Separation of geochemical anomalies by concentration-area and concentration-number methods in the Saqez 1:100,000 sheet, Kurdistan

Subject Areas : Mineralogy

Fatemeh Zadmehr ¹ , Seyed Vahid Shahrokhi ²

1 - Department of Geology, Factually of Science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran
2 - Department of Geology, Factually of science, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

Received: 2017-05-06 Accepted : 2017-10-31 Published : 2019-07-01

Keywords: Concentration-Area (C-A), Saqez, Concentration-Number(C-N), multifractal modeling, Stream sediments,

Abstract :

Regional exploration and identification of anomalies can be done by geochemical data resulted from stream sediments. In this paper, fractal methods of concentration-number and concentration-area were used for regional studies, and abnormalities of elements including gold, arsenic, bismuth and mercury were studied. Statistical processing of these elements took place with the help of 1063 samples of stream sediments in the Saqez 1:100,000 sheet (Kurdistan Province). The elements were analyzed in the laboratory of the Geological Survey and Mineral Exploration of Iran by ICP-OES method and Au element was analyzed by Emission Spectrograph method. According to the position of geology, existing structures and the dominant rock type, the comparison between the map prepared methods of concentration-number and concentration-area was conducted in Saqez sheet. In general, the results of the two methods showed that in the south, southwest, center and west of the region, the concentration of these elements is increased, and presence of ore promising areas is high in these areas. Concentration-number method showed a good overlap with concentration-area method; making extensive geochemical halos and encompassing known ores of Qolqoleh, Kervian and Qabghlojeh, it follows the expected process of mineralization in Sanandaj-Sirjan zone.

References:

1. Afzal P, Dadashzadeh-Ahari H, Rashidnejad-Omran N, Aliyari F (2013) Delineation of gold mineralized zones using concentration-volume fractal model in Qolqoleh gold deposit, NW Iran. Ore Geology Reviews 55:125-133.


2. Aliyari F, Rastad E, Mohajjel M, Arehart GB (2009) Geology and geochemistry of D-O-C isotope systematics of the Golgoleh gold deposit, northwestern Iran: implications for ore genesis. Ore Geology Reviews 36:306–314.


3. Babakhani A, Hariri A, Farjandi F (2003) Geological map and explain of Sagez 1/100000 sheet, Geological Survey and Mineral Exploration of Iran.


4. Cheng Q, Agterberg FP, Ballantyne SB (1994) The separation of geochemical anomalies from background by fractal methods. Journal of Geochemical Exploration 51:109–130.


5. Daneshvar Saeen L, Rasa A, Afzal P (2011) The relationship between the distribution process of elements of tin, tungsten, mercury and gold and the process of faults using kriging method in sheet 1: 50,000 in Deh Biraban (southeastern Iran), Journal of Basic Science, Islamic Azad University, Science and Research Branch 81:153-168.


6. Heidari M, Ghaderi M, Afzal P (2013) Delineating mineralized phases based on lithogeochemical data using multifractal model in Touzlar epithermal Au-Ag (Cu) deposit, NW Iran. Applied Geochemistry 31:119-132.


7. Eftekhar-Nejad J (1980) Tectonic Classification of Iran in Relation to Depositional Basins. Journal of Iranian Petroleum Society, 82: 19-28.


8. Heidari M, Ghaderi M, Afzal P (2013) Delineating mineralized phases based on lithogeochemical data using multifractal model in Touzlar epithermal Au-Ag (Cu) deposit, NW Iran. Applied Geochemistry 31:119-132.


9. Hosseini SA, Afzal P, Sadeghi B, Shahrokhi SV, Farhadinejad T (2015) Prospection of Au mineralization based on stream sediments and lithogeochemical data using multifractal modeling in Alut 1:100,000 sheet, NW Iran, Arabian Journal of Geosciences 8:3867–3879.


10. Kheiri F (1998) Report of remote sencing study in Sagez 1/100000 sheet. Geological Survey and Mineral Exploration of Iran.


11. Meigoony MS, Afzal P, Gholinejad M, Yasrebi AB, Sadeghi B (2014) Delineation of geochemical anomalies using factor analysis and multifractal modeling based on stream sediments data in Sarajeh 1:100,000 sheet, Central Iran. Arabian Journal of Geosciences 7(12):5333-5343.


12. Mandelbrot BB (1983) The fractal geometry of nature. Freeman, San Fransisco .


13. Mao Z, Peng S, Lai J, Shao Y, Yang B (2004) Fractal study of geochemical prospecting data in south area of Fenghuanshan copper deposit, Tongling Anhui. journal of earth science and environment 26(4):11–14.


14. Makovicky E, Topa D, Tajeddin H, Putz H, Zagler G (2013) Ferdowsiite: a new mineral from the Barika ore deposit, Iran. Can Mineral 51(5): 727–734.


15. Monecke T, Monecke J, Herzig PM, Gemmell JB, Monch W (2005). Truncated fractal frequency distribution of element abundance data: a dynamic model for the metasomatic enrichment of base and precious metals. Earth and Planetary Science Letters 232:363–378.


16. Shahrokhi SV (2008) Study of genetic & mineralization of Gholgholeh & Kervian gold deposite in Sagez area, Ph.D. Thesis, Tehran Science and research branch, Islamic Azad University.


17. Shahrokhi SV, Khakzad A, Rasa I (2009) Gold Mineralization in GholGholeh area-Southwest of Saqhez, Iran, Journal Of Basic Science, Islamic Azad University 73:45-62.


18. Shahrokhi SV, Zarei Sahamieh R (2013) Petrogenesis of Mirdeh Area Granitoid(West of Sagez city), Journal of the Earth 29:177-194.


19. Stocklin j (1968) Structual history and tectonic of Iran, a review, American association of Petrolium Geologist Bulletine, 52(7):1229-1258.


20. Turcotte DL (1986) A fractal approach to the relationship between ore grade and  tonnage. Economic Geolology 18:1525–1532.


21. Yarmohammadi A, Rastad E, Mohajjel M, Shamsa MJ (2008) Barika gold mineralization, a gold-rich volcanogenic massive sulfide deposit in Iran. Journal of Science University of Tehran, 34(1):47–61.


22. Zuo R, Cheng Q, Xia Q (2009) Application of fractal models to characterization of vertical distribution of geochemical element concentration. Journal of Geochemical Exploration 102:37–43.


23. Zuo R (2011)  Decomposing  of  mixed  pattern  of  arsenic  using  fractal  model  in Gangdese  belt,  Tibet,  China,  Applied Geochemistry 26:271.