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| com/locate/pgeola The Dalradian rocks of the Shetland Islands, Scotland Derek Flinn a,1, Philip Stone b, David...rocks to the east of the Walls Boundary Fault on Shetland have lithological similarities to those of the...the Appin Group and the Argyll Group of mainland Scotland. Metavolcanic rocks within the deeper water turbiditic...coeval with those of the Southern Highland Group of Scotland. Beyond that, correlations with the established...west side of Unst, having been folded around the tight Valla Field Anticline. The Shetland Ophiolite-complex |
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| Geochemistry of the Metamorphic Rocks of Unst and Fetlar, Shetland by DEREK FLINN Received 8 January 1970...BLOCKS ROCKS AFFECTED BY THE THIRD METAMORPHISM OF UNST OTHER ROCKS SUMMARY... ACKNOWLEDGMENTS REFERENCES...526 ABSTRACT: Forty-three analyses of rocks from Unst and Fetlar are presented, nine of which have not...mass which occupies the largest part of the two islands. This igneous mass is well known from the work...along the main dislocations which traverse the islands. It is argued that changes in composition may have |
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| ENVIRONMENT RESEARCH COUNCIL of Unst and Fetlar in Shetland Geopark Shetland Tectonostratigraphical succession...succession and Quaternary sequence on Unst and Fetlar, Shetland. Landslides Blown sand Peat Alluvial diatomite...UNCONFORMITY Tectonostrati!!raohical succession on Unst and Fetlar Silurian to Devonian Silurian Minor...Silurian Late Cambrian to Silurian Cambrian Shetland OphioliteComplex Cambrian Metaharzburgite Layer...Silurian Norwick Graphitic Schist Norwick Phyllite Unst Phyllite Group Leagarth Phyllite original stratigraphical |
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| on the Petrology of the Saxa Vord Schists of Unst, Shetland Isles By N. J. SNELLING ABSTRACT The polymetamorphism...available. INTRODUCTION HE geology and petrology of Unst have been thoroughly described by Read (1934,1937)...grain of andalusite was observed. Relic grains of staurolite are very common, the mineral is full of quartz...replacing staurolite but laths of chloritoid commonly sprout from relic grains of staurolite. Garnet is... Petrology of the Saxa Vord Schists of Unst 51 and staurolite, indicating that the chlorite-schist had |
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| Polymetamorphic Rocks of the Valla Field Block, Unst, Shetland Islands. By H. H. Read, D.Sc, A.K.C.Sc, George...account (Eead, 1935) of the metamorphic geology of Unst, in the Shetlands, I have shown that the island...rocks containing them. In polymetamorphism of the Unst type, the minerals cannot be considered apart from...the first metamorphic episode, that in which staurolite, kyanite, and garnet were formed in the pelitic...—Geological Map of the Valla Field Block, Unst, and, inset, the Unst Dislocations. gneisses and permeation-gneisses |
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| during quartz-kyanite vein formation, Unst, Shetland Islands, Scotland C. E. BUCHOLZ AND J. J. AGUE Department...the Dalradian Saxa Vord Pelite of Unst in the Shetland Islands (Scotland) were investigated to constrain...chlorite+chloritoid+kyanite, chlorite+chloritoid+staurolite and garnet+staurolite+kyanite+chloritoid. These assemblages...fluid flow; high-P metamorphism; mass transfer; Scotland; veins. INTRODUCTION Aluminium is the third...north-east corner of the Island of Unst in the Shetland Islands (Scotland; Fig. 1) contains numerous syn-metamorphic |
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| 317 On quartz-kyanite-rocks in Unst, Shetland Islands, and their bearing on metamorphic differentiation...relationships been considered. During the mapping of Unst for the Geological Survey, opportunity was afforded...of the Unst rocks, and the second with more general aspects. I. Quartz-kyanite-rocksof Unst. The Country-rocks...Country-rocks.--The north-eastern part of Unst is composed of chloritoid-kyanite-schists. These form the...mineralogy of Scotland. Min. Mag., 1879, vol. 2, p. 19 ; and The mineralogy of Scotland, 1901, vol. 2 |
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| Pl:ite I Weisdalc Voc. Shetland Mainland, looking south across inshore islands to the Clift Hills and...SCIENCES !British Regional Geology rlShetland By W. Mykura, B.Sc., F.R.S.E. with Contributions...one of the Shetland maps being either published or in press. The remaining Central Shetland map will shortly...memoir coverage will be available for the Shetland Islands. Accordingly, although this Handbook covers...work of the original surveyors. For the Orkney Islands their names are fully acknowledged in the maps |
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| A SURVEY OF THE AGE RELATIONS OF SHETLAND ROCKS JOHN A. MILLER AND DEREK FLINN The survey is based on...by Miller, and on previously published work on Shetland. Most of the metamorphic rocks give K-Ar ages...related to a late porphyroblast metamorphism: in Unst and Fetlar it seems to be the age of Read's second...complexes were emplaced in the southern part of Shetland. By 380 m.y. ago erosion had reached mipatitic...Devonian times, granites were emplaced in the west of Shetland cutting the Old Red rocks. Finally the Walls Boundary |
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| METAMORPHIC HISTORY OF SHETLAND. THE UNST, By Professor H. H. READ, D.Se. , A.R.C .S., F .G.S. [W...CONCLUSION.. 293 REFERENCES 293 I. INTRODUCTION. UNST, the most northerly of the Shetlands, provides an...arisen that require answers-so that this one small Shetland island will repay investigation for generations...prodlU:ed by FIG. 53.-GEOLOGICAL SKETCH-MAP OF UNST. P.,,,,wio,, of 1111 CoNtoller of H.M. SIaJ~ Office...' Pari I., p. 66.} 0' METAMORPHIC JIlSTORY OF UNST, SHETLAXD. 285 mately of the same age. Under compression |
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| III.--The County Geognosy and Mineralogy of Scotland. :BY PRO~ESSOR HEDnLv,. ~PREFACE. of this work...part from Professor Geikie's Geological Map of Scotland, ~ is appended in most cases. Mineral localities...practicable to collect minerals in Shetland and the Western Islands with either success or comfort, in...UNKNOWN. Try. 6hd. TRAVELLEI~S' GUIDE T H R O U G H SCOTLAND ~ 1~hemineralogical notices in which were written...F. G.&L. 12 PROYESSOR HEDDLE 0N ORKNEY AND SHETLAND. ISLAND o7 Uns~. Geognostie features. have been |
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| 27 0 THE GEOLOGY OF THE ORKNEY AND SHETLAND ISLANDS,I By G. V. WILSON, B.Sc., F.G.S., and ]. KNOX, B...II. III. IV. INTRODUCTION THE ORKNEY ISLANDS THE SHETLAND ISLANDS REFERENCES 27° .. 27° .. 274 .. 281-2...interesting geological features of the Orkneys and Shetland and to describe in some detail the various districts...meeting. For further information about the Orkney Islands the reader is referred to the various papers by...maps and memoir. With regard to the geology of Shetland there are no official publications except for |
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| necessary to emphasize two important reactions: 3 Staurolite + 2 Quartz ^ Almandine + 5 Al2SiO5 + 3 Water...the almandine zone, as in the Saxa Vord Group of Unst (Read, 1934, p. 660). Kyanite, quartz, and chloritoid...assemblage. They evidently replace the pair andalusite-staurolite which probably crystallized at higher temperatures...is replaced by staurolite in up to three ways: 5 Kyanite + 4 Chloritoid ^ 2 Staurolite 4- Silica + 3 Water...Chloritoid ^ 2 Staurolite + Silica + 5 Ferrous Oxide + 8 Water (2) Chloritoid + Quartz ^ Staurolite + Garnet |
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| of polymetamorphism, such as the W Highlands of Scotland, this method will result in an interference pattern...southwest of the garnet zone the rocks rise to the staurolite-kyanite zone (Pitcher et al. 1964). Southwards...grade rises from greenschist in the south to staurolite-kyanite assemblages in the north. Within the...facies groups can be determined, amphibolite (staurolite-kyanite) and greenschist (Yardley et al. this...schists typically contain garnet, staurolite and sillimanite. In Shetland, west of the Walls boundary fault |
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| talc, actinolite, chlorite, and biotite in Unst, Shetland Islands. By H. H. READ, D.Sc. Professor of Geology...Survey in 1930 of the metamorphic rocks of western Unst, numerous small masses were encountered that were...must have been from occurrences similar to these in Unst that M. F. Heddle obtained his fine examples of...minerals from the Hillswick area of the mainland of Shetland. It is the purpose of this communication to describe...belt of the eastern United States. The study of the Unst occurrences throws light not only upon the origin |
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| Sciences Experimental Cartography Unit Highlands and Islands Unit, Institute of Geological Sciences , • ,...industrial contamination. The atla:s of the Shetland Islands is the first of the series to be published...modern compilation prepared by the Highlands and Islands Unit, and detailed stream and river patterns and...on data in the EC U's experimental 'Ecobase' of Shetland and includes relevant supporting maps of relief...W. Mykura :and Dr Fo May of the Highlands and Islands Unit Institute of Geological Sciences, Edinburgh |
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| A Bowl-like Object of Aragonite-Limestone from Shetland Waters by P. A. SABINE, with a Report on the Fauna...bowl-like object recovered from the sea-bed off Shetland at approximately 60" 30' N .• 0" 55' W. under...similar or have a bearing on the origin of the Shetland 'bowl'. There is some evidence of recrystallisation...calcareous mud off a metamorphic terrain (which Shetland is), may be the relic of a solution pipe, perhaps...Whalsay, approximately 5 kilometres east of Yell, Shetland. The approximate location is 60° 30' N., 0° 55' |
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| London. B a s e m e n t - c o v e r relations in Shetland Derek Flinn, P. L. Frank, Maureen Brook & I. R...cover can be studied in two places in Shetland. In NW Shetland, orthogneisses with a minimum age of 2900...interpreted as including the Caledonian front. In NE Shetland, two nappes of ultramafic and basic rocks, one...occurrence forms a typical obducted ophiolite complex. Shetland is an inlier of igneous and metamorphic rocks...rocks in Scotland and about 300 km west of the nearest metamorphic rocks of Norway. Thus Shetland is the |
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| .................. Diary of a Trip to the Shetland Islands Roy Starkey 44 .............................was one, specialising in stamps from the Channel Islands but perhaps, more closely associated with minerals...Lepidocrocite from Louchentyre Copper Mine, Dumfreisshire, Scotland. Oh, don't you just love those erratic pebbles...Department for Education and Employment 0800 917 8185 Scotland: Fiona Aitken 01786 479 593 Wales: Alun Taylor...worn boulder of Lewisian Gneiss from North West Scotland and this competition was won by Peter FitzGerald |
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| highly aluminous with considerably more kyanite, staurolite, and garnet, and less quartz, plagioclase, and... Zn, and Li were sequestered into staurolite. Kyanite, staurolite, and garnet growth resulted in Al mass...biotite-garnet zone, and finally to the highest-grade staurolite-kyanite zone rocks in the west (Fig. 1). Metamorphic...Ague, Figure 2 chlorite zone to 20–30% in the staurolite-kyanite zone (Ague 1994b). They were among the...Note coarse grain size of kyanite, garnet, and staurolite adjacent to vein in selvage. Pen cap lies along |
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| calciferous sandstone basalt lavas in one district of Scotland. The zoning is classified as (a) normal, (b) simple...chlorite, and biotite in Unst, Shetland Islands. In an injection zone within the staurolite-kyanite-garnet-gneisses...neisses of western Unst occur spherical or ellipsoidal bodies, up to 20 ft. diameter, composed of an...chlorite-producing metamorphisms that have affected the staurolite-kyanite-garnet-gneisses. Mr. M. H. Hey and Mr |
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| Petrographic Notes on Three Rock-types from the Shetland Islands. By F. COLES PHILLIPS, M.A., Ph.D., F.G...author commenced petrological work in the -1 Shetland Islands, and two communications dealing with different...Its apparent continuation forms the now isolated islands of Hildasay, Cheynies, Oxna, and Papa. Very little...attaining a length of 2 mm. Rocks of the Shetland Islands. 501 It shows a zonary growth, sometimes...mineral of epidote-bearing granite, Hildasay, Shetland. a. Section highly inclined to the optic axis |
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| calciferous sandstone basalt lavas in one district of Scotland. The zoning is classified as (a) normal, (b) simple...talc, actinolite,chlorite, and biotite in Unst, Shetland Islands. In an injection-zone within the staur...staurolitekyanite-garnet-gneisses of western Unst occur spherical or ellipsoidal bodies, up to 20-ft. diameter...fragmentation of peridotite sills during the staurolite-kyanite-garnet metamorphism, followed by the...chlorite-producing metamorphisms that have affected the staurolite-kyanite-garnet-gneisses. MR. M. H. HEY and MR |
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| Norwick hornblendic schists of Unst and Fetlar and the obduction of the Shetland ophiolite DEREK FLINN, 1 J...serpentinized ultramafic—basic nappes forming the Shetland ophiolite. T h e N o r w i c k hornblendic schists...mantle at the onset of obduction. However, in Shetland the highest grade hornblende-schist occurs in...considered to date the onset of obduction. For the Shetland ophiolite the date obtained is earlier than equivalent...ultramafic—mafic complex of U n s t and Fetlar in the Shetland Islands is a fragmented ophiolite. M a n y of the |
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| schists in the biotite, garnet, and lower grade staurolite zones; in quartz-carbonate veins and other hydrothermal...environments. Association: Muscovite, chlorite, staurolite, garnet, kyanite, quartz, mica, rutile. Distribution:...Austria. In Scotland, along the coast between Stonehaven and Aberdeen; and from Unst, Shetland Islands. Around |
