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Loch Borralan Intrusion

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Journal Article
Published: 01 December 1994
Journal of the Geological Society (1994) 151 (6): 945–954.
...B. N. YOUNG; I. PARSONS; R. THREADGOULD Abstract A suite of intrusive carbonate rocks, some containing xenoliths of nepheline syenite and Durness Group dolomite, has been discovered near the shore of Loch Urigill, Assynt, Scotland, c . 400m outside the contact of the strongly alkaline Loch Borralan...
Journal Article
Published: 24 November 2020
The Canadian Mineralogist (2020) 58 (5): 597–623.
...Rebekka Reich; Michael A. W. Marks; Thomas Wenzel; Gregor Markl ABSTRACT The alkaline Loch Borralan intrusion (Assynt Region, NW Highlands of Scotland) consists of a composite arrangement of several ultramafic to felsic plutonic rock bodies which were emplaced around 430 Ma into the Moine Thrust...
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Journal Article
Published: 01 August 1987
Journal of the Geological Society (1987) 144 (4): 611–617.
.... The emplacement of intrusives in Assynt overlapped the thrust movements and new U-Pb zircon ages for the Loch Ailsh intrusion (439 ± 4 Ma) provide are liable bracket, when combined with existing age data for the Loch Borralan intrusion (430 ± 4 Ma), for the main movements on the Ben More thrust plane. A detailed...
Journal Article
Published: 01 January 1965
Geological Magazine (1965) 102 (1): 46–58.
... is a stratified laccolith. Rather than a low-angle structure, the intrusion is a steeply dipping sheet at the contact between syenite and limestone country rock. By analogy, similar locally developed anomalies along the southern margin of the Loch Borralan complex are interpreted as due to steeply dipping rocks...
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP335.18
EISBN: 9781862395831
... In the southern part of the Assynt culmination two large alkaline intrusions, the Loch Ailsh and Borralan intrusions, have been mapped within the Moine Thrust zone (Fig.  3 ). The Loch Ailsh and Borralan plutons are both composite igneous bodies made up of marginal biotite pyroxenites, earlier...
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Journal Article
Published: 01 April 1990
Journal of the Geological Society (1990) 147 (2): 259–269.
...M. F. THIRLWALL; P. BURNARD Abstract Pb–Sr–Nd isotope and major and trace element data are reported for a suite of samples from the Siluro–Ordovician Loch Borralan pluton, NW Scotland. Rock types ranging from pyroxenite through highly potassic melasyenites to quartz syenite were primarily generated...
Journal Article
Published: 22 February 2013
Geological Magazine (2013) 150 (5): 783–800.
... of the NW Highlands alkaline plutonic suite, comprising volumetrically small yet highly variable alkaline intrusions of Caledonian age that occur along, and on both sides of, the Moine Thrust Zone. This suite also includes intrusions at Loch Borralan and Loch Ailsh in Assynt...
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Journal Article
Published: 01 January 2011
Journal of the Geological Society (2011) 168 (1): 99–114.
... of the youngest intrusions, the late suite of the Loch Borralan Pluton, at 429.2 ± 0.5 Ma, and the Loch Loyal Syenite Complex. A broadly foreland-propagating sequence of thrusting is indicated by the way in which the structurally highest thrusts are folded by the development of duplexes in their footwalls...
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Journal Article
Published: 01 February 1999
Journal of the Geological Society (1999) 156 (1): 163–175.
... by the Geological Survey at the end of the nineteenth century (e.g. Peach et al. 1889). Most early accounts (e.g. Read 1931, 1934; Phemister 163 1948) focused on the obvious petrographical similarity of the Loch Loyal intrusions with the Caledonian alkaline igneous complexes in Assynt (Loch Ailsh, Loch Borralan...
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP335.26
EISBN: 9781862395831
... between major brittle thrusts and alkaline intrusions, including the Canisp quartz-microsyenite, and the Loch Borralan and Loch Ailsh intrusions (see Searle et al. 2010 and references therein). The Canisp Porphyry sills, which are observed beneath the Sole thrust but not in the thrust belt, have been...
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Journal Article
Published: 01 August 2015
Mineralogical Magazine (2015) 79 (4): 877–907.
... Loch Roag. Given the relative proximity of a suite of late-Caledonian (~430–420 Ma) high Ba-Sr mixed diorite-granitoid, syenite and pyroxenite-syenite intrusions in northern Scotland (for example at Loch Borralan, Loch Loyal, Helmsdale, Rogart and Ach’ Uaine) and especially accounting for Caledonian...
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Journal Article
Published: 16 December 2013
Geological Magazine (2014) 151 (5): 899–915.
... to a NW-trending lineament termed the Loch Shin Line, which is defined by a concentration of late Caledonian minor intrusions with mantle parentage (Watson, 1984 ). The Strath Fleet Fault has been interpreted as an anti-Riedel shear to the late Caledonian sinistral Great...
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Image
Total alkalis  vs.  silica diagram for the Assynt minor <b>intrusions</b>. Data fo...
Published: 01 August 2004
F ig . 3. Total alkalis vs. silica diagram for the Assynt minor intrusions. Data for minor intrusion swarms from Young (1989) and Tables 2 and 3 . Data for Loch Borralan syenites from Thirlwall and Burnard (1990) . Classification fields from Gillespie and Styles (1999) after Le Bas et
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2010
DOI: 10.1144/SP335.16
EISBN: 9781862395831
... Thrust in the west, to Glen Oykel in the east where it is overlain by the Ben More Thrust (Figs  5 b, c & 6 ). In the north, the Traligill Thrust ( Tr on Fig.  6 ) forms a convenient boundary, while in the south the system appears to be truncated by the Loch Borralan Pluton in an area of poor...
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Journal Article
Published: 01 October 2017
Mineralogical Magazine (2017) 81 (5): 1261–1277.
... ., 2011 ); Loch Borralan, Scotland and Latium, Italy (Della Ventura et al ., 2007 ); Ilmeny and Vishnevye Mountains, Urals, Russia ( Hassan and Grundy, 1984 ; Della Ventura et al ., 2007 ; Chukanov et al ., 2011 ; Pekov et al ., 2011 ); Dakhunur and Bayankol, Tuva, Russia ( Reshetnyak et al...
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Journal Article
Published: 01 August 2004
Mineralogical Magazine (2004) 68 (4): 541–559.
...F ig . 3. Total alkalis vs. silica diagram for the Assynt minor intrusions. Data for minor intrusion swarms from Young (1989) and Tables 2 and 3 . Data for Loch Borralan syenites from Thirlwall and Burnard (1990) . Classification fields from Gillespie and Styles (1999) after Le Bas et...
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Journal Article
Published: 01 November 2010
Geochemistry: Exploration, Environment, Analysis (2010) 10 (4): 391–399.
... occurrences are known elsewhere in Canada. Commonly, Cr-free andradite (Ca 3 Fe 2 SiO 4 ) occurs as a late - stage mineral in some altered mafic intrusions such as the East Bull Lake complex, Ontario ( Kamineni 1986 ) and the Loch Borralan complex, Scotland ( Styles et al . 2004 ). Such andradite...
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Journal Article
Published: 01 October 2002
The Canadian Mineralogist (2002) 40 (5): 1347–1374.
... the ultramafic suites ( cf. Table 1 , anal. 5–7), The representative compositions of the Afrikanda diopside are shown in Figure 2 , and compared with clinopyroxene from other occurrences. The compositions of the pale green crystals are closest to diopside from the Maimecha–Kotuy phoscorites and Loch Borralan...
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Image
Simplified geological map of the Northern Highlands, showing the main struc...
Published: 01 January 2011
Fig. 1. Simplified geological map of the Northern Highlands, showing the main structures and intrusions. Major thrusts: MT, Moine Thrust; BHT, Ben Hope Thrust; NT, Naver Thrust; SBT, Sgurr Beag Thrust. Alkaline plutons: GDP, Glen Dessarry Pluton; LBP, Loch Borralan Pluton; LAP, Loch Ailsh Pluton
Image
Schematic sketch illustrating the hypotheses for the genesis of the early s...
Published: 24 November 2020
of the Loch Borralan pluton: (1) Fractional crystallization with the formation of a layered intrusion. Pseudoleucite could form a flotation cumulate if the difference in density between crystals and crystal mush was high enough. (2) Fractional crystallization caused by an input of new melt batches, resulting