Geology and geochemistry of the Qiaoxiahala Fe–Cu–Au deposit, Junggar region, northwest China

Li, Qiang; Zhang, Zhixin; Geng, Xinxia; Li, Chao; Liu, Feng; Chai, Fei; Yang, Fuquan

doi:10.1016/j.oregeorev.2013.08.003

Cited by 36 publications

(22 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-resolution (HR)-ICP-MS molybdenite Re-Os dating had yielded 375.2 ± 2.6 Ma and 377.4 ± 4.3 Ma for the Qiaoxiahala Fe-Cu deposit Li et al, 2014), consistent with the formation age of the mineralization-related diorite porphyry (this study, ca. 380 Ma).…”

Section: Timing Of Magmatism and Mineralizationsupporting

confidence: 80%

“…398-385 Ma; Griffin et al, 2004). The Devonian age is consistent with the oldest intrusions reported in the Beitashan Formation, including SHRIMP U-Pb zircon ages of 381-376 Ma and LA-ICP-MS zircon U-Pb ages of 393-375 Ma (Xiang et al, 2009;Zhao et al, 2009;Lu et al, 2012;Yang et al, 2012;Li et al, 2014), indicating that the Beitashan Formation was formed older than ca. 393 Ma.…”

Section: Timing Of Magmatism and Mineralizationsupporting

confidence: 72%

“…Exposed strata in the region comprise mainly upper Paleozoic volcanosedimentary rocks (Fig. 1c), including (from the bottom to top) the Tuoranggekuduke Formation (D 1 ) marine pyroclastic and sedimentary rocks, the Beitashan Formation (D 2 ) mafic to intermediate volcanic, pyroclastic and carbonate rocks; the Yundukala Formation (D 2 ) shallow marine fine-grained clastic rocks intercalated with intermediate-mafic volcanic rocks; the Jiangzierkuduke Formation (D 3 ) pyroclastic rocks (dominantly tuffs), interbedded sandstone, basaltic andesite, andesite and dacite; the Nanmingshui Formation (C 1 ) volcano-sedimentary rocks; the Batamayineishan Formation (C 2 ) basalt and basaltic andesite with minor interbedded andesite, rhyolite, tuff, siltstone and carbonaceous shale and the Zhaheba Formation (P) continental coal-bearing sedimentary rocks Li et al, 2014).…”

Section: Regional Geologymentioning

confidence: 99%

“…3e and f) and contains a groundmass (90%) dominated by microcrystalline feldspar (40%; mainly Na-rich plagioclase with alkali-feldspar), quartz (50%) and rare amphibole, whereas the phenocrysts comprise mainly anhedral-subhedral K-feldspar (0.01-0.04 mm; $5%), quartz (0.01-0.04 mm; $5%) with accessory minerals of rare zircon and apatite. Amphibole typically occurs as veins in the interstices Li et al, 2014;Yan et al, 2005;Ying, 2007). (b) Geological map of the eastern part of the Qiaoxiahala deposit (modified from Li et al, 2014;Yan et al, 2005;Ying, 2007). between the feldspar and quartz.…”

Section: Petrographic Description Of Samplesmentioning

confidence: 99%

“…Amphibole typically occurs as veins in the interstices Li et al, 2014;Yan et al, 2005;Ying, 2007). (b) Geological map of the eastern part of the Qiaoxiahala deposit (modified from Li et al, 2014;Yan et al, 2005;Ying, 2007). between the feldspar and quartz. Moderate silicic alteration is present.…”

Section: Petrographic Description Of Samplesmentioning

confidence: 99%

See 4 more Smart Citations

The Paleozoic tectonic evolution and metallogenesis of the northern margin of East Junggar, Central Asia Orogenic Belt: Geochronological and geochemical constraints from igneous rocks of the Qiaoxiahala Fe-Cu deposit

Liang

Chen

Hollings

et al. 2016

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

Section: Timing Of Magmatism and Mineralizationsupporting

confidence: 80%

Section: Timing Of Magmatism and Mineralizationsupporting

confidence: 72%

Section: Regional Geologymentioning

confidence: 99%

Section: Petrographic Description Of Samplesmentioning

confidence: 99%

Section: Petrographic Description Of Samplesmentioning

confidence: 99%

See 3 more Smart Citations

The Paleozoic tectonic evolution and metallogenesis of the northern margin of East Junggar, Central Asia Orogenic Belt: Geochronological and geochemical constraints from igneous rocks of the Qiaoxiahala Fe-Cu deposit

Liang

Chen

Hollings

et al. 2016

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

Petrogenesis and tectonic setting of the Middle Devonian Beitashan Formation volcanic rocks in the northern East Junggar, NW China: Insights from geochemistry, zircon U–Pb dating, and Hf isotopes

Yang

et al. 2019

Geological Journal

View full text Add to dashboard Cite

The Devonian volcanic rocks are widely distributed in the East Junggar (Xinjiang, NW China), preserving important magmatic records for investigating Palaeozoic tectonic evolution. The Beitashan Formation is mainly composed of pyroclastic rocks and sedimentary rocks in the lower section and intermediate–basic volcanic lava and pyroclastic rocks in the upper section. In this paper, we present geochronological, geochemical, and in situ Lu–Hf isotopic data for Beitashan Formation volcanic rocks from the East Junggar. Zircon U–Pb analyses from a basalt sample by laser ablation inductively coupled plasma mass spectrometry yielded a weighted mean age of 387.8 ± 4.5 Ma, indicating that it was generated in the Middle Devonian. The basic–intermediate volcanic rocks are tholeiitic to calc‐alkalic and are characterized by MgO (2.29–5.91 wt.%), low TiO2 (0.75–1.36 wt.%), and relatively high Al2O3 (15.82–16.73 wt.%). Furthermore, they display enrichment in light rare‐earth elements and large‐ion lithophile elements (such as Ba and Sr) and depletion in Nb, Ta, and Ti, along with slightly positive Eu anomalies (δEu = 0.83–1.15) and Ce anomalies (δCe = 1.00–1.11). In addition, in situ zircon Hf isotopic analyses from basalt samples show εHf(t) values ranging from +4.33 to +15.2, indicating a depleted mantle source with minor crustal contamination. They also show relatively low Nb/Zr (0.04–0.06), Th/Yb (0.67–3.83), and Ba/La (6.79–67.53) and high Ce/Th (7.71–18.94), Ba/Rb (21.39–294.28), and Ba/Th (31.42–486.58). The geochemical data suggest these rocks were likely derived from 10% to 30% partial melting of a garnet‐rich with minor spinel‐bearing Iherzolite depleted mantle metasomatized by slab‐derived fluids, with crustal contamination. Combined with the geological setting and previous studies, we suggest that the northern East Junggar was in a northward‐subducted island‐arc setting in the Devonian.

show abstract

Pyrite and magnetite Re–Os isotope systematics at the Laoshankou Fe–Cu–Au deposit in the northern margin of the East Junggar terrane, NW Xinjiang, China: Constraints on the multistage mineralization and metal sources

et al. 2019

View full text Add to dashboard Cite

The northern margin of the East Junggar terrane is highly prospective for Fe-Cu-Au mineralization. However, due to the lack of precise mineralization ages, intensive debates regarding ore genesis existed. In this study, pyrite and magnetite Re-Os isotopes are first used to determine the metallogenic ages and possible genetic links with magmatism at the Laoshankou deposit, the most important Fe-Cu-Au deposit in the region. Magnetites from Fe mineralization stage yield an 187 Re/ 188 Os versus 187 Os/ 188 Os isochron age of 391 ± 55 Ma, which is in broad agreement with ages of the Beitashan Formation volcanic rocks (~390 Ma). The low initial 187 Os/ 188 Os ratio of −0.08-0.16, depleted γOs values of −161-27 and low Re/Os (common) indicated a mantle source composition, implying Fe metals are from the Beitashan Formation Fe-rich basalts and basaltic breccias. Pyrites from sulfide mineralization stage yield a weighted average Re-Os model age of 390 ± 17 Ma with a matched 187 Re versus 187 Os r (radiogenic 187 Os) isochron age of 391 ± 9 Ma, consistent with the symbiotic molybdenite Re-Os model age of 383.2 ± 4.5 Ma, indicating a timing of~380 Ma for sulfide-Cu-Au mineralization.The high initial 187 Os/ 188 Os ratio of 0.53-3.6, large positive γOs values of 323-2,754 and higher Re/Os (common) indicated the increase of crustal materials, which is further limited to the Beitashan Formation S-rich marine sedimentary rocks.In summary, based on the significant two-stage mineralization, that is, Fe (~390 Ma) and sulfide-Cu-Au (~380 Ma), and the different nonmagmatic fluid and metal sources, we prefer considering the Laoshankou Fe-Cu-Au deposit as an IOCG-type. KEYWORDS multistage mineralization, ore genesis, Re-Os geochronology, the northern margin of the East Junggar, the Laoshankou Fe-Cu-Au deposit

show abstract

Geology and geochemistry of the Qiaoxiahala Fe–Cu–Au deposit, Junggar region, northwest China

Cited by 36 publications

References 69 publications

The Paleozoic tectonic evolution and metallogenesis of the northern margin of East Junggar, Central Asia Orogenic Belt: Geochronological and geochemical constraints from igneous rocks of the Qiaoxiahala Fe-Cu deposit

The Paleozoic tectonic evolution and metallogenesis of the northern margin of East Junggar, Central Asia Orogenic Belt: Geochronological and geochemical constraints from igneous rocks of the Qiaoxiahala Fe-Cu deposit

Petrogenesis and tectonic setting of the Middle Devonian Beitashan Formation volcanic rocks in the northern East Junggar, NW China: Insights from geochemistry, zircon U–Pb dating, and Hf isotopes

Pyrite and magnetite Re–Os isotope systematics at the Laoshankou Fe–Cu–Au deposit in the northern margin of the East Junggar terrane, NW Xinjiang, China: Constraints on the multistage mineralization and metal sources

Contact Info

Product

Resources

About