 | | Journal (article/letter/editorial) | | Zebane dyke swarm ĆŸPan-African Tuareg shield, Algeria /: prevalent mantle signature and late agpaitic...located along the western boundary of the Archaean In Ouzzal rigid terrane, but inside the adjacent Tassendjanet...at that period. No crustal contamination occurred in the genesis of the Tin Zebane swarm. Even the samples...granites: this geochemical signature is interpreted in terms of extensive differentiation effects due to...aegirine, zircon, titanite, allanite and possibly fergusonite, separated from the liquid in the swarm itself |  | | Book | | at researchers, students, and everyone interested in geology. The series includes peer-reviewed monographs...Science and Technology Houari Boumediene Algiers, Algeria Zakaria Hamimi Department of Geology Benha University...Science and Technology Houari Boumediene Algiers, Algeria Basem Zoheir Department of Geology Benha University...Science and Technology Houari Boumediene Algiers, Algeria ISSN 2197-9545 ISSN 2197-9553 (electronic) Springer...recitation, broadcasting, reproduction on microïŹlms or in any other physical way, and transmission or information |  | | Journal (article/letter/editorial) | | Springer-Verlag 1995 Gold mineralization in the West Hoggar shear zone, Algeria K. Ferkous 1, M. Leblanc 2 10...M., 8 rue des Aur6s, E1 Harrach, 16000 Alger, Algeria 2 C.N.R.S., Centre G6ologiqueet G6ophysique,Un...fault of the Pharusian Belt of the Tuareg Shield (Algeria). The Amesmessa shear zone is asymmetric: strong...biotitic ultramylonites are in contact with a rigid Archean complex (In Ouzzal block), whereas there is...(pyrite, galena, native gold, sphalerite) crystallized in the deformed quartz matrix along late shear planes |  | | Report (chapter) | | Comparisons between the northwestern Borborema Province, NE Brazil, and the southwestern Pharusian Dahomey...Comparisons between the northwestern Borborema Province, NE Brazil, and the southwestern Pharusian Dahomey...Brasiliano Borborema Province are described and compared with their counterparts in the Pan-African Dahomey...West Gondwana assembly. In the MeÌdio CoreauÌ domain, NW Borborema Province, U âPb and Smâ Nd data have...with large tracts of 2.15â 2.10 Ga juvenile gneisses in the CearaÌ Central domain. These basement blocks |  | | Journal (article/letter/editorial) | | associated carbonatites (In Ouzzal Proterozoic granulites, Hoggar, Algeria) S . F OU RC A DE , 1 J ....B.P. 9, Dar el Beida, Algiers, Algeria A B S TR A CT The In Ouzzal granulitic unit (IOGU ) consists...metamorphism. Most of the isotopic variation in the marbles is explained in terms of pregranulitic features. Metasomatic...with respect to these elements, a relative depletion in Nb, Ta, Hf, Zr and Ti. The isotopic compositions...signatures. The zones of metasomatic alteration in the In Ouzzal granulites may be the deep-seated equivalents |  | | Journal (article/letter/editorial) | | Special Issue Palaeoproterozoic UHT metamorphism in the Lewisian complex and North Atlantic region Sotaro...temperature (UHT) metamorphism of the Lewisian complex in South Harris and the North Atlantic regions were...The characteristic features of the UHT metamorphism in the South Harris can be summarized as a) mineral...established UHT metamorpism in South Harris is the emplacement of igneous suite in the magmatic arc at c.... 2.18 â 1.87 Ga. In the North Atlantic region, possible UHT metamorphism were reported from the Boothia |  | PEUCAT, J.-J., CAPDEVILA, R., DRARENI, A., CHOUKROUNE, P., FANNING, C. M., BERNARD-GRIFFITHS, J., FOURCADE, S. (1996) Major and trace element geochemistry and isotope (Sr, Nd, Pb, O) systematics of an Archaean basement involved in a 2.0 Ga very high-temperature (1000oC) metamorphic event: In Ouzzal Massif, Hoggar, Algeria. Journal of Metamorphic Geology, 14 (6) 667-692 doi:10.1111/j.1525-1314.1996.00054.x | Journal (article/letter/editorial) | | basement involved in a 2.0 Ga very high-temperature (1000 °C) metamorphic event: In Ouzzal Massif, Hoggar...Hoggar, Algeria J . - J . P E U CAT, 1 R . CA P DE V I LA , 1 A . D R AR E NI , 2 P . CH O UK R OU NE , 1*...USTHB, Institut des Sciences de la Terre, Algiers, Algeria 3 Research School of Earth Sciences, ANU, Canberra...CT The In Ouzzal granulitic massif is composed mainly of various meta-igneous rocks which, in spite of...high-Mg tholeiitic basalts similar to the suites found in Archaean greenstone belts and (3) calcalkaline protoliths |  | Montero, P., Haissen, F., Mouttaqi, A., Molina, J.F., Errami, A., Sadki, O., Cambeses, A., Bea, F. (2016) Contrasting SHRIMP UâPb zircon ages of two carbonatite complexes from the peri-cratonic terranes of the Reguibat Shield: Implications for the lateral extension of the West African Craton. Gondwana Research, 38. 238-250 doi:10.1016/j.gr.2015.12.005 | Journal (article/letter/editorial) | | doi: 10.1016/j.gr.2015.12.005 GR 1561 To appear in: Gondwana Research Received date: Revised date:...review of the resulting proof before it is published in its ïŹnal form. Please note that during the production... MA forms part of the West Reguibat Alkaline province. Twihinate, on the other hand, is much younger...carbonatites of the famous TE Richat Structure in the southwest Reguibat Shield. Like these, the Twihinate...however, a Paleoproterozoic component that is not found in the neighboring western Reguibat Shield. The 421 |  | Saraiva dos Santos, Ticiano J., Garcia, Maria da GlĂłria M., Amaral, Wagner Silva, Caby, Renauld, Wernick, Eberhard, Arthaud, Michel H., Dantas, Elton L., Santosh, M. (2009) Relics of eclogite facies assemblages in the CearĂĄ Central Domain, NW Borborema Province, NE Brazil: Implications for the assembly of West Gondwana. Gondwana Research, 15 (3) 454-470 doi:10.1016/j.gr.2009.01.003 | Journal (article/letter/editorial) | | eclogite facies assemblages in the CearĂĄ Central Domain, NW Borborema Province, NE Brazil: Implications...o Article history: Received 2 July 2008 Received in revised form 23 December 2008 Accepted 6 January...Available online 18 January 2009 Keywords: Borborema Province Geochemistry Retrograded eclogites Subduction...a c t The Borborema Province, in the NE of Brazil, is a rather complex piece in the BrazilâAfrica puzzle...(Ghana, Benin, Togo, and Mali) and the Borborema Province involves the MĂ©dio CoreaĂș and Central CearĂĄ domains |  | | Book | | recitation, broadcasting, reproduction on microïŹlms or in any other physical way, and transmission or information...trademarks, service marks, etc. in this publication does not imply, even in the absence of a speciïŹc statement...are safe to assume that the advice and information in this book are believed to be true and accurate at...scientiïŹc papers on mineral deposits of North Africa. In total, 22 papers report new ïŹeld and laboratory data...data on diverse types of metallic deposits in Morocco, Algeria, Tunisia, Mali, Mauritania, Egypt, Sudan |  | | Journal (article/letter/editorial) | | elsevier.com/locate/chemgeo The solubility of fluorite in H2O and H2OâNaCl at high pressure and temperature...90095-1567, USA Received 14 August 2006; received in revised form 12 March 2007; accepted 29 March 2007...solubility of fluorite in H2O and H2OâNaCl has been measured at 600â1000 °C, 0.5â2.0 GPa in a pistonâcylinder...indicate that the concentration of fluorite dissolved in H2O is low at 600 °C and 0.5 GPa (0.0014 mol/kg H2O)...molality of CaF2, T is in Kelvin, and P is in GPa. Fluorite solubility was also measured in H2OâNaCl fluids |  | | Book | | THE PRE-CAMBRIAN IN NORTH AFRICA âą Digitized by the Internet Archive in 2023 with funding from...Foundation https ://archive .org/detai ls/precambrian in nor0000h mes SCENERY NEAl{ AI1' ABDALLAH \\'estern...Pre-Can1brian TI. To the left thl·re are bvo conical hills in \\'hich laYas oi Pre-Cambrian I II outcrop, dipping...olive trees I \rgand ) l'nder the cultivated areas in the foreground-terraced and rather Jo,v walb -conglo1nerates...Photography by ltoman T(arpoff THE PRE-CAMBRIAN IN NORTH AFRICA BY âą âą H. M. E. SCHURMANN PH. D. |  | Chakhmouradian, A.R., Mumin, A.H., DemĂ©ny, A., Elliott, B. (2008) Postorogenic carbonatites at Eden Lake, Trans-Hudson Orogen (northern Manitoba, Canada): Geological setting, mineralogy and geochemistry. Lithos, 103 (3) 503-526 doi:10.1016/j.lithos.2007.11.004 | Journal (article/letter/editorial) | | Lake pluton in the Trans-Hudson Orogen is the first known occurrence of carbonatites in Manitoba. The...combination of crystal fractionation and fluid release in the final evolutionary stage (crystallization of...as branching veins and lenticular bodies up to 4 m in thickness showing crosscutting relations with respect...digestion. The bulk of the carbonatites are composed of (in order of crystallization): SrâREE-rich fluorapatite...bastnĂ€site(Ce) (both as primary inclusions in calcite), NbâZrârich titanite, low-Hf zircon, allanite-(Ce) and |  | | Journal (article/letter/editorial) | | Heidelberg, Germany Received 12 September 2006; received in revised form 8 June 2007; accepted 26 June 2007 Editor:...provenance studies. The study area is the Erzgebirge in eastern Germany, where metamorphic rocks ranging...show that rutile geochemistry is a powerful tool in provenance studies, allowing for the identification... The log (Cr/Nb) ratio has proven to be decisive in discriminating between mafic and metapelitic lithologies...high-grade metamorphic conditions, such as those found in the Erzgebirge, more than 65% of rutiles do not re-equilibrate |  | | Journal (article/letter/editorial) | | Algiers, Algeria b a r t i c l e i n f o Article history: Received 3 November 2011 Received in revised...c t In this paper, we show with examples that cratons involved in intercontinental collisions in a lower... leading to the transformation of their margins. In some cases, craton interiors can also be shaped by...distinctive characteristics (not all are present in each metacraton) are: (1) absence of pre-collisional...generated by subduction, leading to high gradient in strain and metamorphic intensity; (3) preservation |  | Santos, Roberto Ventura, Santos, Edilton J. dos, Neto, JoĂŁo Adauto de Souza, Carmona, Luis Christian Montreuil, Sial, Alcides NĂłbrega, Mancini, Luis Henrique, Santos, Lauro CĂ©zar Montefalco de Lira, Nascimento, GilzĂȘnia Henrique do, Mendes, Lucas UpaDafubigin Santos, AnastĂĄcio, Emerson Marcello Ferreira (2013) Isotope geochemistry of Paleoproterozoic metacarbonates from Itatuba, Borborema Province, Northeastern Brazil: Evidence of marble melting within a collisional suture. Gondwana Research, 23 (1) 380-389 doi:10.1016/j.gr.2012.04.010 | Journal (article/letter/editorial) | | Paleoproterozoic metacarbonates from Itatuba, Borborema Province, Northeastern Brazil: Evidence of marble melting... Article history: Received 12 June 2011 Received in revised form 13 February 2012 Accepted 15 April 2012...Paleoproterozoic Marbles Collisional suture Borborema Province a b s t r a c t Strongly-deformed marbles may...such as has been described in the Himalayas and in the Eastern Ghats, India. In the Alto MoxotĂł Terrane...a high-grade gneissic domain of the Borborema Province, Northeastern Brazil, there are metacarbonates |  | Nasdala, Lutz, Wenzel, Marita, Vavra, Gerhard, Irmer, Gert, Wenzel, Thomas, Kober, Bernd (2001) Metamictisation of natural zircon: accumulation versus thermal annealing of radioactivity-induced damage. Contributions to Mineralogy and Petrology, 141 (2) 125-144 doi:10.1007/s004100000235 | Journal (article/letter/editorial) | | the radiation damage generated in a-decay events is a common phenomenon in natural zircons. We have studied...spectroscopic measurements. Raman band broadening in wellordered to moderately metamict zircons that have...a calibration line for examining unknown zircons in order to consider complete or incomplete damage storage...Data for unknown zircons. Tables have been deposited in electronic form and can be obtained from http://dx...anneal heterogeneously, with preferred re-ordering in more damaged micro-areas. Results suggest that single |  | PATEL, , FROST, , CHAMBERLAIN, , SNYDERâ , (2001) Proterozoic metamorphism and uplift history of the north-central Laramie Mountains, Wyoming, USA. Journal of Metamorphic Geology, 17 (3) 243-258 doi:10.1046/j.1525-1314.1999.00201.x | Journal (article/letter/editorial) | | PATE L* , B . R . F R OS T , K . R . C HA MB E R L A IN A ND G. L . S NY DE R â Department of Geology and...Proterozoic kyanite-grade Barrovian metamorphism. In contrast, in the Laramie Peak block, north of the shear...facies metamorphism that is Archean in age. Peak mineral assemblages in the Palmer Canyon block include (a)...kyanite in the pelitic schists; (b) quartzâbiotiteâplagioclaseâlow-Ca amphibolesâkyanite in MgâAl-rich...schists, and locally (c) hornblendeâ plagioclaseâgarnet in amphibolites. All rock types show abundant textural |  | Macdonald, Ray, BagiĆski, BogusĆaw, Belkin, Harvey E., Stachowicz, Marcin (2019) Composition, paragenesis, and alteration of the chevkinite group of minerals. American Mineralogist, 104 (3) 348-369 doi:10.2138/am-2019-6772 | Journal (article/letter/editorial) | | members with predominant Mg, Al, Mn, Cr, Sr, or Zr in one of the cation sites are also known. Twelve members...recorded in lunar and martian rocks. The main occurrences are in igneous rocks ranging from diamond in kimberlites...also occur in metamorphic rocks, including granulites, metacarbonates, and jadeitites, and in metasomatic...metasomatic rocks, such as skarns and fenites, and in rare-metal deposits. Chevkinite-group minerals may form...has been done in determining CGM-melt partition coefficients, yet such data are critical in, inter alia |  | | Journal (article/letter/editorial) | | petrogenetic grids and pseudosections are presented in the FeOâMgOâAl2O3âSiO2âH2O (FMASH), Na2OâCaOâK2O...to investigate quantitatively the phase relations in these rocks. Although the bulk compositions of c...cordieriteâorthoamphibole gneisses are close to FMASH, calculations in this system do not adequately account for the observed...Calculations in NCKFMASH and NCKFMASHTO highlight the role of minor constituents such as Ca, Na and Fe3+ in the...q, quartz; ru, rutile; sill, sillimanite; sph, titanite; st, staurolite; ta, talc. INTRODUCTION Over |  | | Journal (article/letter/editorial) | | 1016/j.precamres.2015.05.028 PRECAM 4278 To appear in: Precambrian Research Received date: Revised date:...review of the resulting proof before it is published in its final form. Please note that during the production...Abstract The West African Craton is highly endowed in minerals, and their spatial and temporal 22 distribution...and formed during distinct mineral epochs: 24 (1) In both Archean Shields (KĂ©nĂ©ma-Man and Reguibat) and...28 between two intervals at ca. 2.2 - 2.0 Ga and in the Mesozoic. 29 (2) Across Pan-African and Variscan |  | | Journal (article/letter/editorial) | | phlogopite mines active in the early 1900s in the Mont-LaurierâBancroft corridor in the Central Metasedimentary...Metasedimentary Belt of the Grenville Province, the Parker mine is exceptional because of the association of...Euhedral crystals of these minerals are found âfrozenâ in a carbonate matrix. The carbonate dike and segregations...to calcite + dolomite. Hematite appeared as flakes in the melt owing to net loss of hydrogen, and the spinel...Such globules, where present in the cumulate, are more pristine than in the coarse crystal of spinel |  | Nasdala, Lutz, Reiners, Peter W., Garver, John I., Kennedy, Allen K., Stern, Richard A., Balan, Etienne, Wirth, Richard (2004) Incomplete retention of radiation damage in zircon from Sri Lanka. American Mineralogist, 89 (1) 219-231 doi:10.2138/am-2004-0126 | Journal (article/letter/editorial) | | 219â231, 2004 Incomplete retention of radiation damage in zircon from Sri Lanka LUTZ NASDALA,1,* PETER W. REINERS...ABSTRACT A suite of 18 zircon gemstones from placers in the Highland/Southwestern Complex, Sri Lanka, were...U-Th-Pb age determinations. Zircon samples described in this study are virtually homogeneous. They cover...this has often resulted in significant underestimation of radiation effects in zircon. We suggest to estimate...metamictization process and its structural and chemical effects in natural zircon has been done on gem-quality samples |  | | Journal (article/letter/editorial) | | Research Tectono-metamorphic Events in the North Atlantic Region in the Palaeoproterozoic from the View...View Point of High-grade Metamorphic Rocks in the Lewisian Complex, South Harris, NW Scotland Sotaro Baba*...The tectono-thermal history of the Lewisian Complex in South Harris (South Harris Complex) was inferred...the subduction-related accretionary complex formed in the palaeo convergent margin. The complex has suffered...collision has been recognized in the Lapland-Kola belt and New Quebec in the Palaeoproterozoic. This suggests |  | | Report (chapter) | | April 3, 2015 Geology of the northern Borborema Province, NE Brazil and its correlation with Nigeria, NW...Brazil and NW Africa, respectively, are key areas in the amalgamation of West Gondwana by continental...crust but no known Palaeoproterozoic rocks .2.0 Ga; in NE Brazil, 2.6â3.5 Ga Archaean rocks form small cores...Brazil (,0.65 Ga) is similar to the Igarra Sequence in SW Nigeria. The CearaÌ Group, which may date back...an oceanic domain. In both provinces, basement and sedimentary cover were involved in tangential tectonics |
|
