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| and Dwyka diamictites from South Africa: Search for an extraterrestrial component HEINZ HUBER,1 CHRISTIAN...University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria School of Earth and Environmental Sciences, University...tillite/diamictite layers could represent impact breccias. An earlier petrographic study of rock and mineral clasts...elements, especially iridium, could be indicative for an impact origin. By use of ␥-␥ coincidence spectrometry...neither geochemical nor petrographic evidence supports an impact origin of the diamictites from the Dwyka Group |
 | Koroneos, Antonios, Kilias, Adamantios, Avgerinas, Asterios (2013) Hercynian plutonic rocks of Voras Mountain, Macedonia, Northern Greece: their structure, petrogenesis, and tectonic significance. International Geology Review, 55 (8) 994-1016 doi:10.1080/00206814.2012.758830 | Journal (article/letter/editorial) |
| ± 3 Ma) Voras plutonic rocks intrusive into the lower part of the Pelagonian nappe pile (East Pelagonian...60% crystallization) and concurrently mixed with an acid magma, of composition similar to the more acid...al. 1990; Kilias et al. 1999, 2002; Jolivet and Brunn 2010; Ring et al. 2010). On the contrary, the tectonic...(Mountrakis 1986; Kilias et al. 1989a). It forms an elongate NNW–SSE-trending nappe pile of continental...of the Pelagonian nappe pile (Figures 2 and 3; Brunn 1956; Nance 1981; Mountrakis et al. 1983, 1987; |
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| (Eriksson 1978, 1979, Lowe & Knauth 1977, 1978, von Brunn & Hobday 1976 ), Western Australian (Barley et a11979...and dynamic periods of earth history and possess an immense potential for 0084-6597/80/0515-0145$01...cratonization. The 3.0 b.y. old Pongola Supergroup (von Brunn & Hobday 1976) and slightly younger Dominion Reef...1975) were deposited mainly by fluvial processes in an intracratonic basin. These types of stable shelf...be a facies of the upper Kromberg Formation and lower Fig Tree Group. B. Eastern Pilbara Block, Western |
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| (-490 Ma) Natal Group crops out sporadically within an elongate basin in eastern KwaZulu-Natal, from Ulundi...with much of the Natal Group detritus derived from an elevated source area to the north rather than the...(1994), Liu and Cooper (1998) and Marshall and von Brunn (1999). However, the newly described Natal Group...Lindsay, 1999; Marshall 1999; Marshall and von Brunn, 1999). The only previously documented geological...matrix-supported with rounded quartz grains set in an illite/sericite matrix. Fine-grained grains of muscovite |
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| Pongola Supergroup, South Africa (Mason and Von Brunn, 1977; Beukes and Lowe, 1989; Dixon, 2004). Palaeoarchaean...sediments were supplied from the northwest (Von Brunn and Hobday, 1976; Beukes and Cairncross, 1991; Gold...244–264 Formation overlies granitoid basement along an irregular contact and consists of coarse-grained...tide-dominated, marine setting (Mason and Von Brunn, 1977; Von Brunn and Mason, 1977; Beukes and Lowe, 1989)...partly replaced, by dolomite) are referred to as the lower, main, middle, and upper carbonate sections (Figs |
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| vertical tectonics from Upper Miocene to Quaternary. An intervening stage of andesitic-dacitic magmatism... The porphyroids could represent the products of an acid volcanism of anatectic origin which followed...prasinites could be metamorphic rocks belonging to an ophiolitic suite, tectonically pinched in the Triassic...latite-type average composition, and has suggested an origin by differentiation from a potash-basaltic...contain orthoclase; others contain microcline. There is only one example of an acidic granitite with no potash |
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| (6) quartz,spodumene (or petalite),(7) quartz,microcline or perthite,(8) quartz,and (9) lepidoliteor lithian...lithian mica, plagioclase, quartz,microcline. Assemblages $ and 5 are subdividedto showverticalchangesin...magmaticprocesses and which call for other processes. It can be an aid in mappingpegmatitesand workingout their internalstructure...Lepidolite-plagioclase-quartz 9 Quartz-microcline 10 Microcline-plagioclase-lit hia micas-quartz 11...muscovite 4 Perthite-quartz 5 Perthite- (or microcline-) Victory White Cap X X Buster Highland |
 | | Report (chapter) |
| meso-autochthonous sediments of Middle Cretaceous to Lower Tertiary age. In the Eohellenic Nappe, as well as...pelagic sediments which were overthrust during the Lower Cretaceous. The latter constitute the Eohellenic...coarse quartz-conglomerates and meta-arkoses in its lower part. On Skiathos and in the Sarakiniko mountain...meta-volcanics of spilitic character, passing into an upper series of meta-graywackes and schists. In...Skopelos and Alonnisos. Towards the end of the Lower Cretaceous, the whole region again subsided below |
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| I C A L P A P E R S , 1887. By H. A. M~RS, M.A.. An~IACHA~I~S. ACANTHITE. AC~IITE. ACTINOLITE-SCIIIST...Macpherson. Ann. Soc. Esp. Hist. Nat. xvl. p. 237. .An- dalusia. A~PHTDOLV,-lmCXS. A~cIT~.. A~ATASE. ...xxxix, p. 263. Loc. A. Makowsky. ~erh. Nat. Ver. Brunn. xxvi. p. 39. Tre- bitsch. Bo~sosrrz. Bm~UNI~....p. 390. Twinned, ~hem. rid. Adularia, Albite, Microcline, Plagioclase. H. Lenk. Verh. Phys. Ges. Wiirz... 274. 8~ec. heat. A. Makowsky. Verb. Nat. Vet. Brunn. xxvi. p. 21. Moravia. A. Lacroix. Bull. See. Min |
 | Aliani, Farhad, Maanijou, Mohammad, Sabouri, Zahra, Sepahi, Ali Asghar (2012) Petrology, geochemistry and geotectonic environment of the Alvand Intrusive Complex, Hamedan, Iran. Geochemistry, 72 (4) 363-383 doi:10.1016/j.chemer.2012.05.001 | Journal (article/letter/editorial) |
| Chemie der Erde 72 (2012) 363–383 Contents lists available at SciVerse ScienceDirect Chemie der Erde...is located near Hamedan (Iran) and crops out over an area 400 km2 intruding the Sanandaj-Sirjan plutono-metamorphic...characteristics typical of magmatic arc intrusions related to an active continental margin. Depletion in Ti, Nb, Ta...enrichment in K, Rb, Cs, Th, and LREE are consistent with an arc setting associated with the subduction of Neo-Tethyan...to subduct beneath the Eurasian plate. This led to an early Cimmerian metamorphic event, recorded in the |
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| L. STU TEN BEC KER, C . HEU BEC K AN D A. ZE H The Lomati Delta Complex: A prograding tidal delta in...high tidal range in the Archean (Hobday and Von Brunn, 1976) and the lack of stabilizing vegetation (Fuller...Our data show an estuary fed by erosion from an adjacent source area that built into an elongate, current-swept...of Exeter user L. STU TEN BEC KER, C . HEU BEC K AN D A. ZE H Figure 1. Location and general geology...adjacent units at high angles (Figure 2b). In addition, an unknown but high number of irregularly spaced, n |
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| Das Menderes Massiv ist ein alpinotypes Gebirge der West-Tfirkei und besteht aus drei tektonisch-lithologischen...Isotopenanalysen, die an einer metasediment/iren und migmatitischen Gesteinsserie yore Sfidrand (Typ A) und an einer...durchgefiihrt wurden. Die Rb-Sr-Gesamtgesteinsisochrone der Gesteine (Typ A) definiert ein Alter yon 502 + 10...wurde als Zeitraum der Migmatisierung interpretiert. Die Rb-Sr-Gesamtgesteinsisochrone der Gesteine (Typ B)...Alterswert als Intrusionsalter gedeutet wird. Der Zeitraum der Kristallisation alpiner Mineralparagenesen |
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| in five series corresponding of the Museum, and an to the Departments Historical series. Parts will...characterized also by an abundance of garnet and scarcity of sillimanite. A partial analysis of an almandine is...Deception and other South Shetland islands are given. An analysed olivine basalt from off the Balleny Islands...ankaramites from the Tristan da Cunha group of islands, and an analysed picritic basalt dredged off Dronning Maud...were described some years ago but it would seem that an up-to-date account of the entire collection, together |
 | | Report (chapter) |
| structure of the Alanya Massif, Southern Turkey: an allochthonous composite tectonic sheet A. I. Okay...relatively thin schist unit metamorphosed under lower greenschist facies conditions. The absence of HP/LT...(Blumenthal 1951). Here we show the Alanya Massif to be an allochthonous, composite tectonic slice overlying...together during the Upper Cretaceous and Tertiary (Brunn et al. 1971; 0zgiil & Arpat 1973; Ozgiil 1976)....regional dip, such that the coastal area presents an oblique cross-section through the Alanya Nappes (Fig |
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| point, as well as the concept of the formation of an active continental margin above the subducting Palaeotethys...geochronological results The Hellenides constitute an integral part of the AlpineHimalayan orogenic belt...Baba Mt. pluton yielded a linear array equivalent to an age of 289 ± 12.5 Ma (Katerinopoulos et al. 1992)...analyses on zircons from quartz monzonites yielded an age of 302.4 ± 5/15 Ma (Mountrakis 1983). A Permo-Carboniferous...blueschist 271 grade metamorphism, followed by an Early Cretaceous (114–110 Ma), epidote-amphibolite |
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| GEOCHEMISTRY OF MIXED-LAYER ILLITE-SMECTITES FROM AN EXTENSIONAL BASIN, ANTALYA UNIT, SOUTHWESTERN TURKEY...increasing dD values with increasing diagenetic grade. Lower dD values for these I-S samples are characteristic...controlled by diagenetic grade and can be used as an additional tool for understanding the basin maturity...1987; Robinson and Bevins, 1986). Temperature is an important factor in certain types of basins because...present study focused, therefore, on the Antalya Unit, an allochthonous body of strata from the Tauride-Anatolide |
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| development of an overpressurised subglacial meltwater system during drumlin formation: an example from...diamictons exposed within a longitudinal section through an elongate drumlin located to the west of Cemlyn Bay...and Shilts, 1974; Christiansen et al., 1982; von Brunn and Talbot, 1986; Burbridge et al., 1988; Dreimanis...side of the Cemlyn Nature Reserve (note presence of an undulating crest line to the drumlin); and (e) photomontage...photomontage of the exposed section through an elongate, NE–SW-trending drumlin located to the west of |
 | | Book |
| • An illustrated Encyclopedia of the World's Rocks and Minerals L......- , 1-. r S INER.!. l • A...Dusan Slivka First published in 1986 by Spring Books an imprint of The Hamlyn Publishing Group Limited, a...closely associated, which can be demonstrated by an example of certain ore concentrations. As a result...Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...pyrolusite have originated. Living organisms also take an active part in the process of mineral weathering |
| | Book |
| DuSan Slivka First published in 1986 by Spring Books an imprint of The Hamlyn Publishing Group Limited, a...closely associated, which can be demonstrated by an example of certain ore concentrations. As a result...Such metals as Cu, Ag and Zn often pass from a lower oxidation zone to a deeper cementation zone where...pyrolusite have originated. Living organisms also take an active part in the process of mineral weathering...is harder and the test may proceed to the next lower grade. Not much force on the scratching point is |
 | | Report (issue) |
| 150 published analyses an average of the major elements in each class and an arithmetic mean for sandstone...on minor and trace elements have been summarized. An approximate average has been estimated for these...overwhelming dominance of silica, alumina is commonly an important constituent. The orthoquartzites of Krynine...of silica or as a building stone; or the rock is an unusual or rare type, perhaps glauconitic or phosphatic...designation or denning limits class in question and not an objectively and statistically are still subjects |
 | Rahmani Javanmard, Somayeh, Tahmasbi, Zahra, Ding, Xing, Ahmadi Khalaji, Ahmad, Hetherington, Callum J. (2018) Geochemistry of garnet in pegmatites from the Boroujerd Intrusive Complex, Sanandaj-Sirjan Zone, western Iran: implications for the origin of pegmatite melts. Mineralogy and Petrology, 112 (6) 837-856 doi:10.1007/s00710-018-0591-x | Journal (article/letter/editorial) |
| / Accepted: 9 May 2018 # Springer-Verlag GmbH Austria, part of Springer Nature 2018 Abstract Pegmatite-hosted...plagioclase (albite), and alkali feldspar (orthoclase-microcline), as well as garnet, muscovite, fluorapatite...abundances with nearly flat patterns (YbN/SmN = 0–508), lower LREE contents, and negative Eu anomalies (Eu/Eu*...magmas demonstrating that garnet crystal-chemistry is an important tool for deciphering the origins of pegmatite...compositional zoning and inclusion assemblage may be an indicator of growth history and magma fractionation |
 | | Book |
| Association of Canada JSB!\I 0-921294-39-5 Preamble At an advanced stage in the production of our Special Publication...investigations along the eastern coast of Canada. An additional attraction to me was the parallelism that...Greenland. As with Special Publication 6, there was an instance where the authors were unable to track down...expect to have amassed the material necessary to write an enlightening article for Matrix on this poorly known...metamorphosed. Four major structural units can be recognized. An old Archean craton, with some of the oldest rocks |
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| Greece are intrusive into metamorphic rocks of the Lower Tectonic Unit of the Rhodope Massif. They are characterized...HRM plutons are high-level intrusions emplaced in an extensional (Dinter et al. 1995), post-collisional...1989; Jones et al. 1992). The Pangeon granitoids of Lower Miocene age (Eleftheriadis et al. 1999; 2001) are...Bulgarian-Greek border, is regarded as an eastern extension of the Alpine belt occupying an intermediate position between...Dinaride-Hellenide branch in the southeast (Brunn 1964). It was considered formerly as an old consolidated massif (“Zwischengebirge” |
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| continuous diffusion of this type would result in an array of ages similar, for the most part, to that...from the Jamestown contact zone were collected along an east-west traverse starting at the contact at lat...tlie Eldora and Jamestown, Colorado, stock:g. The lower chord illustrates tlie pattern to h: expected for...samples. solid eixclesare Jamestown samples. this lower intercept age of 60 million years wi~h the known...matrix, and as the contact is approached there is an increase in the amount of clear zircon in the form |
 | Jacobs, J., Bauer, W., Spaeth, G., Thomas, R. J., Weber, K. (1996) Litholog and structure of the Grenville-aged (≈1.1 Ga) basement of heimefrontfjella (East Antarctica) Geologische Rundschau, 85 (4) 800-821 doi:10.1007/bf02440112 | Journal (article/letter/editorial) |
| lithological assemblages, although each is made up of an early supracrustal sequence of metavolcanic and/or...und Forschungsgebiet Geologie, Endogene Dynamik der RWTH Aachen, Lochnerstr. 4-20, D-52056 Aachen, Germany... RSA K. Weber Institut for Geologie und Dynamik der Lithosph~ire, Goldschmidtstr. 3, D-37077 G6ttingen...shear fabrics (DI), succeeded by the initiation of an important (Dz) steep dextral shear zone (Heimefront...fabrics and structures were steepened and rotated in an anticlockwise sense. The HSZ is a curvilinear structure |
