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mahdavi P, Jafari-Rad A, Heuss-Aßbichler S, Lotfi M, Nezafati N. Geology, mineralogy and occurrence of gold minerals in oxide part of the Shadan copper-gold mine, Southern Khorasan. www.ijcm.ir 2023; 31 (3) :553-564
URL: http://ijcm.ir/article-1-1804-en.html
URL: http://ijcm.ir/article-1-1804-en.html
Parivash Mahdavi * 
1, Alireza Jafari-Rad1 , Soraya Heuss-Aßbichler2 , Mohamad Lotfi3 , Nima Nezafati4
1, Alireza Jafari-Rad1 , Soraya Heuss-Aßbichler2 , Mohamad Lotfi3 , Nima Nezafati4
1- Department of Earth Science ,Science and Research Branch, Islamic Azad University, Tehran, Iran.
2- Department of Earth and Environmental Sciences, Ludwig-Maximilians
3- Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran
4- Department of Earth Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran and Deutsches Bergbau-Museum, Bochum, Germany
2- Department of Earth and Environmental Sciences, Ludwig-Maximilians
3- Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, Iran
4- Department of Earth Sciences, Islamic Azad University, Science and Research Branch, Tehran, Iran and Deutsches Bergbau-Museum, Bochum, Germany
Abstract: (1035 Views)
The Shadan Porphyry copper-gold ore is located in eastern margin of Tertiary volcano-plutonic belt of the Lut block. Hydrothermal Magmatic solutions of granite-granodiorite stock porphyry rocks that are generally intruded in the Eocene volcanic rocks resulted in vast potassic, potassic-phyllic, argillic and propylitic alterations in the area. Mineralization in the Shadan ore has been occurred as porphyry, epithermal-vein and hydrothermal breccia. Mineralization is mostly occurred as scattered, stockworks in granodioritic mass and vein type as sulphide, quartz and carbonate veins, trending northwest-southeast. Mineralization are recognized in two types: oxidized (hematite, magnetite, limonite, goethite) and sulfide (pyrotite, chalcopyrite ,bornite and covelite). According to microscopic and thermometric studies, genesis of the Shadan copper- gold ore is porphyry-epitermal. The results analysis on the primary ore show that the main metallic minerals in the ore are copper and gold. The EDX spectrum of scanning electron microscopy (SEM) on 53 gold particles shows that gold particles are in the form of native gold and electrum is between 1 and 10 microns in size. The occurrence of gold includes mono gold, trapping gold and intergranular gold. Gold grains are within the limonite, and hematite .
References
1. [1] Ruttner A., Stöcklin J., "Geological map of Iran", scale 1: 1000, 000. Geological Survey of Iran (1967).
2. [2] Eftekharnejad J., Stockline G., "Geological map of Sarchahshour, 1:100 000", Geological Survey of Iran (in Persion) (1972).
3. [3] Shahab pour J., "Economic Geology" (In persion) (2015).
4. [4] Aghanabati A., "Geological of Iran", Geological Survey of Iran, (2004) 606 pp. (in Persion)
5. [5] Siahcheshm K., Calagari A.A., Abedini A., "Hydrothermal evolutions at the Maher-Abad porphyry Cu-Au deposit, South Khorasan, Iran: evidence from fluid inclusions", Ore Geology Reviews, v.58, p. 1-13 (1st rank of Science Direct Top 25 Hottest paper, October to December 2013) (2014). [DOI:10.1016/j.oregeorev.2013.10.005]
6. [6] Siahcheshm K., Calagari A.A., Abedini A., Sindern S., "Elemental mobility and mass changes during alteration/mineralization in Maher-Abad porphyry copper-gold deposit, east of Iran", Periodico di Mineralogia, v 83, 1 (2014) 55-76. [DOI:10.1016/j.oregeorev.2013.10.005]
7. [7] Siahcheshm K., Calagari A.A., Abedini A., Lentz D.R., "Halogen signatures of biotites from the Maher-Abad porphyry copper deposit, Iran: characterization of volatiles in syn-to post-magmatic hydrothermal fluids", International Geology Review, v.54 (2012) p. 1353-1368. [DOI:10.1080/00206814.2011.639487]
8. [8] Arjamandzadeh S., "Study of mineralization, geochemistry, dating and determination of tectonomagmatic position of intrusive rocks in Deh Salam and Chah-Shalghami indexes of Lut block, East, Iran", PhD thesis in economic geology of Ferdowsi University. 369 pp. (2012).
9. [9] Abdi M., Karimpour M. H, "Geology, metamorphism, mineralogy, petrogenesis, dating, geochemistry and airborne geophysics of Koh Shah exploration area, southwest of Birjand", Iranian Journal of Crystallography and Mineralogy, 20, 2 (2014) 77-108.
10. [10] Mirzaei Raini R., Ahmadi A., Mirenjad H., "Mineralogical investigations and fluids involved in Mahour polymetallic deposit, east of Lut Block, Central Iran", Iranian Journal of Crystallography and Mineralogy, 20, 2 (2014) 307-318.
11. [11] Richards J.P., Spell T., Rameh E., Razique A., Fletcher T., "High Sr/Y magmas reflect arc maturity, high magmatic water content, and porphyry Cu±Mo±Au potential: Examples from the Tethyan arcs of central and eastern Iran and western Pakistan", Economic Geology, 107(2), (2012) pp.295-332. [DOI:10.2113/econgeo.107.2.295]
12. [12] Shafaroudi A.M., Karimpour M.H., Stern C.R., "The Khopik porphyry copper prospect, Lut Block, Eastern Iran: geology, alteration and mineralization, fluid inclusion, and oxygen isotope studies", Ore Geology Reviews, 65, (2015)pp.522-544. [DOI:10.1016/j.oregeorev.2014.04.015]
13. [13] Siahcheshm K., Calagari A.A., Abedini A., "Hydrothermal evolution in the Maher-Abad porphyry Cu-Au deposit, SW Birjand, Eastern Iran: evidence from fluid inclusions", Ore Geology Reviews, 58 (2014) pp.1-13. [DOI:10.1016/j.oregeorev.2013.10.005]
14. [14] Shishevan V.G., Jafari M.R., Alilo B.H., Moayed M., "Application of number-size fractal model in geoelectrical data interpretation for Cu-Au Shadan porphyry deposit exploration, SE Iran", Advances in Environmental Biology, (2013) pp.2142-2151.
15. [15] Aghazadeh M., Hou Z., Badrzadeh Z., Zhou L., "Temporal-spatial distribution and tectonic setting of porphyry copper deposits in Iran: constraints from zircon U-Pb and molybdenite Re-Os geochronology", Ore geology reviews, 70, (2015) pp.385-406. [DOI:10.1016/j.oregeorev.2015.03.003]
16. [16] Arjmandzadeh R., Santos J.F., "Sr-Nd isotope geochemistry and tectonomagmatic setting of the Dehsalm Cu-Mo porphyry mineralizing intrusives from Lut Block, eastern Iran", International Journal of Earth Sciences, 103(1) (2014) pp.123-140. [DOI:10.1007/s00531-013-0959-4]
17. [17] KarandSaderjahan Co., "Geological map of Shadan exploratory area, scale 1:5000", (In persion) (2007).
18. [18] KarandSaderjahan Co., "Geological map of Shadan exploratory area, scale 1:1000", (In persion) (2015).
19. [19] KarandSaderjahan Co., "Report on completing exploratory operations in Shadan ore", (2015)394 pp. (in Persion).
20. [20] Rio Tinto, "Report on Shadan Cu-Au Prospect", 42 (2004).
21. [21] Geopersia, 1399; 10(2): 263-275. doi: 10.22059/geope.2019.288610.648502.
22. [22] Becker S.P., Fall A., Bodnar R. J., "Synthetic fluid inclusions. XVII. PVTX properties of high salinity H2O-NaCl solutions (>30 wt% NaCl): application to fluid inclusions that homogenize by halite disappearance from porphyry copper and other hydrothermal ore deposits", Economic Geology. 103 (2011) p.539-554. [DOI:10.2113/gsecongeo.103.3.539]
23. [23] Sillitoe R.H., "Porphyry copper systems", Economic geology, 105(1) (2010) pp.3-41. [DOI:10.2113/gsecongeo.105.1.3]
24. [24] Sillitoe R.H., "Gold-rich porphyry deposits: descriptive and genetic models and their role in exploration and discovery", Reviews in Economic Geology 13(2000)315-345 [DOI:10.5382/Rev.13.09]
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