Petrology, Minerals chemistry and Geochemical relationships of the Sheared Gabbro Rocks in Alanah (Beesha) area within Erbil Governorate, NE Iraq
DOI:
https://doi.org/10.24237/ASJ.01.04.582CAbstract
The current research is seeking to identify the petrography, mineralogy and geochemical relationships of Gabbro rocks in Besha area within Erbil Governorate, at the Unstable Shelf in Imbricate Zone. This study aims to determine the origin of the gabbroic rocks and their geochemical relationships.
The basic sheared gabbro rocks are exceptional in the studied area at Alanah (Beesha) in samples (B1, B2, B3, B6, and B8). The sheared gabbroic rocks contain fine to very fine crystals of plagioclase which is presenting as euhedral to subhedral tabular crystals and anhedral grains that cumulate and fractured by shearing stress that can be concentrically zoned as well as processing polysynthetic twins.
The gabbroic rocks in the area of study are characterized by moderate to high ranges of the loss on ignition. These variation values are a crude measuring of the rock alteration degree. Accordingly, all gabbro rocks types have been affected by the variable alteration degree. These gabbroic rocks exhibiting the tholeiitic geochemical features, with characterized by good trend of sub-alkaline tholeiitic in the total alkalis-silica and AFM relationships with the medium-K tholeiitic.
Generally, the most distinctive properties exhibiting by using spider diagrams of the gabbro rocks in the studied area are selected enrichment of the certain elements such as Sr, Ba and U, addition to relatively lack of enrichment of Zr, Y and Hf. These geochemical patterns and the variation of the HFSEs are exhibiting by the tholeiite rocks are characterization of the supra subduction Zone. In Addition to all analyzing opaque minerals in the sheared gabbro rocks of the area of study are representing alumina magnetite and secondary magnetite.
References
T. Buday, The regional geology of Iraq, Stratigraphy and palenogeography, edited by I. M. Kassab, S. Z. Jassim, (Dar Al- Kutib pulblishing house, Mosel, Iraq, 1980), 445
GEOSURV. Baghdad, The geology of the Rania area, Manuscript report No.271, C. M. G.Bolton, (1958)
M. P.Searle, S. J. Lippard, J. D. Smewing, D. C. Rex, J GEOL SOC LONDON (1980)
H. A. Babaie, M. A. Gazi, Journal of Asian Earth Sciences, 19(1),61-76(2001)
Omrani J., Whitechurch H., Benoit M., Prouteau G. and Jolivet L., 2008. Arc-Magmatism and Subduction History beneath the Zagros Mountains, Iran: A New Report of Adakites and Geodynamic Consequences Lithos 106(3-4),380-398
K. J. Aswad, N. R. Hamah Aziz, H. A. Koyi, Geological Magazine, THEMATIC ISSUE: Geodynamic evolution of the Zagros 148(5-6), 819 – 837(2001)
T. Buday, S. Z. Jassim, The regional Geology of Iraq, 2, Tectonism, Magmatism and Metamorphism, edt. By I. M. Kassab, M. J. Abass, (Geological Survey and Mineral Investigation, Baghdad Iraq, 1987), 352
S. Z. Jassim, C. Goff, Geology of Iraq, (Dolin Prague and Moravian Museum Brno, 2006), 341
S. Z. Jassim, M. I. Al-Hassan, Geol. Soc. Iraq Journ., 169-210(1977)
M. Shawan, R. O. Leatherdale Maxeiner, K. M. Ansdell, northern Jour. Saskatchewan, Saskatchewan Geological Survey, 2, 1-17(2003)
B. E. Leak, A. R. Woolley, C. E. S. Arps, W. D. Birch, M. C. Gilbert, J. D. Grice, F. C. Hawthorne, A. Kato, H. J. Kisch, V. G. Krivovichev, K. Linthout, J. Laird, J. A. Mandarino, W. V. Maresch, E. H. Nickel, N. M. S. Rock, J. C. Schumacher, D. C. Smith, N. C. N. Stephenson, L. Ungaretti, E. J. W. Whittaker, G. Youzhi, Amer. Mineral., 82, 1019-1037(1997)
M. K. Yaliniz, M. C. Goncuoglu, Jour. Of Turk J. Earth Sci., 8,103-111(1999)
J. A. Pearce, S. J. Lippard, S. Robert, Characteristics and tectonic significance of Supra-subduction zone ophiolite, marginal basin geology, Vol.16, (Geol. Soc. Spec. Public. London, 1984), 77-94
C. Klein, Jr. C. S. Harlbut, Manual of Mineralogy, (John Wiley and Sons, New York, 1993), 681
R. E. Stevens, Composition of some chromites of the western hemisphere, Am. Mineral., Vol 29,1-34(1944)
O. Parlak, H. Yilmaz, D. Boztug, Jour. Of Earth Science (Turkish J. Earth Sci.), 15, 25-45)2006(
G. Duclaux, R. P. Menot, S. Guillot, Y. Agbossoumonde, N. ana Hilairet, Jou. Of Precambrian Research, 2720, 1-18)2006(
L. S. Jenson, Geological Report 66, 1-20)1976(
J. F. Davis, R.W. E. Grant, R. E. S. Whitehead, J. Earth. Sci., 16, 305-311)1979(
M. Shamim Khan, T. E. Smith, M. Raza, J. Huang, Jour. Of Gondwana Research, 8(4), 553-566(2005)
M. M. Sofy, Petrochemistry and petrogenesis of Bulfat mafic layered igneous intrusion around Herro (Qaladizeh)-Iraq Kurdistan, Msc. thesis, Salahaddin University-Erbil, 123(2003)
B. Yibas, W. U. Reimold, C. R. Anhaeusser, C. Koeberl, Jour. Precambrian Research, 121, 157-183(2003)
J. R. Cann, Earth Planet, Sci. Lett., 10, 7-11(1970)
O. Parlak, H. Yilmaz, D. Boztug, ,. Origin and tectonic significance of the metamorphic Sole and isolated dykes of divirgi ophiolite (Sivas, Turkey): Evadence for break-off prior to ophiolite emplacement, Jour. Of Earth Science (Turkish J. Earth Sci.), 15, 25-45(2006)
H. Rollinson, Using geochemical data evolution, presentation, and interpretation, (Wiley, New York,1993), 351
M. Wilson, Igneous Petrogenesis, A Global Tectonic Approch, (Unwin Hyman, London, 1989),400
T. N. Irvine, W. R. A. Baragar, Muskox Intrusion and Coppermine River Lavas, Northwestern Territories, Canda: 24th Internat. Geol. Congr., Montreal, Excutsion A29, Gudebook, 1972), 70
R. W. Le Maitre, P. Bateman, A. Dudek, J. Keller, J. Lameyre, M. J. LeBas, P. A. Sabine, R. Schmid, H. Sorenson, A. Streckeisen, A. R. Woolley, B. Zenettin, A. Classification of Igneous rocks and Glossary of Terms, Recommendations of the International Union of Geological Sciences, Subcommission on the Systematics of Igneous Rocks, Blackwell, Oxford, 1989), 193
H. S. T. C. O’Neill, H. Palme, Composition of the silicate Earth: implications for accretion and core formation. In The Earth’s Mantle: Structure, Composition, and Evolution- the Ringwood, volume (ed l, Jackson), (Cambridge University Press Cambridge,1998), 3-126
S. M. McLennan, Review of Mineralogy, 21, 169-200(1989)
H. Rollinson, Using geochemical data evolution, presentation, and interpretation; Wiley, New York, 1993), 351
M. Shamim Khan, T. E. Smith, M. Raza, J. Huang, Jour. Of Gondwana Research, 8 (4),553-566(2005)
S. R. Taylor, S. M. McLennan, The Continental Crust: Its Composition and Evolution, (Blackwell, London, 1985), 312
G. Duclaux, R. P. Menot, S. Guillot, Y. Agbossoumonde, N. ana Hilairet, Jou. Of Precambrian Research, 2720, 1-18(2006)
R. E. Harmer, V. Gruenewaldt, Jour. Geol. S. Afrrica, 93,104-122(1991)
M. C. Johnson, T. Plank, Dehydration and melting experiments constrain the fate of subducted sediments, Geochemistry, Geophysics, and Geosystems, 1, (1999)
K. Resimic-Saric, A. Koroneos, V. Cvetkovic, K. Balgh, Jou. of Builetin of Geological Society of Greece, XXXVI, 597-606(2004)
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