Metamorphism of calc-silicate and related rocks from the Dalradian of N.E. Scotland. by Stuart Kearns Download PDF EPUB FB2
Topics: 08E - Geology, mineralogy, sedimentology, Metamorphism of calc-silicate and related rocks from the Dalradian of N.E. Scotland [ Calcareous rocks in Scotland] Year: OAI identifier.
Metamorphism of calc-silicate and related rocks from the Dalradian of N.E. Scotland. Author: Kearns, Stuart. ISNI: Awarding Body: Derbyshire College of Higher Education Current Institution: University of Derby Date of Award.
The Dalradian rocks were surveyed by D. Haldane, J. Knox, J. Phemister, H.H. Read, T. Robertson and G.V. Wilson but the only ensuing publications were those of Read, which concentrated upon the metamorphism (Read,Read,Read,Read, ) and the Caledonian ophiolite-complex of Unst and Fetlar (see the Caledonian Igneous rocks Cited by: Calc-silicate rocks from the Southern Highland Group of the Dalradian at Banff are metamorphosed carbonate concretions.
Many original sedimentary features are preserved even though the calc-silicates now have amphibolite facies mineral assemblages. Those occurring in the andalusite and staurolite zones contain layered mineral assemblages that are characterized by the presence of Cited by: 3.
The calc-silicate rocks [Show full abstract] described here are from Inverness-shire in the Western Highlands of Scotland. Distinctive prograde mineral assemblages define four narrow zones Author: Toby Rivers.
However, Johnson et al. () showed that granulite-facies metamorphism and emplacement of mafic rocks into the host Dalradian metasedimentary rocks is a feasible mechanism to have derived granitic melts, which might have coalesced to form larger bodies such as the Strichen and Aberdeen plutons (c.f.
Oliver et al., ). The metamorphic history of the Dalradian rocks in central and eastern Scotland is now known to be extremely complex; the highest pressures of kbar ( km depth) were achieved at Ma. Mobility of gold during metamorphism of the Dalradian in Scotland. Article.
May ; The second stage calc-silicate rocks are associated with shear zones and their origin is attributed to. Hudson NFC () Regional metamorphism of some Dalradian pelites in the Buchan area, N.E.
Scotland. Contrib Mineralog Petrol –51 Google Scholar Kawakami T, Ikeda T () Boron in metapelites controlled by the breakdown of tourmaline and retrograde formation of borosilicates in the Yanai area, Ryoke metamorphic belt, SW Japan. The overlying Dalradian rocks are everywhere in tectonic contact with the Annagh Gneiss Complex (Max & Long ) and belong to the Grampian and Appin Groups, stratigraphically the lowest of the.
A series of Dalradian (Upper Precambrian-Lower Cambrian) metasedimentary rocks occur as an envelope to a granitic igneous complex at Slieve Gamph, Western Ireland. These metasedimentary rocks have been deformed at several distinct times and.
Deformation and regional metamorphism: In our calc-silicate rock, evidence that the bedding was folded (at least) twice is provided by a fold interference pattern (Figs.1 & 5), the most obvi- ous part of which is the banana-shaped closed loop in the top centre of the sample.
Book Chapter (1) Article Type. Metamorphic CO 2 production in calc-silicate rocks from the eastern Himalaya. Journal: Italian Journal of Geosciences. Scope Notes: Some compositionally metacarbonate rocks, may be classified under metasomatic rocks or in groups related to contact metamorphism.
Added to Thesaurus in Abstract. The intensity of metamorphism and the vigor of metamorphic transformation is expressed by the term metamorphic grade. If for instance a granitic pluton intrudes sedimentary rocks, the resulting contact metamorphic aureole will contain rocks of higher grade close to the contact of the granite (heat source) and rocks of low grade at greater distance from the granite where the sediments.
Please read our short guide how to send a book to Kindle. metamorphism metamorphic fig reactions minerals garnet kyanite grains calcite deformation chemical textures metamorphic rocks plagioclase feldspar albite grain staurolite pelitic Calc-Silicate Rocks; Biotite zone: Greenschist facies: Talc, phlogopite that they reflected a more or less constant metamorphism of rocks of systematically, but subtly, changing constitution.
The variation in garnet, biotite and chlorite composition in medium grade pelitic rocks from the Dalradian, Scotland with particular. The pegmatite formation is thus related to partial melting events that occurred during the retrograde amphibolite-facies metamorphism shortly after the eclogitization.
A U-Pb date of ± 10 Ma obtained for the sectorial in CL zircons is considered as the age of the granulite-facies metamorphism established previously within the BMB.
Cambridge Core - Mineralogy, Petrology and Volcanology - Principles of Igneous and Metamorphic Petrology - by Anthony Philpotts. Research & Fieldwork Many universities and colleges, from the UK and abroad, choose Lochaber as a venue for geological fieldwork courses. The exposure in the mountainous areas provides excellent, accessible opportunities for illustrating geological relationships in three dimensions.
The long fjord coastline provides hundreds of km of well exposed rock. The range of rock types, [ ]. Lateral gradations into carbonate-rich rocks are rare (e.g., south of Ameroo Hill). Iron-formations in the Petite and Calc-silicate Suites A few iron-formations occur higher in the Olary Block sequence, in the Calc-silicate and Pelite Suites, and are associated with calc-silicate-bearing and pelite-psammopelite rocks (Fig.
Ferry JM () Prograde-retrograde fluid flow during contact metamorphism of siliceous carbonate rocks from the Ballachulish aureole, Scotland. Contrib Miner petrol – Google Scholar Ferry JM () The role of volatile transport by diffusion and dispersion in driving biotite-forming reactions during regional metamorphism of the Gile.
Principles of Igneous and Metamorphic Petrology - by Anthony Philpotts January by Bailey () and Bowes & Wright (). Bailey () described the Dalradian succession, including the Appin Quartzite, and outlined the gross structur the oe areaf. The intrusions all post-date Caledonian regional metamorphism and deformation.
This account describes features occurring around an intrusion (E. 14) in the Keil Group of. Ultramafic and related rocks in the map-area and in the Southern Coast Crystalline Complex and the Northern Cascade Mountains may have formed in a marginal basin which was in existence from Mississippian to Late Triassic.
Rock and mineral chemistry of pelites indicates that the composition of white mica is sensitive to metamorphic grade, and. The steeply dipping Virdibreck Shear Zone separates the Sand Voe Group from the metasedimentary and metavolcanic rocks of the Queyfirth Group, which has been correlated with the Neoproterozoic to Cambrian Dalradian Supergroup, which underlies large tracts of the Grampian Terrane in mainland Scotland (Fig.
1; Flinn ). Abstract. Previous studies of metapelitic rocks from the core of the southern Brittany metamorphic belt suggest a complex clockwise P–T evolution.
We use pseudosections calculated for an average subaluminous metapelite composition in the MnNCKFMASH system and average P–T calculations to investigate in more detail the metamorphic evolution of these rocks.
Displacement on the younger detachments, which exhumed lower-plate rocks, was broadly syncollisional, as indicated by the overlap in age with ultrahigh-pressure metamorphism in the north at – Ma, and it may have been synchronous with young thrusts that emplaced high-pressure lower-plate rocks over the foreland and with strike-slip.
Scotland Scotland Scotland Scotland Scotland Rockall 1 Bank Scotland 46 85 5 18 I I 13 (3- 22) 14 (6- 21) I 2. 9 (3- 15) I 15, 2 B. Contact metamorphism Peli tic and paammitic rocks in contact with granites Basic rocks in contact with granite Andésite in contect with granite Schists in contact with granitic rocks Limestone skarn.
all geography including DSDP/ODP Sites and Legs Africa North Africa. Short-duration regional metamorphism is a recently observed and poorly understood phenomenon in metamorphic geology. In this review, it is defined as metamorphism on time scales that limit length scales (of the associated thermal anomaly) to significantly less than the thickness of the orogenic crust.
/(95) /(95) Lower Calcsilicate Unit metasediments and Napperby Gneiss metagranites at Conical Hill in the Reynolds Range, central Australia, underwent at least two periods of fluid flow. The ingress of surface-derived fluids ( metamorphism produced .The origins of the Scotland that is known today lie in five quite distinct geological histories.
This book takes the reader on a tour of each of these regions in turn, starting with the Northwest Highlands and Outer Hebrides, which contain some of the oldest rocks on Earth, through the mountain terrains of the Highlands and Uplands to the.
Since metamorphism means changes of rocks or rock complexes in an essentially solid state, the melting temperature of rocks indicates the high-temperature limit of metamorphism. As shown in Fig.l, granitic rocks begin to melt at about °C in the pressure range of kbar, if ps = pfluid (Goranson, ; Tuttle and Bowen, ; Yoder.