Felsic Igneous Rocks in the Hua'aobaote Pb‐Zn‐Ag Polymetallic Orefield, Southern Great Xing'an Range: Genesis, Metallogenetic and Tectonic Significance

Shang, Zhi; Chen, Yongqing; Guo, Xiangguo

doi:10.1111/1755-6724.14729

Cited by 4 publications

(7 citation statements)

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“…The separation of plagioclase and potassium feldspar directly affects the Ba and Sr contents (Shang et al, 2022). In the Ba-Sr and Rb/Sr-Sr diagrams (Fig.…”

Section: Petrogenesis Of the Granitesmentioning

confidence: 99%

Petrogenesis and Tectonic Significance of Shenxianshui Alkaline Granite in Gejiu, Yunnan Province, China

YANG,

CHEN

2024

Acta Geologica Sinica (Eng)

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The Shenxianshui granites in the Gejiu western area were formed in the Late Cretaceous. Laser ablation inductively coupled plasma mass spectrometry indicates zircon U–Pb ages ranging from 85.97 ± 0.6 Ma to 90.67 ± 0.7 Ma. The intrusive rocks are peraluminous (A/CNK=1.03 to 1.33) and calc–alkaline, showing an affinity towards I–type granite. Large ion lithophilic elements are enriched in K and Rb, while high field strength elements are depleted. Moreover, light rare earth elements are significantly enriched, showing a slight negative Eu anomaly (Eu/Eu*=0.39 to 0.58). Shenxianshui granite has a relatively high initial Sr isotope ratio ((87Sr/86Sr)i = 0.7098∼0.7105), negative ɛNd(t) values (−7.99 to −7.44) and negative ɛHf(t) values(−8.37 to −2.58). Combined with previous studies, these characteristics suggest that the Shenxianshui alkaline granites were formed in a post–collision extensional environment. The basic granitic magma may have principally originated from the partial melting of the lower crust in the Mesoproterozoic era, and possibly contained mantle source materials. Shenxianshui alkaline granite was finally formed following the miscible magma and a high degree of crystal differentiation. The abundance of ore–forming elements indicates that Shenxianshui granite has the potential for mineralization of key metals and rare earth elements.

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“…The separation of plagioclase and potassium feldspar directly affects the Ba and Sr contents (Shang et al, 2022). In the Ba-Sr and Rb/Sr-Sr diagrams (Fig.…”

Section: Petrogenesis Of the Granitesmentioning

confidence: 99%

Petrogenesis and Tectonic Significance of Shenxianshui Alkaline Granite in Gejiu, Yunnan Province, China

YANG,

CHEN

2024

Acta Geologica Sinica (Eng)

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“…The serpentinized harzburgite and gabbro, with a zircon U-Pb age of 337.3 ± 3.2 Ma [29], are distributed along the Huaaobaote tectonic mélange belt that is part of the Meilaotewula ophiolite belt. The Permian diorite porphyry, with zircon U-Pb ages of 285.9 ± 4.1 Ma [29] and 294.8 ± 3.2 Ma [30], is scattered in the eastern part of the Huaaobate area. The Early Cretaceous intrusions are mainly distributed in the southwestern part of the Huaaobaote area, such as the Ganggantewula intrusion.…”

Section: Ore Geologymentioning

confidence: 99%

“…The Early Cretaceous intrusions are mainly distributed in the southwestern part of the Huaaobaote area, such as the Ganggantewula intrusion. Moreover, there are also quantities of the Early Cretaceous granite porphyry and hypabyssal rhyolite veins, with zircon U-Pb ages of 136-132.6 Ma [27,29,30], which are closely related to the spatial distribution of the orebodies. Structures in the Huaaobaote area are dominated by faults and folds.…”

Section: Ore Geologymentioning

confidence: 99%

“…The superlarge Huaaobaote Ag-Pb-Zn deposit accompanied by Cu, Sn, and Sb is located on the west slope of the SGXR. Previous studies have mainly focused on the characteristics of the Ag-Pb-Zn orebodies of the deposit [14,26,27] and the age of the igneous rocks in the ore district [28][29][30]. The mineralization of the Huaaobaote deposit is closely related to the subvolcanic rocks [14] and is distinguished from the Sn-Ag-polymetallic deposits in the SGXR, which are mainly related to Early Cretaceous highly fractionated granite [13].…”

Section: Introductionmentioning

confidence: 99%

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Age, Fluid Inclusion, and H–O–S–Pb Isotope Geochemistry of the Superlarge Huaaobaote Ag–Pb–Zn Deposit in the Southern Great Xing’an Range, NE China

Li²,

Chen

et al. 2023

Minerals

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The superlarge Huaaobaote Ag–Pb–Zn deposit is located on the western slope of the southern Great Xing’an Range (SGXR). The deposit includes four ore blocks, namely, ore blocks I, II, III, and V. Except for the no. I orebody of ore block I, which is hosted in the contact zone between the Carboniferous serpentinized harzburgite and the Permian siltstone, the other orebodies all occur as veins controlled by faults. The mineralization process at the deposit can be divided into four stages: cassiterite–arsenopyrite–pyrite–quartz stage (stage I), cassiterite–chalcopyrite–pyrite–freibergite–arsenopyrite–pyrrhotite–quartz stage (stage II), sphalerite–galena–jamesonite–stibnite–freibergite–silver mineral–quartz–calcite–chlorite stage (stage III), and argentite–pyrargyrite–pyrite–quartz–calcite (stage IV). Cassiterite U–Pb dating of the Huaaobaote deposit yielded ages of 136.3–134.3 Ma, indicating that the deposit formed in the Early Cretaceous period. Two types of fluid inclusions (FIs), including liquid-rich and gas-rich FIs, have been distinguished in the quartz vein and sphalerite. The homogenization temperature during the four stages gradually decreases, with temperatures of 302–340 °C for stage I, 267–304 °C for stage II, 186–273 °C for stage III, and 166–199 °C for stage IV, respectively. The salinity (wt% NaCl eqv.) at stages I, II, III, and IV is 3.7–6.6, 0.2–4.5, 0.2–5.0, and 0.4–1.6, respectively, indicating that the ore-forming fluid is characterized by low salinity. The δ18Owater and δD values of the ore-forming fluid range from −11.9‰ to 7.9‰ and −168‰ to −76‰, respectively, indicating that the ore-forming fluid was dominantly derived from a mixture of magmatic and meteoric water. The calculated δ34SH2S values range from −3.6‰ to 1.2‰, indicating that the sulfur mainly came from granitic magma. The 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb ratios of sulfides are in the ranges of 18.195–18.317, 15.509–15.667, and 37.965–38.475, respectively, implying that the ore-forming material was mainly derived from felsic magma that may be formed by the partial melting of orogenic materials. Fluid mixing, cooling, and immiscibility were the three primary mechanisms for mineral precipitation in the Huaaobaote deposit.

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“…Sedimentary successions, detrital zircon U-Pb dating, and detrital compositions show that sediments were deposited in a backarc basin (Wang B R et al, 2020) or continental rift (Xu et al, 2014(Xu et al, , 2018Zhao et al, 2017;Zhang Y J et al, 2018;Wang Y Y et al, 2021) in the Early Permian. Moreover, the geochemistry of magmatic rocks in the Early Permian indicates an island arc (Wang J F et al, 2017;Li et al, 2021;Liu et al, 2022;Shang et al, 2022), post-collisional extensional setting (Liu et al, 2018;Wang G S et al, 2018) or continental rift (Zhu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Provenance of Conglomerate and Sandstone from Early Permian Shoushangou Formation in Xi Ujimqin, Inner Mongolia: Implications for Understanding Paleo‐Asian Ocean Subduction

ZHANG,

GUO,

2024

Acta Geologica Sinica (Eng)

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During the Late Carboniferous to Early Permian, a rift was formed by post‐collisional extension after ocean closure or an island arc‐related basin formed by Paleo‐Asian Ocean (PAO) subduction in the Xi Ujimqin area. Nevertheless, the closure time of the PAO is still under debate. Thus, to identify the origin of the PAO, the geochemistry and U‐Pb age of zircons were analyzed for the extra‐large deep marine, polymict clastic boulders and sandstones in the Shoushangou Formation within the basin. The analyses revealed magmatic activity and tectonic evolution. The conglomerates include megaclasts of granite (298.8 ± 9.1 Ma) and granodiorite porphyry (297.1 ± 3.1 Ma), which were deposited by muddy debris flow. Results of this study demonstrated that the boulders of granitoids have the geochemistry of typical I‐type granite, characterized by low Zr + Nb + Ce + Y and low Ga/Al values. The granitoid boulders were formed in island arc setting, indicating the presence of arc magmatism in the area that is composed of the Late Carboniferous– to Early Permian subduction‐related granitoid in southern Xi Ujimqin. Multiple diagrams for determining sedimentary provenance using major and trace elements indicate that Shoushangou sediments originated from continental island arc‐related felsic rocks. Detrital zircon U‐Pb age cluster of 330–280 Ma was obtained, indicating input from granite, ophiolite, Xilin Gol complex, and Carboniferous sources to the south. The basin was geographically developed behind the arc during the Early Permian period because the outcropped intrusive rocks in the Late Carboniferous to Early Permian form a volcanic arc. The comprehensive analyses of source areas suggest that Shoushangou sediments developed in a backarc basin in response to the northward subduction of the PAO. The backarc basin and intrusive rocks, in addition to previously published Late Carboniferous to Early Permian magmatic rocks of arc unit in Xilin Gol, confirm the presence of an Early Permian trench‐arc‐basin system in the region, represented by the Baolidao arc and Xi Ujimqin backarc basin. This study highlights the importance and potential of combined geochemical and geochronological studies of conglomerates and sandstone for reconstructing the geodynamic setting of a basin.

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Felsic Igneous Rocks in the Hua'aobaote Pb‐Zn‐Ag Polymetallic Orefield, Southern Great Xing'an Range: Genesis, Metallogenetic and Tectonic Significance

Cited by 4 publications

References 63 publications

Petrogenesis and Tectonic Significance of Shenxianshui Alkaline Granite in Gejiu, Yunnan Province, China

Petrogenesis and Tectonic Significance of Shenxianshui Alkaline Granite in Gejiu, Yunnan Province, China

Age, Fluid Inclusion, and H–O–S–Pb Isotope Geochemistry of the Superlarge Huaaobaote Ag–Pb–Zn Deposit in the Southern Great Xing’an Range, NE China

Provenance of Conglomerate and Sandstone from Early Permian Shoushangou Formation in Xi Ujimqin, Inner Mongolia: Implications for Understanding Paleo‐Asian Ocean Subduction

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