Rare earth element signatures of economic and sub-economic porphyry copper systems in Urumieh–Dokhtar Magmatic Arc (UDMA), Iran

Zarasvandi, Alireza; Rezaei, Mohsen; Sadeghi, Martiya; Lentz, David R.; Adelpour, Mansour; Pourkaseb, Houshang

doi:10.1016/j.oregeorev.2015.01.010

Cited by 63 publications

(24 citation statements)

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“…The observed positive U anomalies compared to the Nb indicate the contributions of Uranium from the subduction components (Zheng et al, 2014). These geochemical features are analogous to those of other calc-alkaline Cu ± Mo ± Au porphyry stocks along the UDMA (e.g., Asadi et al, 2014;Richards et al, 2012;Zarasvandi et al, 2015). Shafiei et al (2009), Richards et al (2012 and Asadi et al (2014) demonstrate that hydrous, relatively oxidized calc-alkaline magmas with the high potential to form porphyry Cu ± Mo ± Au deposits were generated during partial melting of thickened mafic lower crustal rocks (MASH zone; Hildreth and Moorbath, 1988) and subsequent ascent and shallow emplacement (4-5 km; Richards, 2013) of these volatile-rich magmas to upper crustal levels.…”

Section: Petrogenic Evolutionmentioning

confidence: 54%

“…It is important to note that abovementioned temporal evolution is coeval with geochemical changes owing to the progression toward high magmatic water content of Miocene mineralized intrusions. Such characteristics are attributed to the maturation of the arc magmatic system over a period of time (Richards et al, 2012;Zarasvandi et al, 2015). On the Rb/Zr vs. Nb tectonomagmatic diagram (Fig.…”

Section: Petrogenic Evolutionmentioning

confidence: 97%

“…11c, where the most samples are plotted below and above the line Eu/Eu ⁄ = 1 (average Eu/Eu ⁄ = 0.91). The lack of significant negative Eu anomalies (Eu/Eu ⁄ % < 0.8) indicate a relatively high magmatic oxidation state and the lack of significant plagioclase fractionation (Richards et al, 2012;Wang et al, 2014;Zarasvandi et al, 2015). Moreover, there is a gradual increasing of Eu/Eu ⁄ with increasing SiO 2 , representing the change of Eu anomalies form negative to either markedly less negative or positive anomalies.…”

Section: Petrogenic Evolutionmentioning

confidence: 99%

“…The former is based on the geochemical characteristics of post-collisional Miocene volcanism in the northwest of UDMA and the latter is based on geodynamic and geochemical features of collisional porphyry intrusions of the southeast of UDMA (Kerman segment; Shafiei et al, 2009). However, it is now generally understood that all mineralized porphyry copper intrusions along the UDMA have adakite or adakite-like geochemical signatures (Zarasvandi et al, 2015).…”

Section: Regional Geologymentioning

confidence: 99%

“…Nevertheless the lack of one or more optimal conditions may lead either to low-grade or barren characteristics of a given porphyry intrusion. The UrumiehDokhtar magmatic arc (UDMA) in Iran is considered as one of the main regions with a high potential for the occurrence of economic porphyry Cu ± Mo ± Au intrusions in the world (e.g., Shafiei et al, 2009;Zarasvandi et al, 2005Zarasvandi et al, , 2015. UDMA is a part of Zagros orogeny, a segment in the western part of Tethyan orogenic and metallogenic belt that extends from the Alps toward the Turkey, Iran, Pakistan, Tibet, and finally southwest Pacific.…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry and fluid characteristics of the Dalli porphyry Cu–Au deposit, Central Iran

Zarasvandi

Rezaei

Raith

et al. 2015

Journal of Asian Earth Sciences

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Section: Petrogenic Evolutionmentioning

confidence: 54%

Section: Petrogenic Evolutionmentioning

confidence: 97%

Section: Petrogenic Evolutionmentioning

confidence: 99%

Section: Regional Geologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Geochemistry and fluid characteristics of the Dalli porphyry Cu–Au deposit, Central Iran

Zarasvandi

Rezaei

Raith

et al. 2015

Journal of Asian Earth Sciences

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Molybdenite Re–Os dating, petrology, and geochemistry of granitoids in the Bondar Hanza porphyry Cu deposit (Urumieh‐Dokhtar magmatic arc), Iran: Insight into petrogenesis, mineralization, and tectonic setting

et al. 2020

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The Bondar Hanza porphyry Cu deposit, hosted by a granitoid stock, is located 120 km south of Kerman city in the elongated NW-SE trending Urumieh-Dokhtar magmatic arc (UDMA), Iran. The granitoid stock is a multiphase intrusive body, 2 km 2 in surface area, which comprises microdiorite-microquartz diorite and granite-granodiorite. Petrological and geochemical analyses show that granitoids are peraluminous, magnesian, calcic to alkali-calcic, and non-adakitic intrusions characterized by negative Eu* anomalies. Thermobarometric and oxygen fugacity calculations indicate that magma emplacement occurred at 719-784 C, <100 MPa, and at a log fO 2 of NNO +1.6 to +3.2. Sulphur isotopic composition of sulphide minerals (δ 34 S = 5.0-6.8 ‰) are similar to other porphyry Cu deposits worldwide. Molybdenite separates yield Re-Os ages of 28.22-28.03 Ma, indicating that the Cu mineralization and associated magmatism occurred during the Oligocene. The Bondar Hanza is one of the several granitoids from small porphyry Cu deposits in the UDMA that is related to island arc sub-productive granitoids. It seems that the largest ore-hosting porphyry systems within the UDMA are generally restricted to Miocene intrusions with adakitic affinity (e.g., Sarcheshmeh granitoids) and that the temporally discrete non-adakitic magmatic systems are sub-productive to barren. These data are interpreted to show that magmatism in the Bondar Hanza region was likely associated with partial melting of juvenile lower crust induced by north-eastward subduction of the Neo-Tethys oceanic lithosphere.

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Geological characteristics and ore‐forming conditions of the Tasikmadu porphyry Cu–Au prospect in Trenggalek, East Java, Indonesia

Idrus,

Kaneko,

Takahashi

et al. 2024

Geological Journal

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Tasikmadu is a newly discovered porphyry Cu–Au prospect in the eastern Sunda arc, Indonesia. This study aimed to elucidate salient diagnostic characteristics and ore‐forming conditions of the prospect. Fieldwork and various laboratory analyses for a suite of representative samples were performed for mineralogy, bulk‐geochemistry, mineral chemistry and ore fluid characterization. The study area is composed of three diorite porphyries, that is, fine‐grained, medium‐grained and coarse‐grained diorite porphyry, respectively. The intrusions are calc‐alkaline with a high Sr/Y value, which is similar to many ore‐bearing intrusions in the eastern Sunda arc. Ore mineralization occurs in quartz veins and veinlet stockwork, centred in the potassic zone, and dominated by chalcopyrite and bornite occurring in A and B veins, which cut earlier barren (EB) and M veins. The mineralization core has an average grade of 0.63 wt% Cu and 0.25 ppm Au, respectively. Outwardly, the potassic zone changes to the propylitic zone, which still bears copper in the quartz and pyrite veinlets, although the grade is low. Fluid inclusion microthermometry revealed that the A and B veins in the potassic zone formed at 464 and 390°C by hypersaline boiling fluids, respectively. The temperature temporally and spatially decreased, that is, in the propylitic zone, the quartz veinlets formed at 260–400°C. Hypogene mineralization that formed the A veins occurred at 1.5 km below the palaeosurface, indicating a relatively shallow depth as a porphyry deposit. Nevertheless, the δ34SCDT values of sulphides range from −2.0 to −0.1‰, inferring a magmatic origin. The Tasikmadu prospect shares some similarities compared with other porphyry deposits worldwide, but it also reveals unique characteristics that differ from others, for example, potassic‐altered rocks are only typified by secondary biotite without/rare secondary K‐feldspar reflecting the lack of magma contamination by continental crustal components. In addition, current surface geological features and shallow depth erosion level of the prospect may imply that the potential of Cu–Au mineralization underneath is still open to depth.

show abstract

Rare earth element signatures of economic and sub-economic porphyry copper systems in Urumieh–Dokhtar Magmatic Arc (UDMA), Iran

Cited by 63 publications

References 57 publications

Geochemistry and fluid characteristics of the Dalli porphyry Cu–Au deposit, Central Iran

Geochemistry and fluid characteristics of the Dalli porphyry Cu–Au deposit, Central Iran

Molybdenite Re–Os dating, petrology, and geochemistry of granitoids in the Bondar Hanza porphyry Cu deposit (Urumieh‐Dokhtar magmatic arc), Iran: Insight into petrogenesis, mineralization, and tectonic setting

Geological characteristics and ore‐forming conditions of the Tasikmadu porphyry Cu–Au prospect in Trenggalek, East Java, Indonesia

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