زمین شیمی، کانی‌سازی و دگرسانی مس پورفیری در منطقه گروه، ساردوئیه (استان کرمان) با نگرشی به نبود پهنه سوپرژن

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه محقق اردبیلی

2 دانشگاه شهید بهشتی

3 سازمان زمین شناسی و اکتشافات معدنی کشور،

چکیده

منطقه اکتشافی گروه در 19 کیلومتری شمال شرق شهر ساردوئیه در استان کرمان واقع است. واحدهای سنگ­شناسی اصلی در این منطقه از قدیم به جدید عبارتند از واحد‌های آتشفشانی ائوسن شامل آندزیت و آندزی بازالت و واحد‌های نفوذی الیگومیوسن شامل دیوریت، کوارتز دیوریت و گرانودیوریت و واحدهای آذرآواری شامل توف و برش هستند. دگرسانی در منطقه گروه به دلیل نفوذ توده‌های نفوذی به درون سنگ‌های آتشفشانی از گسترش چشم­گیری برخوردار است. دگرسانی­های عمده منطقه پروپلیتی، فیلیک و تا حدودی پتاسیمی هستند. کانه‌های مس­دار (کالکوپیریت و مالاکیت) در رخنمون کوچکی از واحد گرانودیوریت پورفیری در شمال شرقی منطقه دیده می‌شوند. بررسی­های زمین شیمیایی و نمودارهای محیط زمین­ساختی نشان داد که سری ماگمایی این سنگ­­ها در گستره آهکی قلیایی قرار دارد و متاآلومین تا پرآلومین ضعیف بوده و از گرانیتوئیدهای نوع I هستند. کانی­سازی فقط در بخش درونزد دیده می‌شود و شواهد پهنه سوپرژن بسیار ضعیف است. حضور دگرسانی پتاسیمی در سطح و همچنین پستی و بلندی خشن ناحیه نشان دهنده بالاآمدگی و فرسایش شدید منطقه است که به احتمال بسیار باعث انتقال مس به مناطق پایین دست شده است.       

کلیدواژه‌ها


عنوان مقاله [English]

Geochemistry, mineralization and alteration of porphyry copper in the Grouh area, Sardouya (Kerman Province) with a view to the lack of supergene zone

نویسندگان [English]

  • Seyedeh Narges Sadati 1
  • Mohammad Jalali Khalil Abadi 2
  • Mohammad Yazdi 2
  • Ayda Mohebi 3
1
2
3
چکیده [English]

The Grouh area is located about 19 km north-east of Sarduyeh city in Kerman Province. The major lithological units in this area include Eocene andesite and andesitic basalt. Oligo-Miocene intrusive units include diorite, quartz diorite and granodiorite; while pyroclastic units include tuff and breccia. The alteration in the Grouh area is remarkable due to the penetration of the intrusive masses into the volcanic rocks. Propylitic, phyllic and  potassic alteration in the northern and southern parts of the range is widely spread. Copper ore deposits (chalcopyrite and malachite) are found in small outcrops in the microporous porphyry granodiorite in the northeastern region. Mineralization can be seen only in hypogen part, and evidence of supergene zone is very weak.. The presence of potassic alteration at the surface as well as the rough topography of the area indicates a high upsurge and severe erosion in the studied area, which possibly led to the transfer of copper to the downstream areas.

کلیدواژه‌ها [English]

  • Grouh
  • Sardouya
  • hypogen alteration
  • supergene alteration
  • copper mineralization
[1] Shafiei B., Haschke M. Shahabpour J., "Recycline of orogenic arc crust triggers porphyry Cu mineralization in Kerman Cenozoic arc rocks south eastern Iran": Mineralization deposit 44(2009) 265 – 283.

[2]Dorany M., Moradeyan A., "Geochemical and tectonomagmatic investigation of gabbros in southwest of Shahr-Babak, Kerman province (in Persian)", Iranian Journal of Crystallography and Mineralogy 1 (2007) 193-210.

[3]Alirezaie A., Alyani F., Moradian A., "The study of petrography, geochemical characteristics and tectono magmatic setting of Meiduk porphyry copper deposit, Shahrebabak- Kerman (in Persian)", Iranian Journal of Crystallography and Mineralogy 3 (2012) 441-454.

[4] Mohebi A ., Behzadi M ., Mirnejad H., Taghizadeh H., "Identifying Areas of Copper Porphyry Alteration Haloes in Hanza Mountain Located in South of Dehaj-Sarduiyeh Zone, using ASTER Data(in Persian) ", Iranian Journal of Remote Sencing & GIS 2 (2013) 53-64.

[5]Ravankhah A., Moayyed m., Amini S., "Studies of Geology , Petrology , Economic geology and Alteration zones in porphyry copper deposit of Dare-zar (south west of Kerman) (in Persian)", Iranian Journal of Geology 12 (2010) 63-76.

[6]Ahmadi moghdam P., Ahmadi pour H., "Geochemistry and petrogenesis of the Cheheltan Mountain volcanic rocks; south-west of Bardsir (Kerman Province) (in Persian)", Iranian Journal of Crystallography and Mineralogy 1 (2014) 37-48.

[7] Taghipour N., Aftabi A., and Mathur R., "Geology and Re-Os Geochronology of Mineralization of the Miduk Porphyry Copper Deposit", Resource Geology 2 (2008) 143–160.

[8]Chekanimoghadam M., Tahmasbi Z., Ahmadi Khalaji A., "Mineralogy, geochemistry and origin of Baft northeast volcanic rocks (south Kerman): Evidence for volcanic arc magmatism in Uromieh-Dokhtar magmatic belt (in Persian)", Iranian Journal of Crystallography and Mineralogy 4 (2017) 743-760.

[9] Safiei B., "Lead igneous rocks and porphyry copper deposit from the Kerman Cenozoic magmatic arc(SE Iran), and their magmatic – metallogenetic implications", ore geology reviews 23 (2010) 27-36.

[10] Dimitrijevic M. D., "Geology of Kerman region", geology survey of Iran (1973).

[11] Berberian, M; King, g . c. p., "Toward a paleogeography and tectonic evolution of Iran", Earth science.18(1981) 215 – 265.

[12] Sahaabpour J., "Tectonic evolution of the orogenic belt in the region located between Kerman and Neyriz", Jornal of Asian Earth science 24 ( 2005) 405 – 417.

[13] Le Bas. M. J., Le Maitre W., Streckeisen A., Zanettin B., "The classification of the volcanic rocks based on the total alkali-silica diagram", Journal of Petrology, 27 (1986) 745-750.

[14] Irvin T. N., Baragar W. R. A., "A guide to the chemical classification of the common volcanic rocks", Canadian. Jour. Eart. Sci., 8(1971)523-548.

[15] Chappell B.W., white A.J.R., "Two contrasting granite types", Pasific Geol, 8 (1983) 173- 174.

[16] Maniar P. D., Piccoli P. M., "Tectonic discrimination of granitoids", Geo. Soc. Am. Bull, 101(1989) 635-643.

[17] Ranjbar H., Shahriari H., "Comparison of ETM+ and ASTER data for hydrothermal alteration mapping in the central part of the Dehaj-Sarduyeh belt, Kerman Province (in Persian)", Iranian Journal of Crystallography and Mineralogy 2 (2006) 367-382.

[18] Hezarkhani A," Hydrothermal evolution of the Sar-Cheshmeh porphyry Cu–Mo deposit, Iran: evidence from fluid inclusions", Journal of Asian Earth Sciences 28( 2006) 409-422.

[19] McMillan W. J., Panteleyev A., "Porphyry Copper Deposits, in Roberts, R.G, and Sheahan, P.A, (eds.)", Geoscience Canada, Reprint Series 3(1986), 194.

[20] Sinclair W. D., "Porphyry deposit, Mineral deposit of Canada", Geological association of Canada special publication 5 (2007).223-243.

[21] Hosseinzadeh GH., Mouayed M., Esfehanpour R., "Supergene processes in Sonajil porphyry copper deposit with respect to using of leached capping for estimation of supergene enrichment in porphyry copper deposits (in Persian)", Iranian Journal of Geology 10 (2010) 85-96.

[22] Asadi S., Moore F., Zarasvandi A., "Discriminating productive and barren porphyry copper deposits in the southeastern part of the central Iranian volcano-plutonic belt, Kerman region, Iran", A review. Earth-Science Reviews, 138 (2014) 25-46.

[23] Sillito R. H., "Supergene oxidized and enriched porphyry copper and related deposit", Economic Geology (2005), 723-768.

[24] Sillito R. H., "Porphyry copper systems", Economic geology, 105(2010) 3-41.

[25] Hezarkhani A., Williams-Jones A. E., "Controls of alteration and mineralization in the Sungun porphyry copper deposit, Iran: Evidence from fluid inclusion and stable isotopes", Economic Geology, 93(1998) 651–670.