DOI: 10.1007/s00531-014-1071-0
Scopus记录号: 2-s2.0-84922078609
论文题名: 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
作者: Hassanpour S. ; Alirezaei S. ; Selby D. ; Sergeev S.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 104, 期: 1 起始页码: 45
结束页码: 59
语种: 英语
英文关键词: Arasbaran
; Ar–Ar geochronology
; Haftcheshmeh
; Iran
; Porphyry copper
; SHRIMP Zircon U–Pb
; Sungun
英文摘要: 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 (14–7 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. © 2014, Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922078609&doi=10.1007%2fs00531-014-1071-0&partnerID=40&md5=d64ba13512059e7a2b493323db5f3f56
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70470
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Geology, Payame Noor University, PO BOX 19395-3697, Tehran, Iran; Department of Earth Sciences, Shahid Beheshti University, Tehran, Iran; Department of Earth Sciences, Durham University, Durham, United Kingdom; A.P. Karpinsky, Russian Geological Research Institute (VSEGEI), St. Petersburg, Russian Federation
Recommended Citation:
Hassanpour S.,Alirezaei S.,Selby D.,et al. 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[J]. International Journal of Earth Sciences,2014-01-01,104(1)