrustal rocks (Piasecki & Cliff 1988;Gilotti & Hull 1993;Braathen et al 2000). In the NE, the Central Norway basement window is flanked by the top-to-the-ENE Kollstraumen detachment, which juxtaposes the Central Norway basement window with rocks of the Upper and Uppermost Allochthons (Braathen et al 2000;Nordgulen et al 2002).…”

Section: Geological Settingmentioning

confidence: 99%

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Kinematics of the Høybakken detachment zone and the Møre–Trøndelag Fault Complex, central Norway

Osmundsen

Eide

Haabesland

et al. 2006

JGS

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The tectonic disintegration of the Caledonian orogen through combined extension, contraction and strike-slip was characterized by spatial and temporal strain partitioning through a period of at least 30 Ma. Early to Mid-Devonian exhumation of the Central Norway basement window was associated with retrograde, top-to-the-SW extensional shearing in the Høybakken detachment zone, sinistral shearing along the Møre-Trøndelag Fault Complex, and formation of extension-parallel folds. Progressive exhumation led to increasing strain localization and to the transition from ductile to brittle deformation. In the interval between c. 370 and 320 Ma, the Høybakken detachment fault cut previously folded detachment mylonites, capturing mylonites in its hanging wall. 40 Ar/ 39 Ar mica and K-feldspar ages indicate a Late Devonian or younger age for the uppermost parts of the adjacent 'Old Red' basin. Gentle folding of this stratigraphic level attests to the continuation of shortening and orogen-oblique extension into Late Devonian-Carboniferous time. Shortening was intensified along strands of the Møre-Trøndelag Fault Complex, as shown by mutually cross-cutting reverse and strike-slip faults. 'Flower structures' may be particularly common in constrictional strain systems where strike-slip faults develop parallel to the principal elongation trend, but normal to the principal axis of shortening.

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Complex deep seismic anisotropy below the Scandinavian Mountains

Roy

Ritter

2012

J Seismol

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Kinematic stratification in the hinterland of the central Scandinavian Caledonides

Cited by 22 publications

References 37 publications

Lateral extrusion in a transpressional collision zone: An example from the pre-Tertiary metamorphic basement of Taiwan

Lateral extrusion in a transpressional collision zone: An example from the pre-Tertiary metamorphic basement of Taiwan

Kinematics of the Høybakken detachment zone and the Møre–Trøndelag Fault Complex, central Norway

Complex deep seismic anisotropy below the Scandinavian Mountains

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