Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Geochemistry, genesis, and gold potential in Kuh-e-zar prospecting area, Torbate Heydariyeh

Document Type : Original Research Paper

Authors
Mohammad Hassan Karimpour 1
Alireza Mazloomi 2
1 Department of Geology, Faculty of Science, Ferdowsi University, Mashhad, Iran
2 Department of Geology, Payam Nour University, Mashhad, Iran
Abstract
Kuh-e-zar gold prospecting area is situated about 41 km. west of Torbate-Heydariyeh and 5km south of Fadiheh village.
Rhyolitic and andesitic pyroclastic and lava flows (Eocene) are widespread all over in the area. Granite, quartzmonzonite and granodiorite bodies are exposed in the northern part of the area.
Mineralization is being controlled by the faults and faults intersections. Faults are trending N70° E to NS and the second series N40° W. They are very steep (70°-90°) and the width of mineralized faults varies between 0.5 to 40 m. Twelve mineralized faults are recognized.
Two types of mineralization are present:
1) Quartz, hematite (specularite), and gold. More than %90 of the area is of this type.
2) Quartz, chalcopyrite, hematite, and gold. This type is present near or within the intrusive rocks.
Chloritization and silicification are abundant, but, minor potassic and argillic alteration are present, as well. The average gold grade is between 3-6 ppm and ore reserve is estimated more than 5 million tons. Magmatic solution, rich in gold and some copper, but highly oxidizing and low in sulfur, are present. These are originated from the intrusive rocks, partly being exposed in the northern part that deposited gold and copper within the faults. This is due to drop of temperature and increasing oxygen fugacity.
Keywords
Geochemistry, Gold, Kuh-e-zar, Torbate Heydariyeh

Subjects

Berger, B.R., 1985- Geologic-geochemical features of hot-spring precious- metal deposits: United States Geological Survey, Bulletin 1646, p.47-53. 
Berger, B.R., and Henley, R.W., 1989- Advances in the understanding of epithermal goldsilver deposits, with special reference to the Western United States: Econ. Geol. Monograph 6, p.405-423.
Berger, B.R., and Bagby, W.C., 1991, The geology and origin of Carlin-type gold deposits. In: Gold metallogeny and Exploration (R.P.Foster, ed.). Blackie, London & Glasgow, UK, p.210-248.
Bonham, H.F., Jr., 1988- Models for volcanic- hosted precious metal deposits: A review, in: Schafer, R.W., Cooper, J,J., and Vikre, P.G., eds., Bulk mineable Precious Metal Deposits of the Western United States: Geol. Soc. of Nevada, p.259-271.
Buchanan, L.j., 1981- Precious metal deposits associated with volcanic environments in the Southwest, in Dikinson, W.R., and Payne, W.D., eds., Relations of tectonics to ore deposits in the Southern Cordillera: Arizona Geological Society Digest, V.14, p.237-262.
Christie, A.B., and Brathwaite, 1986-Epithermal gold-Silver and porphry copper deposits of the Hauraki goldfield- A Review, Monograph Series on mineral deposits 20, p. 129-143.
Huston, D.L., Bolger, C., and Cozens, G., 1993-A comparison of mineral deposits at the Gecko and White Devil deposits: Implications for ore genesis in the Tennant Creek district, Northen Territory, Australia, p. 1198-1226.
Karimpour, M.H.-1983, Exploration guide lines for disseminated gold deposits: Geol. Survey of Iran open file 622-342, 38p.
Karimpour, M.H., and Mazloomi, A.R., 1999- Gold prospecting at Khheh- Zar, Zarmeher Company report.
Large, R.R., Huston, D.L., Mcgoldrick, P.J, and Buxton, P.A., 1995-Gold distribution and genesis in Australian volcanic massive sulfide deposits and their significance for gold transport models: Econ Geol.p.520-535.
Safonov, Yu, G., 1997-Hydrothermal gold deposits: Distribution, and productivity of ore-forming systems: Geology of ore Deposits, Vol.39, No.1, p.20-32. Geological-genetic types,
Sillitoe, R.H., 1988- Gold and silver deposit in porphyry systems. In: Bulk Mineable Precious Metal Deposits of the Western States (R.W.Schsfer, J.J. Cooper & P.G. Vikre, eds.) Geol. Soc. Nevada, p.233-257.
Sillitoe, R.H., 1990- Gold-rich porphyry copper deposits of the Circum- Pacific region- an updated overview. In: proceedings Pacific Rim Congress 90 (Gold Coast, Queensland). Australia. Inst. Mining & Metall. 2, p. 119-126.
Sillitoe, R.H., 1995-Epithermal models: Genetic types, geometrical controls and shallow features. In Mineral Deposit Modelling (R. V. Kirkham, W.D. Sinclar, R.I. Thorpe & J.M. Duke, eds.). Geol. Assoc. Can. Special Paper 40, p.403-417
Sillitoe, R.H., 1992- Geotectonics setting of western Pacific gold deposits, in: Bartholomew, M.J., Hydman, D.W., Mogk, D.W., and Mason, R. (eds.), Characteization and Comparison of Ancient and Mesozoic continental margins, 8th international Conference on Basment Tectonics, Butte, MT, 1988, Proceedings: Kluwar Academic Publishers, Dordrecht, The Nederlands, p. 665-678.
White, N.C., and Hedenquist, J.W., 1995-Epithermal Gold deposits: Style, characteristics and exploration: SEG No.23. p.10-13.
Scientific Quarterly Journal of Geosciences
Volume 7, 27-28
Spring & Summer 1999, vol. 7, No. 27-28
Summer 1999
Pages 2-13