Document Type : Original Research Paper


1 Faculty of Earth Science, Shahid Behshti University, Tehran, Iran.

2 Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran.


The Mirkuh Ali Mirza area is situated at north of Sarab, NW of Iran. The study area is located in in Meshkin Shahr 1:100000 geological sheets at western Alborz–Azerbaijan structural zone. The major exposed rocks in the area are the Eocene and Neogene volcanic and subvolcanic rocks which include rhyolitic and dacitic tuff with intermediate to basic rocks. Recent geochemical stream sediment (1:25000 scale) and litogeochemical surveys showed base and precious metals in the form of veins at the periphery of a porphyry copper deposit model. Occurrence of this mineralization can be a small part of a big hydrothermal fluids circulation that its effects were developed in large scale up to 10km2 to porphyry copper mineralization. The mineralization model follow as; porphyry copper in center, gold and other base metals in periphery, anomalous concentration of Ag, As, Sb, Pb and Zn in more distal relative to central body and Mn, Ba and Hg can be found at the outer part of the system


Amidi, M., Lescuyer, J. L. & Riou, R., 1978- Geological Map of Ahar 1:250000 sheet. Geological Survey of Iran.
Berger, B. R., Ayuso, R. A., Wynn, J. C. & Seal, R. R., 2008- Preliminary Model of Porphyry Copper Deposits,U.S. Geological Survey Open-File Report 2008-1321, 55p.   
Blevin, P. L., 2005- Intrusion Related Gold Deposits.
Coop, J. A., 1973- Geochemical Prospecting for Porphyry type mineralization-a review. J.Geochem. Expor., 2, 81-102.
Emmons, W. H., 1927- Relations of metalliferous lode systems to igneous intrusives. Trans.Amer.Inst. of Mining and Metall. Eng., 74: 29-70.
Geoffroy, J. D., & Wingall, T. K., 1985- Designing Optimal Strategies for Mineral Exploration, Plenum Press, New york.
Hawkesworth, C. J., Hergt, J. M., Mcdermott, F. & Ellam, R. M., 1991- Destructivemargine magmatism and the contribution from the mantle wedge and subduct crust:       Australian Journal of Earth Science, v.38, p.577-594.
Hedenquist, J. W., Arribas, A., J. R., & Reynolds, T. J., 1998- Evolution of an intrusion-centeredhydrothermal system; Far Southeast-Lepanto porphyry and epithermal Cu-Au deposits, Philippines: Economic Geology, v. 93, p. 373-404.
Jerome, S. E., 1966- Some features pertinent in exploration of porphyry copper deposits. In: Titley, S. R., and Hicks, C. L., Eds., Geology of the Porphyry Copper Deposits, Southwestern, North America. University of Arizona Press, Tucson, AZ, pp. 75-85.
Jones, B. K., 1992- Application of metal zoning to gold exploration in porphyry copper systems: Journal of Geochemical Exploration, v. 43, p. 127-155.
Learned, R. E., 1972- Gold, a useful pathfinder element in the search for porphyry copper deposits in Puerto Rico: Proceedings of the Fourth International Geochemical Exploration Symposium, London, April 17-20.
McDonough, W. F., & Sun, S., 1995- The composition of the earth: Chemical Geology, v. 120, p.223-253.
Rollinson, H., 1993- Using Geochemical Data: Evaluation, Presentation, Interpretation, Longman Scientific & Technical, United Kingdom, 352p.
Seedorff, E., Dilles, J. H., Proffett, J. M., Einaudi, M. T., Zurcher, L., Stavast, W. J. A., Johnson, D. A., & Barton, M. D., 2005- Porphyry deposits-Characteristics and origin of hypogene features: Society of Economic Geologists, Economic Geology 100th Anniversary Volume, p. 251-298.
Sillitoe, R. H., 1973- The tops and bottoms of porphyry copper deposits: Economic Geology, v. 68, p. 799-815.
Sillitoe, R. H., 2000- Gold-rich porphyry deposits: Descriptive and genetic models and their role in exploration and discovery, in: Gold in 2000, SEG Reviews in Economic Geology v.13, p.315-345.
Sinclair, W. D., 2007- Porphyry deposits, in Goodfellow, W.D., ed., Mineral deposits of Canada: Geological Association of Canada Special Publication 5, p. 223-243.
Tatsumi, Y., Kosligo, T., & Nohda, S., 1995- Formation of a third volcanic chain in Kamchatka: generation of unusual subduction-related magmas: Contrib. Mineral. Petrol., v.120, p.117-128.