 | | Journal (article/letter/editorial) | | Gibb z 1 Department of Geology, The University, Manchester MI3 9PL, UK 2 Department of Geology, The University...$1 3JD, UK Abstract. Mineral compositional relationships have been studied in a variety of alkaline...forming the matrix of some of the rocks which seem to have formed under conditions of almost perfect fractional...fractional crystallization. The compositions of nephelines from the various rocks define an overall evolutionary...recrystallization processes. Most of the rocks studied appear to have crystallized plagioclase as the first felsic |  | | Journal (article/letter/editorial) | | 122 Dr. F. Walkerā by the feet of the horses and cattle which roam these plains. Beneath this layer...thinner band B. B. Composed of similar clay but containing great quantities of charred wood, indicating...previous existence of forest conditions. This does not quite agree with the views of Hartt (2) who seemed...that on the north side of the belt of grit there has been no forest because of the youth of the deposits...old forest layer the succeeding 2 feet is composed of very light grey clay which contains patches almost |  | | Journal (article/letter/editorial) | | 0. W. TyrrellāPetrology of Arran. 305 V I . ā T H E PETROLOGY OF ARRAN. By G. W. TYRRELL, A . E . C...Professor of Geology, University of Glasgow. 1. THE RlEBECKITE-ORTHOPHYRE OP THE HOLY ISLE. F o u r...r OCCUX- rences of acid and sub-acid igneous rocks containing the rare soda-amphibole riebeckite have...in Great Britain, of which that of Ailsa Craig is the best known. The occurrences of Ailsa Craig1 and...contain ragged moss-like areas of riebeckite, together with microphenocrysts of quartz and alkalifelspar, |  | | Journal (article/letter/editorial) | | 3 4 - 7 Formation of analcime in the Dippin sill, Isle of Arran T H E Dippin sill is a Tertiary differentiated...the SE. part of the Isle of Arran, Scotland. The sill is composed of different varieties of analcime olivine...clear, wedgeshapes in the interstices between plagioclase laths. The interstitial analcime is characterized...along innumerable small cracks in plagioclase and as a major constituent of large patches, up to I cm across...radiating aggregates of other zeolites. Rocks from the chilled margins of the sill are characteristically |  | | Book (chapter) | | Province C. H. Emeleus Reader in Geology, University of Durham and M. C. Gyopari Senior Hydrogeologist,... References Agrell, S.O. (1965) Polythermal metamorphism of limestones at Kilchoan, Ardnamurchan. Mineralogical...structure and petrology of the Tertiary volcanic rocks of Eigg. Muck and Canna, N.W. Scotland. Unpublished M.Sc...University of Durham. Allwright, A.E. and Hudson, J.D. (1982) The Sgurr of Eigg. Journal of the Geological...Society of London, 139, p. 215 (abstract). Almond, D.C. ( 1960) The Tertiary igneous geology of Strathaird |  | | Book (chapter) | | Province C. H. Emeleus Reader in Geology, University of Durham and M. C. Gyopari Senior Hydrogeologist,...ā¢ Tokyo ā¢ Melbourne ā¢ Madras Chap ter 6 Isle of Arran Introduction INTRODUCTION outermost parts...within the first, are present (see Arran has long been known as an area of complex Harker in Gunn, 1903; Tyrrell...Granite. beauty (Fig 6.1). It is the most accessible of the Their significance to the British Tertiary Volcanic...in the geology of Arran goes back over Complex and, additionally, that emplacement of more than 200 years |  | | Journal (article/letter/editorial) | | contamination of the Dippin sill, Isle of Arran, Western Scotland A. P. DICKIN* Department of Geology and...Mineralogy, University of Oxford, Oxford OX1 3PR C. M. B. HENDERSON Department of Geology, The University...Department of Geology, University of Sheffield, Sheffield $1 3JD ABSTRACT. The Dippin sill, which is...is emplaced into the Triassic sediments of SE Arran, is an alkaline basic sheet which displays pronounced...pronounced hydrothermal alteration. The 40-m-thick sill has suffered pervasive contamination with radiogenic |  | | Report (edition) | | ASSOC! \1101\J GUIDE No. 32 ISLE OF ARRAN A field guide for students of geology by W. S. McKERROW and...exists to fo. ter the progess and diffusion of the science of Geology. It holds lecture meetings in London...Piccadilly. London WI V 9AG. All rights reserved. No pan of this publication may be reproduced. stored in a retrieval...permission in writing of Lbe author and the GeologistsĀ· Association. oles. The details of routes given in...in tJ1is guide do not imply a right of' way. The onus f obtaining pen11ission to use footpatJ,s and to |  | | Book (edition) | | Macgregorās excursion guide to the GEOLOGY OF ARRAN Edited and revised by ā}.G. MacDonald & A. Herriot... -Macgregorās Excursion Guide to the GEOLOGY OF ARRAN Third Edition Revised and edited by J. G. MacDONALD...SOCIETY OF GLASGOW, 1983 THE UNIVERSITY, GLASGOW G12 800 Printed by MeCORQUODALE (SCOTLAND) LTD GLASGOW...GLASGOW Ā© The Geological Society of Glasgow First edition 1965 Reprinted 1968 Second edition 1972 Third...==z FOREWORD Arran, that lovely island which dominates the broad estuary of the Firth of Clyde, has long |  | | Journal (article/letter/editorial) | | an enstatitc achondrite EXTRATERRESTRIAL examples of the amphibole richterite [Na2CaMgsSisO22(OH,F)2 ]...and Plant, 1968). This paper reports an occurrence of richterite in an enstatite achondrite. On 3 August...in the Adamawa district of Nigeria, and was quickly recovered. An examination of the mineralogy and chemistry...fusion crust. On the surface, and throughout the body of the stone, are numerous irregular vugs up to 1 cm...in diameter in which richterite occurs as bundles of radiating fibrous needles up to 3 mm long. The vugs |  | | Journal (article/letter/editorial) | | Foland Ć” F. G. F. Gibb Ć” C. M. B. Henderson Patterns of Nd and Sr isotopic ratios produced by magmatic and...post-magmatic processes in the Shiant Isles Main Sill, Scotland Received: 20 December 1999 / Accepted: 5 May...Shiant Isles Main Sill of the British Tertiary Igneous Province is a classic example of a diĀerentiated...diĀerentiated, alkaline basic sill. Four separate intrusions, each emplaced internally in rapid succession, form a...a 165-m-thick sill hosted by Lower Jurassic sedimentary rocks. Extensive Nd and Sr isotopic studies were |  | | Journal (article/letter/editorial) | | ALPHABETICAL INDEX Names of authors are printed in SMALLCAPITALS,subjects in lower-case roman, and localities...Aegirine, titanian, valency of Ti in, 553, 554 Aegirine-augite, Assynt, Scotland, anal., 529 and M7 Afwillite...meteoritic, anal., 487 ALABASTER (C. J.), An occurrence of brucite at Merehead quarry, Cranmore, Somerset, 4o0... Geochemistry and strontium isotopic composition of basalts from the Eastern Deccan, i65 Ammonium calcium...Fluor-richterite Analcime, New Zealand, 398; Isle of Arran, mode of formation, stability relations, 534 Anhydrite |  | | Journal (article/letter/editorial) | | Springer-Verlag 1984 Petrology and geochemistry of differentiated teschenite intrusions from the Hunter...Australia J.A. Gamble Department of Geology, Victoria University of Wellington, Private Bag, Wellington...In the upper Hunter Valley of New South Wales a high level teschenitic sill complex emplaced into Permian...products of alkali basaltic melts. The sills crystallised in situ and produced a spectrum of rock types...a progressive decrease in olivine and a build-up of alkaline mesostasis which is accompanied by strong |  | | Journal (article/letter/editorial) | | Crinanite By J. F. G. WILKINSON ABSTRACT Various aspects of the terms teschenite and crinanite are discussed...that the use of the term crinanite be discontinued. INTRODUCTION D URING the investigation of a differentiated...differentiated teschenite sill near Gunnedah, New South Wales, a study of the literature revealed considerable...considerable variation in the meaning and significance of the terms teschenite and crinanite. " . . . there is...resulting from continued petrographic usage of the terms, the proposal of actual basic magma types characterized |  | | Journal (article/letter/editorial) | | Penistone, francolite, siderite (magnesian), 287, M4 ISLE OF MAN Lough Skillicore, calcite, dolomite, illite...pyrobelonite, roman6chite, vanadinite, hausmannite, 85 SCOTLAND Arisaig, Inverness-shire, tholeiite, 273 Bad na...microeline, richterite, aegirine-augite, M7 Dippin sill, Isle of Arran, analcime, 534 Harris, Hebrides, tholeiite...muscovite-3T, 4oo TOPOGRAPHICAL 558 AFRICA Gulf of Aden, basalt, ferromanganese oxide, smectite, 193...darapskite, halite, 548 Carter's mine, Madison County, North Carolina, kerolitc, 443 Christmas mine, Gila Count) |  | | Journal (article/letter/editorial) | | ALPHABETICAL INDEX Names of authors are printed in SMALLCAPITALS,subjects in lower-case roman, and...titanian, in teschenite sill, 529 Aenigmatites, Greenland, 9 Aikinite, Scotland, 88 ALLEN, D., polishing...see UPTON, B. G. J., 323 BELL, B. R., geochemistry of Lower Tertiary basic dykes, 365 BENDELOW, V. C.,... D. C., zaherite, 131 BIGGAR, G. M., composition of diopside solid solutions, 481 Biotite, Greenland...M. B., and GIBe, F. G. F., Sr contamination of Dippin sill, 311 Diopside solid solutions, composition |  | | Journal (article/letter/editorial) | | T H E PETROGRAPHY OF AEEAK. 3. PIICHSTONB XENOLITHS IN BASALT DYKE, DIPPIN, ARRAN. 1 By G. W. TYRRELL...Mineralogy and Petrology, University of Glasgow. phenomenon of which this paper treats occurs in a basalt...roadside north-east of Dippin, near the twelfth milestone from Brodick. This dyke runs from north-west to...crinanite) sill of Dippin. I t is probably the one referred to in the Geological Survey Memoir on North Arran...penetrating the tough, coarse, massive rock of the sill. The contacts are not plane, but abut against |  | | Journal (article/letter/editorial) | | 1-21 (1984) The Droimchogaidh sill, Connacht, Ireland P. Mohr Department of Geology, University College...Sub-depertrnent of Geophysics, University of Liverpool, Liverpool, U.K. and P. S.Kennan Department of Geology...Droimchogaidh sill, south-central Mayo, is sheeted at high-level in the Ordovician sedimentary pile of the South...fringe of the Conncmara-Murrisk Tertiary uplift. The sill is basin-shaped with a maximum thickness of about...about 100rn. It is composed of isotropic or weakly layered olivine gabbro, and subordinate, locallydeveloped |  | | Journal (article/letter/editorial) | | www.elsevier.com/locate/lithos Revisiting problem of chilled margins associated with marginal reversals...Centre, Apatity, Russia Department of Geosciences, University of Oulu, Oulu, Finland Received 24 November...chilled margins always develop as an integral part of their marginal reversals and possess the following...chilled margins are composed of the low temperature cotectic assemblages of relevant magmatic systems and...features of chilled margins can be partly attributed to contamination, intratelluric inhomogeneity of magma |  | | Report (issue) | | -Ā· . ., .:. ...:. Geology of Arran. (ll1e1n. Geol. ,.';urv.) VĀ£ew of ' 1000-Foot Platform ' a11oi1... DEPARTMENT OF SCIENTIFIC 4ļæ½ND INDUSTRIAL RESEARCH Memoirs of the Geological Survey, Scotland 17ze By...Geology in the University of Glasgow --- EDINBURGH PRINTED UNDER THE AUTHORITY OF HIS l\'.IAJESTY'S STATIONERY...Ā·ice 6s. 6d. Net PREFACE THE six-inch survey of Arran was begun in 1872 by Sir A. Geikie, who mapped...under the supervision of Dr. B. N. Peach, completed the detailed examination of the island. To Mr. Gunn's |  | | Journal (article/letter/editorial) | | part 2~ THE PETROGRAPHY OF THE ā¢ ISLANDS. 317 101 The PEamO~R~.P]~Y of the AUSTRAL or TUBISXI ISLA...INTRODUCTION. THE following account of the petrography of the islands of Rapa and Rurutu in the Austral Group...Group is based on the collections made by one of us in April and May 1925 during the St. George Expedition...general account of the geology of t h e s e islands has already been given by one of us (Chubb, 1927)...Taga and the head of the harbour, though collections were made from many other parts of the island. I n |  | | Journal (article/letter/editorial) | | analcime: The Colima minettes Jlnrns F. Lurrn Department of Earth and Planetary Sciences,Washington University...S.A. T. Kunrrs Kvsnn Department of Geological Sciences,University of Saskatchewan,Saskatoon,SaskatchewanS7N...analcimehas X.,.,",: 0.684, ao: 13.712A, and one of the lowest D'sOvalues yet recorded for analcime (+9...it from analcime formed by ion-exchangeconversion of leucite (L-type analcime) or other precursor minerals...although the higher KrO and Rb contents and D'8Ovalues of L-type crystals may be diagnostic. P- and L-type |  | | Journal (article/letter/editorial) | | post-emplacement processes in the uppermost part of the Shiant Isles Main Sill C. M. B. HENDERSON1,*, F. G. F. GIBB2...FOLAND3 1 Department of Earth Sciences, University of Manchester, Manchester M13 9PL, UK Environmental & Geological...Geological Sciences, University of Sheffield, Sheffield S3 7HF, UK 3 Department of Geological Sciences, Ohio...Reinvestigation of the top 25 m of the 165 m thick Shiant Isles Main Sill requires reinterpretation of its internal...internal structure, especially of the last unit emplaced the granular olivine picro-dolerite. New mineral |  | | Report (edition) | | Regional Geology The Palaeogene volcanic districts of Scotland FOURTH EDITION CH Emeleus BR Bell Contributor:...regional geology: the Palaeogene volcanic districts of Scotland (Fourth edition). (British Geological Survey...Printed in the UK b>f Hawthornes, Nottingham C/0 7105 Authors CH Emeleus Department of Earth Sciences...University of Durham, Science Laboratories, South Road, Durham DH I 3LE BR Bell Division of Earth Sciences...Sciences, University of Glasgow, Gregory Building, Lilybank Gardens, Glasgow G 12 BQQ Contributor D Stephenson |  | | Journal (article/letter/editorial) | | and crinanitic units in the Shiant Isles sill: evidence of multiple intrusion F. G. F. G I B B * & C...ā¢Department of Geology, University of Sheffield, Sheffield SI 3JD, U.K. f Department of Geology, University...University of Manchester, Manchester M13 9PL, U.K. (Received 24 May 1988; accepted 19 August 1988) Abstract...described from the Tertiary, Shiant Isles sill (northwest Scotland). The lower discontinuity separates picrite...separates picrite from underlying crinanite. The sill is thus divided into an inner, strongly differentiated |
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