Document Type : Original Research Paper


1 Faculty,of Basis Sciences, Tarbiat Modarres University, Tehran, Iran

2 Geological Survey of Iran, Theran, Iran

3 Department of Geosciences, Naruto University of Education


     Kal-e Kafi granitoid complex is a part of Central Iranian structural zone called Yazd block. This complex is composed of a wide spectrum of plutonic rocks ranging from gabbro to alkalike granite with age range of Upper Eocene-Lower Oligocene. Potassic granitoid shows geochemical and mineralogical characteristics distinct from other plutonic rocks in the complex. The potassic granitoids are peralkaline and ferroan while other plutonic rocks in the complex are alkaline to calc-alkaline and magnesian. With respect to REE abundances and patterns, the potassic rocks of the complex are different from other Kal-e Kafi granitoids. Low REE abundances of the potassic granitoids indicate that the rocks could not be related to other plutonic bodies through magmatic differentiation. This would probably demonstrate that different petrogenetic processes were involved in petrogenesis of the potassic granitoids. The potassic granitoids are likely to be the consequence of crustal partial melting.


Adib, D., 1972- Mineralogische untersuchungen in der oxydations-zone der lagerstatte Tschah–Khuni , Anarak ,Zentral Iran,Inaugural- Dissertation , Heidelberg – Tehran , 194P.
Aistov, L., Melnikov, B., Krivyakin, B., Morozov, L., 1984 -Geology of the Khur area (central Iran), Explanatory text of the Khur quadrangle map 1:250,000
Alavi, M., 1991-  Sedimentary and structural characteristics of the paleo – Tethys remnants in northeastern  Iran,Geol . Soc. of Amer. Bull., 103: 983 –9
Bullen, T. D. & Clynne, M. A., 1990 -Trace element and isotopic constraints on magmatic evolution at Lassen center,J.of Geophysical Research 95:19671- 19691   
Cerny, P., Chapman, R., Masau, M., 2000- Two-Stage exsolution of a Titanian phase in Niobian Rutile (Sc,Fe3+) (Nb,Ta) O4  From Southern Norway, Can.Mineral.,38:907-913
Eggins , J. & Hensen, B. J., 1987- Evolution of mantle – derived Augite–Hypersthene granitoid by Crystal–Liquid differentiation: Eastern Australia, Lithos, 20:295-310
Foster, M. D.,1960- Interpretation of the composition of trioctahedral micas , U.S. Geol.Surv.Prof .Pap.,354B:11-49
Frost , B. R., Barnes, C. G., Collins, W. J., Arculus , R.J., Ellis, D. J. & Frost , C. D., 2001- A geochemical classification for granitic rocks,J.of  Petrology ,42 ,11:2033-2048
Hoskin, P. W. O., Kinny, P. D., Wyborn, D. & chapple, B.W., 2000- Identifying accessory mineral saturation during differentiation in granitoid magma:An integrated approach, J. of petrology , 41, 1365-1395
Leake, B .E., Wolley, A. R., Arps,C. E. S., Birch, W. D.,Gilbert, M. C., Grice, J. D., Hawthorne, F. C., Kato, A., Kisch , H. J., Krivovichev , V. G., Linthout, K., Laird ,J. ,Mandarino, J., Maresch, W. V.,  Nickel, E. H., Rock, N. M. S., Schumacher, J.C., Smith D. C., Stephenson, N. C. N., Ungaretti, L., whittaker, E. J. W .& Youzhi, G., 1997- Nomenclature of Amphiboles , Report of the subcommittee on Amphiboles of the international Mineralogical Association commission on new minerals and mineral names , Eur. J.Mineral , 9:623-651
Liegeois, J. P., Navez, J., Hertogen, J., Black, R., 1998- Contrasting Origin of post – collisional high –K calc-alkaline and Shoshonitic versus alkaline and peralkaline granitoids . The use of sliding normalization, Lithos, 45:1-28
Nakamura, N., 1974 - Determination of REE, Ba, Mg, Na and K in carbonaceous and ordinary chondrites. Geochimica et Cosmichimica Acta 38: 757-775.
Pitcher, W. S., 1997- The nature and origin of granite, 2ndedition, chapman and Hall, 387P.
Reyre, D. & Mohafez, S., 1972- A first contribution of the NIOC-ERAP agreements to the knowledge of Iranian geology,edition Technips Paris ,58P.
Stocklin, J., 1968- Structural history and tectonics of Iran; A review,AAPG ,52,7:1229-1258
Thuy,N. T. B., Satir, M., Siebel, W., Vennemann, T. 8 Long, T. V., 2004- Geochemical and isotopic constraints on the petrogenesis of granitoids from the Dalat zone , Sothern Vietnam, J.of Asian Earth Sciences,23:467-482.
Wones, D. R., 1989- Significance of the assemblage titanite + magnetitet    + quartz in granitic rocks, Am. Mineral. 74:744-749
Wu, F., Jahn, B., Wilde, S. A., Lo, C., Yui, T., Lin, Q., Ge, W. & Sun, D., 2003- Highly FractionatedI-type granites in NE china (1): geochronology and petrogenesis , Lithos , 66:241 – 273
Yakovenko,V., Chinakov , I., Kokorin ,Yu. & Krivyakin , B.,  1981- Report on detailed geological prospecting in Anarak Area ( Kal-e Kafi-Khoni Locality). V/O << Technoexport >>, Rep. No.13, Moscow, 293 P.