کانه‌ زایی فلزهای پایه اپی‌ ترمال نوع سولفیداسیون حدواسط در کانسار کورچشمه (جنوب‌ غرب تاکستان): شواهد زمین‌ شناسی، کانه‌ زایی و زمین‌ شیمی

زمین شناسی اقتصادی

دوره 16، شماره 2 - شماره پیاپی 41، 1403، صفحه 1-34   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/econg.2024.1087

نویسندگان

سپیده خان‌ احمدلو¹؛ حسین کوهستانی^{* 2}؛ میر علی اصغر مختاری²؛ ناهید رحمتی³

¹کارشناسی ‌ارشد، گروه زمین‌ شناسی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران

²دانشیار، گروه زمین‌ شناسی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران

³کارشناسی ارشد، گروه زمین‌ شناسی، دانشکده علوم، دانشگاه زنجان، زنجان، ایران

چکیده

کانسار سرب- روی- مس کورچشمه در فاصله 40 کیلومتری جنوب‌غرب تاکستان (استان قزوین) و غرب کمربند آتشفشانی مردآباد- بوئین‌زهرا واقع‌شده است. کانه‌زایی به‌ صورت رگه‌های سیلیسی سرب- روی- مس‌دار با میزبان توالی توف و گدازه‌ ائوسن زیرین- میانی رخ‌داده و دارای ارتباط فضایی با توده پیروکسن کوارتز مونزودیوریتی ائوسن میانی است. رگه‌ اصلی کانه‌دار از 70 تا 200 متر درازا و 5/0 تا 2 متر ضخامت دارد. پیریت، کالکوپیریت، گالن، اسفالریت و تنانتیت- تتراهدریت همراه با اندکی پیرولوسیت و پسیلوملان مواد معدنی و کوارتز، کلسیت، سیدریت، باریت و سریسیت- ایلیت مواد باطله هستند. گوتیت، سروزیت، اسمیت‌زونیت، مالاکیت و کوولیت در اثر فرایندهای برون‌زاد تشکیل شده‌اند. انواع بافت کانسنگ شامل دانه‌پراکنده، رگه- رگچه‌ای، بِرشی، شانه‌ای، پوسته‌ای، کاکلی، گل‌کلمی، پرمانند، بازماندی، پُرکننده فضای خالی و جانشینی است. شش مرحله کانه‌زایی در کورچشمه قابل تفکیک است که کانه‌زایی فلزهای پایه به ‌صورت رگه‌ها و برش‌های کوارتز- پیریت- کالکوپیریت- گالن- اسفالریت ± تنانتیت- تتراهدریت در مرحله دوم رخ‌داده است. دگرسانی گرمابی شامل دگرسانی‌های سیلیسی، آرژیلیک حدواسط، کربناتی و پروپیلیتیک است. الگوی عناصر کمیاب و کمیاب خاکی بهنجارشده به کندریت برای نمونه‌های کانه‌دار، توده پیروکسن کوارتز مونزودیوریتی و توف بلورین اسیدی میزبان، مشابه است. این امر بیانگر نقش دگرسانی و شسته‌شدن عناصر از سنگ‌های میزبان آتشفشانی در تشکیل کانه‌زایی است. ویژگی‌های کانه‌زایی در کانسار سرب- روی- مس کورچشمه با کانسارهای اپی‌ترمال نوع سولفیداسیون حدواسط قابل مقایسه است.

کلیدواژه‌ها

کانه‌زایی فلزهای پایه؛ اپی‌ترمال حدواسط؛ کورچشمه؛ تاکستان؛ مردآباد-بوئین‌ زهرا

مراجع

Aghazadeh, M., Hou, Z., Badrzadeh, Z. and Zhou, L., 2015. 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: 385–406. https://doi.org/10.1016/j.oregeorev.2015.03.003

Albinson, T., Norman, D.I., Cole, D. and Chomiak, B., 2001. Controls on formation of low-sulfidation epithermal deposits in Mexico: Constraints from fluid inclusion and stable isotope data. In: T. Albinson and C.E. Nelson (Editors), New Mines and Discoveries in Mexico and Central America. Society of Economic Geologists, Littleton, pp. 1–32. https://doi.org/10.5382/SP.08.01

Alipour-Asll, M., 2019. Geochemistry, fluid inclusions and sulfur isotopes of the Govin epithermal Cu-Au mineralization, Kerman province, SE Iran. Journal of Geochemical Exploration, 196: 156–172. https://doi.org/10.1016/j.gexplo.2018.09.011

Alirezaei, A., Arvin, M. and Dargahi, S., 2017. Adakite-like signature of porphyry granitoid stocks in the Meiduk and Parkam porphyry copper deposits, NE of Shahr-e-Babak, Kerman, Iran: Constraints on geochemistry. Ore Geology Reviews, 88: 370–383.  https://doi.org/10.1016/j.oregeorev.2017.04.023

Aliyari, F., Afzal, P., Harati, H. and Zengqian, H., 2020. Geology, mineralogy, ore fluid characteristics, and 40Ar/39Ar geochronology of the Kahang Cu-(Mo) porphyry deposit, Urumieh-Dokhtar Magmatic Arc, Central Iran. Ore Geology Reviews, 116: 103238. https://doi.org/10.1016/j.oregeorev.2019.103238

Altenberger, F., Raith, J.G., Bakker, R.J. and Zarasvandi, A., 2022. The Chah-Mesi epithermal Cu-Pb-Zn-(Ag-Au) deposit and its link to the Meiduk porphyry copper deposit, SE Iran: Evidence from sulfosalt chemistry and fluid inclusions. Ore Geology Reviews, 142: 104732. https://doi.org/10.1016/j.oregeorev.2022.104732

Andreeva, E., Matsueda, H., Okrugin, V.M., Takahashi, R. and One, S., 2013. Au-Ag-Te mineralization of the low-sulfidation epithermal Aginskoe deposit, Central Kamchatka, Russia. Resource Geology 63(4): 337–349. https://doi.org/10.1111/rge.12013

Ayati, F., Yavuz, F., Asadi, H.H., Richards, J.P. and Jourdan, F., 2013. Petrology and geochemistry of calc-alkaline volcanic and subvolcanic rocks, Dalli porphyry copper-gold deposit, Markazi Province, Iran. International Geology Review, 55(2): 158–184. https://doi.org/10.1080/00206814.2012.689640

Bienvenu, P., Bougault, H., Joron, J.L., Treuil, M. and Dmitriev, L. 1990. MORB alteration: Rare earth element/non-rare hydromagmaphile element fractionation. Chemical Geology, 82: 1–14. https://doi.org/10.1016/0009-2541(90)90070-N

Boynton, W.V., 1984. Cosmochemistry of the rare earth elements: Meteorite studies. Developments in Geochemistry, 2: 63–114. https://doi.org/10.1016/B978-0-444-42148-7.50008-3

Cooke, D.R. and Simmons, S.F., 2000. Characteristics and genesis of epithermal gold deposits. In: S.G. Hagemann and P.E. Brown (Editors), Gold in 2000. Society of Economic Geologists, Littleton. pp. 221–244. https://doi.org/10.5382/Rev.13.06

Ebrahimi, S., 2016. Study of Dehbala intensive, related alteration and mineralization (south Buin-Zahra). Unpublished M.Sc. Thesis, Imam Khomeini International University, Qazvin, Iran, 167 pp. (in Persian with English abstract)

Eghlimi, B. and Mosavvari, F., 2000. Geological map of Danesfahan (Khiaraj), scale 1:100,000. Geological Survey of Iran.

Einaudi, M.T., Hedenquist, J.W. and Inan, E.E., 2003. Sulfidation state of fluids in active and extinct hydrothermal systems: Transitions from porphyry to epithermal environments. In: S.F. Simmons and I. Graham (Editors.), Volcanic, geothermal, and ore-forming fluids: rulers and witnesses of processes within the earth. Society of Economic Geologists, Littleton, pp. 285–313.  https://doi.org/10.5382/SP.10.15

Gemmell, J. B., 2004. Low- and intermediate-sulfidation epithermal deposits. In: D.R. Cooke, C.L. Deyel and J. Pongratz (Editors), 24 Ct Gold Workshop. University of Tasmania, Hobart, Australia, pp. 57–63. Retrieved April 22, 2023, from http://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-detail.pl?biblionumber=40195

Ghorbani, A., Kouhestani, H. and Mokhtari, M.A.A., 2022. Genesis of the Varmazyar Pb–Zn (Ag) occurrence, Tarom-Hashtjin metallogenic belt: Insights from ore geology, geochemistry and fluid inclusion studies. Journal of Economic Geology, 14(1): 1–38. (in Persian with extended English abstract). https://doi.org/10.22067/econg.2021.51947.86716

Golestani, M., Karimpour, M.H., Malekzadeh Shafaroudi, A. and Haidarian Shahri, M.R., 2018. Geochemistry, U-Pb geochronology, and Sr-Nd isotopes of the Neogene igneous rocks, at the Iju porphyry copper deposit, NW Shahr-e-Babak, Iran. Ore Geology Reviews, 93: 290–307. https://doi.org/10.1016/j.oregeorev.2018.01.001

Goodarzi, Z., 2012. Study of mineralization, alteration, and ore-forming fluid evolution in the Lak polymetallic mineralization zone, southwest of Buin-Zahra, Qazvin Province. Unpublished M.Sc. Thesis, Payam-e Noor University, Tehran, Iran, 222 pp. (in Persian with English abstract)

Habibi, J., 2007. Studies of mineralogy, geochemistry, and genesis of Lak polymetallic deposit in volcanic rocks, SW Buin-Zahra, Qazvin Province. Unpublished M.Sc. Thesis, Tabriz University, Tabriz, Iran, 155 pp. (in Persian with English abstract)

Hedenquist, J.W., Arribas, A. and Gonzalez-Urien, E., 2000. Exploration for epithermal gold deposits. In: S.G. Hagemann and P.E. Brown (Editors), Gold in 2000. Society of Economic Geologists, Littleton, pp. 245–277. https://doi.org/10.5382/Rev.13.07

Heidari, S.M., Daliran, F., Paquette, J.L. and Gasquet, D., 2015. Geology, timing, and genesis of the high sulfidation Au(–Cu) deposit of Touzlar, NW Iran. Ore Geology Reviews, 65(2): 460 – 486. http://dx.doi.org/10.1016/j.oregeorev.2014.05.013

Humphris, S.E., 1984. The mobility of the rare earth elements in the crust. In: P. Henderson (Editor), Developments in Geochemistry. Elsevier, Amsterdam, pp. 317–342. https://doi.org/10.1016/B978-0-444-42148-7.50014-9

John, D.A., 2001. Miocene and early Pliocene epithermal gold-silver deposits in the northern Great Basin, western USA: Characteristics, distribution, and relationship to magmatism. Economic Geology, 96(8): 1827–1853. https://doi.org/10.2113/gsecongeo.96.8.1827

Kazemi, K., Modabberi, S., Xiao, Y., Sarjoughian, F. and Kananian, A., 2022. Geochronology, whole-rock geochemistry, Sr-Nd isotopes, and biotite chemistry of the Deh-Bala intrusive rocks, Central Urumieh-Dokhtar Magmatic Arc (Iran): Implications for magmatic processes and copper mineralization. Lithos, 408–409: 106544. https://doi.org/10.1016/j.lithos.2021.106544

Khanahmadlou, S., 2023. Geology, geochemistry, and genesis of Kourcheshmeh Pb-Zn-Cu mineralization, southwest of Takestan. Unpublished M.Sc. Thesis, University of Zanjan, Zanjan, Iran, 74 pp. (in Persian with English abstract)

Kouhestani, H., Ghaderi, M., Chang, Z. and Zaw, K., 2015. Constraints on the ore fluids in the Chah Zard breccia-hosted epithermal Au-Ag deposit, Iran: fluid inclusions and stable isotope studies. Ore Geology Reviews, 65(2): 512–521. https://doi.org/10.1016/j.oregeorev.2013.06.003

Kouhestani, H., Ghaderi, M., Large, R.R. and Zaw, K., 2017. Texture and chemistry of pyrite at Chah Zard epithermal gold-silver deposit, Iran. Ore Geology Reviews, 84: 80–101. https://dx.doi.org/ 10.1016/j.oregeorev.2017.01.002

Kouhestani, H., Ghaderi, M., Zaw, K., Meffre, S. and Emami, M.H., 2012. Geological setting and timing of the Chah Zard breccia-hosted epithermal gold-silver deposit in the Tethyan belt of Iran. Mineralium Deposita, 47(4): 425–440. https://dx.doi.org/10.1007/s00126-011-0382-3

Kouhestani, H., Mokhtari, M.A.A., Chang, Z, Qin, K.Z., and Aghajani Marsa, S., 2022. Fluid inclusion, zircon U-Pb geochronology, and O-S isotopic constraints on the origin and evolution of ore-forming fluids of the Tashvir and Varmazyar epithermal base metal deposits, NW Iran. Frontiers in Earth Science, 10: 990761. https://doi.org/10.3389/feart.2022.990761

Lottermoser, B.G., 1992. Rare earth elements and hydrothermal ore formation processes. Ore Geology Reviews, 7(1): 25–41. https://doi.org/10.1016/0169-1368(92)90017-F

McInnes, B.I.A., Evans, N.J., Belousova, E., Griffin, W.T. and Andrew, R.L., 2003. Timing of mineralization and exhumation processes at the Sar Cheshmeh and Meiduk porphyry Cu deposits, Kerman belt, Iran. In: D.G. Eliopoulos (Editor), Mineral exploration and sustainable development. Society for Geology Applied to Mineral Deposits, Rotterdam, pp. 1197–1200.

Mirnejad, H., Mathur, R., Hassanzadeh, J., Shafie, B. and Nourali, S., 2013. Linking Cu Mineralization to host porphyry emplacement: Re-Os ages of molybdenites versus U-Pb ages of zircons and sulfur isotope compositions of pyrite and chalcopyrite from the Iju and Sarkuh porphyry deposits in southeast Iran. Economic Geology, 108(4): 861–870. https://doi.org/10.2113/econgeo.108.4.861

Mohammaddoost, H., Ghaderi, M., Kumar, T.V., Hassanzadeh, J., Alirezaei, S. and Babu, E.V.S.S.K., 2023. Geology, mineralization, zircon U-Pb geochronology, and Hf isotopes of Serenu porphyry copper prospect, Kerman Cenozoic magmatic arc, southeastern Iran. Ore Geology Reviews, 159: 105540. https://doi.org/10.1016/j.oregeorev.2023.105540

Mohammaddoost, H., Ghaderi, M., Kumar, T.V., Hassanzadeh, J., Alirezaei, S., Stein, H.J. and Babu, E.V.S.S.K., 2017. Zircon U-Pb and molybdenite Re-Os geochronology, with S isotopic composition of sulfides from the Chah-Firouzeh porphyry Cu deposit, Kerman Cenozoic arc, SE Iran. Ore Geology Reviews, 88: 384–399. https://doi.org/10.1016/j.oregeorev.2017.05.023

Mohammadi Niaei, R., Daliran, F., Nezafati, N., Ghorbani, M., Sheikh Zakariaei, J. and Kouhestani, H., 2015. The Ay Qalasi deposit: An epithermal Pb-Zn (Ag) mineralization in the Urumieh–Dokhtar volcanic belt of northwestern Iran. Neues Jahrbuch für Mineralogie-Abhandlungen (Journal of Mineralogy and Geochemistry), 192(3): 263–74.  https://doi.org/10.1127/njma/2015/0284

Murphy, J.B. and Hynes, A.J., 1986. Contrasting secondary mobility of Ti, P, Zr, Nb, and Y in two meta-basaltic suites in the Appalachians. Canadian Journal of Earth Sciences, 23(8): 1138–1144. https://doi.org/10.1139/e86-112

Nogole-sadat, M.A.A. and Hoshmandzadeh, A., 1984. Geological map of Saveh, scale 1: 250,000. Geological Survey of Iran.

Richards, J.P., Wilkinson, D. and Ullrich, T., 2006. Geology of the Sari Gunay epithermal gold deposit, northwest Iran. Economic Geology, 101(8): 1455–1496. https://doi.org/10.2113/gsecongeo.101.8.1455

Rolland, Y., Cox, S., Boullier, A. M., Pennacchioni, G. and Mancktelow, N., 2003. Rare earth and trace element mobility in mid-crustal shear zones: insights from the Mont Blanc Massif (Western Alps). Earth Planet Scientific Letters, 214(1): 203–219. https://doi.org/10.1016/S0012-821X(03)00372-8

Salehi, T., Ghaderi, M. and Rashidnejad-Omran, N., 2011. Mineralogy and geochemistry of rare earth elements in Qomish Tappeh Zn–Pb–Cu (Ag) deposit, southwest of Zanjan. Journal of Economic Geology, 2(2): 235–254. (in Persian with English abstract) https://doi.org/10.22067/ECONG.V2I2.7853

Salehi, T., Ghaderi, M. and Rashidnejad-Omran, N., 2015. Epithermal base metal-silver mineralization at Qomish Tappeh deposit, southwest of Zanjan. Scientific Quarterly Journal, Geosciences, 25(97): 329–346. (in Persian with English abstract) https://doi.org/10.22071/GSJ.2015.41519 

Saunders, J.A., Hofstra, A.H., Goldfarb, R.J. and Reed, M.H., 2014. Geochemistry of hydrothermal gold deposits. In: H.D. Holland and K.K. Turekian (Editors) Treatise on Geochemistry. Elsevier-Pergamon, Oxford, England, pp. 33–424. http://dx.doi.org/10.1016/B978-0-08-095975-7.01117-7

Shafiei, B., Niedermann, S., Sósnicka, M. and Gleeson, S.A., 2022. Microthermometry and noble gas isotope analysis of magmatic fluid inclusions in the Kerman porphyry Cu deposits, Iran: constraints on the source of ore-forming fluids. Mineralium Deposita, 57: 155–185. https://doi.org/10.1007/s00126-021-01041-8

Sillitoe, R.H. and Hedenquist, J.W., 2003. Linkages between volcano-tectonic settings, ore fluid compositions, and epithermal precious-metal deposits. In: S.F. Simmons and I. Graham (Editors), Volcanic, geothermal, and ore-forming fluids: Rulers and witnesses of processes within the Earth. Economic Geology Special Publication 10, Littleton, pp. 315–343. Retrieved April 24, 2023, from https://www.researchgate.net/publication/285488888

Simmons, S.F., White, N.C. and John, D.A., 2005. Geological characteristics of epithermal precious and base metal deposits. In: J.W. Hedenquist, J.F.H. Thompson, R.J. Goldfarb and J.P. Richards (Editors), One Hundredth Anniversary Volume. Society of Economic Geologists, Littleton, pp. 485–522. https://doi.org/10.5382/AV100.16

Sohbatloo, M., Kouhestani, H. and Mokhtari, M.A.A., 2022. Intermediate-sulfidation epithermal base and precious metals mineralization in the Qebchaq deposit (NW Qarachaman, East Azerbaijan): Geology, mineralization, and geochemical evidence. Journal of Economic Geology, 15(1):  53–85. (in Persian with extended English abstract) https://doi.org/10.22067/econg.2022.75340.1041

Taghipour, N., Aftabi, A. and Mathur, R., 2008. Geology and Re-Os geochronology of mineralization of the Meiduk porphyry copper deposit, Iran. Resource Geology, 58(2): 143–160. https://doi.org/10.1111/j.1751-3928.2008.00054.x

Tale Fazel, E., Alaei Moghtader, N. and Oroji, A., 2022a. Temperature condition, sulfidation state, and gold formation mechanism of the Atash-Anbar polymetallic deposit (south Qazvin) based on mineralization, alteration, and chemistry of ore minerals. Petrological Journal, 13(2): 121–150. (in Persian with English abstract) https://doi.org/10.22108/ijp.2020.124097.1194

Tale Fazel, E., Moradi, M. and Najafi Rashed, S., 2022b. Genesis of Eocene volcanic-hosted copper deposits in the Kuh-e-Jarou Mining District (South Eshtehard): constraints from geology, mineralization and fluid inclusions. Journal of Economic Geology, 14(1): 67–108. (in Persian with English abstract) https://dx.doi.org/10.22067/econg.2021.52100.88283

Tale Fazel, E., Nevolko, P.A., Pǎsava, J., Xie, Y., Alaei, N. and Oroji, A., 2023. Geology, geochemistry, fluid inclusions, and H-O-C-S-Pb isotope constraints on the genesis of the Atash-Anbar epithermal gold deposit, Urumieh–Dokhtar magmatic arc, central-northern Iran: Ore Geology Reviews, 153: 105285. https://doi.org/10.1016/j.oregeorev.2022.105285

Thompson, R.N., 1982. Magmatism of the British Tertiary volcanic province. Scottish Journal of Geology, 18(1): 49–107. https://doi.org/10.1144/sjg18010049

Wang, L., Qin, K.Z., Song, G.Y. and Li, G.M., 2019. A review of intermediate sulfidation epithermal deposits and subclassification. Ore Geology Reviews, 107: 434–456. https://doi.org/10.1016/j.oregeorev.2019.02.023 

White, N.C. and Hedenquist, J.W., 1990. Epithermal environments and styles of mineralization: Variations and their causes, and guidelines for exploration. Journal of Geochemical Exploration, 36(1–3): 445–474. https://doi.org/10.1016/0375-6742(90)90063-G

Whitford, D.J., Korsch, M.J., Porritt, P.M. and Craven, S.J., 1988. Rare earth element mobility around the volcanogenic polymetallic massive sulfide deposit at Que River, Tasmania, Australia. Chemical Geology, 68(1–2): 105–119. https://doi.org/10.1016/0009-2541(88)90090-3

Whitney, D.L. and Evans, B.W., 2010. Abbreviations for names of rock-forming minerals. American Mineralogist, 95(1): 185–187. https://doi.org/10.2138/am.2010.3371

Yousefi, M., Rashidnejad Omran, N., Lotfi, M. and Bazoobandi, M.H., 2017. Copper and gold mineralization features in Deh Bala region, south of Takestan: Open Journal of Geology, 7(7): 1022-1046. https://doi.org/10.4236/ojg.2017.77069

Zamanian, H., Rahmani, S., Zareisahamieha, R., Pazokia, A. and Yang, X.Y., 2020. Geochemical characteristics of igneous host rocks of Lubin-Zardeh Au–Cu deposit, NW Iran. Ore Geology Reviews, 122: 103496. https://doi.org/10.1016/j.oregeorev.2020.103496

Zarasvandi, A., Liaghat, S. and Zentilli, M., 2005. Geology of the Darreh-Zerreshk and AliAbad porphyry copper deposits, Central Iran. International Geology Review, 47(6): 620–646. https://doi.org/10.2747/0020-6814.47.6.620