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| Minor Element Chemistry of Alkali Feldspars in the Klokken Layered Syenite Series by R. A. MASON, 1 I. PARSONS...syenite series in the KJokken gabbro-syenite complex, South Greenland have been measured using an ion microprobe...layered series of the Klokken gabbro-syenite complex in the Gardar province, South Greenland. The major element...AB9 IAS, Scotland GEOCHEMISTRY OF THE KLOK.KEN COMPLEX 953 circumventing the difficulty of achieving...Stockholms Universitet on September 10, 2015 The Klokken intrusion is an oval zoned stock, 4 x 3 km across |
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| of magmatic ‘water’ in the Klokken layered syenite intrusion, South Greenland Ian Parsons Transactions...of magmatic ‘water’ in the Klokken layered syenite intrusion, South Greenland. Transactions of the Royal...of magmatic 'water' in the Klokken layered syenite intrusion, South Greenland Ian Parsons ABSTRACT: The...The layered syenites in the Klokken intrusion consist of horizons of fine-grained, granulaf-textured ferroaugite...Structure and cryptic variation in the Klokken intrusion The Klokken intrusion is a small stock (4x3 km) |
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| Differentiation in the Proterozoic Gjerstad-Morkeheia Complex of South Norway K.P. Milne and I.C. Starmer Department...4NS, England Abstract. The Gjerstad-Morkeheia Complex contains a se- ries of highly differentiated,...suites (e.g. in the Gardar Province of South Greenland). The intrusions were anorogenic and emplaced...isolated mass (named here the 'GjerstadMorkeheia Complex') which differs from rocks in the surrounding region...trending mylonite zone. The GjerstadMorkeheia Complex intruded the 'Telemark Basement Gneisses' with |
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| and deformational history of the crystals in a complex way. Interactions between feldspars and hydrous...requests to: I. Parsons many illustrations of such complex textures.) Until recently, the most informative...BB. 25 samples from the layered series in the Klokken syenite stock (Brown et al. 1983; Brown and Parsons...'mesoperthite' from syenogabbro near the margin of the Klokken stock (Parsons and Brown 1983; Brown and Parsons...intrusion, a larvikitic layered syenite similar to Klokken in size (Upton 1960). 1, 2. Samples 189 and 128 |
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| Abstract. Alkali feldspars in the Klokken layered syenite (South Greenland) are optically either coarse,...of normal microscope work. In the case of the Klokken intrusion, described here, their occurrence is...of the cryptoperthites in the relatively large Klokken pluton are in the same range as those in lavas...coarsening rates obtained experimentally, the Klokken alkali feldspars should be much coarser microperthites...of the Klokken Layered Series The internal complexities and mineralogy of the Klokken complex (South |
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| inside the contact of the Klokken gabbro-syenite stock. It contains plagioclase, mesoperthite and cryptoperthite...crystals have sharp boundaries with each other. Plagioclase (zoned An 55-35, with 2 3% Or) defines a solidus...(1958). H and H' are the supposed mesoperthite-plagioclase pair of O'Hara and Yarwood (1978). R is the...and random positioning on perthitic grains or plagioclase-alkali feldspar aggregates), does not give a...(1978) have argued that very coarse, irregular, plagioclase-alkali feldspar intergrowths in some granulite |
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| Springer-Verlag1988 Sidewall crystallization in the Klokken intrusion: zoned ternary feldspars and coexisting... Abstract. The syenitic layered series in the Klokken intru- sion is surrounded by a zone (~500 m thick)...the syenodiorite zone from rocks dominated by plagioclase, in some cases together with two alkali feldspars...the other a cryptoperthite, to rocks in which plagioclase is seen only rarely as cores to cryptomesoperthitic...cryptomesoperthitic alkali feldspar crystals. Plagioclase is absent from the layered series. Alkali feldspars occurring |
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| differences. The incorporation of K into Ca-rich plagioclase and of Ca into K-rich alkali feldspar is more...a teschenite sill in Scotland, the Klokken syenogabbro in Greenland, and a granulite-facies metapelite...geologically relevant periods, as documented by plagioclase grains with different An contents that occur...observed. The incorporation of K into Ca-rich plagioclase and of Ca into K-rich alkali feldspar is strongly...history, however, it is clear that the An-rich plagioclase grew at higher temperatures than the Ab-rich |
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| The Klokken Gabbro-Syenite Complex, South Greenland: Cryptic Variation and Origin of Inversely Graded...1977; in revisedform 2 June 1978) ABSTRACT The Klokken stock has an outer sheath of vertically banded...biotite-syenodiorite and finally by quartzsyenite aplites. Plagioclase (An57 in gabbros) is progressively mantled by...fractionated syenites in the layered series. The Klokken chamber was lined by gabbro with only limited in...Scotland 654 I. PARSONS INTRODUCTION T H E Klokken intrusion is a small stock (Fig. 2), predominantly |
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| from a complex three-feldspar syenogabbro (specimen G G U 140169) from the margin of the Klokken gabbro-syenite...gabbro-syenite pluton, South Greenland (see Parsons and Brown 1983 for full petrological description). The...The syenogabbro contains early plagioclase generally overgrown in parallel orientation by a fine optically... specimen G G U 140169, from the Klokken intrusion, South Greenland. Two perthitic feldspars are visible...regular, periodic Albite twinning visible in the plagioclase phase of either or both perthites, b* being normal |
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| Elsonian layered basic intrusions of the Nain Complex. One of these, a crudely layered mass which ranges...correlated with Gardar igneous activity in south Greenland. The petrogenesis of the peralkaline suite is...been recognised in the Gardar Province of South Greenland (Emeleus and Upton 1976; Blaxland et al. 1978)...major plutonic association, termed the Nain Complex. This complex has intruded both Proterozoic (ca. 1,700-1...The occurrence ofperalkaline granites within the complex was first documented by Collerson and Ryan (1974) |
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| Mid-Proterozoic alkaline magmatism in southern Greenland" the Gardar province B. G. J. Upton & C. H. Emeleus...Introduction Intra-plate alkaline magmatism in southern Greenland in the period 1320-1120 Ma gave rise to the Gardar...Proterozoic time was composed of North America, Greenland and Europe (Piper 1982), whose tectono-magmatic...G. J. Upton & C. H. Emeleus In the southern Greenland area of the Proterozoic supercontinent it is suggested...anorthosites, ferrosyenites developed in southern Greenland from the crystallization of benmoreitic residual |
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| presence of calcium, in what became known as the “plagioclase effect.” By that time he must have realized that...that his (1915) bending of the plagioclase–diopside field boundary to pure Ab was a mistake, and if he...partitioning he would have discovered that the plagioclase in equilibrium with the multicomponent liquid...experimental studies. The effect of fayalite on plagioclase compositions (Morse and Brady 2017b) is striking...monitored routinely by reference to standard plagioclase PG-721. By this means 192 separated feldspar |
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| in a differentiated alkaline complex: Kfingnfit Fjeld, South Greenland D. STEPHENSON Institute of Geological...3JW ABSTRACT. Kt~ngmit Fjeld is an intrusive complex resulting from three intrusive events involving...(annite3~ to annite98.5). KONGNAT FJELD, south Greenland, is a deeply dissected mountainous area composed...1971). While dominantly syenitic, the alkaline complex exhibits an essentially continuous spectrum of...beneath a cover estimated at 4-5 km thickness. The complex is the westernmost known in the Gardar alkaline |
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| rare, but from the Eyjat]allaj~Skull volcanic complex in southern Iceland some xenoliths of quartz-syenite...porphyritic granites with phenocrysts of either plagioclase or alkali feldspar mantled by alkali feldspar...aegirines of the Werner Bjerge granites, eastern Greenland (Brooks et al., 1982). The pyroxene evolution...Coldwell complex, Canada (Mitchell and Platt, 1978), the Klokken complex, southern Greenland (Parsons...(Czamanske et al., 1977) and the Klokken complex, southern Greenland (Parsons, 1979, 1981). Like in the |
 | Upton, B. G. J., Macdonald, R., Odling, N., Rämö, O. T., Bagiński, B. (2013) Kûngnât, revisited. A review of five decades of research into an alkaline complex in South Greenland, with new trace-element and Nd isotopic data. Mineralogical Magazine, 77 (4) 523-550 doi:10.1180/minmag.2013.077.4.11 | Journal (article/letter/editorial) |
| decades of research into an alkaline complex in South Greenland, with new trace-element and Nd isotopic... The Kûngnât Complex (12751.8 Ma) in the Gardar Alkaline Province, South Greenland, cuts Archaean...peralkaline granites include the Zomba–Malosa complex, Chilwa alkaline province, Malawi (Woolley and...graben, Norway (Oftedahl, 1978), the Evisa-Calasima complex, Corsica (Bonin, 1988), plutons of the Velasco...ringcomplexes (Bowden et al., 1987) and Center 1, Coldwell Complex, Ontario (Mitchell and Platt, 1978; Platt and Mitchell |
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| DECEMBER 1985 The Tugtut6q older giant dyke complex: mineralogy and geochemistry of an alkali gabb... association in the Gardar Province of South Greenland B. G. J. UPTON Grant Institute of Geology, University...Edinburgh EH9 3JW ABSTRACT. The Older Giant Dyke Complex is a differentiated alkaline intrusion of Proterozoic...foyaite in the ENE. Chilled margins contain plagioclase (An53), olivine (F053), magnetite, ilmenite,...synthetic QEM buffer curve. In the border group, plagioclase cores zone into anorthoclase and soda-sanidine |
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| study of a suite of alkali feldspars from the Klokken syenite intrusion (U-Pb age 1166 + 4 Ma) which...rocks. The Klokken layered syenite in the Proterozoic Gardar Province of South Greenland (PARSONS,1979;...These powerful independent constraints render the Klokken intrusion ideal for investigating the problem of...intergrowths, as they affect the fel~pars from the Klokken intrusion, are summarised in Fig. 1. TEM photomicrographs...on Fig. 1) is dependent on cooling rate, In the Klokken intrusion X1 increases logarithmi&ly downwards |
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| syenite pluton, the Klokken intrusion, in the pre-Cambrian Gardar province in South Greenland. The photomicrographs...i958 ) on the basis of whether they contain plagioclase as a discrete phase or in perthitic intergrowth...Fig. 2 shows feldspar bulk compositions for the Klokken syenite. Each analysis represents a separate microperthitic...occurred in the Klokken example or very probably in the majority of epizonal intrusives. The Klokken feldspars...not so restricted because they coexist with plagioclase. An Ab Or [] Ab u~ 9 o 9 [] M vA 60 v |
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| Metallogeny of South Greenland: A review of geological evolution, mineral occurrences...Jochen, Thrane, Kristine, Metallogeny of South Greenland: A review of geological evolution, mineral occurrences...pertain. ACCEPTED MANUSCRIPT Metallogeny of South Greenland: A review of geological evolution, mineral occurrences...Thrane IP The Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark...steenfelt@gmail.com; ast@geus.dk NU Abstract South Greenland has been the site of historic mining of cryolite |
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| Narssarssuk, Greenland. Photo by R. Bode. TITLE PAGE: The most common mineral in Greenland: ice —making...up the typical Arctic icebergs, ubiquitous in Greenland waters; photo by B. L. Nielsen. This special...GEOLOGICAL MAP OF GREENLAND NUUK (GODTHAB) PAAMIUT (FREDERIKSHAB) ARSUK NARSARSUAQ NARSAQ QAQORTOQ (JULIANEHAB)...Paleozoic and Mesozoic North Greenland platform and fold belt East Greenland Caledonian fold belt P rote...Archaean i 500 km i i i i PREFACE Throughout Greenland there are many interesting mineral localities |
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| VARIATION WITHIN THREE ALKALINE COMPLEXES IN SOUTH GREENLAND B R I A N G. J. U P T O N , J O H N E. T H O M...variation within three alkaline complexe~ in south Greenland. Lithos 4, 163-84. Comparison is made between...suite of traehytic and rhyolitic dykes. In each complex a zimilar suite of trachytie and comendit~c magmas...atmosphere and wall-rocks. In the Kfingn~tt Fjeld complex where cooling was dowest, alkali loss is inferred...mildly peralurninous in consequence. In the dyke complex cooi,~ng was rapid and alkali loss less se.vere; |
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| and geochemistry of the Abu Dom alkaline ring-complex, Bayuda Desert, Sudan D. A. O’Halloran Department...Liverpool University, L69 3BX. U.K. The Abu Dom complex is one of a cluster of Younger Granite ringcomplexes...with the exception of the well-known Sabaloka Complex (Almond 1977; Harris et al. 1983) few detailed...petrology and geochemistry of one example, the Abu Dom complex, are discussed. 2. General geology The Younger...emplaced into the Grey Gneiss Group of the Basement Complex of northern Sudan (Vail 1979). WAr dating of 0 |
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| reflect the existence of contemporaneous “basalt” (plagioclase-bearing) magmas that interacted with the syenitic...magmas, may have resulted from interaction with plagioclase-rich (“basalt”) magmas at greater depths. © 2014...scarce corroded plagioclase cores within alkali feldspar (Fig. 3G). These plagioclase crystals show features...graphic texture, are the main minerals, with plagioclase, amphibole and magnetite as additional phases...Rb raise (Carvalho and Janasi, 2012). Scarce plagioclase crystals occur as corroded relics within Afs |
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| FELDSPARS 1. AVERAGE STRUCTURES OF ALKALI AND PLAGIOCLASE FELDSPARS : SYSTEMATICS AND APPLICATIONS 1 ...average structure data Average structures of plagioclase Lattice parameters as determinative methods for...feldspars Summary References 2. PHASE RELATIONS OF PLAGIOCLASE FELDSPARS 2 3 7 16 21 30 33 38 40 47 49...Introduction Albite Anorthite High-temperature plagioclase Low plagioclase Conclusion References 58 62 63 68...11.2 Exchange equilibria of Na and Ca between plagioclase and an aqueous chloride solution III. Conclusion |
