SHRIMP zircon U–Pb and biotite and hornblende Ar–Ar geochronology of Sungun, Haftcheshmeh, Kighal, and Niaz porphyry Cu–Mo systems: evidence for an early Miocene porphyry-style mineralization in northwest Iran

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• 作者：Shohreh Hassanpour ; Saeed Alirezaei ; David Selby…
• 关键词：Porphyry copper ; Sungun ; Haftcheshmeh ; Arasbaran ; Iran ; SHRIMP Zircon U–Pb ; Ar–Ar geochronology
• 刊名：International Journal of Earth Sciences
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：104
• 期：1
• 页码：45-59
• 全文大小：4,274 KB
• 参考文献：1. Alirezaei S, Mohammadzadeh Z (2009) Hydrothermal alteration-mineralization at Chahfiroozeh Porphyry Copper Deposit, Kerman Province, Southern Iran. AGU 2009 Joint Assembly, Toronto, GA71A-15
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  10. Hassanpour S (2010) Metallogeney and mineralization of Cu-Au in Arasbaran Zone, NW of Iran, Unpublished PhD. Thesis, Shahid Beheshti University, Iran
  11. Hassanpour S (2013) The alteration, mineralogy and geochronology (SHRIMP U-Pb and 40Ar/39Ar) of copper- bearing Anjerd skarn, north of the Shayvar Mountain, NW Iran. Int J Earth Sci 102:687-99 CrossRef
  12. Hassanzadeh J (1993) Metallogenic and tectono-magmatic events in the SE sector of the Cenozoic active continental margin of Iran (Shahr e Babak area, Kerman province), Ph.D. thesis, Univ. CLA, USA, 204 p
  13. Hezarkhani A, Williams Jones AE, Gammons C (1997) Copper solubility and deposition conditions in the potassic and phyllic alteration zones, at the Sungun Porphyry Copper Deposit, Iran, Geological Association Canada—Mineralogical Association Canada (GAC-MAC) Annual Meeting. Ottawa 50, A-67 1997
  14. Kirkham RV, Dunne KP (2000) World distribution of porphyry, porphyry-associated skarn, and bulk-tonnage epithermal deposits and occurrences, Geological Survey of Canada, Open File, 3792, 26
  15. Ludwig KR (1999) User’s manual for Isoplot/Ex, version 2.10: a geochronological tool kit for Microsoft Excel. Berkeley Geochronology Center Special Publication No. 1a, 2455 Ridge Road, Berkeley CA 94709, USA
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  18. McInnes BIA, Evans NJ, Belousova E, Griffin WL (2003) Porphyry copper deposits of the Kerman Belt, Iran. Timing of mineralization and exhumation processes, CSIRO. Sci Res Rep 41
  19. McInnes BIA, Evans NJ, Fu FQ, Garwin S, Belousova E, Griffin WL, Bertens A, Sukama D, Permanadewi S, Andrew RL, Deckart K (2005a) Thermal history analysis of selected Chilean, Indonesian, and Iranian porphyry Cu Mo-Au deposits. In: Porter TM (ed) Supper porphyry copper and gold deposits: a global perspective. PGC Publishing, Adelaide, pp 1-6
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geology
  Geophysics and Geodesy
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1437-3262

文摘

The Cenozoic Urumieh–Dokhtar magmatic belt (UDMB) extends for over 2,000?km from northwest to southeast Iran and is characterized by dominantly calc-alkaline volcanic, pyroclastic, and intrusive rocks. The UDMB hosts numerous porphyry-type Cu?±?Mo deposits, mostly distributed in two separate areas, one known as the Kerman copper belt (KCB) in the south, and the other, here referred to as the Arasbaran Metallogenic Zone (AMZ), in the north, of the UDMB. The two areas are represented by two world-class Cu–Mo deposits, Sarcheshmeh (1,200 Mt of ore at 0.69?% Cu and 300?ppm Mo) and Sungun (>500 Mt of ore at 0.69?% Cu and ~250?ppm Mo), respectively. Chronology data were obtained for the Sungun, Haftcheshmeh, Kighal, and Niaz deposits in the AMZ. The Sungun deposit is associated with a suite of porphyritic granodiorite to monzodiorite stocks and late dykes intruding older andesitic lavas and limestones. SHRIMP zircon U–Pb data indicate that the host andesites were emplaced at 27.65?±?0.51?Ma (±0.2σ). The main Sungun porphyritic intrusion crystallized at 20.69?±?0.37 (±0.2σ) Ma. The Haftcheshmeh deposit is associated with a porphyritic granodiorite body intruding an older gabbro-diorite intrusion. Primary magmatic hornblende from the gabbro-diorite host rock yielded a 40Ar/39Ar plateau age of 27.47?±?0.17?Ma. The main porphyritic intrusion crystallized at 19.46?±?0.39?Ma. The Kighal porphyry system is associated with a porphyritic monzonite body intruding into older andesitic and dacitic lavas, and the Niaz porphyry system is associated with a porphyritic granodiorite stock cutting through an older monzodiorite intrusion. For the Kighal and Niaz, secondary biotite concentrates collected from potassic alteration zones in the parent porphyritic bodies yielded plateau ages of 20.1?±?1.8 and 22.14?±?0.13?Ma, respectively. The timing of the porphyritic intrusions and the associated mineralizations in the AMZ is considerably older than that in KCB in southern UDMB (14-?Ma). There is evidence that the AMZ formed on a separate arc related to the southern lesser Caucasus subduction zone. The arc extends from northwest Iran to Armenia and Azerbaijan to the north. Similar deposits of the same age have been discovered in Armenia, exemplified by Kajaran and Dastakert.