ALİ RIZA ÇOLAKOĞLU

Geochemical and Mineralogical Characteristics of Fe-Ni Laterite Ore of Sarıçimen (Çaldıran-Van) Area in Eastern Anatolia, Turkey

The Sarıçimen Fe-Ni laterite ore is located 15 km east of Çaldıran County, northeast of Lake Van. This area is situated in the eastern Anatolia accretionary complex of Turkey, close to the Iran boundary. It is the first transported Fe-Ni rich laterite to be described from this area. This paper concentrates on the mineralogical and textural features of the ore minerals and the transported Fe-Ni laterite zone. These transported laterites are very inhomogeneous and contain very abundant zoned chromite grains, which have been altered to magnetite. SEM/probe investigations indicate that Fe-Ni is depleted in the core chromite and increases in the magnetite rim. A sedimentary transported laterite zone exhibits a high proportion of silcretes and ferruginous materials and chemically contains 29-61wt% SiO2 and 11.8-48.7 wt% Fe2O3. The average contents of Al2O3, TiO2, MnO and P are 4.81, 0.37, 0.32, and 0.03 (all in wt%) respectively. The highest Ni value obtained from the transported lateritic ferruginous zone is 1.16 wt%. The Pt and Pd concentrations are low, ranging from 39 ppb to 6 ppb and 21 ppb to 5 ppb, respectively. The Au value reaches up to 3 ppb. The diversity in chemical compositions of transported laterites is related to fracturing, erosion, corrosion, transportation, quantity of clastic material with different alteration history and diagenesis.

Anahtar Kelimeler:

Van, ophiolite, Fe-Ni laterite, eastern Anatolia, Turkey

Geochemical and Mineralogical Characteristics of Fe-Ni Laterite Ore of Sarıçimen (Çaldıran-Van) Area in Eastern Anatolia, Turkey

Keywords:

Van, ophiolite, Fe-Ni laterite, eastern Anatolia, Turkey,

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ALBANDAKIS, N.D. 1980. The nickel-bearing iron-ores in Greece. UNESCO IGCP 169 International Symposium on Metallogeny. Mafic Ultramafic Complexes 1, 194−213.
BOCCALETTI, M., MANETTI, P. & PECCERILLO, A. 1974. The Balkanides as an instance of back arc thrust belt: Possible relation with the Hellenides. Geological Society of American Bulletin 85, 1077−1084.
DALVI, A.D., BACON, W.G. & OSBORNE, R.C. 2004. The past and future of nickel laterites. PDAC International Convention, Trade Show & Investors Exchange, 7−10 March, 1−27.
ECONOMOU-ELIOPOULOS, M. 1996. Platinum group element distribution in chromite ores from ophiolite complexes: implications for their exploration. Ore Geology Reviews 11, 363−381.
ECONOMOU-ELIOPOULOS, M. 2003. Apatite and Mn, Zn, Co-enriched chromite in Ni-laterites of Northern Greece and their genetic significance. Journal of Geochemical Exploration 80, 41−54.
ELIOPOULOS, D.G. & ECONOMOU-ELIOPOULOS, M. 2000. Geochemical and mineralogical characteristics of Fe-Ni and bauxitic-laterite deposits of Greece. Ore Geology Reviews 16, 41−58
ENGİN, T. & AUCOTT, W. 1971. A microprobe study of chromites from Turkey. Mineral Magazine 38, 76−82.
EVANS, B.W. & FROST, B.R. 1975. Chrome-spinel in progressive metamorphism. A Preliminary Analysis. Geochimica et Cosmochimica Acta 39, 959−972.
GOLIGHTLY, J.P. 1981. Nickeliferious laterite deposits. Economic Geology, 75th Anniversary Volume, 710−735.
GROVES, D.I., BARRETT, F.M., BINNS, R.A. & MCQUEEN, K.G. 1977. Spinel phases associated with metamorphosed volcanic-type iron-nickel sulphide ores from western Australia. Economic Geology 72, 1224−1244.
HIRANO, H. & BOYALI, İ. 1980. Çaldağ Zuhurundaki Lateritik Mineralizasyonu (Manisa-Batı Anadolu) [Lateritic Mineralisation in Çaldağ Area (Manisa-Western Anatolia)]. General Directorate for Mineral Research and Exploration (MTA) report no. 1706 [unpublished].
JUTEAU, T. 1980. Ophiolites of Turkey. Ofioliti 2, 199−237.
KESKİN, M. 2003. Magma generation by slab steepening and break off beneath a subduction-accretion complex: An alternative model for collision-related volcanism in eastern Anatolia, Turkey. Geophysical Research Letters 30 (24), 8046, doi:10.1029/2003GL018019.
KHALATBARI, J.M., JUTEAU, T., BELLON, H., WHITECHURCH, H., COTTON, J. & EMAMI, H. 2004. New geological, geochronological and geochemical investigations on the Khoy ophiolites and related formations. Journal of Asian Earth Sciences 23, 507−535.
KOÇYİĞİT, A., YILMAZ, A., ADAMIA, S. & KULOSHVILI, S. 2001. Neotectonics of East Anatolia Plateau (Turkey) and Lesser Caucasus: implication for transition from thrusting to strike- slip faulting. Geodinamica Acta 14, 177−195.
KURTER, A. 1979. Türkiye’nin Morfoklimatik Bölgeleri [Morphoclimatic Regions of Turkey]. İstanbul University publications 2585, Geography Enstitue no: 106.
MICHAILIDIS, K.M. 1990. Zoned chromites with Mn-contents in the Fe-Ni-Cr-laterite ore deposits from the Edessa area in Northern Greece. Mineralium Deposita 25, 190−197.
MININGJOURNALSPECIALPUBLICATION2006. Turkey: A new exploration frontier. London. May, p. 4.
PEARCE, J.A., LIPPARD, S.J. & ROBERTS, S. 1984. Characteristics and tectonic significance of supra-subduction zone ophiolites. In: KOKELAAR, B.P. & HOWELLS, M.F. (eds), Marginal Basin Geology. Geological Society, London, Special Publications 16, 77−94.
PETERS, I. & KRAMERS, J.D. 1974. Chromite deposits in the ophiolite complex of Northern Oman. Mineralium Deposita 9, 253−259.
ŞENGÖR, A.M.C. 2002. The Turkish-Iranian High Plateau as a falcogenetic structure, Abstracts of Workshop on the Tectonics of Eastern Turkey and the Northern Anatolian Plate, Erzurum, Turkey.
ŞENGÖR, A.M.C. & YILMAZ, Y. 1981. Tethyan evolution of Turkey: a plate tectonic approach. Tectonophysics 75, 181−241.
SKARPELIS, N. 2006. Lateritization processes of ultramafic rocks in Cretaceous times: The fossil weathering crusts of mainland Greece. Journal of Geochemical Exploration 88, 325−328.
SPANGENBERG, K. 1943. Die Chromitlagerstatte von tampadel am Zobten. The Zeitschrift fur Praktische Geologie 1, 13−35.
TAKLA, M.A., NOWEIR, A.M., GHONEIM, M. & ALY, S.M. 1976. Ore mineralogy of the serpentinites of Bir El Kubbania-Um Khors area, Egypt. Chemie der Erde 35, 8-15.
TASHKO, A., LASKOU, M., ELIOPOULOS, D. & ECONOMOU-ELIOPOULOS, M. 1996. The behaviour of Pt, Pd, and Au during laterization process of the ultramafic rocks of the Shebenic-Pogradec masif, Albania: plate tectonic aspects of the Alpine metallogeny in the Carpatho-Balkan region. In: Proceedings of the Annual Meeting of IGCP Project 356, Sofia, 121−131.
TÜFEKÇİ, K. 1991. Türkiye’de Peneplen Alanlarındaki Kalıntı Depoların Ekonomik Potansiyeli [Economical Potential of Residue Deposits in Turkish Peneplain Areas]. General Directorate for Mineral Research and Exploration Magazine 112, 63−70 [in Turkish].
VALETON, I., BIERMANN, M., RECHE, R. & ROSENBERG, F. 1987. Genesis of Ni-laterites and bauxites in Greece during the Jurassic and Cretaceous and their relation to ultrabasic parent rocks. Ore Geology Review 2, 359−404.
YILDIZ, M. 1977. Manisa İli, Turgutlu İlçesi, Çaldağ Civarının Ni-Co Etüd ve Arama Raporu [Ni-Co Exploration in Manisa- Turgutlu-Çaldağ Area]. General Directorate for Mineral Research and Exploration (MTA) report no: 1707 [unpublished].