U–Pb and Re–Os geochronological evidence for the Jurassic porphyry metallogenic event of the Xiongcun district in the Gangdese porphyry copper belt, southern Tibet, PRC

Lang, Xinghai; Tang, Juxing; Li, Zhijun; Huang, Yong; Ding, Feng; Yang, Huanhuan; Xie, Furen; Zhang, Li; Wang, Qin; Zhou, Yun

doi:10.1016/j.jseaes.2013.08.009

Cited by 119 publications

(83 citation statements)

References 43 publications

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“…Mao et al (1999) and Stein et al (2001) suggested that deposits derived from mantle sources could have significantly higher Re contents in molybdenites than those deposits that are derived from crustal sources. The Re contents in the molybdenites from the No.2 deposit vary from 1015 to 1354 ppm (Lang et al, 2014a), which is consistent with those in mantle-derived deposits (Re contents in the molybdenites more than hundreds of ppm, Mao et al, 1999). This suggests that the Re in molybdenites of the No.2 deposit could have a mantle source.…”

Section: Sources Of Ore-forming Metalssupporting

confidence: 78%

“…Analytical reproducibility is better than ± 0.2‰ for δ 18 O, ± 2‰ for δD. δ 18 O H2O was calculated according to oxygen isotope compositions of the quartz using the equilibrium fractionation equation 1000lnα Quartz-H2O = 3.38 × 10 6 /T 2 -3.4 (Clayton et al, 1972) In-situ zircon Hf isotopic analysis was carried out on zircon grains from the Early Jurassic quartz diorite porphyry that were previously analyzed for U-Pb isotopes by Lang et al (2014a). Hf isotopes of those zircons were obtained using a Nu Plasma Multi-Collector MC-ICP-MS instrument, which is coupled to a 193 nm ArF Excimer laser-ablation system.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

“…1d; Lang et al, 2014b). The latest exploration results (Tang et al, 2012) and geochronology research (Lang et al, 2014a) show that mineralization in the No.2 deposit is related to the 181-175 Ma (zircon U-Pb age) Early Jurassic quartz diorite porphyry and formed ca. 172.6 ± 2.1 Ma (molybdenite Re-Os age), whereas mineralization at the No.1 deposit is related to the 167-161 Ma (zircon U-Pb age) Middle Jurassic quartz diorite porphyry and formed ca.161.5 ± 2.7 Ma (molybdenite Re-Os age).…”

Section: Introductionmentioning

confidence: 95%

“…Three samples (7226-233.7, 7224-159.9 and 7235-123.4) from the Early Jurassic quartz diorite porphyry yielded zircon U-Pb weighted average ages of 181.8 ± 1.5 Ma, 175.7 ± 1.5 Ma and 179 ± 2 Ma, respectively, interpreted as the magmatic crystallization age of the porphyry (Lang et al, 2014a …”

Section: Timing Of the Magmatism And Mineralizationmentioning

confidence: 99%

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Geology and Geochemistry Constraints on the Genesis of the NO.2 Porphyry Copper-Gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

Yin¹

2017

Appl Ecol Env Res

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Abstract. The Xiongcun district is located in the western segment of the Gangdese porphyry copper belt (GPCB). The No.2 deposit in the Xiongcun district hosts a measured and indicated resource of 1.34 Mt copper, 76.34 t gold, and 193.78 t silver. The copper-gold mineralization of the No.2 deposit is mainly hosted in the Early Jurassic quartz diorite porphyry which intruded volcano-sedimentary rocks of the Early Jurassic Xiongcun Formation. S and Pb isotopic compositions of the ore sulfides and Re contents of molybdenite suggest a mantle source with minor contamination of subducted sediments for the ore-forming materials. Hydrogen and oxygen isotopic compositions of quartz from the quartz -sulfide veins suggest that the ore-forming fluid was a mixture of magmatic and meteoric water. Geochemical and Sr-Nd-Hf isotopic compositions of the Early Jurassic quartz diorite porphyry suggest that the mineralization of the No.2 deposit formed in an intra-oceanic island arc setting. The magmas of the Early Jurassic quartz diorite porphyry were likely sourced from partial melting of mantle with limited contamination by subducted sediments (ca. 5%). The formation of the porphyry and the No.2 deposit were related to the northward intra-oceanic subduction of the Neo-Tethys oceanic slab during the Early Jurassic.

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Section: Sources Of Ore-forming Metalssupporting

confidence: 78%

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Timing Of the Magmatism And Mineralizationmentioning

confidence: 99%

See 2 more Smart Citations

Geology and Geochemistry Constraints on the Genesis of the NO.2 Porphyry Copper-Gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

Yin¹

2017

Appl Ecol Env Res

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“…Several older arc and collision-related porphyry-/skarn-type Cu ± Au ± Mo deposits have also been recognized in the GBST (Figure 1c), such as the Middle Jurassic Xiongcun porphyry Cu-Au deposit (ca. 182-160 Ma, Tafti et al 2009;Lang et al 2014), the Late Cretaceous Kelu (ca. 93-90 Ma, Jiang et al 2012) and Sambujiala skarn Cu-Au deposits (ca.…”

Section: Introductionmentioning

confidence: 97%

Zircon U–Pb geochronology and geochemistry of Late Cretaceous–early Eocene granodiorites in the southern Gangdese batholith of Tibet: petrogenesis and implications for geodynamics and Cu ± Au ± Mo mineralization

Jiang

Wang

Wyman

et al. 2015

International Geology Review

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Cu ± Au ± Mo mineralization is found in multiple intrusive suites in the Gangdese belt of southern Tibet (GBST). However, the petrogenesis of these ore-bearing intrusive rocks remains controversial. Here, we report on mineralization-related Late Cretaceous-early Eocene intrusive rocks in the Chikang-Jirong area, southern Gangdese. Zircon U-Pb analyses indicate that the mainly granodioritic Chikang and Jirong plutons were generated in the Late Cretaceous (ca. 92 Ma) and early Eocene (ca. 53 Ma), respectively. They are high-K calc-alkaline suites with high SiO 2 (64.8-68.3 wt.%) and Al 2 O 3 (15.1-15.7 wt.%) contents. Chikang granodiorites are characterized by high Sr (835-957 ppm), Sr/Y (118-140), Mg# (58-60), Cr (21.8-36.6 ppm), and Ni (14.3-22.9 ppm), and low Y (6.0-8.1 ppm), Yb (0.54-0.68 ppm) values with negligible Eu anomalies, which are similar to those of typical slab-derived adakites. The Jirong granodiorites have high SiO 2 (64.8-65.3 wt.%) and Na 2 O + K 2 O (7.19-7.59 wt.%), and low CaO (2.45-3.69 wt.%) contents, Mg# (47-53) and Sr/Y (14-16) values, along with negative Eu and Ba anomalies. Both Chikang and Jirong granodiorites have similar ε Hf (t) (7.6-13.1) values. The Chikang granodiorites were most probably produced by partial melting of subducted Neo-Tethyan oceanic crust, and the Jirong granodiorites were possibly generated by partial melting of Gangdese juvenile basaltic crust. In combination with the two peak ages (100-80 and 65-41 Ma) of Gangdese magmatism, we suggest that upwelling asthenosphere, triggered by the rollback and subsequent break-off of subducted Neo-Tethyan oceanic lithosphere, provided the heat for partial melting of subducted slab and arc juvenile crust. Taking into account the contemporaneous occurrence of Gangdese magmatism and Cu ± Au ± Mo mineralization, we conclude that the Late Cretaceous-early Eocene magmatic rocks in the GBST may have a significant potential for Cu ± Au ± Mo mineralization.

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Geochronological and geochemical constraints on the origin of Yaguila Cretaceous and Palaeogene ore-bearing quartz porphyries, Central Lhasa Terrane, Tibet

et al. 2015

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The quartz porphyries at Yaguila, Tibet, host important polymetallic ore deposits, but their age, source and evolution have received insufficient attention. In this study, LA-ICP-MS U-Pb zircon ages revealed that these quartz porphyries were formed in two stages, i.e. precollisional Early Cretaceous period (ca. 128 Ma) and late subduction to initial collision Palaeogene period (ca. 65 Ma). Geochemical evidence including whole-rock major element, trace element and rare earth element, zircon Hf isotopes together with sulphide Pb isotopes suggests the Early Cretaceous quartz porphyries could have formed by means of partial melting of crustal materials from Lhasa Terrane basement in a thickened crustal tectonic setting, whereas the Palaeogene quartz porphyries by enhanced input of mantle components probably were associated with slab rollback and breakoff at that time. Granitoid magmas produced in this way ascended to upper crustal level and interacted with marbles and breccias to form Pb-Zn-Ag ore bodies and Mo ore bodies, respectively. Age and geochemical constraints on the Early Cretaceous and Palaeogene polymetallic ore bodies not only have favoured a skarn and hydrothermal vein origin over a submarine exhalative sedimentary origin but also have consummated ore deposits metallogenic series and built up a reconnaissance model along the Lhasa Terrane.

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U–Pb and Re–Os geochronological evidence for the Jurassic porphyry metallogenic event of the Xiongcun district in the Gangdese porphyry copper belt, southern Tibet, PRC

Cited by 119 publications

References 43 publications

Geology and Geochemistry Constraints on the Genesis of the NO.2 Porphyry Copper-Gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

Geology and Geochemistry Constraints on the Genesis of the NO.2 Porphyry Copper-Gold Deposit in the Xiongcun District, Gangdese Porphyry Copper Belt, Tibet, China

Zircon U–Pb geochronology and geochemistry of Late Cretaceous–early Eocene granodiorites in the southern Gangdese batholith of Tibet: petrogenesis and implications for geodynamics and Cu ± Au ± Mo mineralization

Geochronological and geochemical constraints on the origin of Yaguila Cretaceous and Palaeogene ore-bearing quartz porphyries, Central Lhasa Terrane, Tibet

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