The Edough Massif garnetites: evidences for a metamorphosed paleo-garnet beach-sand placer (Cap de Garde, Annaba, Northeast Algeria)

Soraya Hadjzobir, Uwe Altenberger, Christina Günter

Abstract


This study shows that the garnetites from the "Cap de Garde", Ain Achir beach, Edough Massif, Algeria, are metamorphosed clastic sediments enriched in garnet fragments like beach-sands or beach-placers. The garnets are embedded in a matrix composed of biotite and isometric grains of staurolite and quartz suggesting a former beach placer deposit. All garnets are zoned and show the same conspicuous angular core, with strong chemical contrast to their mantle.  These cores are interpreted as clasts of metamorphic origin and part of the placer deposit. The distinct chemical composition, morphology and recorded temperature history of the garnet cores relative to rims indicate that the garnets from the garnetites grew during a complex metamorphic history (amphibolite to granulite-facies). The garnetites are the equivalent of the dark portions of the modern light and dark sands at Ain Achir beach.


Keywords


Garnetites; Paleo; Beach-sand placers; Edough Massif; Algeria.

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References


Ahmed-Said Y., Leake B.E. 1992. The composition and origin of Kef Lakhal amphibolites and associated amphibolite and olivine- rich enclaves, Edough, Annaba, NE Algeria. Mineralogical magazine 56, 459-468

Ahmed-Said Y., Leake  B.E., Rogers, G. 1993. The petrology, geochemistry and petrogenesis of the Edough igneous rocks, Annaba, NE Algeria. Journal of African Earth Sciences 17: 1, 111-123

Ahmed-Said Y., Leake B.E., 1995. The petrogenesis of the Edough orthogneisses, Annaba, northeast Algeria. Journal of African Earth Sciences 21, 253-269

Ahmed-Said Y., Leake B.E., 1997. The petrogenesis of the Edough amphibolites, Annaba, NE Algeria; two unrelated basic magmas and the lherzolite-harzburgite residue of a possible  magma source. Mineralogy and Petrology 59, 207-237

Andà S., Morton A., Garzanti E., 2013. Metamorphic grade of source rocks revealed by chemical finger prints of detrital amphibole and garnet. Geological Society, London, Special Publications, 386, first published on June 20, 2013

Aubrecht R., Méres Š., Sýkora M., Mikus T., 2009. Provenance of the detrital garnets and spinels from the Albian sediments of the Czorsztyn Unit (Pieniny Klippen Belt, Western Carpathians, Slovakia). Geologica Carpathica 60, 463–483

Bossière G., Collomb P., Mahdjoub Y., 1976. Sur un gisement de Péridotites découvert dans le massif cristallophyllien de l'Edough (Annaba, Algérie). Comptes Rendus Géoscience 283, 885-888

Bruguier O., Hammo D., Bosch D., Caby R., 2009. Miocene incorporation of peridotite into the Hercynian basement of the Maghrebides (Edough massif, NE Algeria): Implications for the geodynamic evolution of the Western Mediterranean. Chemical Geology 261, (1-2) ,172-184

Brunnel M., Hammor D., Misseri M., Gleizes G., Bouleton J., 1988. Cisaillements synmétamorphes avec transport vers le Nord-Ouest dans le massif cristallin de l'Edough (Est Algérien). Comptes Rendus Géoscience 306, 1039-1045

Caby R., Hammor D., 1992. Le Massif cristallin de l'Edough (Algérie): un " Métamorphic Core Complex" d'âge miocène dans les Magrébides. Comptes Rendus Géoscience 314, 829-835

Caby R., Hammor D., Delor C., 2001. Metamorphic evolution, partial melting and Miocene exhumation of lower crust in the Edough metamorphic core complex, west Mediterranean orogen, eastern Algeria. Tectonophysics 342, 239-273

Corrie S.L., Kohn M.J., 2008. Trace-element distributions in silicates during prograde metamorphic reactions: implications for monazite formation. Journal of Metamorphic Geology 26, 451-464

Dorais M.J., Tubrett M., 2012.  Detecting Peritectic Garnet in the Peraluminous Cardigan Pluton, New Hampshire. Journal of Petrology 53, 2, 299-324

Dorais M.J.,  Spencer C.J., 2014. Revisiting the importance of residual source material (restite) in granite petrogenesis: The Cardigan Pluton, New Hampshire.  Lithos 202-2003, 237-249

Gleizes G., Bouloton J., Bossière G., Collomb P., 1988. Donneés lithologiques et pétro-structurales nouvelles sur le massif cristallophyllien de l’Edough (Est-Algérie). Comptes Rendus De L’ Academie Des Sciences 306, 1001-1008

HadjZobir S., Laouar R., Oberhaensli R., 2007. Les métabasites de Sidi Mohamed Edough NE Algérien Caractéristiques pétrographiques minéralogiques et géochimiques. Service Géologique National 18, 25-41

HadjZobir S., 2012. Impact de l’altération sur le bilan chimique des diatexites du massif de l’Edough (Annaba, NE Algérien) Estudios Geologicos 68, (2) 203-215

HadjZobir S., Mocek B., 2012. Determination of the source rocks for the diatexites from the Edough Massif (Annaba, NE Algeria). Journal of African Earth Sciences 69, 26-33

HadjZobir S., Oberhaensli R., 2013. The Sidi Mohamed peridotites (Edough Massif, NE Algeria): Evidence for an upper mantle origin. Journal of Earth System Science 122, 1455-1465

HadjZobir S., Altenberger U., Günter C., 2014. Geochemistry and petrology of metamorphosed submarine basic ashes in the Edough Massif (Cap de Garde, Annaba, northeastern Algeria). Comptes Rendus Géoscience 346,  244-254

Harley S.L., Kelly N.M., 2007. The impact of zircon-garnet REE distribution data on the interpretation of zircon U-Pb ages in complex high-grade terrains: An example from the Rauer Islands, East Antarctica. Chemical Geology 241, 62-87.

Hilly J., 1962. Etude géologique du massif de l’Edough et du Cap de Fer (Est-Constantinois). Bulletin du Service de la carte géologique de l'Algérie 19, 1-408

Kohn M.J., Wieland M.S., Parkinson C.D., Upreti B.N., 2005. Five generations of monazite in Langtang gneisses: implications for chronology of the Himalayan metamorphic core. Journal of Metamorphic Geology 23, 399–406

Kropáč K., Buriánek D., Zimák J., 2012. Origin and metamorphic evolution of Fe–Mn-rich garnetites (coticules) in the Desná Unit (Silesicum, NE Bohemian Massif). Chemie der Erde - Geochemistry 72, (3), 219-236

Lahondère J.C., Feinberg H., Haq B.U., 1979. Datation des grès numidiens d’Algérie orientale: conséquences structurales. Comptes Rendus de l'Académie des Sciences 289, 383-386

Locock A.J., 2008. An Excel spreadsheet to recast analyses of garnet into end-member components, and a synopsis of the crystal chemistry of natural silicate garnets. Computers and Geosciences 34, 1769-1780

Mange M.A., Morton A.C., 2007. Geochemistry of heavy minerals. In: Mange, M.A.,Wright, D.T. (Eds.), Heavy Minerals in Use. Developments in Sedimentology, 58. Elsevier, Amsterdam, pp. 345-391

Manzotti P., Ballèvre M., 2013. Multistage garnet in high-pressuremetasediments: Alpine overgrowths on Variscan detrital grains. Geology 4, 1151-1154

Méres Š., Hovorka D., 1991. Geochemistry and metamorphic evolution of the Kohút crystalline complex mica schists (the Western Carpathians). Acta Geologica et Geographica Universitatis Comenianae Geologica  47, 15-66

Méres Š., 2008. Garnets – important information resource about source area and parental rocks of the siliciclastic sedimentary rocks. In: Jurkovič. (Ed.): Conference “Cambelovedni 2008”. Abstract Book, Comenius Univ, Bratislava, 37-43 (in Slovak with English abstract).

Pett T.K., 2006. Garnetites of the Cardigan Pluton - Evidence for restite and implications for source rock compositions.  Master thesis, Bringham Young University, Utah

Rudnick R.L., Gao S.X., 2003. Composition of the Continental Crust. In: Roberta L. Rudnick (ed.): Treatise on Geochemistry, Volume  p.1-64 Elsevier

Selyatitskii A,Y., Reverdatto V.V., 2014. Protoliths of UHP Garnetites Associated with Diamond_Bearing Rocks near Kumdy_Kol Lake (Kokchetav Massif, Northern Kazakhstan). Doklady Earth Sciences 459, 423-1428

SONAREM (Société Nationale De la Recherche Minière) 1980 Projet Edough; Unpublished Data.

Spry P.G., Heimann A., Messerly J.D.,  Houk R.S., Teale G.S., 2004. Discrimination of metamorphic and metasomatic processes at the Broken Hill lead-zinc-silver deposit, Australia: Rare Earth Element signatures of garnet in garnet-rich rocks, Denver Annual Meeting Geological Society of America, Abstracts 36,  445

Win K.S., Takeuchi M., Iwakiri S., Tokiwa T., 2007. Provenance of detrital garnets from the Yukawa Formation, Yanase district, Shimanto belt, Kii Peninsula, Southwest Japan. Journal of the Geological Society of Japan 113,  133-145

Whitney D.L, Evans B.W., 2010. Abbreviations for names of rock-forming minerals. American Mineralogist 95 (1), 185-187

Yang P., Rivers T., 2001. Chromium and manganese zoning in pelitic garnet and kyanite: spiral, overprint and oscillatory (?) zoning patterns and the role of growth rate. Journal of Metamorphic Geology 19, 455-474

Zuleger E., Erzinger J., 1988. Determination of REE and Y in silicate materials with ICP-AES. Fresenius' Zeitschrift für Analytische Chemie 332, 140-143


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