 | | Journal (article/letter/editorial) | | fenitize their country rocks to form a metasomatic zone c.100 m wide of alternate dark blue (mafic) and...magnesio-riebeckite which coexist with varying proportions of aegirine, albite, and K-feldspar, with or without phlogopite... The iron oxidation ratio [100Fe 3+/ (Fe 3§ + Fe 2+)] decreases in the magnesio-arfvedsonite for the...carbonatite intrusion has produced a wide metasomatic zone of alternately banded mafic and felsic fenites in...AMPHIBOLE ~ 1 7 6o, o~.'--, .,.~. ~A ~ ....... 4 ..... ~~ "'--~ O ~.... "-. ~ 9,~. . . . . ~ |  | | Journal (article/letter/editorial) | | emplaeed in lower Palaeozoic time in a ~eakness zone within the Precambrian shield. Dolomitic magma int...were emplaeed into the surrounding marginal ghock-zone as concentric and radial beforsite dykes and agglomerates...the Na-type. The whole complex covers about 90 km 2. The main rack-forming minerals are dolomite-ankerite...situat~L at 66°30'N, 51°15'W, in the transition zone between the Archaean grar,lulite facies gneiss complex...the NE-SW strike of the transition zone, with gentle NW dips (Fig. 2). The gneisses are granodioritic with |  | | Book (edition) | | COMPANY HUNTINGTON, NEW YORK 1980 ww Foy N#„69a@ 2 Original edition 1966 Reprint edition 1980 with Supplementary...National Science Foundation, Institutional Grant No. 39. 2. National Science Foundation, Grant G. P. 3449. The...States (nearly all localities), Canada, Germany, Norway, Sweden, Uganda, Tanganyika, Nyasaland, and India...Chapter Chapter Chapter Chapter Chapter Chapter 1 2 3 4 5 6 7 8 9 10 Introduction Alkalic Carbonatitic...APPENDICES REFERENCES LOCALITY INDEX SUBJECT INDEX 7 2 - re : : es oo ~ i mS anata i â a aad |  | | Journal (article/letter/editorial) | | carbonate-albite-muscovite-hematite-Nb-rutile and cancrinite-aegirine-carbonate fenites. The protolith foliation and...in metabasite PT are reconstituted to albite-aegirineâarfvedsonite/riebeckite assemblages. Geochemically...country rock Alpine Schist with unambiguous field 2 ACCEPTED MANUSCRIPT relationships suggesting that...metabasic rocks PT within the Alpine Schist. SC RI 2. Regional Geology The Alpine Dyke Swarm in northwest...quartzofeldspathic schist and PT it is converted to albite-aegirine-riebeckite/arfvedsonite schist and, in places |  | | Journal (article/letter/editorial) | | Gysi,1,â Anthony E. Williams-Jones,2 and Patrick Collins3 1 Department 2 Department of Geology and Geological...northeast-southwest section through the potential ore zone at Strange Lake. Based on these data, we develop...lithogeochemical vectors for their exploration. The B zone, located along the northwestern margin of the Strange...(HREE). Within this resource, there is an enriched zone containing 20 Mt of ore grading 1.44 wt % TREO,...enrichment in the light rare earth oxides (LREO). A 2-D geochemical model of the deposit indicates that |  | | Journal (article/letter/editorial) | | fenitized the country rocks to form a metasomatic zone c. 100 m wide of alternating mafic and felsic mica-bearing...by the intrusion of the early amphibole sovite. Aegirine buffered the iron distribution and the biotites...formation ofphlogopite in the fenites in a c. 3 m wide zone adjacent to the carbonatite, and evidently are the...them to varying degrees forming new minerals in a zone of banded fenites c. 100 m wide (Mian and Le Bas...has yielded a K - A r biotite average age of 31 _+2 M a and the subsequent movement of the thrust has |  | | Journal (article/letter/editorial) | | in revised form 21 August 2013; available online 4 September 2013 Abstract Petrological and geochemical...elements (REE) and Zr. The focus of the study was the B-Zone in the northwest of the pluton, which contains a...alteration by K-, Fe- and Al-phyllosilicates, aegirine, hematite, ïŹuorite and/or quartz, and that primary...ïŹuid/rock ratio; and pH > 4) and ïŹuid-buïŹered in the cores (high ïŹuid/rock ratio; pH 6 2). We propose a model...(Salvi and Williams-Jones, 2006) and the nephelineâaegirine syenites at Thor Lake (Sheard et al., 2012), in |  | | Journal (article/letter/editorial) | | GEOLOGICAL VOL. LXXXVI. MAGAZINE No. 2. MARCH-APRIL, 1949 An Alkali Fades of Granite at Granite-Dolomite...referred to above, the VOL. LXXXVI.âNO. 2 7 82 C. E. Tilley- zone reaches a foot or more in width. At...about 15 feet long, with a width of not less than 4 feet, but the whole contact with the marble is not...bordering it is a zone of grossularite-wollastonite. This is followed by a thin zone of dark clinopyroxene...clinopyroxene (Cp(d)), a coarse pale clinopyroxene zone (Cp(p)) with dark patches rich in spinel, vesuvianite |  | | Journal (article/letter/editorial) | | Gujarat, India. 2. Complexly zoned clinopyroxene phenocrysts N. M. S. Rock 1'*, L. G. Gwalani 2, and B. J....Western Australia 2 Nagpur University, Nagpur, India * Deceased With ll Figures Received March 2, 1992; accepted...titanian diopside (m9 = Mg/[Mg + Fet] = 92) to aegirine (m9 = 17), but Ca-pyroxenes are dominant (~90%...the rim), reverse (na 4, as mg t), inverse ( n a t as mg t), converse (na + as m9 4,), unzoned (no change)...Umgebung, Deccan AlkaliProvinz, Gujarat, lndien. 2. Komplex zonierte Klinopyroxenkristalle Klinopyroxenkristalle |  | | Report (issue) | | Abstract/RĂ©sumĂ© 1 Introduction 2 Collecting along the route 2 Units of measurement 3 A brief...quarry RenfrewâMadawaska area Renfrew County Road 4 (Bruce Avenue) roadcut Highway 60 quarry Jamieson...148 (Bryson) roadcuts Carswell quarry Bryson marble blocks Bryson roadcut 1 Bryson roadcut 2 New Calumet...mines and occurrences Table 4 1. Rock formations referred to in text Figure 2 viii 1. Map showing the...119 124 126 130 133 135 145 154 158 165 166 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17 |  | Cheng, Hao, Zhang, Chao, Vervoort, Jeffrey D., Wu, Yuanbao, Zheng, Yongfei, Zheng, Shu, Zhou, Zuyi (2011) New LuâHf geochronology constrains the onset of continental subduction in the Dabie orogen. Lithos, 121 (1) 41-54 doi:10.1016/j.lithos.2010.10.004 | Journal (article/letter/editorial) | | craton trench occurred no later than ca. 256 Ma. 2. Sample descriptions The middle part of the QinlingâDabie...blueschistâgreenschist zone, (2) the Tongbai complex, (3) the Balifan tectonic mĂ©lange, and (4) the Nanwan ïŹysch...Blueschist greenshist Zone Hefei ab Tongbai Complex Study area WD Qi nli Eclogite Zone Na ny ba ang...Analytical errors (RSD%) for major elements were 1â2% (1Ï) or smaller. Major element compositions of minerals...voltage, a 20 nA beam current on the Faraday cup, 1â2 ÎŒm beam diameter and counting times on the peak of |  | | Journal (article/letter/editorial) | | OF HYDROTHERMAL ALTERATION IN THE CHERNIGOV FAULT ZONE N. I. Deryabin To cite this article: N. I. Deryabin...OF HYDROTHERMAL ALTERATION IN THE CHERNIGOV FAULT ZONE, International Geology Review, 28:9, 1045-1054,...OF HYDROTHERMAL ALTERATION IN THE CHERNIGOV FAULT ZONE N. I. Deryabin Downloaded by [University of Florida]...originally sedimentary carbonates. The Chernigov fault zone in the western Azov region is characterized by the...occurrence of apatite carbonate rocks, which some authors [2, 3] consider to be carbonates in an ultrabasicalkaline |  | | Journal (article/letter/editorial) | | Kraemers Island these are referred to as zones 1 to 4, while at Bagnaesset they are designated zones A to...perthite, astrophyllite, arfvedsonite, aegirine, and zircon. Zone 1 has a coarse-grained texture with grain...greater. Zone 2 is a finer grained version of zone 1, with average grain size around 5 mm. Zone 3 is characterized...of zircon which comprise over 50 9/0of the rock. Zone 4 is unusually rich in fluorite which in places may... astrophyllite, aegirine, and biotite. The grain size in zone A is coarse, 0.5 to 2 cm, while zonesB |  | | Journal (issue) | | VIDENSKABELIGE UNDERS0GELSER I GR0NLAND Bn. 172 · NR.4 GR0NLANDS GEOLOGISKE UNDERS0GELSE GEOLOGY OF THE...BY J. FERGUSON WITH 38 FIGURES IN THE TEXT AND 2 MAPS K0BENHAVN C. A. REITZELS FORLAG BIANCO LUNOS...VIDENSKABELIGE UNDERS0GELSER I GR0NLAND Bn.172 · Nn.4 GR0NLANDS GEOLOGISKE UNDERS0GELSE GEOLOGY OF THE...BY J. FERGUSON WITH 38 FIGURES IN THE TEXT AND 2 MAPS K0BENHAVN C. A. REITZELS FORLAG BIANCO LUNOS........................................... 38 1* 4 J. FERGUSON IV Page Microscopic features . . |  | | Journal (article/letter/editorial) | | FIGURES IN THE TEXT AND 2 MAPS Reprinted from Meddelelser om GrĂžnland, Bd. 172, Nr. 4- KĂBENHAVN BlANCO...FIGURES IN THE TEXT AND 2 MAPS Reprinted from Meddelelser om GrĂžnland, Bd. 172, Nr. 4 KĂBENHAVN BlANCO LUNDS...28 28 29 30 30 30 30 32 32 34 34 34 36 38 38 38 4 J. FERGUSON IV Page Microscopic features Chemical...established for pre-Gardar time (BERTHELSEN 1960). 4. 3. 2. 1. Gardar period. Sanerutian period. Kuanitic...Genesis of the Ilimaussaq Intrusion. (refer to figs. 4 & 5 for this section). The earliest magma of the Intrusion |  | | Journal (article/letter/editorial) | | are: 1) doming of the crust, followed by rifting; 2) âhot spotâ traces with timeâspace migrating magmatism;...(2014), http://dx.doi.org/10.1016/j.gr.2014.09.008 2 F. Pirajno / Gondwana Research xxx (2014) xxxâxxx...economic importance, as explained in the pages ahead. 2. Anorogenic alkaline plutonic and volcano-plutonic...alkaligraniteâsyenite (saturatedâoversaturated); and 2) ijoliteâcarbonatite (undersaturated). They are schematically...carbonatites in south-western Africa is shown in Fig. 2. 2.1. Brandberg The Brandberg alkaline complex (Hodgson |  | | Journal (article/letter/editorial) | | 2006), this complex includes aenigmatiteâaegirine, aegirineâriebeckite, and riebeckite granites of magmatic...contacts with foidolites were not found, while a zone of their inferred junction is characterized by the...albiteâmicro- cline and aegirineâalbite endocontact metasomatites developed in the junction zone of foidolite and...eastern slopes of Mt. Gremyakha, including the Aegirine Navolok area. At the territory of the massif,...bedrocks were exposed in the extended zone (2 Ă 10 km) of the Aegirine Navolok area and recovered from borehole |  | Yakovenchuk, V. N., Pakhomovsky, Y. A., Men'shikov, Y. P., Ivanyuk, G. Yu., Krivovichev, S. V., Burns, P. C. (2003) Chlorbartonite, K6Fe24S26(Cl,S), a new mineral species from a hydrothermal vein in the Khibina massif, Kola Peninsula, Russia: Description and crystal structure. The Canadian Mineralogist, 41 (2) 503-511 doi:10.2113/gscanmin.41.2.503 | Journal (article/letter/editorial) | | mineral in a microcline â pectolite â sodalite â aegirine vein within feldspathic urtite at Mount Koashva...Russia. The mineral occurs as roundish grains up to 2 cm across included in sodalite and natrolite crystals;...203â212, average 207 kg/mm2; the Mohs hardness is 4. The density is 3.70 g/cm3 (measured) and 3.65 g/cm3...tetragonal, I4/mmm, a 10.3810(8), c 20.614(2) Ă
, V 2221.5(3) Ă
3, Z = 2. The strongest eight lines in the X-ray...0.020 (447 unique observed reflections with Fo â„ 4Fo). The structure consists of a framework of the |  | Schwartz, StĂ©phane, Gautheron, CĂ©cile, Ketcham, Richard A., Brunet, Fabrice, Corre, Marianna, Agranier, Arnaud, Pinna-Jamme, Rosella, Haurine, FrĂ©dĂ©ric, Monvoin, Gael, Riel, Nicolas (2020) Unraveling the exhumation history of high-pressure ophiolites using magnetite (U-Th-Sm)/He thermochronometry. Earth and Planetary Science Letters, 543. 116359pp. doi:10.1016/j.epsl.2020.116359 | Journal (article/letter/editorial) | | mineral inclusions (titanite, chlorite and augite-aegirine). Both magnetite types crystallized during the...rocks only yield a few minerals suitable for geo- 2 S. Schwartz et al. / Earth and Planetary Science...subduction-collision zones. The MgHe method is based on radiogenic 4 He production and accumulation in the crystal lattice...history constrained by the ZFT and AFT literature data. 2. Geological setting The studied samples were collected...Tethyan ocean (Piedmont zone) and its northwestern European margin (Briançonnais zone). In the study area |  | | Journal (article/letter/editorial) | | SAO SEBASTIAO, BRAZIL B.I. KRONBERG 1, K. TAZAKI 2 and A.J. MELFI 3 1Department of Geology, Lakehead...S~o Paulo (Brazil) (Accepted for publication July 4, 1986 ) Abstract Kronberg, B.I., Tazaki, K. and Melfi...the basalt flooding of extensive areas ( > 10 s km 2) of southern South America in Mesozoic time (Ulbrich...which make them ideal for detailed geochemical study. 2. E x p e r i m e n t a l In the specimen selected...crust (zone 1 ) is lightyellow in colour with partially preserved primary rock textures. Zone 2 is reddish |  | | Report (issue) | | locations of typical outcrops _____________________ _ 1 2 2 6 7 7 7 Page Blue Ridge thrust sheet-Continued...and metamorphism not related to the Brevard fault zone --------------------------- 53 Foliation ----...Quartz monzonite gneiss _____________________ Aegirine-augite granite gneiss _______________ 36 40 41...window-Continued Structure-Continued Brevard fault zone Faults ------------------------------------ 105...metamorphic effects related to the Brevard fault zone ------------------------------Layering and foliation |  | | Journal (article/letter/editorial) | | Greenland. 1975 by . W. Ten Brink. (Meddr GrĂžnland 201 4). D.kr. 40.00 o. 114 Ferri-sepiolite in bydrothenna1...and a narrow marginal zone of alkali rich rocks. The rocks of the marginal zone consist of me!teigite...The bordering gneisses have a narrow fenitized zone. (2) A strongly alkaline and undersaturated dyke sequence...... Alkali-metasomatized dunites in the contact zone of uncompahgrite . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . The marginal zone. . . . . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | Copenhagen, Ăster Voldgade 10, 1350 KĂžbenhavn K, Denmark 2 Department of Mineralogy, Natural History Museum,...described from the island LaÌven in the Langesundfjord, Norway, by Erdmann (1840). Since then it has been described...the type locality LaÌven in the Langesundsfjord, Norway, and was obtained from the Geological Museum of...greenish-yellow in colour. Leuco9 is from the outer zone of an 8 cm wide irregular mass from a pegmatite...pegmatite on BarkevikskjĂŠr in the Langesundsfjord, Norway. It is colourless and was kindly made available by private |  | Kynicky, J., Chakhmouradian, A. R., Xu, C., Krmicek, L., Galiova, M. (2011) DISTRIBUTION AND EVOLUTION OF ZIRCONIUM MINERALIZATION IN PERALKALINE GRANITES AND ASSOCIATED PEGMATITES OF THE KHAN BOGD COMPLEX, SOUTHERN MONGOLIA. The Canadian Mineralogist, 49 (4) 947-965 doi:10.3749/canmin.49.4.947 | Journal (article/letter/editorial) | | Geological Sciences, Masaryk University, Kotlarska 2, CZâ611 37 Brno, Czech Republic Michaela GALIOVA...Faculty of Science, Masaryk University, Kotlarska 2, CZâ611 37 Brno, Czech Republic Abstract The western...emplacement): microcline-phyric granite, peralkaline aegirineâarfvedsonite granite (main intrusive phase) and...modal %), potassium feldspar (up to 35 modal %), aegirine (up to 11 modal %) and arfvedsonite (up to 12...accessory phases. Metasomatically altered samples (Fig. 2) contain FeâMn oxides, calcite and rare-earth fluorocarbonates |  | | Journal (article/letter/editorial) | | Faculty of Science, Ehime University, Bunkyo-cho 2-5, Matsuyama 790, Japan (Received 30 October 1989;...et al, 1970; {.Journal cf Petrology, VoL 32, P i n 2, pp. 333-364, 1991] © Oxford Univtnity Pren 1991...laumontite (Lm) zone is defined by the presence of laumontite. The prehnite-pumpellyite (Pr-Pp) zone is characterized...pumpellyite. The lawsonite-sodic. pyroxene (Lw-Napx) zone is defined by the assemblage lawsonite + pumpellyite...chlorite. The epidote-sodic pyroxene (Ep-Napx) (1) and (2) zones are characterized by the assemblage epidote |
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