Delineation of the Cr mineralization based on the stream sediment data utilizing fractal modeling and factor analysis in the Khoy 1:100,000 sheet, NW Iran

Somayeh Momeni, Seyed Vahid Shahrokhi, Peyman Afzal, Behnam Sadeghi, Taher Farhadinejad, Mohammad Reza Nikzad
1.139 177

Öz


Fractal methods are regarded as a highly efficient method for more accurate separation of boundaries between mineralized zone in shallow and deep studies. In this research, concentration-number (C-N) and concentration-area (C-A) fractal methods were used in order to identify promising areas of the elements like Cr, Co and Ni in the Khoy 1:100,000 geological mapping sheet, NW Iran. The factor analysis was performed on the elements, and factors, which were related to the elements, were isolated and studied by both fractal methods. The current geological locations of the extreme anomalies were investigated and the results showed a very close relationship and overlapping. The results of the presented models show that the most elements under study are located in the central and southwestern parts of the sheet. From the point of view of the lithology, these areas correspond to the serpentinite ultramafic units of harzburgite and dunite, and as a result, there is a high probability of Cr mineralization. The achieved results are confirmed by factor analysis. This means that a factor accumulation of these elements is exactly the same as those of each element.


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DOI: http://dx.doi.org/10.19111/bmre.89526

Referanslar


Afzal, P., Zia Zarifi, A., Sadeghi, B., 2013, Separation of Geochemical Anomalies Using Factor Analysis and Concentration-Number (C-N) Fractal Modeling Based on Stream Sediments Data in Esfordi 1:100000 Sheet, Central Iran , Iranian Journal of Earth Sciences, Vol. 5, p.p. 100-110.

Afzal P., Fadakar Alghalandis Y., Khakzad A., Moarefvand P., Rashidnejad, N., 2011. Delineation of mineralization zones in porphyry Cu deposits by fractal concentration–volume modeling. J Geochem Explor 108: 220–232

Afzal P, Khakzad A, Moarefvand P, Rashidnejad Omran N, Esfandiari B, Fadakar Alghalandis Y, 2010, Geochemical anomaly separation by multifractal modeling in Kahang (GorGor) porphyry system, Central Iran. J Geochem Explor 104:34–46

Agterberg, FP., 1995. Multifractal modeling of the sizes and grades of giant and supergiant deposits. Int Geol Rev 37:1–8Azizi, H., Moinevaziri, H., Mohajjel, M., Yagobpoor, A., 2006. PTt path in metamorphic rocks of the Khoy region (northwest Iran) and their tectonic significance for Cretaceous–Tertiary continental collision. J. Asian Earth Sci. 27, 1–9.

Azizi, H., Moinevaziri, H., Mohajjel, M., Yagobpoor, A., 2006. PTt path in metamorphic rocks of the Khoy region (northwest Iran) and their tectonic significance for Cretaceous–Tertiary continental collision. J. Asian Earth Sci. 27, 1–9.

Cheng Q, Agterberg FP, Ballantyn SB., 1994. The separartion of geochemical anomalies from background by fractal methods. J Geochem Explor 51:109–130

Deng J,Wang Q, Yang L,WangY, Gong Q, Liu H., 2010. Delineationand explanation of geochemical anomalies using fractal models in the Heqing area, Yunnan Province, China. J Geochem Explor 105:95– 105

Ghoraishi, M., Arshadi, S., 1987. Geology Map of Khoy Quadrangle (1:250,000). Geology Survey of Iran

Hassanpour, Sh., Afzal, P., 2013. Application of concentration-number (C-N) multifractal modelling for geochemical anomaly separation in Haftcheshmeh porphyry system, NW Iran. Arabian Journal of Geosciences vol. 6, pp. 957–970

Li, Changjiang & Ma, Tuhua & Shi, Junfa, 2003- Application of a fractal method relating concentrations and distances for separation of geochemical anomalies from background, Journal of Geochemical Exploration, 77: 167–175.

Mandelbrot BB., 1983. The fractal geometry of nature. Freeman, SanFrancisco, pp 1–468

Meng, X. and Zhao, P., 1991. Fractal method for statistical analysis of geological data, Chinese Journal of Geosciences, vol. 2, pp. 207-211

Mohammadi, A., Khakzad, A., Rashidnejad Omran, N., Mahvi, M.R., Moarefvand P, Afzal P (2013) Application of number–size (N–S) fractal model for separation of mineralized zones in Dareh-Ashki gold deposit, Muteh Complex, Central Iran. Arab J Geosci. 6: 4387-4398.

Monecke T, Monecke J, Herzig PM, Gemmell JB, Monch W., 2005. Truncated fractal frequency distribution of element abundancedata: a dynamic model for the metasomatic enrichment of base and precious metals. Earth Planet Sci Lett 232:363–378

Radfar, J., Amini, B., 1999. Geology Map of the Khoy Quadrangle (1:100,000). Geological Survey of Iran.

Rafiee, A., 2005. Separating geochemical anomalies in stream sedimentmedia by applying combination of fractal concentration area model andmultivariate analysis (Case study: Jeal-e-Barez 1:100,000 Sheet,Iran), 20th World Mining Congress Proceeding, Iran 461–470

Reimann C., Filzmoser P. & Garrett R.G., 2005. Background and threshold: critical comparison of methods of determination. Sci. Total Environ. 346, 1—16

Turcotte DL., 1986. A fractal approach to the relationship between ore grade and tonnage. Econ Geol 18:1525–1532

Sadeghi B, Moarefvand P, Afzal P, Yasrebi AB, Daneshvar Saein L., 2012a. Application of fractal models to outline mineralized zones in the Zaghia iron ore deposit, Central Iran. J Geochem Explor, Special Issue “fractal/multifractal modelling of geochemical data”, 122:9–19

Sadeghi B, Afzal P, Moarefvand P, KhodaShenas N., 2012b. Application of concentration–area fractal method for determination of Fe geochemical anomalies and the background in Zaghia area, Central Iran. 34th International Geological Congress (IGC), Brisbane, Australia

Shamseddin Meigoony, M., Afzal, P., Gholinejad, M., Yasrebi, A.B., Sadeghi, B., 2014, Delineation of geochemical anomalies using factor analysis and multifractal modeling based on stream sediments data in Sarajeh 1:100000 sheet, Central Iran, Arabian Journal of Geosciences 7, 5333–5343.

Stocklin, J., 1968. Structural history and tectonics of Iran: a review. AAPG Bulletin 52, 1229-1258.

Stocklin, J., Nabavi, M., 1972. Tectonic Map of Iran. Geological Survey of Iran.

Thompson, M., Howarth, R.J., 1976. Duplicate analysis in geochemical practice (2 parts). Analyst 101, 690-709.

Thompson, M., Howarth, R.J., 1978. Anew approach to the estimation of analytical precision. Journal of Geochemical Exploration 9, 23-30.