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Highland Border Ophiolite

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Journal Article

The Highland Border Ophiolite of Scotland: observations from the Highland Workshop field excursion of April 2008 Available to Purchase

W. G. Henderson, P. W. G. Tanner, R. A. Strachan
Published: 01 June 2009
Scottish Journal of Geology (2009) 45 (1): 13–18.
DOI: https://doi.org/10.1144/0036-9276/01-381
... of an obducted ophiolite. Finally, the Highland Border Ophiolite appears to have originally overlain the Southern Highland and Trossachs groups and was rotated with them by the D4 Downbend Antiform. No evidence was seen at these localities to support the hypothesis that the Highland Border Complex youngs...
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View PDF for article title, The <span class="search-highlight">Highland</span> <span class="search-highlight">Border</span> <span class="search-highlight">Ophiolite</span> of Scotland: observations from the <span class="search-highlight">Highland</span> Workshop field excursion of April 2008
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Journal Article

The role of the Highland Border Ophiolite in the ~ 470 Ma Grampian Event, Scotland Available to Purchase

P. W. G. TANNER
Published: 01 May 2007
Geological Magazine (2007) 144 (3): 597–602.
DOI: https://doi.org/10.1017/S0016756807003342
...P. W. G. TANNER Abstract Field and petrological studies of the Highland Border Ophiolite demonstrate that it was obducted onto the Neoproterozoic–Ordovician rocks of the Dalradian block, and not emplaced against them by post-orogenic strike-slip movement. It was welded onto the upper, southward...
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View PDF for article title, The role of the <span class="search-highlight">Highland</span> <span class="search-highlight">Border</span> <span class="search-highlight">Ophiolite</span> in the ~ 470 Ma Grampian Event, Scotland
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Mineral geochronology from the Highland Border ophiolite (A–C), Highland Border complex/Trossachs Group (D), Deerpark complex ophiolitic mélange (E–H), Clew Bay complex (I–J), and the Dalradian Supergroup (K–O).

Mineral geochronology from the Highland Border ophiolite (A–C), Highland Bo... Available to Purchase

Published: 01 November 2010
Figure 5. Mineral geochronology from the Highland Border ophiolite (A–C), Highland Border complex/Trossachs Group (D), Deerpark complex ophiolitic mélange (E–H), Clew Bay complex (I–J), and the Dalradian Supergroup (K–O).
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Geological setting of the Highland Border Ophiolite in Scotland. A–L, locations referred to in the text. (a) Location of the main map (boxed). (b) Locations of cross-sections I–IV. (c) True-scale cross-sections along I–IV in (b).

Geological setting of the Highland Border Ophiolite in Scotland. A–L, locat... Available to Purchase

Published: 01 May 2007
Figure 1. Geological setting of the Highland Border Ophiolite in Scotland. A–L, locations referred to in the text. (a) Location of the main map (boxed). (b) Locations of cross-sections I–IV. (c) True-scale cross-sections along I–IV in (b).
Image
Field photographs of the Old Red conglomerates and Highland Border Ophiolite from the Balmaha–Loch Lomond section with localities given in Figure 1. (a) Variably foliated to massive serpentinite with greenish serpentine fibres. The solitary serpentine is engulfed in the listvenite and jasper-rich rock unit at locality 4. (b) Outcrop of the carbonate–quartz rock locality 3, here termed listvenite. Noteworthy features are the white veins and the pitted surface showing quartz-rich domains and weathered-out carbonate, respectively. (c) Typical red jasper along the road section at locality 5. (d) Selection of common quartz–hematite–carbonate-rich cobbles from the basal Old Red conglomerates–sandstones and breccias between sampling sites 1 and 2 along the well-exposed beach section of the loch. The sampled cobbles are lying on the pebbly conglomerate–sandstones typical of the area. The red to increasingly white pebbles are interpreted to demonstrate four stages in the progressive alteration of an original ultramafic lithology, where the hematite and carbonate are progressively leached relative to the quartz as a function of the progressive alteration from an ultramafite to a quartz rock. Hammer head for scale in all photos is 19 cm long.

Field photographs of the Old Red conglomerates and Highland Border Ophiolit... Available to Purchase

Published: 19 September 2023
Fig. 2. Field photographs of the Old Red conglomerates and Highland Border Ophiolite from the Balmaha–Loch Lomond section with localities given in Figure 1 . ( a ) Variably foliated to massive serpentinite with greenish serpentine fibres. The solitary serpentine is engulfed in the listvenite
Journal Article

Timing of ophiolite obduction in the Grampian orogen Available to Purchase

David M. Chew, J. Stephen Daly, Tomas Magna, Laurence M. Page, Christopher L. Kirkland, Martin J. Whitehouse, Rebecca Lam
Journal: GSA Bulletin
Published: 01 November 2010
GSA Bulletin (2010) 122 (11-12): 1787–1799.
DOI: https://doi.org/10.1130/B30139.1
...Figure 5. Mineral geochronology from the Highland Border ophiolite (A–C), Highland Border complex/Trossachs Group (D), Deerpark complex ophiolitic mélange (E–H), Clew Bay complex (I–J), and the Dalradian Supergroup (K–O). ...
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View PDF for article title, Timing of <span class="search-highlight">ophiolite</span> obduction in the Grampian orogen
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A possible re-classification of rock units within the Highland Border Fault Zone (HFBZ), central Scotland, using BRUCS. Colours denote unit class (see Fig. 2). (a) A representation of the state of knowledge and classification within the HBFZ prior to 2007; although it did not exist at the time, the units are shown within a six-rank hierarchy for ease of comparison with (b). At that time, the Highland Border Ophiolite was a rather poorly defined unit, and the stratiform units that are complexly interleaved with it were named (as formations) but not correlated with units outside the HBFZ. The degree of geological complexity within the zone, and state of geological understanding at the time, were such that all components were united within a single parent unit denoting a complicated association, the ‘Highland Border Complex’. (b) The units of the former ‘Highland Border Complex’, re-classified using BRUCS and taking into account the improved understanding obtained through detailed re-mapping of parts of the HBFZ by Tanner and Sutherland (2007). The stratiform units are now recognized as the youngest part of the Dalradian Supergroup, and placed in a new parent group (the Trossachs Group). The Highland Border Ophiolite is classified as a tectonometamorphic unit at Rank 4, uniting numerous child units all of which are likewise classified as tectonometamorphic units. The figure shows how the Highland Border Ophiolite might, in due course, be grouped with other fragments of Iapetus Ocean ophiolite (e.g. the Ballantrae Ophiolite and Shetland Ophiolite Assemblage) within a single parent, here named the Iapetus Ocean Ophiolite Superassemblage.

A possible re-classification of rock units within the Highland Border Fault... Open Access

Published: 17 March 2021
at the time, the units are shown within a six-rank hierarchy for ease of comparison with ( b ). At that time, the Highland Border Ophiolite was a rather poorly defined unit, and the stratiform units that are complexly interleaved with it were named (as formations) but not correlated with units outside
Journal Article

The Highland Border Complex, Scotland: a paradox resolved Available to Purchase

P.W. GEOFF TANNER, STUART SUTHERLAND
Published: 01 January 2007
Journal of the Geological Society (2007) 164 (1): 111–116.
DOI: https://doi.org/10.1144/0016-76492005-188
... with the Dalradian (Grampian terrane), was overridden by the Highland Border ophiolite (Midland Valley terrane). Tectonic models for SE Laurentia are thereby considerably simplified. 23 3 2006 21 12 2005 © 2007 The Geological Society of London 2007 The Highland Border Complex in Scotland occurs...
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Journal Article

Tectonic significance of the Highland Boundary Fault, Scotland Available to Purchase

GEOFF TANNER
Published: 01 September 2008
Journal of the Geological Society (2008) 165 (5): 915–921.
DOI: https://doi.org/10.1144/0016-76492008-012
... for >240 km and defines the northern margin of the Midland Valley. Except for small outliers of Late Palaeozoic rocks on the NW side, it separates the Highland Border Ophiolite and Dalradian rocks of Neoproterozoic–Early Ordovician age (Grampian terrane) to the NW from Late Silurian–Early Carboniferous...
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Stratigraphic columns for the Cambro-Ordovician succession in the Hebridean foreland and for the Trossachs Group and Highland Border Ophiolite along the Highland Boundary Fault. Analysed samples shown by numbered triangles. Unnumbered triangles refer to stratigraphic position of samples from the Hebridean foreland analysed by Cawood et al. (2007b). Asterisks indicate fossil locations in the Trossachs Group and Highland Border Ophiolite. The Ardvreck Group varies in thickness from 85 to 150 m; the Salterella Grit is generally no more than 20 m thick (Park et al. 2002). The thickness of the Trossachs Group is difficult to establish given its tectonically segmented nature in the vicinity of the Highland Boundary Fault. In no single section does the succession exceed 900 m in thickness, but the cumulative thickness may well be several kilometres (Tanner &amp; Sutherland 2007).

Stratigraphic columns for the Cambro-Ordovician succession in the Hebridean... Available to Purchase

Published: 01 September 2012
Fig. 3. Stratigraphic columns for the Cambro-Ordovician succession in the Hebridean foreland and for the Trossachs Group and Highland Border Ophiolite along the Highland Boundary Fault. Analysed samples shown by numbered triangles. Unnumbered triangles refer to stratigraphic position of samples
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 Locality map for the Highland Border Complex, Scotland. Inset shows the stratigraphical succession proposed here, which comprises the Trossachs Group, Highland Border Ophiolite and the Garron Point Group on this figure.

Locality map for the Highland Border Complex, Scotland. Inset shows the str... Available to Purchase

Published: 01 January 2007
Fig. 1.  Locality map for the Highland Border Complex, Scotland. Inset shows the stratigraphical succession proposed here, which comprises the Trossachs Group, Highland Border Ophiolite and the Garron Point Group on this figure.
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Photomicrographs of the samples of the Highland Border Complex selected for zircon analysis, taken under CN. (For location, see Fig. 2) (a) A266. (Meta-)sub-litharenite from the Highland Border Ophiolite in the Loch Ard Forest. (b) A265. (Meta-)feldspathic arenite, from the Southern Highland Group–Trossachs Group transition in the Loch Ard Forest. (c) A472. (Meta-)feldspathic arenite, Lower Keltie Water Formation in Leny Quarry, Callander. (d) NE148. (Meta-)calc-quartz arenite, from adjacent to the Margie Limestone in the River North Esk section.

Photomicrographs of the samples of the Highland Border Complex selected for... Available to Purchase

Published: 01 September 2012
Fig. 4. Photomicrographs of the samples of the Highland Border Complex selected for zircon analysis, taken under CN. (For location, see Fig. 2 ) ( a ) A266. (Meta-)sub-litharenite from the Highland Border Ophiolite in the Loch Ard Forest. ( b ) A265. (Meta-)feldspathic arenite, from the Southern
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(a) Reconstruction of the Laurentian margin at c. 480 Ma showing geometry of the margin, the Dalradian continental margin, the Highland Border ophiolite suites, and the Midland Valley arc, after Chew et al. (2010). (b) Reconstruction of the Indian plate continental margin in the western Himalaya, showing the geometry of similar thrust sheets related to obduction of the Late Cretaceous Sapat ophiolite, accretion of the large-scale Kohistan island arc, with suture zone rocks along both margins; after Searle (2015).

(a) Reconstruction of the Laurentian margin at c . 480 Ma showing geometry... Available to Purchase

Published: 15 October 2021
Fig. 10. (a) Reconstruction of the Laurentian margin at c . 480 Ma showing geometry of the margin, the Dalradian continental margin, the Highland Border ophiolite suites, and the Midland Valley arc, after Chew et al . ( 2010 ). (b) Reconstruction of the Indian plate continental margin
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(a, c, d, f) Schematic, non-scaled, vertical sections through the base of the Highland Border Ophiolite at localities A–D, Figure 1. (b, e, f) Equal-area stereographic projections of data from three localities. A colour version of this figure is available from the author on request, or online at GEOROC (http://georoc.mpch-mainz.gwdg.de/georoc/).

(a, c, d, f) Schematic, non-scaled, vertical sections through the base of t... Available to Purchase

Published: 01 May 2007
Figure 2. (a, c, d, f) Schematic, non-scaled, vertical sections through the base of the Highland Border Ophiolite at localities A–D, Figure 1 . (b, e, f) Equal-area stereographic projections of data from three localities. A colour version of this figure is available from the author on request
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Probability density distribution diagram of siliciclastic sequences from the Caledonian orogen in Scotland and northern England. Sources of data: Ardvreck Group, Hebridean foreland, Cawood et al. (2007b) and this paper (SG07); Argyll Group, Cawood et al. (2003); Southern Highland Group (Green Beds), Cawood et al. (2003); Trossachs Group, this paper (samples A265, A472, NE148) and Cawood et al. (2003); Highland Border Ophiolite, this paper; Midland Valley terrane, Phillips et al. (2009); Southern Uplands terrane, Waldron et al. (2008). n, number of analyses; S, number of samples.

Probability density distribution diagram of siliciclastic sequences from th... Available to Purchase

Published: 01 September 2012
Highland Group (Green Beds), Cawood et al . (2003) ; Trossachs Group, this paper (samples A265, A472, NE148) and Cawood et al . (2003) ; Highland Border Ophiolite, this paper; Midland Valley terrane, Phillips et al . (2009) ; Southern Uplands terrane, Waldron et al . (2008) . n, number of analyses
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Tera-Wasserburg concordia diagrams, scanning electron micrograph cathodoluminescence (SEM-CL) images, and Lu-Hf isotopic analyses of zircon from the Highland Border ophiolite on Bute. Spot numbers are those used in the corresponding data table. (A) Tera-Wasserburg concordia diagrams, sample DC 8–2-6. (B) SEM-CL images, sample DC 8–2-6. (C) Tera-Wasserburg concordia diagram, sample DC 8–2-8. (D) SEM-CL images, sample DC 8–2-8. (E) Lu-Hf isotopic analyses of zircon, sample DC 8–2-8. (F) εHf(490 Ma) probability distribution diagram for sample DC 8–2-8. MSWD—mean square of weighted deviates.

Tera-Wasserburg concordia diagrams, scanning electron micrograph cathodolum... Available to Purchase

Published: 01 November 2010
Figure 4. Tera-Wasserburg concordia diagrams, scanning electron micrograph cathodoluminescence (SEM-CL) images, and Lu-Hf isotopic analyses of zircon from the Highland Border ophiolite on Bute. Spot numbers are those used in the corresponding data table. (A) Tera-Wasserburg concordia diagrams
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Damage zone deformation of the HBF. (a) Field photograph of the HBF at the northern end of Craigeven Bay looking NE [grid reference NO 8870 8740]. (b) Stereographic projection of poles to Dalradian bedding showing the mean bedding planes and the interpreted fold axis (Kamb contours of interval 2σ and confidence level 3). (c) Stereographic projection of field data on small faults associated with the HBF consistent with strike-slip faulting. Poles to all faults in the Highland Border Ophiolite and the mean planes of sinistral, dextral and thrust faults can be interpreted within the framework of a strike-slip strain ellipse for sinistral motion of the HBF (separated based on kinematic markers in the field). Mean planes were determined from contour maps. There are numerous faults where the sense of motion cannot be determined (unfilled); however, they are not outliers and can be grouped into one of the three sets. The principal stress axes are inferred from kinematic data. (d) Ideal strike-slip strain ellipse for comparison, assuming symmetry of the Reidel shears around a fault with the same dip as the HBF and pure strike-slip. All stereonet plots were created using Stereonet 10 software.

Damage zone deformation of the HBF. ( a ) Field photograph of the HBF at th... Available to Purchase

Published: 22 November 2019
of interval 2σ and confidence level 3). ( c ) Stereographic projection of field data on small faults associated with the HBF consistent with strike-slip faulting. Poles to all faults in the Highland Border Ophiolite and the mean planes of sinistral, dextral and thrust faults can be interpreted within
Journal Article

Extreme enrichment of arsenic and antimony during alteration of serpentinized peridotites to form listvenite-like dolomite–quartz rocks and Ni–Cr-rich jasper and quartzites in the Highland Border Complex of Scotland Available to Purchase

Håkon Austrheim, Torgeir B. Andersen
Published: 19 September 2023
Journal of the Geological Society (2023) 180 (5): jgs2023-054.
DOI: https://doi.org/10.1144/jgs2023-054
...Fig. 2. Field photographs of the Old Red conglomerates and Highland Border Ophiolite from the Balmaha–Loch Lomond section with localities given in Figure 1 . ( a ) Variably foliated to massive serpentinite with greenish serpentine fibres. The solitary serpentine is engulfed in the listvenite...
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View PDF for article title, Extreme enrichment of arsenic and antimony during alteration of serpentinized peridotites to form listvenite-like dolomite–quartz rocks and Ni–Cr-rich jasper and quartzites in the <span class="search-highlight">Highland</span> <span class="search-highlight">Border</span> Complex of Scotland
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Journal Article

The Highland Boundary Fault and the Highland Border Complex Available to Purchase

B. J. Bluck
Published: 01 November 2010
Scottish Journal of Geology (2010) 46 (2): 113–124.
DOI: https://doi.org/10.1144/0036-9276/01-411
...B. J. Bluck Abstract Synopsis Stratigraphic evidence, petrography and way up criteria are presented to show that the bulk of the Highland Border Complex in Scotland gets younger to the NW, towards the largely Neoproterozoic, Dalradian block. An early ophiolite has fed younger sediments...
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View PDF for article title, The <span class="search-highlight">Highland</span> Boundary Fault and the <span class="search-highlight">Highland</span> <span class="search-highlight">Border</span> Complex
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Detailed internal structure and along-strike variability of the core of a plate boundary fault: the Highland Boundary fault, Scotland Available to Purchase

Lucy McKay, Zoe K. Shipton, Rebecca J. Lunn, Billy Andrews, Timothy D. Raub, Adrian J. Boyce
Published: 22 November 2019
Journal of the Geological Society (2020) 177 (2): 283–296.
DOI: https://doi.org/10.1144/jgs2018-226
... of interval 2σ and confidence level 3). ( c ) Stereographic projection of field data on small faults associated with the HBF consistent with strike-slip faulting. Poles to all faults in the Highland Border Ophiolite and the mean planes of sinistral, dextral and thrust faults can be interpreted within...
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View PDF for article title, Detailed internal structure and along-strike variability of the core of a plate boundary fault: the <span class="search-highlight">Highland</span> Boundary fault, Scotland
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