Ore control factors of Zinc and Lead mineralization in the Tangedozdan area (NE Fereydounshahr-Isfahan Province)

زمین شناسی اقتصادی

Volume 15, Issue 1 - Serial Number 36, May 2023, Pages 27-51   

Document Type: Research Article

DOI: 10.22067/econg.2023.79745.1058

Authors

Behrooz Amiri¹; Seyed Vahid Shahrokhi^{* 2}

¹M.Sc. student, Department of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

²Associate Professor, Department of Geology, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran

Abstract

The Tangedozdan area is located in the west of Isfahan province and 25 km northeast of Fereydounshahr. Structurally, this area is located in the Sanandaj- Sirjan zone. The rock units include greenish volcanic rocks, lime-sandstone, limestone to dolomitic-limestone, conglomerate, sandy-limestones and present-age alluviums. The existing rock sequence along with zinc and lead mineralization has been affected by tectonic phenomena, in the form of thrusting and the formation of open folds, joints and fractures. The main geological structures include thrust plates that have pushed scales of Jurassic and Cretaceous rock units from the northeast to the southwest on top of each other. The folding structures are very small and dense size and are mainly related to faults that have affected the rock units, especially thin-bedded limestone. Tectonic studies show the influence of two lateral faults with the NW-SE trend and a concentrated fault zone inside the dolomitic rocks in the mineralization process. Zinc and lead mineralization shows more expansion in the tension zones. Mineralogy, geochemistry and, EPMA studies indicate the presence of calamine and a small amount of zincian dolomite. The limestone to dolomitic-limestone rocks hosts zinc and lead mineralization and consists of lenses, non-sulfide minerals veins and, veinlets such as smithsonite, hemimorphite, cerussite and, barite, sulfide minerals such as sphalerite and galena. The dolomitization phenomenon due to the effects of acidic hydrothermal fluids has caused alteration of the carbonate wall rock. The structural factor is the main reason for the formation of this dolomite type and the replacement of magnesium with zinc.
 
Introduction
High tectonic energy causes shear structures by deforming the crust (Ramsay and Huber, 1987; Lawrence, 2010; Peacock, 1992; Montest and Hirth, 2003). Different temporal and spatial distribution of mineral resources is the result of crustal orogenic actions during tectonomagmatic terms related to specific crust zones. (Aghanabati, 2006; Nabatian et al., 2015). Carbonate rocks under appropriate geodynamic conditions with specific platforms are potential hosts of lead and zinc resources (Rajabi et al., 2012a; Rajabi et al., 2012b; Amiri, 2017; Karimpour et al., 2019). Accordingly, in this we attempt to investigate the relationship between the structure and mineralization and provide a model for structural formation. The Tangedozdan zinc and lead mine 25km northeast of Fereydounshahr is located in the extreme western corner of Isfahan Province and adjacent to the Lorestan Province. For the geological location, this area is considered part of the Sanandaj-Sirjan zone. The limestone unit in the east of Tangedozdan hosts zinc carbonate mineralization. In this region, the mineralization is located between two faults inside the dolomite limestone concentrated directly on the trachyandesite volcanic rocks.
 
Materials and methods
To accurately identify the minerals, thin-polished sections were prepared from the surface, boreholes, and trenches and studied by transmitted and reflected polarization microscope (Nikon E200). Also, many samples were studied by XRD and EPMA.
 
Result
The Tangedozdan zinc-lead mine includes rock units in the convergent and active margin of the neotethys Ocean in the Mesozoic. These rocks were formed in an eugeocynclinal medium during the Jurassic and early Cretaceous periods (Aghanabati, 2006). Tectonic phenomena, in the form of thrusting and the formation of open folds, joints, and fractures, are considered mineralogy controllers. Two important and major faults related to mineralization have been identified in Tangedozdan. The first fault at a distance of about 650m to the east of Tangedozdan and along the general direction of N158 caused contact between sandy limestone deposits and calcareous sandstone, and the fault has played an important role in mineralization. The second fault, at a distance of about 450 m to the east of Tangedozdan, with the general direction of N150, along with the past fault, has played an important role in mineralization, and together with the sub-faults, they are considered to be structural controllers of mineralization.
Mineralogical studies as well as the use of EDS spectra and XRD have shown presence of non-sulfide minerals such as smithsonite, cerussite, hemimorphite, barite, and sulfide minerals such as sphalerite and galena, which are paragenesis of each other. The transparent minerals are calcite and dolomite and barite and Quartz to a lesser extent, which are placed in the space between the opaque minerals. Quartz is mainly observed heterogeneously and only in some empty spaces. The formation of empty spaces between the crystals and the fractures is the result of the dolomitization phenomenon and it has made possible the concentration of ore-bearing fluids and the deposition of valuable zinc and lead ores. Hence, mineralization can be expected in parts of the deposit where developing dolomitization and creating empty spaces is possible. Calamine is very similar to carbonate minerals such as dolomite and calcite and has a variety of colors (Wilkinson, 2014; Lecumberri-Sanchez et al., 2014). Therefore, in Tangedozdan, the two-component reagent Zinc Zap was used, which qualitatively shows the presence of zinc-bearing minerals and leads to red and orange colors to identify calamine or non-sulfide minerals that cover zinc and primary sulfide minerals. Accordingly, calamine was identified in field studies in Tangedozdan.
The most important existing alteration includes dolomite, silicic, and carbonate, which can be seen with non-sulfide zinc mineralization such as calamine, and zincian dolomite, which is considered an important sign of mineralization in the region. The dolomitization phenomenon due to the effect of acidic hydrothermal fluids has altered the carbonate wall rock. The structural factor is the main reason for the formation of this type of dolomite and the replacement of magnesium with zinc (Boni et al., 2011; Mondillo et al., 2017).
 
Discussion
Given field evidence, it can be said that zinc and lead have mineralized simultaneously with the faults with the current mechanism of normal dip-slip along with strike-slip component with the general direction of N150 to N158. Then, with penetration of fluids containing zinc and lead, mineralization has taken place along the existing faults and their sub-faults as mineralization structural controllers. According to the studies, the dolomitized process has led to the formation of empty spaces between the crystals as well as fractures and finally the concentration of ore fluids and deposition of valuable zinc and lead ores. The phenomenon of dolomitization has also changed the carbonate wall rock.

Keywords

Smithsonite; Dolomite; Mineralization; Sanandaj-Sirjan; Tangedozdan; Fereydounshahr

References

Adelpour, M. and Rostamipaydar, Gh., 2018. The Study of alteration, mineralization, and fluid inclusion in the Howz-e-Sefid zinc-lead deposit (Central Iran). Iranian Journal of Geology, 47(12): 19–36. (in Persian with English abstract) Retrieved November 20, 2022 from http://geology.saminatech.ir/en/Article/9609

Aghanabati, A., 2006. Geology of Iran. Geological Survey of Iran, 586 pp. (in Persian)

Alavi, M., 1991. Tectonic map of the Middle East: Tehran scale 1:5000000. Geological Survey of Iran.

Amiri, A., 2017. Mineralogical evolutions of carbonate-hosted Zn-Pb-(F-Mo) deposits in Kuhbanan-Bahabad area, Central Iran: metal source approach. Journal of Tethys, 5(1): 001–032. Retrieved November 20, 2022 from https://jtethys.journals.pnu.ac.ir/article_3802_2a22475947e9c3ddd28633398345e689.pdf

Blenkinsop, T.G., 2000. Deformation microstructures and mechanisms in minerals and rocks, Department of Geology. University of Zimbabwe, Harare, Zimbabwe. 150P. Retrieved November 20, 2022 from https://link.springer.com/book/10.1007/0-306-47543-X

Boni, M. and Mondillo, N., 2015. The Calamines and the others: the great family of supergene nonsulfide zinc ores. Review paper. Ore Geology Reviews, 67: 208–233. https://doi.org/10.1016/j.oregeorev.2014.10.025

Boni, M., Mondillo, N. and Balassone, G., 2011. Zincian dolomite: a peculiar dedolomitization case? Geology, 39(2): 183–186. https://doi.org/10.1130/G31486.1

Davies, H.L., 2012. The geology of New Guinea - the cordilleran margin of the Australian continent. Episodes, 35(1): 87–102. https://doi.org/10.18814/epiiugs/2012/v35i1/008

Delavar, S.T., Rasa, I., Lotfi, M., Borg, G., Rashidnejad Omran, N. and Afzal., P., 2014. Geological evidence and ore body facies of TangedezdanZa-Pb (Ag) deposit in Jurassic-cretaceous carbonate sequence, Booeen Miandasht (Isfahan-Iran). Scientific Quarterly Journal of Geoscience. 23(91): 77–88. (in Persian with English abstract). https://doi.org/10.22071/gsj.2014.43777

Ehya, F., Lotfi, M. and Rasa, I., 2010. Emarat carbonate-hosted Zn–Pb deposit, Markazi Province, Iran: A geological, mineralogical and isotopic (S, Pb) study. Journal of Asian Earth Sciences, 37(2): 235–249. https://doi.org/10.1016/j.jseaes.2009.08.007   

Forster, H., 1978. Mesozoic - Cenozonic metallogensis in Iran. Geological Society- London, 135 pp.

Ghazban, F., McNutt, R.H. and Schwarcz, H.P., 1994. Genesis of sediment-hosted Zn-Pb-Ba deposits in the Iran Kouh district, Esfaha area, West-Central Iran. Economic Geology, 89(6): 1262–1278. https://doi.org/10.2113/gsecongeo.89.6.1262

Hill, K.C. and Raza, A., 1999. Arc continental collision in papua guinea-constraints from fission track thermocoronology. Tectonics, 18(6): 950–966. https://doi.org/10.1029/1999TC900043

Holm, R.J., Spandler, C. and Richards, S.W., 2015. Continental collision, orogenesis and arc magmatism of the Miocene Maramuni arc, Papua New Guinea. Gondwana Research, 28(3): 1117–1136. http://dx.doi.org/10.1016/j.gr.2014.09.011

Karimpour, M.H., Malekzadeh Shafaroudi, A., Alaminia, Z., Esmaeili Sevieri, A. and Stern, C.R., 2019. New hypothesis on time and thermal gradient of subducted slab with emphasis on dolomitic and shale host rocks in formation of Pb-Zn deposits of IrankuhAhangaran belt. Journal of Economic Geology. 10(2): 677–706. (in Persian with English abstract) https://doi.org/10.22067/econg.v10i2.76528

Kouhjani, V., Mousivand, F., Rajabi, A., 2016. Structure, texture, ore facies and genesis of Hafthar zinc-lead ore deposit, southwest of Aqda, 9^th conference society of Economic Geology of Iran, Birjand University, Birjand, Iran. (in Persian) Retrieved November 20, 2022 from https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=36&DC=220112

Lawrence, J.D., 2010. Model of the copper and polymetallic vein family of deposits-Applications in Slovakia, Hungary and Romania. International Geology Review. 45(2): 143–156. https://doi.org/10.2747/0020-6814.45.2.143

Lecumberri-Sanchez, P., Romer, R.L., Luders, V. and Bodnar, R., 2014. Genetic relationships between silver-lead zinc mineralization in the Wutong deposit, Guangxi Province and Mesozoic granite magmatism in the Nanling belt, southeast China. Mineralium Deposita, 49: 353–369. https://doi.org/10.1007/s00126-013-0494-z

Luke, G., Nigel, J., Cook, C., Ciobanu, L. and Benjamin, P.W., 2015. Trace and minor elements in galena: A reconnaissance LAICP-MS study. American Mineralogist, 100(2–3): 548–569. https://doi.org/10.2138/am-2015-4862

Miller, E.L., Gehrels, G.E., Pease, V. and Sokolov, S., 2010. Stratigraphy and U-Pb detrital zircon geochronology of Wrangel Island, Russia: Implications for Arctic paleogeography. American Association of Petroleum Geologists Bulletin, 94(5): 665–692. https://doi.org/10.1306/10200909036

Mohajjel, M. and Fergusson, C.L., 2013. Jurassic to Cenozoic tectonics of the Zagros orogeny in northwestern, Iran. International Geology Review. 56(3): 263–287. https://doi.org/10.1080/00206814.2013.853919

Momenzadeh, M., 1976. Stratabound lead-zinc ores in the lower Cretaceous and Jurassic sediments in the Malayer–Esfahan district (west central Iran), lithology, metal content, zonation and genesis. Ph.D. Thesis, University of Heidelberg, Heidelberg, Germany, 300 pp. Retrieved February 8, 2023 from https://www.scirp.org/(S(351jmbntvnsjt1aadkposzje))/reference/ReferencesPapers.aspx?ReferenceID=1787858

Mondillo, N., Boni, M., Joachimski, M., Santoro, L., 2017. C–O Stable Isotope Geochemistry of Carbonate Minerals in the Nonsulfide Zinc Deposits of the Middle East: A Review. Minerals, 7(11): 2–13. https://doi.org/10.3390/min7110217

Montest, L.G.J. and Hirth, G., 2003. Grain size evolution and the rheology of ductile shear zone: from laboratory experiments to postseismic creep. Earth and Planetary Science Letters, 211(1–2): 97–110. https://doi.org/10.1016/S0012-821X(03)00196-1

Nabatian, GH., Rastad, E., Neubauer, F., Honamand, M. and Ghaderi, M., 2015. Iron and FeMn Mineralization in Iran implications for Tethyan metallogeny. Australian Journal of Earth Sciences, 62(2): 211–241. https://doi.org/10.1080/08120099.2015.1002001

Newton, T., 2013. Geochemistry of the Timberville Zn-Pb District, Rockingham County, VA. Ph.D. thesis, University of Maryland, Maryland, USA, 27 pp. Retrieved November 20, 2022 from https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.727.6187&rep=rep1&type=pdf

Peacock, S.M., 1992. Blueschist-facies metamorphism, shear heating and P-T- t paths in subduction shear zones. Journal of Geophysical Research, 97(B12): 17693–17707. https://doi.org/10.1029/92JB01768

Rajabi, A., Rastad, E., Alfonso, P. and Canet, C., 2012a. Geology, ore facies and sulphur isotopes of the Koushk vent-proximal sedimentary-exhalative deposit, Posht-e-Badam Block, Central Iran. International Geology Review, 54(14): 1635–1648. https://doi.org/10.1080/00206814.2012.659106

Rajabi, A., Rastad, E. and Canet, C., 2012b. 2012b. Metallogeny of Permian–Triassic carbonate-hosted Zn–Pb and F deposits of Iran: A review for future mineral exploration. Australian Journal of Earth Sciences, 60(2): 197–216. https://doi.org/10.1080/08120099.2012.754792

Ramazani, M. and Tucker, R.D., 2003. The Saghand region, central Iran, U-Pb geochronology, petrogenesis and implications for Gondwana tectonics. American Journal of Science, 303(7): 622–665. http://dx.doi.org/10.2475/ajs.303.7.622

Ramsay, J.G. and Huber, M.I., 1987. The Techniques of Modern Structural Geology, Vol. 2, Folds and Fractures. Pergamon Press, London, 365 pp.

Schellart, W.P., Stegman, D.R., Farrington, R.J. and Moresi, L., 2011. Influence of lateral slab edge distance on plate velocity, trench velocity, and subduction partitioning. Journal of geophysical research, 116(B10): 1–15. https://doi.org/10.1029/2011JB008535

Soheili, M., Jafarian, M.B. and Abdollahi, M.R., 1992. Geological map of Aligudarz Scale 1:100000. Geological Society of Iran.

Stearns, D.W. 1968. Certain Aspects of Fracture in Naturally Deformed Rocks. In: Riecker, R.E., Ed., NSF Advanced Science Seminar in Rock Mechanics, Air Force Cambridge Research Laboratories Special Report, Bedford, MA, 97–118. Retrieved February 8, 2023 from https://www.scirp.org/(S(351jmbntvnsjt1aadkozje))/reference/referencespapers.aspx?referenceid=2146883

Thiele, O., Alavi, M. and Assefi, R., 1967. Geological map of Golpaygan Scale 1:250000. Geological Society of Iran.

Verdel, C., Wernicke, B.P., Hassanzadeh, J. and Guest, B., 2011. A Paleogene extensional arc flare-up in Iran. Tectonics, 30(3): 1–20. https://doi.org/10.1029/2010TC002809

Whitney, D.L. and Evans, B.W., 2010. Abbreviations for names of rock-forming minerals. American Mineralogist, 95(1): 85–187. http://dx.doi.org/10.2138/am.2010.3371

Wilkinson, J.J., 2014. Sediment-hosted zinc-lead mineralization: Processes and perspectives. Treatise on Geochemistry, 13: 219–248. https://doi.org/10.1016/B978-0-08-095975-7.01109-8

Yasemi, N., Ghaderi, M., Madanipour, M. and Taghilou, B., 2017. Structural control on overprinting high-sulfidation epithermal on porphyry mineralization in the Chodarchay deposit, northwestern Iran. ore Geology Reviews, 86: 212–224. https://doi.org/10.1016/j.oregeorev.2017.01.028