Share This Article:

Petrology, Geochemistry and Tectonomagmatic Setting of Neshveh Intrusion (NW Saveh)

Abstract Full-Text HTML Download Download as PDF (Size:4830KB) PP. 177-189
DOI: 10.4236/ojg.2014.45013    4,732 Downloads   7,181 Views   Citations

ABSTRACT

Neshveh intrusion is located in the NW of Saveh City and is a part of Orumieh-Dokhtar magmatic arc. This intrusion consists of quartz monzodiorite, granodiorite and granite that have intruded into the Eocene volcano-sedimentary rocks. This intrusion is high-K calk-alkaline and metaluminous and is classified as I-type granitoids. Field investigations along with petrographic and geochemical studies indicate that all phases of Neshveh intrusion are derived from a common magma source as a result of mineral differentiation. Different phases of this intrusion have low Mg#, Ni, Cr, Co and V which are indicative for higher evolution of magma during the magma ascent and before complete crystallization. All phases of Neshveh granitoid are characterized by LREE-rich patterns with high LREE/HREE ratio and negative Eu anomalies. Similarity of the mentioned patterns suggests a comagmatic source for these rocks and demonstrates the role of magmatic differentiation in their evolution. There are negative anomalies in the Nb and Ti along with positive anomalies of Rb, Ba, K and Pb on the spider diagrams. These anomalies are indicative for a subduction setting for magma source of these rocks. Geochemical studies indicate that the Neshveh granitoid is formed in a volcanic arc and active continental margin. In this base, it is assumed that this intrusion is formed as a result of Neo-Tethys oceanic lithosphere subduction beneath the Central Iran zone which is replaced in the Orumieh-Dokhtar magmatic arc.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Keshavarzi, R. , Esmaili, D. , Kahkhaei, M. , Mokhtari, M. and Jabari, R. (2014) Petrology, Geochemistry and Tectonomagmatic Setting of Neshveh Intrusion (NW Saveh). Open Journal of Geology, 4, 177-189. doi: 10.4236/ojg.2014.45013.

References

[1] Caillat, C., Dehlavi, P. and Martel, J.B. (1978) Geologie de la region de Saveh (Iran). Contribution a l’etude du volcanism et du plutonism tertiares de la zone de I Iran central. PhD Thesis, Grenoble, 325 Pages.
[2] Helmi, F. (1991) Petrology and geochemistry of igneous rocks in Niousht area (NE Saveh). M.Sc. Thesis, University of Tehran, Iran (in Persian).
[3] Moinvaziri, H. (1999) Introduction to the Magmatism of Iran. Tarbiat Moallem University, Tehran (in Persian).
[4] Galamgash, J. and Fonudi, M. (1998) Explanatory Text of Saveh. Geological Map 1:100,000. Geological Survey of Iran, Tehran.
[5] Irvine, T.N. and Baragar, W.R.A. (1971) A Guide to Chemical Classification of the Common Volcanic Rock. Canadian Journal of Earth Sciences, 8, 523-548. http://dx.doi.org/10.1139/e71-055
[6] Kuno, H. (1968) Differentiation of Basalt Magmas. In: Hess, H.H. and Poldervaart, A., Eds., Basalts: The Poldervaart Treatise on Rocks of Basaltic Composition, Interscience Publishers, New York, 623-688.
[7] Peccerillo, A. and Taylor, S.R. (1976) Geochemistry of Eocene Calc Alkaline Volcanic Rocks from Kastamonu Area, Northern Turkey. Contribution to Mineralogy and Petrology, 58, 63-81.
http://dx.doi.org/10.1007/BF00384745
[8] Frost, B.F., Barnes, G.G., Collins, W.J., Arculus, R.J., Ellis, D.J. and Frost, C.D. (2001) A Geological Classification for Granitic Rocks. Journal of Petrology, 42, 2033-2048.
http://dx.doi.org/10.1093/petrology/42.11.2033
[9] Shand, S.J. (1943) Eruptive Rocks. 2nd Edition, John Wiley, New York.
[10] Chappell, B.W. and White, A.J.R. (1974) Two Contrasting Granite Types. Pacific Geology, 8, 173-174.
[11] Collins, W.J., Beams, S.D., White, A.J.R. and Chappell, B.W. (1980) Nature and Origin of A-Type Granites with Particular Reference to South Eastern Australia. Contribution to Mineralogy and Petrology, 80, 189-200. http://dx.doi.org/10.1007/BF00374895
[12] Whalen, J.B., Currie, K.L. and Chappell, B.W. (1987) A-Type Granites: Geochemical Characteristics, Discrimination and Petrogenesis. Contribution to Mineralogy and Petrology, 95, 407-419.
http://dx.doi.org/10.1007/BF00402202
[13] Castro, A., Monero-Venatas, I. and De La Rosa, J.D. (1991) H-Type (Hybrid) Granitoids: A Proposed Revision of the Granite Type Classification and Nomenclature. Earth Science Reviews, 31, 237-253. http://dx.doi.org/10.1016/0012-8252(91)90020-G
[14] Pitcher, W.S. (1993) The Nature and Origin of Granite. Blackie Academic and Professional Edition. Shopman and Hall, London. http://dx.doi.org/10.1007/978-94-017-3393-9
[15] Chappell, B.W. and White, A.J.R. (2001) Two Contrasting Granite Types. 25 Years Later. Australian Journal of Earth Sciences, 48, 489-499. http://dx.doi.org/10.1046/j.1440-0952.2001.00882.x
[16] Didier, J., Duthou, J.L. and Lameyre, J. (1982) Mantle and Crustal Granites: Genetic Classification of Orogenic Granites and the Nature of Their Enclaves. Journal of Volcanology and Geothermal Research, 14, 125-132. http://dx.doi.org/10.1016/0377-0273(82)90045-2
[17] Chappell, B.W. and White, A.J.R. (1992) I- and S-Type Granites in the Lachlan Fold Belt. Transactions of the Royal Society of Edinburgh: Earth Sciences, 83, 1-26.
http://dx.doi.org/10.1017/S0263593300007720
[18] Chappell, B.W. and White, A.J.R. (1983) Granitoid Types and Their Distribution in the Lachlan Fold Belt, Southeastern Australia. Geological Society of America Memoirs, 159, 21-34.
http://dx.doi.org/10.1130/MEM159-p21
[19] Barbarin, B. (1999) A Review of the Relationships between Granitoid Types, Their Origins and Their Geodynamic Environments. Lithos, 46, 605-626. http://dx.doi.org/10.1016/S0024-4937(98)00085-1
[20] Bourdon, E., Eissen, J.P., Monzier, M., Rovin, C., Martin, H., Cotten, J. and Hall, M.L. (2002) Adakite-Like Lavas from Antisana Volcano (Ecuador): Evidence for Slab Melt Metasomatism beneath the Andean Northern Volcanic Zone. Journal of Petrology, 43, 199-217.
http://dx.doi.org/10.1093/petrology/43.2.199
[21] Cocherie, A. (1986) Systematic Use of Trace Element Distribution on Patterns in Log-Log Diagrams for Plutonic Suites. Geochimica et Cosmoshimica Acta, 50, 2517-2522. http://dx.doi.org/10.1016/0016-7037(86)90034-7
[22] Woodhead, J.D. and Johnson, R.W. (1993) Isotopic and Trace Element Profile across the New Britain Island Arc, Papua New Guines. Contributions to Mineralogy and Petrology, 113, 479-491.
http://dx.doi.org/10.1007/BF00698317
[23] Sun, S.S. and McDonough, W.F. (1989) Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes. In: Saunders, A.D. and Norry, M.J., Eds., Magmatism in the Ocean Basins, Vol. 42, Geological Society Special Publication, London, 313-345.
[24] Glenn, A.G. (2004) The Influence of Melt Structure on Trace Element Partitioning near the Peridotite Solidus. Contributions to Mineralogy and Petrology, 147, 511-527. http://dx.doi.org/10.1007/s00410-004-0575-1
[25] Wilson, M. (2007) Igneous Petrogenesis. Chapman and Hall, London.
[26] Sajona, F.G., Maury, R.C., Bellon, H., Cotton, J. and Defant, M. (1996) High Field Strength Elements Enrichment of Pliocene-Pleistocene Island Arc Basalts Zamboanga Peninsula, Western Mindanao (Philippines). Journal of Petrology, 37, 693-726. http://dx.doi.org/10.1093/petrology/37.3.693
[27] Chappell, B.W. (1999) Aluminium Saturation in I- and S-Type Granites and the Characterization of Fractionated Haplogranites. Lithos, 46, 535-551. http://dx.doi.org/10.1016/S0024-4937(98)00086-3
[28] Kamber, B.S., Ewart, A., Collerson, K.D., Bruce, M.C. and McDonald, G.D. (2002) Fluid-Mobile Trace Element Constraints on the Role of Slab Melting and Implications for Archean Crustal Growth Models. Contributions to Mineralogy and Petrology, 144, 38-56. http://dx.doi.org/10.1007/s00410-002-0374-5
[29] Atherton, M.P. and Ghani, A.A. (2002) Slab Breakoff: A Model for Caledonian, Late Granite Syncollisional Magmatism in the Orthotectonic (Metamorphic) Zone of Scotland and Donegal, Ireland. Lithos, 62, 65-85. http://dx.doi.org/10.1016/S0024-4937(02)00111-1
[30] Batchelor, R.A. and Bowden, P. (1985) Petrogenetic Interpretation of Granitoid Rock Series Using Multicationic Parameters. Chemical Geology, 48, 43-55. http://dx.doi.org/10.1016/0009-2541(85) 90034-8
[31] Harris, N.B.W., Pearce, J.A. and Tindle, A.G. (1986) Geochemical Characteristics of Collision Zone Magmatism. Collision Tectonic, Geological Society of American Bulletin, Special Publication, 19, 67-81. http://dx.doi.org/10.1144/GSL.SP.1986.019.01.04
[32] Pearce, J.A. (1996) Sources and Settings of Granitic Rocks. Episodes, 19, 120-125.
[33] Gorton, M.P. and Schandl, E.S. (2002) From Continents to Island Arc: A Geochemical Index of Tectonic Setting for Arc-Related and within Plate Felsic to Intermediate Volcanic Rocks. Canadian Mineralogist, 38, 1065-1073. http://dx.doi.org/10.2113/gscanmin.38.5.1065
[34] Bowden, P., Batchelor, R.A., Chappelle, B.W., Didier, J. and Lameyer, J. (1984) Petrological, Geochemical and Source Criteria for the Classification of Granitic Rocks: A Discussion. Physics of the Earth and Planetary Interiors, 35, 1-11. http://dx.doi.org/10.1016/0031-9201(84)90029-3
[35] Pearce, J.A., Harris, N.B.W. and Tindle, A.G. (1984) Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks. Journal of Petrology, 25, 956-983.
http://dx.doi.org/10.1093/petrology/25.4.956

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.